|  |
Program |
 |
| |
 |
Special Session 7: Coastal assessments: From implementation to impact: understanding the gap |
| |
|
|
Assessment of migratory waterfowl habitat status in Shanghai coastal region
SS7-07
Ting Zhang, East China Normal University
Bo Tian* , East China Normal University
Presenter Email: btian@sklec.ecnu.edu.cn
|
| "Coastal wetlands play an important role in migratory waterfowl habitat, but due to the city expansion, reclamation engineering, coastal erosion, global climate, environmental pollution and invasive species, waterfowl habitat faces the threat of destruction and loss. Shanghai located in the Yangtze River Estuary, is the important overwintering sites of the Charadriidae and Anatidae. This study uses multidimensional remote sensing data, constructs an assessment model to evaluate the changes of waterfowl habitat status in shanghai from the view of space-time. It provides scientific evidence for the bird habitat conservation and the sustainable development of the wetland ecosystem in the coastal zone. In this paper, the study area is Shanghai coastal zone, the evaluation units are obtained by dividing coastline into a number of equidistant shorelines (approximately 2 km).Comprehensive consideration of food, water and shelter, we select a number of indicators, including land cover types, vegetation types, vegetation coverage, mudflat width, benthos et.al. On this basis, we proposed remote sensing evaluation model based on Ecological composite and fuzzy analysis to assess the status of Waterfowl Habitat in Shanghai coastal zone. The results show: (1) In 2005-2010 and 2010-2015 two periods, the offshore and coastal wetlands in Shanghai lost most, the net loss rates were 11.68% and 4.97% respectively; Correspondingly palustrine and mudflat increased significantly, the total net growth rate in 10 years reached 6.30% and 6.11%. (2) Over the past 10 years, the change of waterfowl habitat were extremely significant in Chongming North Beach, Chongming Dongtan,Nanhui beach and Hengsha East Shoal with the changing patterns of offshore and coastal wetlands to mudflat, then transformed by the mudflat for the palustrineand these changed regions included more than 80% new suitable habitat. And we also found:(1)The accuracy of habitat information extraction can be improved by measuring the spectral data and using the high resolution image instead of Landsat image.(2)The evaluation model has certain application prospects for further expansion and value in the large scale of coastal risk assessment and driving force analysis. (3)This assessment not only conducive to waterfowl conservation and habitat management, but also provide technical support for the research of coastal wetland ecosystem services, ecological value assessment and so on. Keywords: remote sensing, coastal wetland, waterfowl habitat, condition assessment first author:Ting Zhang; corresponding author:Bo Tian" |
|
|
|
|