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Nee Soon freshwater swamp forest is the last remaining primary freshwater swamp forest left in Singapore and it contains a rich diversity of native and locally threatened fauna. As native terrestrial snails and slugs are poorly studied and understood in Nee Soon freshwater swamp forest, an extensive survey was conducted to establish their current s...
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Context 1
... Species Richness (R) indicates the average number of species present at each of the survey sites (Fig. 4). Based on the table above, Lower Swamp 1 had the highest species richness (R=4.5) and Upper Swamp 2 had the lowest species richness (R=0.33). The number of non-native snails recorded in the Outskirts distorts the species richness value ...
Context 2
... Species Richness (R) indicates the average number of species present at each of the survey sites (Fig. 4). Based on the table above, Lower Swamp 1 had the highest species richness (R=4.5) and Upper Swamp 2 had the lowest species richness (R=0.33). The number of non-native snails recorded in the Outskirts distorts the species richness value ...
Citations
... Further, the catchment contains Nee Soon freshwater swamp forest, which as the last remaining intact freshwater swamp forest in Singapore is of critical conservation value (Corlett, 1997;Ng and Lim, 1992;Wee and Ng, 1994;Cai et al., 2018;Clews et al., 2018). Recent studies have found several endemic species in Nee Soon including Parathelphusa reticulata (Yeo et al., 2010;Cai et al., 2016), Irmengardia johnsoni (Ng and Yang, 1985;Ho et al., 2016;Cai et al., 2016), Syzygium pseudocrenulatum (rediscoveries) (Chong et al., 2018), Amphidromus atricallosus temasek (Tan et al., 2011;Lim et al., 2018). ...
... Ho et al. (2018) describe the aquatic macrofauna. Lim et al. (2018) list the molluscs of Nee Soon, and Cai et al. (2018a) the odonates, in the terrestrial and aquatic domains. Kutty et al. (2018) describe the use of next generation sequencing to forge the links between field identifications and image databases of the freshwater swamp forest flora and fauna. ...
... While most feed on plant matter or are scavengers, some gastropods are predators instead . Terrestrial snails and slugs from the Nee Soon freshwater swamp forest have been surveyed by Lim et al. (2018). ...
... 2) Faunal identifications: Nee Soon freshwater swamp forest was extensively surveyed by Faunal Ecology teams Lim et al., 2018) who collected a large number of specimens. We imaged these specimens using specialised digital camera systems and sequenced the COI barcode for these specimens using Sanger sequencing and NGS. ...
... In addition, the material that was collected during the project continues to be studied and new species are found and imaged every week. The Faunal Ecology teams extensively surveyed the aquatic habitats and collected a large number of specimens Lim et al., 2018). Because the processing of these samples was time-consuming, we only obtained them fairly late. ...
... The Nee Soon hydrology and biodiversity project was a response to the need for better understanding of the forest ecosystem and its dynamic processes, as a basis for management and monitoring (Davison et al., 2018). A detailed but still in many respects preliminary review of the results has been given in the accompanying papers in this same volume Chong et al., 2018;Clews et al., 2018;Ho et al., 2018;Kutty et al., 2018;Lim et al., 2018;Nguyen et al., 2018;Sun et al., 2018). ...
... 1 Establish the status of Nee Soon freshwater swamp forest in terms of vegetation hydrology and aquatic biodiversity 1. Literature Review of freshwater swamp forest literature and research on the Nee Soon freshwater swamp forest updated (Tan et al., 2013;Clews et al., 2018); new results derived from this project presented on vegetation (Chong et al., 2018), fauna Li et al., 2016;Ho et al., 2018;Lim et al., 2018) and cryogenics (Kutty et al., 2018). ...
... The geodatabase is the native data structure for ArcGIS and is the primary data format # Aims Achievements 9 Publish work on swamp forest ecology and the development of ecohydrological models in international, peerreviewed scientific journals So far, one guide book (Ho et al., 2016), one book chapter , nine journal papers (Neo et al., , 2017Sun et al., 2015Sun et al., , 2016Chong et al., 2016;Li et al., 2016;Lim et al., 2016;Tan et al., 2016;Wendi et al., 2016) and 18 conference papers have been published. Another eight papers have been accepted for publication Chong et al., 2018;Clews et al., 2018;Ho et al., 2018;Kutty et al., 2018;Lim et al., 2018;Nguyen et al., 2018;Sun et al., 2018). used for editing and data management. ...
The current paper acts as a summary to the “Nee Soon Swamp Forest biodiversity and hydrology baseline studies project”, including results published previously and the results from papers of the current volume. Overall, flora and fauna surveys indicate healthy and diverse plant, fish and aquatic macroinvertebrate communities in Nee Soon freshwater swamp forest. There are some concerns over terrestrial and aquatic alien invasive species, loss of big emergent trees, small population sizes and viability of various native species, and the uncertain outcomes of changes in water quality and quantity. The findings inform management that Nee Soon freshwater swamp forest is especially vulnerable to changes in hydrology and there is much dependency on precipitation for its water budget. Projected climate change effects on precipitation and statistical analyses of biotic responses to hydrology clearly define drought as a major, perhaps the foremost, source of vulnerability to the ecosystem functioning of Nee Soon freshwater swamp forest. Potential management solutions are suggested to address five issues of concern for the forest: hydrological integrity, erosion and sedimentation, ecological integrity, the impact of the spillway, and impacts of construction and development.
The terrestrial and freshwater malacofauna of southern Bahia is little known, especially in comparison to the well-studied eastern portion of the state covered by remnants of Atlantic Forest. We present here a synopsis of all gastropod species known from the central southern region of Bahia state, known as 'Centro-Sul Baiano' , focusing on four municipalities: Condeúba, Cordeiros, Mortugaba, and Piripá. The list herein contains data from the literature, historical material deposited in museum collections, and two recent expeditions undertaken in the region. The survey resulted in 21 species of gastropods, with nearly 700 voucher specimens (mostly freshwater) deposited in the collection of the Museu de Zoologia da Universidade de São Paulo (São Paulo, Brazil). Circa 30% of the species are non-indigenous; previously, the only known exotic in the region was Melanoides tuberculata (Müller, 1774). The family Achatinidae was the most diverse group in number of native species, while the typically diverse superfamily Orthalicoidea was represented by only two species.
