JOURNAL OF NATURAL RESOURCES ›› 2013, Vol. 28 ›› Issue (4): 656-667.doi: 10.11849/zrzyxb.2013.04.012

• Resources Evaluation • Previous Articles     Next Articles

Study on Moorburn Remote Sensing Monitoring on Poyang Lake Wetland Area and Its Influence

WANG Juan-le1, HU Zhen-peng2,3, RAN Ying-ying4, WANG Xiao-long5, ZHANG Yong-jie4   

  1. 1. State Key Lab of Resources and Environmental Information System, Institute of Geographic Sciences and Natural Resources Research, CAS, Beijing 100101, China;
    2. Jiangxi Province Academy of Sciences, Nanchang 330029, China;
    3. Nanchang University, Nanchang 330031, China;
    4. College of Geoscience and Surveying Engineering, Chinese University of Mining & Technology (Beijing), Beijing 100083, China;
    5. Nanjing Institute of Geography and Limnology, CAS, Nanjing 210008, China
  • Received:2012-08-03 Revised:2012-10-08 Online:2013-04-20 Published:2013-04-20

Abstract:

Poyang Lake wetland is an important district of ecological function zoning in China, which has the functions of flood controlling and biodiversity conservation for ecological services. There are nine national and provincial nature reserves in Poyang Lake area. In recent years, the regional drought meteorological disasters frequently occurred caused by global warming, which made Poyang Lake area water body and water level of wetlands decline, even dry up. This resulted in the breeding of a large number of moss grassland in the region. Moorburn occurred frequently consequently. This is a big threat to Poyang Lake wetland nature reserve and regional ecological environment. In early 2012, the events of moorburn appeared in many places in Poyang Lake area. Facing to this urgent situation, this study, using the remote sensing quickly monitoring technology and vegetation ground investigation method, acquires the first-hand moorburn distribution area, location and vegetation growth state data. Serial knowledge are obtained based on the vegetation growth situation contrast analysis between moorburn area and non-moorburn area, and GIS buffer and overlay analysis. 1) The total patches of the moorburn region are 95, the total area of the burned is 10278.6196 ha, and the largest patch area is 1293 ha. Moorburn region mainly distributed in the Poyang Lake National Nature Reserve in Wucheng town, Yongxiu county, and the Nanjishan provincial wetland nature reserve in Xinjian county. 2) Moss grassland number was increased obviously in moorburn area, and its surface biomass and vegetation coverage are higher than that in non-moorburn area, but lower in the late period of growth. The vegetation height is lower in moorburn area than that in non-moorburn area in all the progress of bourgeon and growth stage. The moss grassland community species richness and biodiversity in moorburn area is lower than that in non-moorburn area obviously in the late period of growth. 3) GIS analysis indicates that the land cover types which were mostly influenced by the moorburn are still the dry lakebed and adjacent farmland. With the expansion of the buffer zone, the proportion of affected forests and rural settlement types increased, and more attention should be paid to this consequence. Related suggestions on wetland resources protection and moorburn management are proposed finally.

Key words: Poyang Lake wetland, moorburn, remote sensing monitoring, vegetation growth investigation, environmental management

CLC Number: 

  • TP79