Biodiversity Assessment of Freshwater Shrimps and Crabs in the Nee Soon Swamp Forest, Singapore

Cai, Yong; Li, Tianjiao; Lim, W.H.; Tok, Caroline; Woo, Chia Mun

doi:10.1007/978-3-319-42527-6_14

Cited by 3 publications

(5 citation statements)

References 13 publications

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“…Two amphidromous species ( M. neglectum and M. rosenbergii ) were found exclusively in oil palm plantation streams, albeit in relatively low numbers in this study, suggesting that there may be connectivity between those oil palm streams and estuarine areas. The persistence of some native shrimps in degraded habitats therefore probably reflects their tolerance of various land‐use changes (Pérez‐Reyes, Crowl & Covich, 2016) and an ability to exploit resources within modified habitats (Chong & Khoo, 1987; Cai et al, 2016; Khoo et al, 2019). This ability may be explained by the generalist/adaptive feeding behaviour of some Macrobrachium species (March & Pringle, 2003; Snyder, Small & Pringle, 2015), allowing them to maintain their diets in similar fashion to meso‐predators such as fish (Wilkinson et al, 2021).…”

Section: Discussionmentioning

confidence: 99%

Forest conversion adversely affects native Macrobrachium shrimp assemblages in tropical Malaysian streams

Gan

Tan

Ahmad

et al. 2022

Aquatic Conservation

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1. Commodity-driven forest conversion represents one of the most severe threats to freshwater biodiversity in Southeast Asia, notably causing population declines and the extinction of freshwater fish species.2. Although a variety of freshwater taxa are likely to be adversely affected by forest conversion, little is known about the impact on ecologically and economically important invertebrates such as decapod crustaceans.3. This study evaluated the impact of forest conversion and land-use change on freshwater Macrobrachium shrimp species, using species richness, abundance, and environmental data collected from 20 streams across southern Peninsular Malaysia.Streams were located in three types of landscape: forest; oil palm plantation; and mixed land use, comprising young secondary forest, small-scale plantations, patches of open and sparsely vegetated areas, and agricultural fields and clearings.4. Generalized linear models showed that even incomplete change from forest habitats to mixed land use and oil palm plantation resulted in significantly lower Macrobrachium native species richness and higher non-native species abundance.Native species richness was positively correlated with canopy cover, leaf litter, substrate size, and dissolved oxygen, and was negatively correlated with water temperature and conductivity. Native species richness was also negatively correlated with non-native species abundance, with non-native species abundance increasing along the human disturbance gradient.5. These results highlight the need for riparian habitat protection to conserve native Macrobrachium and limit the spread of non-native species. A management priority should be to maintain or restore optimum instream habitat conditions for shrimps, which would also benefit fish and other benthic macroinvertebrates. Suitable riparian management requires substantial support and funding from multiple stakeholders, but it can be aligned with other catchment-based strategies to optimize the use of limited resources available for freshwater biodiversity conservation.

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Section: Discussionmentioning

confidence: 99%

Forest conversion adversely affects native Macrobrachium shrimp assemblages in tropical Malaysian streams

Gan

Tan

Ahmad

et al. 2022

Aquatic Conservation

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“…Macrobrachium malayanum is the most abundant and widespread species found in the forest streams of Singapore's nature reserves and tropical Southeast Asia, and it is not surprising that this trend is similar for sites in BTNR (Ng, 1997;Cai et al, 2004;Wowor et al, 2004). This wide distribution is likely due to the wide environmental parameters that M. malayanum can tolerate, such as a wide pH and canopy cover range (Chong & Khoo, 1987;Cai et al, 2016;Ho et al, 2016).…”

Section: Discussionmentioning

confidence: 99%

“…Freshwater decapod crustaceans comprising freshwater crabs, shrimps (a common term used interchangeably with 'prawns'), and crayfish serve important ecological functions. These functions include acting as food sources for predators, mediators of nutrient cycling via facilitating macro-decomposition of leaf litter, influencing primary production, and influencing benthic stream communities (Cai et al, 2007;Esser et al, 2008;Cai et al, 2016). In Singapore, a total of 21 extant native freshwater decapod species (six freshwater crab and 15 freshwater shrimp species), have been recorded (Ng, 1997;Cai et al, 2007;Chua et al, 2015;Cai et al, 2016;Cai, pers.…”

