Category: Educational

The Weird and Wonderful: Coral Reef

Much of Singapore’s coral reefs have experienced significant impact due to extensive land reclamation and coastal development over the past five decades. From 1922 to 1993, the extent of coral reef areas was reduced by nearly 50%. 

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In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Are corals rocks, plants, or animals?

Montipora coral. Image: Ryan McMinds

Coral reefs are diverse underwater ecosystems that play a critical role in maintaining the health and balance of marine environments. These living structures serve as foundation keystone species and ecosystem engineers, providing habitat and shelter to a multitude of marine species. Despite occupying less than 1% of the marine floor, coral reefs support over 25% of the world’s marine life.

Although corals permanently attach themselves to the ocean floor and “take root” like most plants do, and they don’t have distinct faces or body parts like most animals do, they are animals. 

As foundation species, hard corals play a transformative role in shaping their surrounding environments by building coral reefs that many other organisms use. Coral reefs are made up of hundreds to thousands of small, delicate marine organisms known as coral polyps. These tiny coral polyps secrete a hard outer skeleton of calcium carbonate that attaches to rock or the dead skeletons of other polyps. Over time, as the calcium carbonate accumulates and corals reproduce, the size of a coral reef grows. They are built over hundreds of thousands of years. 

Mushroom coral skeleton. Image: Jon Zander

Coral polyps live in a symbiotic relationship with a specific type of algae called zooxanthellae that live in their tissues. The coral provides the plant-like organism with a protected environment, sufficient sunlight, and nutrients in the form of the coral’s metabolic waste for photosynthesis, the process by which plants make their food. In return, the zooxanthellae produce oxygen, remove wastes, and supply the coral with the organic products it needs to grow and thrive. 

Not all corals are reef builders; soft corals do not build stony skeletons and don’t have a symbiotic relationship with algae. 

Flowerpot coral. Image: Peter Young

Corals are communal animals related to sea anemones and jellyfish. Each tiny coral polyp uses their stinging tentacles to capture creatures like zooplankton or organic debris that float by. Their symbiotic relationship with zooxanthellae allows them to get additional energy. Remarkably, the zooxanthellae transfer approximately 90% of the organic material they produce to the host coral tissue, enhancing the coral’s nutrient intake.

A symbiotic relationship is a close long-term relationship between two species, where one or both species benefit from the interaction. There are four main symbiotic relationships, mutualism, commensalism, parasitism, and competition.

Coral polyps. Image: Ryan McMinds

Threats faced by coral reefs

Despite their many strengths, coral reefs are fragile and extremely sensitive to environmental conditions. They need clean, clear water to survive and have been especially vulnerable to a diverse range of human activities, including coastal changes and pollution. Today, the challenges faced by coral reefs are further exacerbated by two global trends: increasing sea surface temperatures and ocean acidification, primarily caused by climate change.

Zooxanthellae, in addition to supplying corals with vital nutrients, contribute to the distinctive and vibrant colours observed in many stony corals. When corals undergo physical stress, such as high temperatures, they expel their symbiotic zooxanthellae, losing their main food source. They also lose their colour, resulting in a bleak white appearance. This is commonly described as “coral bleaching”. Prolonged periods without zooxanthellae (and if bleaching events happen too frequently) can lead to the death of the coral colony.

Coral bleaching. Image: EcoCafePranburi

The first global bleaching event occurred in 1998 and killed about 8% of the world’s coral. In the last four decades, there has been a noticeable decrease in the abundance of corals, accompanied by a more frequent occurrence of bleaching incidents and an increase in algae levels within our oceans, which suggest a decline in the overall health of coral reefs. Recent studies, however, have found that reef systems do not respond uniformly to bleaching events and post-bleaching recovery can occur at different degrees. 

What do we know about coral reefs in Singapore?

Much of Singapore’s coral reefs have experienced significant impact due to extensive land reclamation and coastal development over the past five decades. From 1922 to 1993, the extent of coral reef areas was reduced by nearly 50%. Consequently, these activities led to a rise in levels of turbidity and sediment in the marine environment.

Surprisingly, Singapore’s waters host a remarkably diverse array of marine life, boasting a diverse range of over 250 species of reef-forming hard corals that are habitat to over 100 species of reef fishes. Most of the coral reefs are found along the southern shores of Singapore––surrounding the islands, on tidally-exposed areas along the Singapore Straits, and along the last remaining rocky shore on Labrador Beach. There has also been unexpected diversity along man-made seawalls, which cover over 70% of Singapore’s coastline. 

Distribution of coral reefs shaded in purple. Image: Lim et al., Intertidal Marine Species in Singapore

Turbid coral reefs, characterised by high levels of turbidity, are often found in shallow coastal waters close to urban areas like Singapore. They have shown an incredible ability to endure and survive under chronic sediment stress and low-light environmental conditions. It has also been suggested that Singapore’s urbanised reefs can recover quickly from thermal stress events, compared to reefs in more remote areas. 

As climate change continues to drive increases in ocean temperatures, the frequency and intensity of marine heatwaves and severe bleaching events are also on the rise. Additionally, rising sea levels are resulting in deeper waters above shallow reefs, reducing the amount of light that reaches the corals, and potentially threatening reefs around the world.

Exposed reef. Image: Yeowatzup

While our coral reefs demonstrate remarkable resilience and adaptability in coping with challenging conditions of reduced light and high temperatures, there can still be negative impacts on their overall health and growth. The survival of these vital marine ecosystems depends on our proactive and innovative measures and solutions to mitigate the effects of climate change. By acting now, we can work towards preserving and safeguarding these valuable ecosystems.

How can you contribute to protecting and conserving our coral reefs?

  • Practice responsible snorkelling and diving. Avoid touching or stepping on corals and maintain a safe distance from marine life
  • Choose reef-friendly sunscreen. Use mineral-based sunscreen that is free of harmful chemicals known to cause coral bleaching.
  • Reduce pollution and waste to prevent pollutants from entering the marine environment.
  • Support sustainable seafood practices to reduce the demand for destructive fishing practices.
  • Contribute to reef restoration efforts. Volunteer or donate to organisations that actively work towards restoring damaged reefs and promoting their conservation. Explore WildSingapore’s list of opportunities for individuals to contribute their assistance.
  • Respect marine protected areas. Observe and adhere to regulations when visiting Sisters’ Islands Marine Park. 

