Imperial College London
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ProfessorRobertEwers

Faculty of Natural Sciences, Department of Life Sciences (Silwood Park)

Professor of Ecology
 
 
 
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Contact

 

+44 (0)20 7594 2223r.ewers

 
 
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Location

 

1.4Centre for Population BiologySilwood Park

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Summary

 

Publications

Citation

BibTex format

@article{Wilkinson:2019:1748-9326/ab0128,
author = {Wilkinson, CL and Yeo, DCJ and Tan, HH and Hadi, Fikri A and Ewers, RM},
doi = {1748-9326/ab0128},
journal = {Environmental Research Letters},
title = {Resilience of tropical, freshwater fish (Nematabramis everetti) populations to severe drought over a land-use gradient in Borneo},
url = {http://dx.doi.org/10.1088/1748-9326/ab0128},
volume = {14},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Biodiversity-rich forests in tropical Southeast Asia are being extensively logged and converted to oil-palm monocultures. In addition, extreme climatic events such as droughts are becoming more common. Land-use change and extreme climatic events are thought to have synergistic impacts on aquatic biodiversity, but few studies have directly tested this. A severe El Niño drought in Southeast Asia in early 2016 caused 16 low-order hill streams across a land-use gradient encompassing primary forest, logged forest and oil palm plantations in Sabah, Malaysia, to dry up into series of disconnected pools. The resulting disturbance (specifically, increased water temperature and decreased dissolved oxygen concentration) tolerated by the fish during the drought exceeded any worst-case scenario for climate change-induced warming. We quantified the biomass, density and movement of the dominant freshwater fish species, Nematabramis everetti (Cyprinidae), in these streams across this land-use gradient before, during, and after the 2016 El Niño drought period. Density of N. everetti was significantly lower in logged forest streams than primary forest or oil palm streams, and the biomass of individuals captured was lower during drought than prior to the drought; however, there was no change in the biomass density of individuals during drought. The distance moved by N. everetti was significantly lower during and after the drought compared to before the drought. We detected a significant antagonistic interaction on biomass of captured fish, with the magnitude of the drought impact reduced according to land-use. Populations of N. everetti were surprisingly resilient to drought and seem most affected instead by land-use. Despite this resilience, it is important to monitor how this widespread and abundant species, which provides an important ecosystem service to local human communities, is affected by future land-use and climate change, as logging, deforestation and conversi
AU  - Wilkinson,CL
AU  - Yeo,DCJ
AU  - Tan,HH
AU  - Hadi,Fikri A
AU  - Ewers,RM
DO  - 1748-9326/ab0128
PY  - 2019///
SN  - 1748-9326
TI  - Resilience of tropical, freshwater fish (Nematabramis everetti) populations to severe drought over a land-use gradient in Borneo
T2  - Environmental Research Letters
UR  - http://dx.doi.org/10.1088/1748-9326/ab0128
UR  - http://hdl.handle.net/10044/1/67226
VL  - 14
ER  -
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