Section: Introductionmentioning

confidence: 99%

The freshwater decapod crustaceans of Bukit Timah Nature Reserve, Singapore

Khoo¹,

Tiong²,

Li³

et al. 2019

GBS

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Freshwater decapod crustaceans serve important ecological functions in tropical stream ecosystems. Stream surveys for decapod crustacean fauna were conducted between February 2015 and April 2016 at nine sites in Bukit Timah Nature Reserve (BTNR). A total of eight species (four freshwater crab, three freshwater shrimp and one crayfish species) out of the nine species known from BTNR were recorded. In general, the species were recorded from sites matching environmental conditions previously known or reported for each species, with some crab species showing minor overlap in their spatial distributions. This highlights the importance of broad-based conservation efforts focusing on the entire stream network in BTNR rather than on specific/selected streams as the various species each appear to have largely unique habitat requirements. The updated information on freshwater decapod crustaceans in BTNR can be used to inform the formulation of conservation and management measures including the establishment of monitoring programs for the protection of our native and threatened aquatic fauna in BTNR.

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“…This species can be found in areas ranging from southern Thailand, Peninsular Malaysia, Singapore, Sarawak, to Sumatera (Cai et al, 2004;Liu et al, 2007;Ng and Choy, 1990;Purnamasari et al, 2016). The distribution is likely to be affected by the environmental parameters that is tolerated by M. Malayanum, such as canopy cover and water pH levels (Cai et al, 2016;Ho et al, 2016). Limiting factors that influence the presence of freshwater prawns include environmental quality, habitat characteristic, and riparian conditions.…”

Section: Introductionmentioning

confidence: 99%

“…Freshwater decapod crustaceans such as M. malayanum serve several important ecological functions, such as providing food source for predators, mediating nutrient cycles (facilitating macrodecomposition of wood litter, leaf litter, etc), influencing primary production, and influencing http://jurnal.unsyiah.ac.id/AJAS benthic stream communities (Cai et al, 2007;Cai et al, 2016;Esser et al, 2008). In general, the Senggarang Water Flow is short and shallow with clear, moderately flowing waters and considerable canopy coverage.…”

Section: Introductionmentioning

confidence: 99%

Length-weight relationship and environmental parameters of Macrobrachium malayanum (J. Roux, 1935) in Senggarang Water Flow, Tanjungpinang City, Riau Islands, Indonesia

Muzammil¹,

Apriadi²,

Melani³

et al. 2019

Aceh J. Anim. Sci.

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Macrobrachium malayanum (J. Roux, 1935) is a freshwater prawn occuring in Senggarang Water Flow, Tanjungpinang City, Riau Island, Indonesia. Least concern (LC) status of the IUCN red list threatened species and limited research about this species in Senggarang Water Flow cause this basic research is important to do. The objectives of the study were to examine the length-weight relationship of the M. malayanum in Senggarang Water Flow, Tanjungpinang City, Riau Island Province, Indonesia. A total of 84 samples were used in this study consist of 32 samples in February and 52 samples in April. Length-weight relationship of M. malayanum in February was W= 0.093TL1.425 (R2 = 0.59) and W=0.052TL2.195 (R2 = 0.75). Samples in February and April showed negative allometric growth. A temporal analysis of the negative allometric in b value showed in April (2.195) more larger than February (1.425). Environmental parameters such as temperature, current, dissolved oxygen, pH, salinity, nitrate, and phospate are still appropriate condition. M. malayanum found in substrate type slightly gravelly sand and gravelly sand.

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Biodiversity Assessment of Freshwater Shrimps and Crabs in the Nee Soon Swamp Forest, Singapore

Cited by 3 publications

References 13 publications

Forest conversion adversely affects native Macrobrachium shrimp assemblages in tropical Malaysian streams

Forest conversion adversely affects native Macrobrachium shrimp assemblages in tropical Malaysian streams

The freshwater decapod crustaceans of Bukit Timah Nature Reserve, Singapore

Length-weight relationship and environmental parameters of Macrobrachium malayanum (J. Roux, 1935) in Senggarang Water Flow, Tanjungpinang City, Riau Islands, Indonesia

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