干旱区生态环境知识资源中心(Arid): 岷江干旱河谷植物群落物种周转速率与环境因子的关系

Arid

	岷江干旱河谷植物群落物种周转速率与环境因子的关系
其他题名	The relationships between plant community species turnover rates and environmental factors in the arid valley of Minjiang River
	关文彬 1; 冶民生 1; 马克明 2; 刘国华 2; 汪西林 1; 谭辉 1
来源期刊	生态学报
ISSN	1000-0933
出版年	2004
卷号	24 期号:11 页码:2367-2373
中文摘要	通过对岷江干旱河谷植被及其环境因子的系统取样调查,采用beta多样性指数-Cody指数,从海拔、样带、群系、地形以及土壤养分、水分梯度上研究了该地区植物群落的物种周转速率.结果表明:随海拔的升高,物种周转速率表现出"高-低-高"的变化规律.在海拔1300～1600m和1900～2200m这两个海拔段,物种平均替代速率均较高;而在1600～1900m海拔段,物种平均替代速率较低.beta多样性在样带梯度上的变化表现为干旱河谷核心区的样带较南部和北部过渡区的样带有较高的物种周转速率,这与样带所处的环境条件有关.群系之间的beta多样性表现为:华帚菊-小黄素馨灌丛、金花小檗-忍冬灌丛、黄花亚菊灌丛、橿子栎灌丛、小花滇紫草灌丛、莸灌丛、绣线菊灌丛与其它灌丛之间有着较高的物种周转速率.坡面不同地形上的物种周转速率:不同坡向,阴坡>半阴半阳坡>阳坡;不同坡形,凹坡>平坡>凸坡;不同坡位,下坡位>上坡位>中坡位.beta多样性在土壤水分和养分梯度上的变化表现为与土壤水解N、速效K、全N含量、全P含量以及土壤含水量成显著的二次曲线关系,与土壤有机质和全K含量也呈现出二次曲线关系,但关系不显著,与pH值和速效P之间没有明显的规律.
英文摘要	The arid valley of the upper reaches of the Minjiang River is located in the transition zone between the Qinghai-Tibet plateau to the Sichuan Basin. It has a typical arid valley climate with complex topography and variable water and heat conditions. A long history of anthropogenic influences combined with severe natural environments resulted in degraded vegetations dominated by xeric shrubs. The objective of this study was to relate the plant community species turn over rates to their environments to provide a basic scientific data for ecosystem restoration and management in the region. In the arid valley of the Minjiang River, we established six transects along altitude gradients where vegetation compositions and fourteen environmental factors that describe the topography, soil water and nutrient status, were measured. The /? diversity, calculated by the Cody index> was used as species turnover rate of plant community in the study area. We found that altitude gradient had great influence on the distribution of biodiversity. The /? diversity values showed a "high-low-high" trend with the increasing of altitude in the area. Both herbs and shrubs layers had high species turnover rates at the 1300 ~-1600 m and 2O00~22O0 m altitudes, while low species turnover rate were found at the 16OO~19OO m altitude. The central area of the valley had higher /9 diversity than the north and south transition zones, presumably due to the differences of environmental conditions. There were 11 typical plant formations in the study area. Our study suggested that Form. Pertya sinensis, Jasminum humile* Form. Herberts wilsonae, Lonicera japonica-. Form. Ajania breviloba^ Form. Quercus cocciferoides s Form. Onosma. farrerii. Form. Caryopteris spp. ^ Form. Spiraea Spp had higher species turnover rate than other plant formations. Topography plays an important role in the distribution of vegetation as well as biodiversity. We also found that species turnover rate varied according to slope directions with a trend: north facing slope> half south facing and half north facing slope>south facing slope. Species turnover rates also varied among slope positions and slope shapes with ranking in an order lower slope >middle slope> upper slope, and concave slope>straight slope >convex slope, respectively. Soil water and nutrient status were found to be the most important limiting factors for plant growth and development in the area. We found that except for soil pH value and available P, significant quadratic relationships exited between hydrolyzable N,available K, total P,total N>soil water content and /? diversity. Soil organic matter content and total K were also correlated with ft diversity in the form of a quadratic curve, but correlation was not significant. Changes of /? diversity did not have significant correlations with soil pH and available P.
中文关键词	植物群落 ; 环境梯度 ; 物种周转速率 ; beta多样性 ; 岷江干旱河谷
英文关键词	Plant community environmental gradient species turnover rate beta diversity the arid valley of Minjiang River
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:1805513
来源机构	北京林业大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/205386
作者单位	1.北京林业大学, 水土保持与荒漠化防治教育部重点实验室, 北京 100083, 中国; 2.中国科学院生态环境研究中心, 北京 100085, 中国
推荐引用方式 GB/T 7714	关文彬,冶民生,马克明,等. 岷江干旱河谷植物群落物种周转速率与环境因子的关系[J]. 北京林业大学,2004,24(11):2367-2373.
APA	关文彬,冶民生,马克明,刘国华,汪西林,&谭辉.(2004).岷江干旱河谷植物群落物种周转速率与环境因子的关系.生态学报,24(11),2367-2373.
MLA	关文彬,et al."岷江干旱河谷植物群落物种周转速率与环境因子的关系".生态学报 24.11(2004):2367-2373.