农田背景下景观结构对半自然生境生物多样性的多尺度影响

被引:10
作者
王玉婷 [1 ,2 ]
丁圣彦 [1 ,2 ]
梁国付 [1 ,2 ]
机构
[1] 教育部黄河中下游数字地理技术重点实验室
[2] 河南大学环境与规划学院
关键词
生物多样性; 半自然生境; 多尺度; 农田背景;
D O I
暂无
中图分类号
S181 [农业生态学];
学科分类号
071012 ; 0713 ;
摘要
以黄河下游典型农区封丘县为研究区,调查比较了农业景观中半自然生境(包括人工林、树篱和沟渠)与农田生境中植物和地表节肢动物的物种多样性,并应用广义线性模型(GLM)从不同的空间尺度分析半自然生境和农田中的物种多样性与景观变量之间的关系。结果表明:1林地植物多样性最高,且以人工林和沟渠中的植物物种相似度最高;各半自然生境中地表节肢动物的多度和物种丰富度明显高于农田,且以人工林和树篱间地表节肢动物的相似度最高。2在250 m景观范围内的景观变量能更好地解释植物多样性和地表节肢动物多样性,而树篱和沟渠在400 m景观范围上地表节肢动物的尺度效应最显著。3在250 m尺度上植物多样性与景观变量的拟合方面,在人工林和树篱生境中,散布与并列指数(IJI)和植物丰富度呈显著负相关;人工林中IJI和周长面积比(PARAMD)对植物香农多样性指数呈负相关;在树篱中,边缘密度(ED)、聚集度指数(AI)与植物香农多样性指数负相关显著,欧几里得最近距离(ENNMN)与均匀度指数正相关;在沟渠中,ED、AI与植物丰富度显著负相关。4地表节肢动物与景观变量的拟合显示,在250 m景观范围上,人工林生境主要体现在多度与香农多样性指数(SHDI)和土地利用丰富度的负相关,而农田中则是多度与SHDI呈显著负相关,与ED、PARAMD、AI和土地利用丰富度(LUR)呈显著正相关;在400 m景观范围上,树篱中,IJI与地表节肢动物的多度和丰富度呈显著正相关;沟渠生境中,只有多度与IJI和土地利用丰富度显著负相关,与SHDI显著正相关。
引用
收藏
页码:1704 / 1716
页数:13
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