干旱区生态环境知识资源中心(Arid): 不同干扰下荒漠啮齿动物群落多样性的多尺度分析

Arid

	不同干扰下荒漠啮齿动物群落多样性的多尺度分析
其他题名	Multi-scales analysis on diversity of desert rodent communities under different disturbances
	袁帅 1; 武晓东 1; 付和平 1; 杨泽龙 2; 张福顺 1; 张晓东 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2011
卷号	31 期号:7 页码:1982-1992
中文摘要	尺度问题是生态学的核心问题.将荒漠啮齿动物群落主要特征参数Shannon-Wiener多样性指数作为信息,来探究其在人为干扰下对尺度变化的响应,目的是为了揭示不同干扰条件下荒漠区啮齿动物群落多样性随尺度变化的趋势,为动物群落格局-过程研究的尺度推绎提供生态学基础.2003--2008年每年7月,在内蒙古阿拉善荒漠禁牧,轮牧,过牧和开垦4种不同干扰生境中,选择了1.25,2.5,5,10hm2等4个空间尺度,应用铗日法统计样地中的啮齿动物群落种数及各物种的捕获数据,计算Shannon-Wiener多样性指数,将其作为原始信号进行小波分解.研究结果表明:在荒漠区≤10hm2内,除过牧区外,在其他干扰类型中啮齿动物群落多样性随空间尺度增加均呈上升趋势.啮齿动物群落多样性的原始信号中存在规则的周期性干扰,这种干扰可能是由群落的年际波动造成的.在4种尺度下,各干扰区啮齿动物群落多样性除在开垦区未表现出明显周期外,其余干扰区各自均具有相同的周期:轮牧区4a,禁牧区3a,过牧区2a.荒漠区4种干扰类型中随着空间尺度的增加啮齿动物群落多样性变动幅度减小,抗干扰能力逐渐增强.但不同干扰中啮齿动物多样性的变动幅度和抗干扰能力是不同的.禁牧区与开垦区的啮齿动物多样性在≤2.5hm2范围内较易受到扰动;过牧区在≤5hm2的范围内较不稳定;轮牧区在整个10hm2范围内都易受到扰动
英文摘要	The description of any system depends on spatial and temporal scale. Most researchers agree that processes that occur at different spatial and temporal scales affect ecological communities, and the scale has been one of key problems in ecological approach. Therefore, anthropogenic disturbances affecting ecological communities have to be considered in dependency of scaling--and here, empirical support is still scarce. In this study, Shannon-Wiener indices, the main characteristic parameters of desert rodent communities, were analyzed as basic information to explore their response on multi-scales under anthropogenic disturbances. The experimental objectives were to reveal change tendency of diversity with spatial scale, and to provide the bio-foundation of scaling for the research on pattern and process of animal ecology. Our research area is located on the desert landscape at the south of Alashan Desert in Inner Mongolia. This kind of landscape is fragmented due to long-term anthropogenic disturbances such as grazing, restructuring of grazing area into farmland, and building water conservancy. Data were collected in this area between 2003 and 2008. Moreover, July was chosen as focus month showing characteristic features for Alashan Desert which is caused by the species diversity variance, vegetation flourishes and the highest level in animal numbers during this time. In this term, four spatial scales with 1.25hm2,2.5hm2,5hm2 and 10hm2 were selected at four disturbed habitats(forbidden grazing area, rotational grazing area, over-grazing area, and farmland) in our research area. The species number and the ratio between species in the rodent communities in different habitats were determined using trap-day method at four spatial scales. Shannon-Wiener indices as original signal were decomposed at four levels by using the method of db wavelet analysis. The results indicated that 1st species composition and annual average species richness of rodent depended on the spatial scales in each site(≤10 hm2). Annual average species richness of rodent showed a rising trend with increasing spatial scales. This can be seen as function of species appearance and abundance in different habitat at same scale.2nd a rise of rodent community diversity in sites(≤10 hm2) of each habitat in desert was mainly affected by spatial scales with exception of the over-grazing areas. Here, fluctuation of communities among years occurred, but a regular cycle in original signal at four scales was determined. Therefore, time cue seems to be more affective as spatial ones for this special habitat. However, cycles were different in four disturbed habitats(rotational grazing areas: 4 years, forbidden grazing areas: 3 years, over grazing areas: 2 years, and no cycle in farmland). Even though the cycle length itself appears constant within each habitat, the amplitude per scale differs.3rd the fluctuation amplitude of diversity of rodent communities decreased and anti-jamming ability grew up with an increase of spatial scales in the four disturbed habitats. The diversity of rodent communities in forbidden grazing areas and farmland, over-grazing areas, and rotational grazing areas were easily disturbed at the range of 0-2.5 hm2,0-5 hm2 and 0-10 hm2, respectively. To conclude, wavelet analysis is an efficient method to distilling the tendency of rodent communities′ diversity and signal of disturbance with spatial scale
中文关键词	干扰 ; 尺度 ; 多样性 ; 小波分解
英文关键词	disturbance diversity scale wavelet decomposition
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ECOLOGY
WOS研究方向	Environmental Sciences & Ecology
CSCD记录号	CSCD:4165167
来源机构	内蒙古农业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/226902
作者单位	1.内蒙古农业大学生态环境学院, 草业与草地资源教育部重点实验室, 呼和浩特, 内蒙古 010019, 中国; 2.内蒙古气象科学研究所, 呼和浩特, 内蒙古 010051, 中国
推荐引用方式 GB/T 7714	袁帅,武晓东,付和平,等. 不同干扰下荒漠啮齿动物群落多样性的多尺度分析[J]. 内蒙古农业大学,2011,31(7):1982-1992.
APA	袁帅,武晓东,付和平,杨泽龙,张福顺,&张晓东.(2011).不同干扰下荒漠啮齿动物群落多样性的多尺度分析.生态学报,31(7),1982-1992.
MLA	袁帅,et al."不同干扰下荒漠啮齿动物群落多样性的多尺度分析".生态学报 31.7(2011):1982-1992.