If you come across coral reefs in the wild, we encourage you to (safely and respectfully) capture photos and document your observations. We especially recommend using the local SGBioAtlas app, or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

Further reading:

🇸🇬 100,000 corals to be planted in Singapore waters, Big Sister’s Island to reopen in 2024

📋 Scientists Are Learning How to Help Coral Reefs Save Themselves

The Weird and Wonderful: Sea Star

Sea Stars, commonly called Starfish, are not fish. They don’t have gills, fins, scales, and no backbone. These star-shaped invertebrates are related to sea urchins and sea cucumbers, which all belong to the group Echinodermata––meaning spiny skin.

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In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Sea Stars

Sea Stars, commonly called Starfish, are not fish. They don’t have gills, fins, scales, and no backbone. These star-shaped invertebrates are related to sea urchins and sea cucumbers, which all belong to the group Echinodermata––meaning spiny skin. Echinoderms have hard calcified skin that helps them protect them from most predators.

Image courtesy of Profmauri

Sea stars can be found in every ocean of the world. Most species have five long arms that join a central disk, although some may have more like the Eight-armed Sea Star!

Common name: Eight-armed Sea Star

Scientific name: Luidia maculate 

The Eight-armed Sea Star is native to the Indo-Pacific region. It is one of the largest species of sea stars in Singapore and can grow up to 60cm across in diameter. The number of arms can range from five to nine, but it is commonly observed that they have eight arms. It is often spotted in sub-tidal waters or near areas with seagrass or coral rubble in Northern shores. It feeds on both algae, rotting plants, mussels, clams, snails, worms, and other small creatures.  

Image courtesy of Walaa

Sea stars are known for their five-point radial symmetry. Some sea stars have arms so short and stubby that they resemble a pentagon, like the Cushion Star.

Common name: Cushion Star

Scientific name: Culcita novaeguineae

The Cushion Star is a small sea star that grows up to 5cm. It has very short, broad arms and a puffy appearance, resembling a pentagonal pin cushion. It varies in colour and can be found in tropical waters in the Indo-Pacific. It feeds on algae, barnacles, and other invertebrates. To catch its food, the cushion star inflates its “cushion”, and deflates on top of its prey.

Image courtesy of Shizhao

Sea stars have hundreds of suction-bottomed tube feet on the underside of their arms. These tube feet serve various functions such as helping sea stars move, attach to surfaces, and collect food.

Most sea stars are carnivores, feeding on sea urchins, clams, oysters, crabs, and snails. They display a scavenging behaviour, devouring nearly anything they can grasp with their arms.  Certain species are omnivores, also incorporating algae and decaying plant matter in their diet. 

Image courtesy of California Sea Grant

In numerous ecosystems, sea stars play a vital role as keystone species, contributing to the maintenance of a healthy marine ecosystem. Their position as natural predators of sea urchins enables them to effectively control the population of sea urchins. Sea urchins have a voracious appetite for kelp and other vegetation, which serve as critical habitat and a food source for a wide variety of species. If sea stars were to decline or die off, the sea urchin population would multiply unchecked, leaving them to consume kelp uncontrollably. In Northern California, for example, the sunflower sea star’s disappearance has turned kelp forests into “urchin barrens”. 

In any ecosystem, including marine ecosystems, a keystone species plays a vital role in maintaining the overall structure and function of the system. Without their presence, ecosystems would experience significant alterations and may struggle to adapt to environmental changes. The disappearance of a keystone species can have far-reaching consequences, potentially disrupting the intricate balance and stability of the entire ecosystem.

Sea stars face a range of threats, including habitat loss in reef flats and seagrass habitats due to human activities such as coastal development, land reclamation, and dredging. In addition to these localized threats, the broader issue of global warming and rising temperatures poses a significant risk to sea stars as well.

Sea stars have a unique respiratory system as they do not rely on gills or lungs to breathe. Instead, they absorb oxygen through specialized structures called papulae, or skin gills, which are distributed all across their outer surface. These papulae enable the sea stars to facilitate the process of oxygen diffusion. However, a recent study conducted by Cornell University highlights that current ocean conditions have created an environment favourable for increased bacterial growth. Unfortunately, this excessive bacterial growth has led to a depletion of oxygen in the surrounding water––essentially depriving sea stars of the oxygen they need to survive. 

Image courtesy o: Joi Ito

That being said, sea stars are incredibly resilient. They possess an incredible ability to regenerate parts of their body. Even if they lose an arm or a significant portion of their body, they have the remarkable capacity to regrow those sections. As long as at least one-fifth of the central disk and one arm remain intact, the sea star can fully recover. The process of regeneration may take up to a year.

There are at least 31 species of sea stars on the shores of Singapore. Here are two more remarkable species you might be fortunate enough to spot!

Common name: Knobbly Sea Star

Scientific name: Protoreaster nodosus 

The Knobbly Sea Star, also referred to as the Chocolate Chip Sea Star, stands out as one of the largest sea stars found in Singapore, growing up to an impressive 30cm in diameter. It has distinctive brown knobs that look like chocolate chips on its body and arms. These sea stars are commonly observed in areas abundant in coral rubble. Their diet consists of a diverse range of food sources such as clams, snails, sponges, as well as organic matter such as dead plants and animals.

Image courtesy of Rob

Common name: Common Sea Star

Scientific name: Archaster typicus

The Common Sea Star, which is also known as the Sand Star, is typically found in the shallow waters of the Indo-Pacific region. Despite its name, this sea star has become increasingly rare on the shores of Singapore. With a maximum diameter of around 15cm, these sea stars usually exhibit gray or brownish colors. They prefer habitats in shallow, sheltered areas with silty or sandy substrates, often in proximity to seagrass beds and mangroves. Their diet consists of decaying plant matter as well as small creatures. One fascinating aspect about them is their ability to swiftly move using their tube feet, accomplishing speeds of up to 70cm per minute.

Image courtesy of Ria Tan

A key consideration when you spot a sea star: don’t pick it up!

