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http://dx.doi.org/10.17820/eri.2015.2.3.198

Prediction of Shift in Fish Distributions in the Geum River Watershed under Climate Change  

Bae, Eunhye (Division of Environmental Science and Ecological Engineering, Korea University)
Jung, Jinho (Division of Environmental Science and Ecological Engineering, Korea University)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.3, 2015 , pp. 198-205 More about this Journal
Abstract
Impacts of climate change on aquatic ecosystems range from changes in physiological processes of aquatic organisms to species distribution. In this study, MaxEnt that has high prediction power without nonoccurrence data was used to simulate fish distribution changes in the Geum river watershed according to climate change. The fish distribution in 2050 and 2100 was predicted with RCP 8.5 climate change scenario using fish occurrence data (a total of 47 species, including 17 endemic species) from 2007 to 2009 at 134 survey points and 9 environmental variables (monthly lowest, highest and average air temperature, monthly precipitation, monthly lowest, highest and average water temperature, altitude and slope). The fitness of MaxEnt modeling was successful with the area under the relative operating characteristic curve (AUC) of 0.798, and environmental variables that showed a high level of prediction were as follows: altitude, monthly average precipitation and monthly lowest water temperature. As climate change proceeds until 2100, the probability of occurrence for Odontobutis interrupta and Acheilognathus yamatsuatea (endemic species) decreases whereas the probability of occurrence for Microphysogobio yaluensis and Lepomis macrochirus (exotic species) increases. In particular, five fish species (Gnathopogon strigatus, Misgurnus mizolepis, Erythroculter erythropterus, A. yamatsuatea and A. koreensis) were expected to become extinct in the Geum river watershed in 2100. In addition, the species rich area was expected to move to the northern part of the Geum river watershed. These findings suggest that water temperature increase caused by climate change may disturb the aquatic ecosystem of Geum river watershed significantly.
Keywords
Aquatic ecosystem; Global warming; MaxEnt; Species distribution; Species richness;
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Times Cited By KSCI : 6  (Citation Analysis)
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