摘要
在遥感和GIS技术支持下,基于1975—2010年长时间序列遥感影像和气象数据资料,结合小波分析、趋势面模拟与空间插值法,选取斑块密度(PD)、斑块平均面积(MPS)、斑块形状破碎化指数(FS)等景观指数,分析了黑河中游的气候空间分布和变化特征,以及该区域湿地的景观破碎化;通过相关分析和多元逐步回归分析,探讨了黑河中游湿地景观破碎化与气候变化的关系.结果表明:1975—2010年,研究区降水量和气温的整体分布格局为高气温区低降水量、低气温区高降水量,且干转湿和冷转暖为其主要变化特征;内陆干旱地区气温对湿地动态变化的影响大于降水,降水对湿地的生态作用甚微;研究区湿地景观破碎化主要表现为MPS减小、PD上升以及FS增大,研究期间,湿地MPS减少48.95hm2,PD上升0.006个·hm-2.
Based on the 1975-2010 multi-temporal remotely sensed TM and ETM images and meteorological data, in combining with wavelet analysis, trend surface simulation, and interpolation method, this paper analyzed the meteorological elements’ spatial distribution and change characteristics in the middle reaches of Heihe River, and elucidated the process of wetland landscape fragmentation in the study area by using the landscape indices patch density （PD）, mean patch size （MPS）, and patch shape fragment index （FS）. The relationships between the wetland landscape fragmentation and climate change were also approached through correlation analysis and multiple stepwise regression analysis. In 1975-2010, the overall distribution patterns of precipitation and temperature in the study area were low precipitation in high temperature regions and high precipitation in low temperature regions, and the main characteristics of climate change were the conversion from dry to wet and from cold to warm. In the whole study period, the wetland landscape fragmentation was mainly manifested in the decrease of MPS, with a decrement of 48.95 hm2, and the increase of PD, with an increment of 0.006 ind·hm-2.
出处
《应用生态学报》
CAS
CSCD
北大核心
2013年第6期1661-1668,共8页
Chinese Journal of Applied Ecology
基金
国家自然科学基金项目(41261047
41271133)
中国清洁发展机制基金项目(1213007)
教育部博士点基金项目(20106203120004)
西北师范大学青年教师科研能力提升计划骨干项目(NWNU-LKQN-11-11)资助
关键词
黑河
湿地
景观破碎化
气候变化
Heihe River
wetland
landscape fragmentation
climate change.
