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http://dx.doi.org/10.17820/eri.2015.2.3.206

Prediction of Changes in the Potential Distribution of a Waterfront Alien Plant, Paspalum distichum var. indutum, under Climate Change in the Korean Peninsula  

Cho, Kang-Hyun (Department of Biological Sciences, Inha University)
Lee, Seung Hyun (Chungrok Environmental Ecosystem Research Institute)
Publication Information
Ecology and Resilient Infrastructure / v.2, no.3, 2015 , pp. 206-215 More about this Journal
Abstract
Predicting the changes in the potential distribution of invasive alien plants under climate change is an important and challenging task for the conservation of biodiversity and management of the ecosystems in streams and reservoirs. This study explored the effects of climate change on the potential future distribution of Paspalum distichum var. indutum in the Korean Peninsula. P. distichum var. indutum is an invasive grass species that has a profound economic and environmental impact in the waterfronts of freshwater ecosystems. The Maxent model was used to estimate the potential distribution of P. distichum var. indutum under current and future climates. A total of nineteen climatic variables of Worldclim 1.4 were used as current climatic data and future climatic data predicted by HadGEM2-AO with both RCP 2.6 and RCP 8.5 scenarios for 2050. The predicted current distribution of P. distichum var. indutum was almost matched with actual positioning data. Major environmental variables contributing to the potential distribution were precipitation of the warmest quarter, annual mean temperature and mean temperature of the coldest quarter. Our prediction results for 2050 showed an overall reduction in climatic suitability for P. distichum var. indutum in the current distribution area and its expansion to further inland and in a northerly direction. The predictive model used in this study appeared to be powerful for understanding the potential distribution, exploring the effects of climate change on the habitat changes and providing the effective management of the risk of biological invasion by alien plants.
Keywords
Climate change; Invasive alien plants; Paspalum distichum var. indutum; Species distribution modelling; Stream;
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