You may have heard of the Starfish Story, where a man throws sea stars back into the ocean to save them. Contrary to this tale, picking up sea stars is not encouraged. Sea stars have soft and thin tissues and can become contaminated with bacteria passed on through human touch. The sunscreen or oils on our hands may also harm them.

Sea stars have a crucial dependence on seawater and have limited survival capabilities outside of their watery habitat. Notably, according to Ria Tan from Wild Singapore, if you happen to come across sea stars outside of water, they are likely alive and belong to intertidal species accustomed to enduring periods without water during low tide.

All sea stars that you see are probably alive, [since] dead sea stars disintegrate quickly and don’t leave behind whole skeletons.

Ria Tan, Wild Singapore

If you come across sea stars in the wild, we encourage you to (safely and respectfully) capture photos and document your observations. We especially recommend using the local SGBioAtlas app, or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

References and further reading:

Sea Stars – Wild Singapore

Predator Overlap Keeps Prey From Getting out of Control

The Weird and Wonderful: Dragonfly

With their voracious appetite, dragonflies help regulate the populations of insects that potentially carry diseases, reducing the need for chemical insecticides.

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In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Dragonflies

Dragonflies play a crucial role in ecosystems––their roles as predators and indicator species contribute to environmental health.

Image courtesy of: Schnobby

Dragonflies are a predatory species that eat all types of small insects­­. They primarily feed on mosquitoes, gnats, and flies. They are extremely skilful as hunters and catch up to 95% of the prey they go after–– much higher than other predators. Their impressive success rate is attributable to their exceptional flying skills, spectacular eyesight and lightning-fast neural systems. 

Dragonflies have two pair of wings that extend out horizontally at rest, much like an airplane. They can flap and beat their fore and hind wings independently and hover and fly in any direction, including backwards. They see much faster than we humans do. Each compound eye covers most of the dragonfly’s head, and allows it to see almost 360 degrees around it. Once dragonflies focus on a prey, they can predict its future location and swoop in on it with great accuracy.

Even as nymphs, baby dragonflies eat small aquatic creatures like mosquito larvae, worms, tadpoles, and even small fish!

With their voracious appetite, dragonflies help regulate the populations of insects that potentially carry diseases, reducing the need for chemical insecticides. A team of researchers from Nparks and the National University of Singapore are conducting a study on how to maximise the potential of dragonflies as natural pest control to combat dengue in Singapore. 

Image courtesy of: Schnobby

Dragonflies play a vital role as indicator species. They are highly sensitive to changes in water quality and habitat conditions, and dragonfly larvae require clean, unpolluted water to thrive. By monitoring dragonfly populations in certain areas, scientists can assess the health of aquatic ecosystems. A decline in the population or a decrease in diversity may be a sign of pollution, habitat loss, or other environmental disturbances. On the other hand, a good population of dragonflies is an indication of a healthy ecosystem. 

The presence, absence, or abundance of an indicator species reflects on a specific environmental condition. They can signal that something has changed or is going to change in the ecosystem and diagnose the health of an ecosystem.

Dragonflies also serve as an important food source for other animals including a wide range of birds, fish, frogs, and spiders. Their larvae are often prey to fishes and frogs. 

Image courtesy of: Strange Ones

According to Nparks, there are over 123 dragonfly and damselfly species in Singapore. Dragonflies and damselflies belong to same order of insects called Odonata, meaning toothed jaws. Sometimes, they are both collectively referred to as dragonflies. You can tell a dragonfly from a damselfly by looking at how its wings look like at rest. Unlike the dragonfly, whose wings rest horizontally, the damselfly’s wings fold back in line with its abdomen. Damselflies also have a thin body and smaller eyes than the dragonfly.

Common dragonfly species you may spot in Singapore:

Image courtesy of: (left) Gido, (right) Nparks Flora & Fauna Web

Common name: Crimson Dropwing

Scientific name: Trithemis aurora

The Crimson Dropwing is a common native dragonfly species that can be found in urban wetlands––in ponds and lakes. The males are a luminous fuchsia pink and females are golden yellow with black markings on the side.

Image courtesy of: (left) Renee Grayson, (right) Gail Hampshire

Common name: Blue Dasher

Scientific name: Brachydiplax chalybea

The Blue Dasher is an abundant native species. They live near still calm bodies of water and particularly like lotus ponds. The males are a chalky blue colour with a black tip at the end of its abdomen and females are black with yellow stripes along the side and top.

Image courtesy of: (left) Jeevan Jose, (right) Charles J. Sharp

Common name: Common Scarlet

Scientific name: Crocothemis servilia

The Common Scarlet is a common native species and are one of the larger red dragonflies found in Singapore. The males are red from head to tail and the female is light brown. Both males and females have a dark vertical line down the centre of their abdomen.

Image courtesy of: (left) Charles J. Sharp, (right) Green Baron

Common name: Common Parasol

Scientific name: Neurothemis fluctuans

The Common Parasol is the most common dragonfly species in Singapore. The males are reddish brown with maroon wings and transparent tips. Females are a dull brown with clear wings.

Image courtesy of: (left) Bill Higham, (right) John Tann

Common name: Yellow-barred Flutterer

Scientific name: Rhyothemis phyllis

The Yellow-barred Flutterer, also known as the Yellow-striped Flutterer, is common throughout Singapore and have been spotted far away from water. Swarms of the Yellow-barred Flutterer are often seen fluttering over grassy field in search from prey. Both males and females look similar. They are dark with a metallic sheen and have distinctive yellow and black bars on the base of their hind wings.

A key consideration when spotting dragonflies:

Watch your step near water bodies, keep your distance, and be careful not to stomp on dragonflies. The best time for dragonfly watching is from 9 am to 5 pm!

If you come across dragonflies in the wild, we encourage you to (safely and respectfully) capture photos and document your observations. We especially recommend using the local SGBioAtlas app, or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

Further reading:

Motor Control: How Dragonflies Catch Their Prey 

Enhancing the Diversity of Dragonflies in Urban Areas

The Weird and Wonderful: Saga Tree

The Saga, also known as the Lucky Red Seed or Red Bead Tree, is an iconic tree in Singapore’s landscape. It is a large tree that grows up to 20 metres tall. It belongs to the legume family and, like other legumes such as soybeans and peanuts, their seeds come in a pod.

