干旱区生态环境知识资源中心(Arid): 缙云山生境片断化对常绿阔叶林生物多样性的影响

Arid

	缙云山生境片断化对常绿阔叶林生物多样性的影响
其他题名	Habitat fragmentation impacts on biodiversity of evergreen broad-leaved forest in Jinyun Mountain
	闫明; 钟章成; 方兴
来源期刊	生态学报
ISSN	1000-0933
出版年	2005
卷号	25 期号:7 页码:1642-1648
中文摘要	采用Simpson、Shannon-Wiener和Hill多样性指数以及逐步多元回归分析方法,在缙云山进行了植物群落调查、小气候观测和土壤肥力的测定以及各变量之间关系的分析.结果表明:片断常绿阔叶林物种多样性指数比连续常绿阔叶林低,不同生活型的表现不同;各片断阔叶林斑块边缘均存在明显的小气候边缘效应.随着斑块面积的减小,各斑块的△Ta、林缘及林内△Ts、林缘和林内ARH、林缘和林内Vmax林缘和林内ApAR(正午)均呈增大的趋势.各斑块的小气候边缘效应,以最大斑块波及林内的深度最浅(约至林内15m)、最小斑块波及林内的深度最深(约至林内25m);常绿阔叶林物种多样性受林内外有效光合辐射(正午)差、气温日较差、土壤含水量、土壤有机质含量和土壤有效钾等因素的影响.
英文摘要	Fragmented forest ecosystems change through time as a result of their isolation as well as other human and natural disturbances. Edge effects are differences in biotic or abiotic factors that exist along the borders of a habitat fragment relative to the interior environment.This study was designed to analyze how species diversity changes in different areas of fragmentation forests using the Simpson, Shannon-Wiener and Hill diversity indices; determine how key microclimatic variables change with increasing distance from the forest edge; and correlate changes in abiotic factors with changes in vegetation to determine which, if any, microclimatic and soil fertility variables are related to changes in plant distribution using stepwise multilinear regression analyses techniques. This study was conducted during April to October, 2003 in Jinyun mountain of Chongqing in China. In each fragment, two 160m transects were established perpendicular to the forest edge. Measurements of vegetation and environmental variables were collected at 0 (edge), 5, 10, 15, 20, 25, 30, 35, 40, 45 and 50m (interior forest), as well as 5, 10, 15, 20m (open forest) along each transect for a total of 12 transects and 96 sampling points in six plots. The plantcommunities were surveyed, the microclimates were observed, and the soil fertilities were determined in six plots of evergreenbroadleaved forests with different size and similar slope aspect.The result of experiment showed that: In general, incomparison withcontinuous evergreen broadleaved forest, fivefragmentations have a lower species diversity index, and different life forms have differences in diversity index. Upon thedecrease of patch areas , the daily differences of air temperature {ATa) and ground surface temperature (ATs), daily differencesof relative humidity (ARID, maximum wind velocity {Vnm). differences of photosynthetic available radiation (A/Mi?) (at noon) of both edge and interior all tend to increase. Maximum wind velocity (K,,,,,*) and photo effective radiation in edge forest are higher than those in interior forest, which present a stronger temperature-gained edge effect. In all, the fragmentation of evergreen broadleaved forests, the depth of edge effect is the nearest from interior forest in the biggest patch (about 15 meters far from interior forest), while the depth of edge effect is farthest from interior forest in the smallest patch (about 25 meters far from interior forest). With regard to the water conservation function, soil water content was improved along with increasing species diversity! Some of the nutritional function substance of soil (such as organic matters and the contents of N, P and K etc. ) were increased with the increasing species diversity; The elements of microclimate, such as Ta, ATa, ATs, AMI, V?,, and PAR, change along with the extent of fragmentation forest.
中文关键词	常绿阔叶林 ; 片断 ; 边缘效应 ; 小气候 ; 生物多样性 ; 多元回归
英文关键词	evergreen broadleaved forest edge effect fragmentation microclimate biodiversity regression
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:2091278
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/206535
作者单位	西南师范大学生命科学学院,三峡库区, 教育部三峡库区生态环境重点实验室, 重庆 400715, 中国
推荐引用方式 GB/T 7714	闫明,钟章成,方兴. 缙云山生境片断化对常绿阔叶林生物多样性的影响[J],2005,25(7):1642-1648.
APA	闫明,钟章成,&方兴.(2005).缙云山生境片断化对常绿阔叶林生物多样性的影响.生态学报,25(7),1642-1648.
MLA	闫明,et al."缙云山生境片断化对常绿阔叶林生物多样性的影响".生态学报 25.7(2005):1642-1648.