IMHE OpenIR  > 山地表生过程与生态调控重点实验室
杜际增1,2; 王根绪1; 杨燕1; 张涛1; 毛天旭1
Corresponding Author王根绪
Source Publication生态学报
Other Abstract

 通过整理解译 1969 年航片、1986 年、2000 年、2007 年以及 2013 年 TM(Thematic Mapper)影像数据,对长江黄河源区的高寒湿地分布的时空变化特征进行分析,并结合气象观测数据和人类活动状况,运用主成分分析和灰色关联度法定量分析造成高寒湿地退化的气候因素和人为因素的贡献,并揭示了高寒湿地退化与各环境因子之间的关联性。结果表明:1969 年—2013 年间,江河源区的高寒湿地面积减少了 19.16 %,各湿地类型的斑块分离度不断增大;空间上,高寒湿地的退化区主要分布在长江源区的东北部以及黄河源区的北部地区,与该区域冻土的退化有显著的一致性;1969 年以来,江河源区的气候呈气温显著上升、相对湿度降低以及降水量微弱增加的暖干化趋势,湿地的退化与气候变化在时间上有明显的同步性,其中气温升高是形成湿地退化格局的主要原因,降水量和相对湿度的变化会对湿地的变化产生重要影响,尤其是对河流和湖泊的影响更为显著; 此外,载畜量的变化是影响湿地变化最重要的人为因素。 


The Yangtze River and Yellow River source regions are part of the highest and largest distribution area of wetlands in the world and play a key role in sustaining the ecosystem balance in this region. Current global changes, such as climate change and human activity, are significantly affecting the landscape pattern of these wetlands. These changes have had a major effect on the water cycle and ecosystem balance in this region and have attracted widespread attention. In order to clarify the characteristics of these changes, this research examines the temporal and spatial variation of the distributive patterns of the alpine wetlands in the Yangtze River and Yellow River source regions. The analysis was conducted by using aerial photographs taken in 1969 and Thematic Mapper remote sensing data obtained in 1986, 2000, 2007, and 2013. Additionally, a principal component analysis model and the gray correlation method were carried out using meteorological and human activity data to quantitatively analyze the contribution rates of climate and human factors to alpine wetland degradation. The relationship between alpine wetland degradation and environmental factors was determined. The results show that areas of alpine wetlands in the Yangtze River and Yellow River source regions have decreased by 19.16% from 1969 to 2013. However, the degradation rate of alpine wetlands has gradually decreased since 2000 in this region. Even the total lake area has rebounded from a previous decline and has been increasing since 2007. The spatial separation patch between each kind of alpine wetland increased. There were obvious differences in how the landscapes have changed in each source zone. In the Yangtze River's source region, the landscape change was mainly due to the disappearance of a small patch of wetlands from 1969 to 2007 and fragmentation of the large patch of wetlands since 2007. In the Yellow River's source region, however, the landscape change was mainly due to fragmentation throughout the entire study period. The degradation of alpine wetlands has mainly occurred in the northeastern Yangtze River source region and the northern Yellow River source region, which is consistent with permafrost degradation in this region. The climate in this region has been warming and drying with a significant increase in air temperature, decrease in the relative humidity, and slight increase in precipitation since 1969. There is obvious synchronization between alpine wetland degradation and climate change. Thus, the large increase in air temperature is considered the main contributor to alpine wetland degradation, while the rainfall and relative humidity changes have affected the wetland variation, particularly in the cases of rivers and lakes. The increase in livestock is the most important human factor in alpine wetland degradation. There are still some deficiencies in our research. First, the limited remote sensing data might not capture the inter-annual variability of the rivers, leading to large errors in estimation of river area variation. Secondly, the research reveals only the correlation between the change of wetlands and the various environmental factors by statistical methods, rather than clarifying the driving mechanisms behind them. Thus, future research should attempt to reduce the amount of error by accumulating more remote sensing data and focus on the driving mechanisms of various environmental factors on alpine wetland changes by using a community land model.

Keyword江河源区 高寒湿地 时空变化 驱动因素
Indexed ByCSCD ; 北大中文核心
Project Number国家重点基础研究计划(973 计划)项目(2013CBA01807); 国家自然科学基金杰出青年基金项目(40925002); 自然科学基金面上项目(41271224)
Funding Organization国家重点基础研究计划(973 计划)项目(2013CBA01807) ; 国家自然科学基金杰出青年基金项目(40925002) ; 自然科学基金面上项目(41271224)
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Document Type期刊论文
First Author Affilication中国科学院水利部成都山地灾害与环境研究所
Recommended Citation
GB/T 7714
杜际增,王根绪,杨燕,等. 长江黄河源区湿地分布的时空变化及成因分析[J]. 生态学报,2015,35(18):6173-6182.
APA 杜际增,王根绪,杨燕,张涛,&毛天旭.(2015).长江黄河源区湿地分布的时空变化及成因分析.生态学报,35(18),6173-6182.
MLA 杜际增,et al."长江黄河源区湿地分布的时空变化及成因分析".生态学报 35.18(2015):6173-6182.
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