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Deck the halls with boughs of holly, fa la la la la la 🎵 🎶

It’s holiday season! There are many traditions associated with the Christmas season. And many of these traditions involve plants. Evergreen trees are typically used as Christmas trees, poinsettias are well-liked for their red ornamental leaves, and holly adorn the halls with its bright red berries. However, it is worth noting that these plants do not thrive in tropical regions and are certainly not found in the Singapore landscape.

Saga

Common name: Saga

Scientific name: Adenanthera Pavonina

The Saga, with its lush green foliage and vibrant red seeds, resemble the holly in some ways.

Both plants have evergreen leaves, which means they retain their green colour throughout the year. The holly has red berries and spiky leaves and adds colour to the dark days of Yule. It symbolises peace and goodwill during the holiday season.

The saga is best known for its brilliant red seeds. The glossy heart-shaped seeds symbolise love in many cultures and are used as decoration or as lucky charms.

Image Courtesy of Mauricio Mercadante

In the past, saga seeds were tools used to measure silver and gold in ancient India and Sri Lanka. The seeds have a uniform weight and size: four seeds make up exactly 1 gram.

The Saga, also known as the Lucky Red Seed or Red Bead Tree, is an iconic tree in Singapore’s landscape. It is a large tree that grows up to 20 metres tall. It belongs to the legume family and, like other legumes such as soybeans and peanuts, their seeds come in a pod.

Image Courtesy of Dinesh Valke

The saga bears long curved fruit pods. When young, the fruit pods are green and nearly straight. As they mature, they transform into a woody brown colour, curl and twist, and eventually split open to reveal the striking red seeds.

Image courtesy of JNZL

The saga is native to India and Southern China , but has been naturalised in many countries in the tropics––throughout Singapore, Malaysia, Africa, Pacific and the Caribbean Islands. It is grown for forage, as a medicinal plant, or an ornamental tree in gardens and park. Its young leaves can be cooked and eaten, and the raw seeds are toxic but maybe be eaten when cooked.

Naturalised plants are plants that have been introduced to non-native environments and are able to grow and reproduce in the wild in their new home. All “alien invasive plants” or “non-native invasive species” are considered naturalised.

The saga is a common shade tree. It has a large spreading crown, and light feathery foliage, and are ideal for providing cover. It is hardy, fast growing, and easy to care for. They grew along the roadsides in Singapore during the 1970s and 1980s.

The leaves of saga trees undergo seasonal shedding for brief periods every 6-8 months, when the pale-green leaflets turn yellow and fall off. However, due to the significant amount of leaf litter and seeds they drop, saga trees have been deemed unfit for roadside locations. They can make roads messy and pose risks to motorists. Furthermore, saga trees are susceptible to damage in cases of strong winds.

Image Courtesy of Nparks Flora & Fauna Web

Today, saga trees can be found in secondary forests, but few remain in our urban landscape. Several aged saga trees have become landmarks across Singapore, and serve as symbols of historical significance.

A saga tree with Heritage Tree status is at the Singapore Botanic Gardens, near the Lady on a Hammock sculpture. It is a large tree with a girth of 4.68 metres and a height of 13.1 metres. According to Nparks, this tree is believed to be well over 100 years old. 

Image Courtesy of Nparks

You will also find a saga tree grove at Gallop Extension. Spot the larger-than-life saga seeds by Singapore-based contemporary artist Kumari Nahappan that mark the grove. Amongst the cluster of Adenanthera Pavonina saga trees, there is one much rarer native Adenanthera malayana species whose saga seeds are black and red.

Image Courtesy of Global Cultural Aliance

If you come across saga trees in the wild, we encourage you to capture photos and document your observations. We especially recommend using the local SGBioAtlas app or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

The Weird and Wonderful: Seagrass

Seagrasses are one of the most productive ecosystems in the world and are vital for climate change mitigation. Seagrass ecosystems can sequester up to twice as much carbon from the atmosphere as land forests.

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Seagrass

Seagrasses are underwater plants that are commonly found in both tropical and temperate coastal waters. Seagrass is often confused with large seaweed. Unlike seaweeds, which do not have a root system and reproduce by releasing spores, seagrasses are true flowering plants and belong to the same group of plants as land grasses and lilies. They have leaves, roots and veins, and produce flowers and seeds––the roots absorb nutrients from soft sediment and the leaves make food through photosynthesis. Seagrasses thrive in shallow, protected coastal waters with sufficient sunlight. They can exist as a few plants or clumps, but generally form dense underwater meadows.

Image credit: Ria Tan, Wild Singapore

Seagrass habitats provide crucial services such as acting as shelters and nursery areas for numerous species––including animals like seahorses and juvenile fishes of larger commercially valuable fishes and marine creatures, contributing to nutrient cycling, improving water quality, stabilising sediments for coastal protection, and playing a big part in carbon sequestration by retaining carbon within their leaves and roots.  

In addition, seagrasses support a complex food web. They serve as the primary food source for sea turtles and dugongs in our waters. Sea turtles and dugongs eat seagrasses, including the seeds of the plants, and play a role in seed dispersal as they pass the seeds through their digestive systems and excrete them. Seagrasses also indirectly contribute to the food chain by hosting microscopic algae on their leaves. Smaller animals feed on these algae and, in turn, are prey for larger animals.

Image credit: Ria Tan, Wild Singapore

Seagrasses are one of the most productive ecosystems in the world and are vital for climate change mitigation. Seagrass ecosystems can sequester up to twice as much carbon from the atmosphere as land forests. They store large amounts of carbon through photosynthesis by trapping them in their stems. And when parts of the plants die and decay, they collect on the seafloor, eventually getting buried in sediment and effectively trapping carbon for hundreds of years. Although seagrasses account for less than 0.2% of the world’s oceans, they sequester roughly 10% of the carbon stored in ocean sediment annually.

Over the past fifty years, there has been significant and widespread decline in global seagrass cover, primarily attributed to human activities such as changes in land-use, coastal changes, dredging, and declining water quality. They are among the world’s most threatened ecosystems, experiencing an annual loss of approximately 1.5%. and accelerating in recent decades. It is estimated that at least 29% of the global coverage of seagrass meadows have been lost. The ecosystem services they provide make seagrasses a high conservation priority.

