Introduction to the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve, Singapore, 2014–2018

Chan, Lena; Davison, G.W.H.

doi:10.26492/gbs71(suppl.1).2019-02

Cited by 17 publications

(20 citation statements)

References 18 publications

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“…The comprehensive biodiversity survey of BTNR has been introduced by Chan & Davison (2019a). To explore the diversity of the different forest types in BTNR, nine transects were established.…”

Section: Methodsmentioning

confidence: 99%

“…1). The background and criteria to distinguish these forest types are described by Chan & Davison (2019a), accounting for deviations from ideal botanical sampling methodology, and further details of the floristics within each type are given by Chan & Davison (2019b). The forest types in each of the nine transects are as follows: Description of the Transects 1.…”

Section: Methodsmentioning

confidence: 99%

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The plant diversity in Bukit Timah Nature Reserve, Singapore

Ho¹,

Lua²,

Ibrahim³

et al. 2019

GBS

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The plant diversity of Bukit Timah Nature Reserve (BTNR) is relatively well studied due to concerted effort over several decades, particularly as part of the worldwide system of ecological plots set up by the Center for Tropical Forest Science (CTFS), now called the Forest Global Earth Observatory. Publications arising from previous works have set baseline data for the species diversity, suggested that the forest resilience was greater than would be expected in such a small forest fragment, but that there was low recruitment of primary forest tree species into the secondary forest. In order to assess the overall vascular plant diversity, and to compare the diversity of the various forest types within BTNR to each other, 52 plots were set up, each 20 × 5 m, along nine different transects that covered the full range of topography and forest types, primary, old secondary and maturing secondary forests, within the reserve. The vascular plant diversity within each plot was recorded. In total, 1250 species in 148 families were recorded, including an additional 167 species newly listed for BTNR. The primary forest had the highest number of species not found in the other forest types. It nevertheless had a very large overlap with species in the old secondary forest but not with the maturing secondary forest.

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Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

The plant diversity in Bukit Timah Nature Reserve, Singapore

Ho¹,

Lua²,

Ibrahim³

et al. 2019

GBS

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“…In spite of their overall similarity and their close proximity on different faces of a single hill, each of the streams shows individual characteristics. These are related to catchment size for each stream (Cai, 2019), the intensity of human impacts in different parts of BTNR (Chatterjea, 2019) that differentially affect the stream catchments, the current vegetation structure (primary, old secondary and maturing secondary forest) (Chan & Davison, 2019) affecting tree size, rainfall interception versus stemflow, leaf litter depth, root density and root penetration, as well as details of slope, bedrock, and soil chemistry. These factors play out through the expected interactions between soil, groundwater and rainfall.…”

Section: Conclusion and Recommendationsmentioning

confidence: 99%

Physicochemical characteristics of streams in Bukit Timah Nature Reserve, Singapore

Nguyen¹,

Car²

2019

GBS

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Spatial and temporal surveys were conducted to better understand the physicochemical characteristics of the streams in Bukit Timah Nature Reserve (BTNR). A total of 87 survey stations were selected along ten streams for an in-situ water quality study conducted in June 2018. Temporal investigation, including in-situ and ex-situ samplings, was conducted from late November 2017 to July 2018 for Fern Valley and Jungle Fall streams. The in-situ physicochemical parameters included pH, Dissolved Oxygen (DO), Conductivity, Oxidation-Reduction Potential (ORP), Total Dissolved Solids (TDS), Turbidity, Salinity, and Temperature. Water samples were collected for further analysis of Total Suspended Solids (TSS), anions, cations, elements, Total Organic Carbon (TOC), Total Nitrogen (TN) and Total Phosphorus (TP). Water discharge was calculated as stream crosssectional area multiplied by water velocity. Groundwater samples (down to maximum 2 m) were collected at upstream and downstream locations in Fern Valley and Jungle Fall catchments and analysed for water chemistry. Seventy-five soil samples (surface and subsurface) were collected to investigate the hydrogeomorphic conditions of the catchments in an attempt to understand the influence of hillslopes on water quality within the stream channel. Physicochemical baselines of the streams in Bukit Timah Hill were established, the data suggesting that stream temperature, TDS, salinity, the amount of TOC, TP, anions and cations vary within their expected natural ranges. Some parameters including DO and conductivity are slightly lower than expected, which may not be favorable for large aquatic animals. Some issues needing further investigations include low stream pH in Jungle Fall and Seraya streams as well as the significantly high concentration of Cd, Sb and Se in all streams. Follow-up actions are recommended to further investigate the drivers and monitor the effect of stream acidification, the causes and effects of high concentration of Cd, Sb and Se, as well as possible stream rehabilitation measures leading to improvement of water quality.

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“…The importance of conserving Bukit Timah Nature Reserve (BTNR) has been highlighted in an Introduction to the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve (Chan & Davison, 2019). The nature reserve is of continuing national importance.…”

Section: Introductionmentioning

confidence: 99%

“…As mentioned in the introductory paper to this volume, from 2014 to 2018 the National Parks Board organised a similar survey of the BTNR alone (Chan & Davison, 2019) with several structured and organised features that made it significantly different from the other surveys.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of results from the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve, Singapore, with recommendations for management

Chan¹,

Davison²

2019

GBS

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Twenty-two papers arising from the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve (BTNR), Singapore (2014-2018) have provided a thorough update and expansion of information on many groups of flora and fauna. In spite of the small size and isolation of BTNR there is still remarkable diversity, and new records and new species continue to accumulate. A large body of information on the terrestrial and aquatic physical environment is now available, providing a context for many of the biological results. Various management recommendations emerge.

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Introduction to the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve, Singapore, 2014–2018

Cited by 17 publications

References 18 publications

The plant diversity in Bukit Timah Nature Reserve, Singapore

The plant diversity in Bukit Timah Nature Reserve, Singapore

Physicochemical characteristics of streams in Bukit Timah Nature Reserve, Singapore

Synthesis of results from the Comprehensive Biodiversity Survey of Bukit Timah Nature Reserve, Singapore, with recommendations for management

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