Spatiotemporal dynamics of ecological variation of waterbird habitats in Dongtan area of Chongming Island  

作　　者：范学忠 张利权 

机构地区：[1]State Key Laboratory of Estuarine and Coastal Research,East China Normal University [2]Shanghai Key Laboratory of Urbanization and Ecological Restoration,East China Normal University

出　　处：《Chinese Journal of Oceanology and Limnology》2012年第3期485-496,共12页中国海洋湖沼学报（英文版）

基　　金：Supported by the National Basic Research Program of China (973 Program) (Nos. 2010CB951204, 2008DFB90240);the National Special Research Fund for Non-Profit Sector (Marine) (No. 200805080)

摘　　要：Based on Landsat TM images, we explored the pattern of variation of suitable waterbird habitats from 1990 to 2008 in the Dongtan area of Chongming Island at the Changjiang (Yangtze) River mouth. By applying our highly accurate indicator model (R=0.999, P<0.01), we quantified the variations of fluctuation intensity for local waterbird habitats during 1990-2008, and for the main waterbird groups (Anatidae, Charadriidae, Ardeidae and Laridae) from 2006 to 2008, to evaluate the impact of habitat quantity change on the waterbird habitat status and the population dynamics of the different waterbird groups. The results show that the aquaculture ponds (AP) and the Scirpus mariqueter zone (SMZ) underwent drastic habitat changes during certain periods (AP: 1997-2000, 2000-2003, 2005-2008; SMZ: 1997-2000), and the fluctuation intensity differed among habitat types in the order AP>SMZ>TSH (total suitable habitat)>BSA (bare mud flat and shallow water area). The abandonment of tracts of aquaculture ponds in Dongtan in mid-2006 brought about an intensive population fluctuation, caused by rapidly changing habitat with the population expanding to adjacent areas. At present, Anatidae and Ardeidae are threatened in the Dongtan area with declining populations because of their very "picky" habitat requirements (i.e., high reliance on AP). The Charadriidae experienced enormous population declines in the late 1990s, however, they have since recovered to normal levels as habitat change has stabilized. Our findings suggest that the current challenges for habitat management are the protection and stabilization of AP and SMZ habitats.Based on Landsat TM images, we explored the pattern of variation of suitable waterbird habitats from 1990 to 2008 in the Dongtan area of Chongming Island at the Changjiang （Yangtze） River mouth. By applying our highly accurate indicator model （R=0.999, P〈0.01）, we quantified the variations of fluctuation intensity for local waterbird habitats during 1990-2008, and for the main waterbird groups （Anatidae, Charadriidae, Ardeidae and Laridae） from 2006 to 2008, to evaluate the impact of habitat quantity change on the waterbird habitat status and the population dynamics of the different waterbird groups. The results show that the aquaculture ponds （AP） and the Scirpus mariqueter zone （SMZ） underwent drastic habitat changes during certain periods （AP： 1997-2000, 2000-2003, 2005-2008; SMZ： 1997-2000）, and the fluctuation intensity differed among habitat types in the order AP〉SMZ〉TSH （total suitable habitat）〉BSA （bare mud flat and shallow water area）. The abandonment of tracts of aquaculture ponds in Dongtan in mid-2006 brought about an intensive population fluctuation, caused by rapidly changing habitat with the population expanding to adjacent areas. At present, Anatidae and Ardeidae are threatened in the Dongtan area with declining populations because of their very ＂picky＂ habitat requirements （i.e., high reliance on AP）. The Charadriidae experienced enormous population declines in the late 1990s, however, they have since recovered to normal levels as habitat change has stabilized. Our findings suggest that the current challenges for habitat management are the protection and stabilization of AP and SMZ habitats.

关 键 词：WATERBIRD BIODIVERSITY habitat management population dynamics nature reserve Chongrning Island Changjiang （Yangtze） River estuary 

分 类 号：X171[环境科学与工程—环境科学]