Seagrasses were previously abundant on Singapore’s shores, but their diversity and extent were never rigorously documented until recently. There are three major seagrass meadows in Singapore. They are at Chek Jawa Wetlands, Pulau Semakau, and Cyrene Reef.

Locations where seagrass (including total number of species) has been reported from around Singapore.

Image credit: McKenzie et al, 2016

There are about 72 different seagrass species in the world. These are some of the species that are found in Singapore.

Common name: Tape Seagrass

Scientific name: Enhalus acoroides

Tape Seagrasses have long ribbon-like leaves that can grow up to 150cm long. They are often found close to mangrove forests. Tape Seagrasses are abundant at Pulau Semakau and Cyrene Reef.

Image credit: Ria Tan, Wild Singapore

Common name: Smooth Ribbon Seagrass

Scientific name: Cymodocea rotundata

Smooth Ribbon Seagrasses have flat narrow leaves that look like straps with a smooth rounded leaf tip.

Image credit: Ria Tan, Wild Singapore

Common name: Serrated Ribbon Seagrass

Scientific name: Cymodocea serrulata

Serrated Ribbon Seagrasses have a similar shape as Smooth Ribbon Seagrasses, with slightly wider leaves and a serrated leaf tip instead.

Image credit: Ria Tan, Wild Singapore

Common name: Sickle Seagrass

Scientific name: Thalassia hemprichii

Sickle Seagrasses have hooked curved-shaped leaves with short black bars on its leaf blade.

Image credit: Ria Tan, Wild Singapore

Common name: Noodle Seagrass

Scientific name: Syringodium isoetifolium

As its common name suggests, Noodle Seagrasses mimic spaghetti. The leaves are cylindrical and grow up to 30cm long.

Image credit: Ria Tan, Wild Singapore

Common name: Needle Seagrass

Scientific name: Halodule uninervis

Needle Seagrasses are long and narrow with a leaf tip resembling the letter “W”. They are the preferred food for Dugongs.

Image credit: Ria Tan, Wild Singapore

Common name: Fern Seagrass

Scientific name: Halophila spinulosa

Fern seagrasses look like… ferns! Tiny leaves are arranged in opposite pairs, and the “fronds” grow up to 15cm long. They can be found at Check Jawa.

Image credit: Ria Tan, Wild Singapore

Common name: Hairy Spoon Seagrass

Scientific name: Halophila decipiens

Hairy Spoon Seagrasses have small oval leaves and leaf hairs on both sides of the leaves. They were discovered on Singapore shores only in 2007.

Image credit: Ria Tan, Wild Singapore

A key consideration when visiting seagrass meadows:

The roots and rhizomes (underground stems) of seagrass are often buried in sand or mud. When trampled on, the underground stems can damage and take a long time to recover. So keep off the seagrass!

Join a conservation initiative!

Consider becoming a part of Team Seagrass–– a volunteer team working in collaboration with the National Biodiversity Centre of the National Parks Board and Seagrass-Watch. Help contribute to the monitoring of seagrasses along Singapore’s shores!

If you come across seagrass in the wild, we encourage you to (safely and respectfully) capture photos and document your observations. We especially recommend using the local SGBioAtlas app, or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

References and further reading:

🌱 What are seagrasses? (Team SeaGrass)

🌱 Seagrasses on the Shores of Singapore (Wild Singapore)

📄 The Diversity And Distribution Of Seagrass In Singapore

📄 Seagrass habitats of Singapore: Environmental Drivers and Key Processes

The Weird and Wonderful: Hornbill

Hornbills, also known as forest farmers, play a vital ecological role in their natural habitats, particularly in tropical and subtropical regions. This nickname aptly describes their significant contribution to the spread and germination of seeds, especially those from big-fruited forest trees.

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Hornbills

Hornbills, also known as forest farmers, play a vital ecological role in their natural habitats, particularly in tropical and subtropical regions. This nickname aptly describes their significant contribution to the spread and germination of seeds, especially those from big-fruited forest trees. There are around 60 species of hornbills found in Africa and Asia.

These large black and white birds with contrasting-coloured beaks are not to be mistaken for toucans. Hornbills and toucans are both tropical fruit-eating birds and do the same job of spreading seeds to keep forests healthy, but their similarities end there. Most hornbills have a distinctive beak feature called a casque.

Image Courtesy of Francis Yap via Birds of Singapore

Three species of hornbill are believed to be native to Singapore––the Oriental Pied Hornbill, Rhinoceros Hornbill, and Helmeted Hornbill. These birds flourished in the 1800s, but gradually disappeared from the landscape to the point of local extinction, falling victim to hunting, habitat loss due to deforestation, and other human activities.

In 1994, a pair of wild Oriental Pied Hornbill, believed to be visitors from Malaysia, was spotted at Pulau Ubin. Later on, the first local breeding was observed in 1997.

Image Courtesy of Francis Yap via Birds of Singapore

Hornbills nest in suitable holes in a tree. When a female hornbill is ready to lay eggs, she seals the entrance with mud, fibres, and regurgitated fruit delivered to her by the male. She leaves a narrow opening through which the male brings food to her and their young and breaks out only after a few months when the nestlings are fully fledged.

Natural tree holes for nesting are limited in Singapore’s natural environment. In an effort to encourage wild hornbills to breed, over 20 artificial nest-boxes were installed within trees all over Singapore. Since their re-introduction, Oriental Pied Hornbills have multiplied and thrived in Singapore. They are the only true wild hornbills in Singapore.

Image courtesy of Hiyashi Haka

Common name: Oriental Pied Hornbill

Scientific name: Anthracoceros albirostris

The Oriental Pied Hornbill is a medium-sized hornbill with mostly black plumage with a distinctive white patch on its face, a pale yellowish bill and a small casque. Females have a smaller bill. It mainly feeds on fruit but also prey on small animals, such as small birds and reptiles. 

They can be found in wooded areas, forest edges, mangroves, gardens, and parks around Singapore. Most Asian hornbills require large areas of forest to survive, but the Oriental Pied Hornbill has demonstrated an ability to adapt to urban environments, making use of the remaining patches of forests within the city. They have been spotted in urban areas that border green spaces and can tolerate a moderate level of human presence and activity. Their population is currently stable and is not a concern on the IUCN Red List of Threatened Species.

