渭河南部流域底栖动物性状和功能多样性对不同空间尺度环境变量的响应关系
毕业论文关键词：生物性状；功能多样性；fourth-corner；GLM；空间尺度；环境变量
Response of benthic fauna and functional persity to environmental variables at different spatial scales in southern Weihe Basin
Abstract：The difference of the 8 biological traits and 7 functional persity index reflects the Weihe basin aquatic insect communities in mountainous and plain ecological zone, the application of fourth-corner and generalized linear model (GLM), response relationship between the persity of aquatic insects on different spatial scales of environmental variables. The result showed that most of the biological properties and functions of two ecological persity index had significant differences, which has no shelter and from the leaves of benthic animal shelter materials, exoskeleton minor ossification and ossification, good herbivorous and predatory biological traits more life in better habitat in mountainous area, wall breathing, body soft and the biological character of collectors more concentrated in the more frequent human activities in the plain. In addition to the no significant difference in the functional evenness index, the character and functional persity index of the mountainous area were significantly higher than that of the plain. The GLM model results show that in the mountainous area, urban watershed scale water temperature and sediment content on the biological characteristics and functional persity effects, agricultural area, plain area of total nitrogen, silicon dioxide, calcium content and river width affects the biological traits, leading to biopersity index decreased. The land use variables have some effects on the community, but the environmental variables are more important. This paper is a further understanding of the response mechanism of the biological characteristics and functional persity to different spatial scales in china.
Key words: Biological traits; functional persity; fourth-corner; GLM; spatial scale; environmental variables
目 录
摘要1
关键词1
Abstract…1
Key words2
引言…2
1研究方法2
1.1研究区域和采样点位 2
1.2样品采集与测定 3
1.2.1底栖动物采集3
1.3水体理化指标 …3
1.4 流域提取和土地利用计算3
1.5 生物性状和功能多样性指数…4
1.6 统计分析 …5
2结果 6
2.1 环境变量… 6
2．2底栖动物群落、生物性状和功能多样性9
2.3 环境变量与生物性状和功能多样性指数的关系…10