Study of Marine Pollution Impact on the Habitat Selection of Indo-pacific Humpback Dolphins

CHEN Mei1,2, SONG Yuqin1,†, QIN Dakong2, ZHU Qian3, WEI Chongxiao4

ACTA Scientiarum Naturalium Universitatis Pekinensis - - News -

1. Department of Environmental Management, College of Environmental Sciences and Engineering, Peking University, Beijing 100871; 2. Center for Nature and Society, School of Life Sciences, Peking University, Beijing 100871; 3. Ocean College, Shandong University (Weihai), Weihai 264209; 4. The Oceanic Administration of Qinzhou, Qinzhou 535000; † Corresponding author, E-mail: yqsong@pku.edu.cn

Abstract To explore impact on marine habitats caused by coastal pollution, predictive models of the Indo-pacific humpback dolphin (Sousa chinensis) distribution were generated using the Maxent modelling approach, based on dolphin occurrence data in Sanniang Bay and its adjacent waters in Guangxi Province during 20062007, the independent oceanographic parameters derived from Google Earth Digital Elevation Model (DEM) and Landsat images, and the water environmental data from the marine investigation in 2012. Results indicated that the distance to the major river mouths was the strongest predictors, and water nutrition and persistent pollutants were the important factors for the dolphin distribution in both wet and dry seasons. Based on the results, habitat selection strategies of the dolphin were discussed: the dolphin tended to select estuaries with abundant prey and avoid highly polluted areas, which could be useful in designing Marine Protected Areas (MPAS) and formulating management strategies. Key words marine pollution; Indo-pacific humpback dolphins modeling; POPS; heavy metals

动物赖以生存和繁殖的空间称为栖息地(habitat)[1]。动物总是趋向于选择最有利于其生存和繁衍的环境作为栖息地, 避开不利的环境[2]。随 (Sousa chinensis); habitat selection; Maxent

着人类持续向海岸带聚居[3], 近岸和河口海域的污染形势愈发严峻, 对海洋生物栖息地造成巨大的威胁[4–6]。包括鲸豚在内的海洋哺乳动物作为环境敏

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