Visitors spotted in Singapore

Non-breeding wild visitors from neighbouring countries have been sighted on our shores and offshore islands. It is suggested that the degradation of regional forests is driving these species to search for new suitable habitat. They include the White-crowned Hornbill and the Black Hornbill.

Common name: White-crowned Hornbill

Scientific name: Berenicornis comatus

For the first time this year, a female White-crowned Hornbill was sighted on Pulau Ubin. It is a large hornbill with a bushy, upright white crest and a white tail. Males are white from the head down to the belly, and females are predominantly black, with only a white crest. It is listed as Endangered on the IUCN Red List of Threatened Species.

Image Courtesy of Zhang Shubo (Kiri) via Birds of Singapore

Common name: Black Hornbill

Scientific name: Anthracoceros malayanus

The Black Hornbill is a medium-sized hornbill with black plumage and broad white tips on its outer tails. Males have a pale yellow bill and casque; and females have a black bill and casque. It has been spotted within Woodlands and on Pulau Ubin. It is listed as Vulnerable on the IUCN Red List of Threatened Species.

Image courtesy of GerifalteDelSabana

Some of these insights into the population and distribution of the Oriental Pied Hornbill attributed to data from eBird and iNaturalist, collected and submitted by the community. You, too, can contribute to research by providing valuable data.

If you come across hornbills in the wild, we encourage you to (safely and respectfully) capture photos and document your observations. We especially recommend using the local SGBioAtlas app, the eBird app, or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

References and further reading:

📗 Conserving Hornbills in the Urban Environment

📃 A Note on Oriental Pied Hornbill reintroduction in Singapore and its dispersal from 2010–2021

📄 Aberrant Behaviour Of A Female Great Hornbill And A Female Rhinoceros Hornbill

Sustainable Packaging in Singapore: Opportunities and Challenges

As Singapore moves towards a sustainable future, addressing packaging waste will be crucial in achieving its net zero goals. The study underscores the importance of collaborative efforts between different stakeholders for long-term success. Recommendations include a focus on consumer education, government incentives, and innovative business models.

cover-photo

In 2021, Singapore generated 1.82 million tonnes of domestic waste that needed to be incinerated. Almost one-third of it was domestic packaging waste, accounting for 523,000 tonnes (valued at S$1.8 billion), and incineration of the packaging waste alone generated over 3.15 million kilograms of carbon dioxide equivalent (KgCO2e).

Identifying packaging waste as one of Singapore’s primary waste streams, the Singapore Environment Council (SEC) conducted a study, Unlocking Sustainable Packaging Opportunities in Singapore, in collaboration with KPMG in 2022 to assess the state of sustainable packaging, consumer attitudes, and opportunities for effective packaging waste management to realise Singapore’s vision of getting to net zero and closing the loop for packaging waste.  

The study surveyed over 1,000 respondents from diverse socio-economic backgrounds to understand how packaging is used in Singapore, people’s awareness of eco-labelling, and perceptions of stakeholder roles in sustainable packaging.

Key Findings

Public Awareness and Education

  • 7 out of 10 consumers lack a full understanding of what materials are recyclable and what are not.
  • 78% cited the absence of insufficient information and clear labelling on sustainable packaging as a hindrance to making sustainable choices.
  • Consumers also view the effort needed to wash and clean recyclables for recycling as the biggest challenge to recycling.

Challenges and Opportunities for Businesses

  • 95% of the respondents expressed a willingness to choose products with sustainable packaging, while price was a significant factor, with 53% stating they would only opt for sustainable packaging if it didn’t cost more.
  • 70% believed there should be a reduction in packaging material for most products.
  • 27% cited a willingness to use refillable bottles if they could cut down on costs.
  • Over half of the respondents would take part in take-back schemes if collection points were convenient and accessible across Singapore.  

Stakeholder Roles

  • Consumers rely on the Singapore government (29%) and corporates (22%) to implement and provide credible sources of information about eco-friendly packaging.
  • More educational campaigns, better recycling infrastructure, and compulsory eco-labelling are solutions deemed helpful for consumers to manage their packaging waste better.

diagram from SEC

Recommendations:

  • The study highlighted an urgent need for businesses to explore sustainable packaging options, presenting opportunities for cost savings.
  • Upstream players, such as manufacturers and suppliers, can play a pivotal role in redesigning packaging and reducing material use.
  • Businesses should collaborate with the government, supply chains, and consumers to address the carbon footprint across the product life cycle.
  • Government incentives, including tax relief and research grants, are crucial to supporting businesses in adopting sustainable practices.

As Singapore moves towards a sustainable future, addressing packaging waste will be crucial in achieving its net zero goals. The study underscores the importance of collaborative efforts between different stakeholders for long-term success. Recommendations include a focus on consumer education, government incentives, and innovative business models.

Read the full report here.

Educational

Our Educational Articles cultivate environmental awareness. Gain insights into both local and global issues affecting Kenya’s ecosystem, and discover fascinating facts about the native flora, fauna, and wildlife. We aim to inform, inspire, and foster a deeper understanding of the environmental challenges and successes in the region.

Our Educational Articles cultivate environmental awareness.

Gain insights into both local and global issues affecting Kenya’s ecosystem, and discover fascinating facts about the native flora, fauna, and wildlife. We aim to inform, inspire, and foster a deeper understanding of the environmental challenges and successes in the region. 

The Weird and Wonderful: Mangrove

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Mangroves

Mangroves are a group of shrub and tree species that live along shores, rivers, and estuaries in the tropics, subtropics, and even some temperate coastal areas. Although used to describe the species, plant, or forest, the term mangrove is also commonly used collectively to describe the unique ecosystem these plants form.

Image courtesy of Cattan2011

These inter-tidal forests, comprising salt-tolerant trees featuring a partially exposed network of roots, are possibly the world’s most productive type of wetland. They provide shelter and food for an immense diversity of wildlife. They physically protect coastlines. They provide sustenance, raw materials, and medicine to communities who continue to depend on the land for their livelihoods. They are extremely resilient and are able to withstand the worst of storms, hurricanes, and flooding. 

During high tide, the roots of mangrove plants are completely submerged in seawater. And during low tide they are exposed to the sun. While the distinctive roots of mangroves play a crucial role in facilitating the respiration of these plants, their significance extends beyond that singular function.

Mangrove root systems provide a safe haven for fish fry and juvenile animals and host a variety of species, including mudskippers, otters, and water monitor lizards.

Image courtesy of Ravenblack7575

Their roots act as natural filters, trapping sediments and pollutants, and enhancing water quality. They protect marine life, and provide a natural buffer against storm surges and coastal erosion.

Image courtesy of Eustaquio Santimano

In the current era where climate change is a pressing concern, mangrove forests stand out for their remarkable ability to efficiently sequester carbon, trapping significant amounts of carbon dioxide by storing carbon in their biomass and the surrounding soil. 

However, the combined impacts of rising sea levels and activities such as agriculture, aquaculture, urban development, and harvesting have resulted in the erosion and deforestation of mangrove forests, causing the loss of more than a quarter of these vital ecosystems in the past 50 years. In the 1820s, mangroves accounted for 13 percent of Singapore’s land area. Today, less than 1 percent of the mangroves in Singapore remain.

Approximations suggest that Singapore’s remaining mangrove patches may store 450,570.7 megagrams of carbon, an equivalent to the average annual carbon emissions of 621,000 residents. 

The most extensive expanse of mangrove area on mainland Singapore is loacted within Sungei Buloh Wetlands Reserve. They can also be found within areas such as Mandai, Labrador Nature Reserve, and Pasir Ris Park, as well as offshore islands like Pulau Semakau and Pulau Ubin. 

Image courtesy of Eustaquio Santimano

There are about 35 mangrove species found in Singapore, here are a few to look out for: 

Images courtesy of Zairon (left), Nparks Flora Fauna Web (right)

Common name: Bakau Minyak 

Scientific name: Rhizophora apiculata

The Bakau Minyak is one of the two most common mangrove species in Singapore and native to Singapore. They have the potential to grow upwards of 30 metres or more. Boasting a smooth dark grey bark that can reach up to 50cm in diameter, the bakau minyak is distinguished by its characteristic arching prop or stilt roots connected to the trunk, along with aerial roots emerging from its branches. 

Images courtesy of Nparks Flora & Fauna Web

Common name: Bakau Putih, Black Mangrove

Scientific name: Bruguiera cylindrica

The Bakau Putih, also known as Black Mangrove, is another common mangrove species and native to Singapore. These mangroves can reach heights of up to 20 meters but are frequently spotted on nature trails as compact shrubs or modest trees ranging from 2 to 3 meters in height. The trees have a greyish bark and are notably recognised for their lateral roots that stick out from the mud surface, bearing a resemblance to a person’s bent knees.

Image courtesy of Nparks Flora & Fauna Web

Common name: Nipah Palm, Water Coconut, Mangrove Palm, Attap

Scientific name: Nypa fruticans

You may already be familiar with this plant based on your knowledge of a popular local dessert. Ice kacang is a local favourite of red beans, creamed corn, grass jelly and the gem of all gems––attap chee, topped with a mountain of ice drizzled with gula melaka. Attap chee is the fruit of the nipah palm. And gula melaka (palm sugar) is made from its sap. The Nipah Palm is a mangrove palm native to Singapore. It is a medium to large-sized stemless palm that frequently grows in small clumps, characterized by its expansive leaf fronds.

If you come across mangroves in the wild, we encourage you to capture photos and document your observations. We especially recommend using the local SGBioAtlas app or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

The Weird and Wonderful: Otter

Otters are highly social creatures and like to forage and travel in groups of up to twelve or more. They are also incredibly resilient. In Singapore, the smooth-coated otter has adapted well to our urban cityscape.

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Otters

In recent years, Singapore has seen a rise in otter sightings. Once on the brink of local extinction, these critically endangered creatures are now thriving.

Otters can be found in wetlands, mangrove forests, rivers, lakes, and rice paddies. They find shelter in mangroves, where they breed and hunt for an array of prey. However, pollution and habitat loss from the decline of mangroves due to deforestation threatened their survival in the 1970s. 

When Singapore started its greening movements, cleaning up its waterways in the 1980s, expanding conservation efforts, and integrating more green and blue spaces within urban areas in 2001, the otter population rebounded. 

Image Courtesy of Vicki Burton

You can find two otter species in Singapore—the small-clawed otter and the smooth-clawed otter. They are both listed as Vulnerable on the IUCN Red List of Threatened Species. In certain regions of Asia, these otters face the threat of poaching for their skins. The ongoing illegal trade further threatens the species. 

Image courtesy of JJ Harrison

Common name: Smooth-coated Otter

Scientific name: Lutrogale perspicillata 

The smooth-coated otter is most common species in Singapore. They are the largest otter in Southeast Asia and have a distinctive smooth, velvety coat. They forage for larger fish most of the time. Their also feed on crabs, shrimp, mudskippers, frogs, and birds. They are regularly seen at Sungei Buloh Wetland Reserve but have been spotted in locations like Singapore Botanic Gardens, Marina Bay, Bishan-Ang Mo Kio Park, and reservoirs. According to Nparks, there currently about 170 smooth-coated otters island wide. 

Image Courtesy of Burgers’ Zoo

Common name: Small-clawed Otter

Scientific name: Aonyx cinerea

The small-clawed otter is more elusive and mainly found in off-shore islands such Pulau Ubin and Pulau Tekong. It is the smallest species of all 13 species of otters found around the world. As their name implies, they have very small claws that don’t extend beyond their webbed feet. They have brown to light brown fur and a pale chest, throat, cheeks and chin. They primarily feed on crustaceans and molluscs like crabs and snails but will also eat small fish, insects, frogs, bird eggs and other small aquatic animals. 

Image courtesy of Mibby23

Otters are highly social creatures. They use body language and touch, smells, and calls to communicate. And they like to forage and travel in groups of up to twelve or more. They are also incredibly resilient. In Singapore, the smooth-coated otter has adapted well to our urban cityscape. They have been seen using concrete and grass for grooming, and choosing small gaps and crevices under bridges as resting sites or dens. 

Living in a city where nature intertwines with urban life through parks and water bodies, we must learn to live alongside with wildlife. How can we share our rivers, reservoirs, and coastal wetlands with the otters? 

What to do when you encounter otters? 

(Animal Advisory, Nparks)

  • Keep your hands to yourself. Do not touch, chase or corner the otters. They may look cute, but they are carnivores with sharp teeth (remember the otter in Zootopia?).
  • Observe them from a distance. Getting too close to the otters may frighten them.
  • Keep your snacks to yourself. Do not feed the otters. They have food in the natural environment. And their eating habits keep the ecosystem balanced and healthy. 
  • Pick up any trash you see. Do not litter or leave any sharp objects in the water. Clean and safe waterways filled with fish make healthy habitats for the otters to swim and feed in.

Image courtesy of © CEphoto, Uwe Aranas

If you come across otters in the wild, we encourage you to (safely) capture photos and document your observations. We especially recommend using the local SGBioAtlas app or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.

Recommended resources:

📗 International Union for Conservation of Nature, Otter Report

👀 How to keep otters out of your home?

🦦 Our Wild Neighbours

The Weird and Wonderful: Mangrove

In the current era where climate change is a pressing concern, mangrove forests stand out for their remarkable ability to efficiently sequester carbon, trapping significant amounts of carbon dioxide by storing carbon in their biomass and the surrounding soil.

cover-photo

In this series, we showcase the diversity of rare, peculiar, and fascinating native flora and fauna in Singapore. We enthusiastically invite you to explore our nature reserves and gardens, urging you to pause and observe your surroundings—whether by looking up or down—to see if you can catch a glimpse of these unique wonders.

Mangroves

Mangroves are a group of shrub and tree species that live along shores, rivers, and estuaries in the tropics, subtropics, and even some temperate coastal areas. Although used to describe the species, plant, or forest, the term mangrove is also commonly used collectively to describe the unique ecosystem these plants form.

Image courtesy of Cattan2011

These inter-tidal forests, comprising salt-tolerant trees featuring a partially exposed network of roots, are possibly the world’s most productive type of wetland. They provide shelter and food for an immense diversity of wildlife. They physically protect coastlines. They provide sustenance, raw materials, and medicine to communities who continue to depend on the land for their livelihoods. They are extremely resilient and are able to withstand the worst of storms, hurricanes, and flooding. 

During high tide, the roots of mangrove plants are completely submerged in seawater. And during low tide they are exposed to the sun. While the distinctive roots of mangroves play a crucial role in facilitating the respiration of these plants, their significance extends beyond that singular function.

Mangrove root systems provide a safe haven for fish fry and juvenile animals and host a variety of species, including mudskippers, otters, and water monitor lizards.

Image courtesy of Ravenblack7575

Their roots act as natural filters, trapping sediments and pollutants, and enhancing water quality. They protect marine life, and provide a natural buffer against storm surges and coastal erosion.

Image courtesy of Eustaquio Santimano

In the current era where climate change is a pressing concern, mangrove forests stand out for their remarkable ability to efficiently sequester carbon, trapping significant amounts of carbon dioxide by storing carbon in their biomass and the surrounding soil. 

However, the combined impacts of rising sea levels and activities such as agriculture, aquaculture, urban development, and harvesting have resulted in the erosion and deforestation of mangrove forests, causing the loss of more than a quarter of these vital ecosystems in the past 50 years. In the 1820s, mangroves accounted for 13 percent of Singapore’s land area. Today, less than 1 percent of the mangroves in Singapore remain.

Approximations suggest that Singapore’s remaining mangrove patches may store 450,570.7 megagrams of carbon, an equivalent to the average annual carbon emissions of 621,000 residents. 

The most extensive expanse of mangrove area on mainland Singapore is loacted within Sungei Buloh Wetlands Reserve. They can also be found within areas such as Mandai, Labrador Nature Reserve, and Pasir Ris Park, as well as offshore islands like Pulau Semakau and Pulau Ubin. 

Image courtesy of Eustaquio Santimano

There are about 35 mangrove species found in Singapore, here are a few to look out for: 

Images courtesy of Zairon (left), Nparks Flora Fauna Web (right)

Common name: Bakau Minyak 

Scientific name: Rhizophora apiculata

The Bakau Minyak is one of the two most common mangrove species in Singapore and native to Singapore. They have the potential to grow upwards of 30 metres or more. Boasting a smooth dark grey bark that can reach up to 50cm in diameter, the bakau minyak is distinguished by its characteristic arching prop or stilt roots connected to the trunk, along with aerial roots emerging from its branches. 

Images courtesy of Nparks Flora & Fauna Web

Common name: Bakau Putih, Black Mangrove

Scientific name: Bruguiera cylindrica

The Bakau Putih, also known as Black Mangrove, is another common mangrove species and native to Singapore. These mangroves can reach heights of up to 20 meters but are frequently spotted on nature trails as compact shrubs or modest trees ranging from 2 to 3 meters in height. The trees have a greyish bark and are notably recognised for their lateral roots that stick out from the mud surface, bearing a resemblance to a person’s bent knees.

Image courtesy of Nparks Flora & Fauna Web

Common name: Nipah Palm, Water Coconut, Mangrove Palm, Attap

Scientific name: Nypa fruticans

You may already be familiar with this plant based on your knowledge of a popular local dessert. Ice kacang is a local favourite of red beans, creamed corn, grass jelly and the gem of all gems––attap chee, topped with a mountain of ice drizzled with gula melaka. Attap chee is the fruit of the nipah palm. And gula melaka (palm sugar) is made from its sap. The Nipah Palm is a mangrove palm native to Singapore. It is a medium to large-sized stemless palm that frequently grows in small clumps, characterized by its expansive leaf fronds.

If you come across mangroves in the wild, we encourage you to capture photos and document your observations. We especially recommend using the local SGBioAtlas app or the iNaturalist app, which enables you to share and validate your findings within the community.

Discover the wonders of nature, observe the intricacies of the world around you, and let curiosity be your guide. Happy exploring!

📷 Post your findings on social media and tag us on Instagram or Facebook.