QQ客服 官方微博 反馈留言

	Distribution patterns of groundwater-dependent vegetation species diversity and their relationship to groundwater attributes in northwestern China
	Wang P.; Yu Q.
	2013
关键词	distribution pattern species diversity groundwater-dependent vegetation groundwater attributes in north-western China heihe river-basin lower reaches altitudinal gradient community structure tarim river functional methodology plant-communities ejina basin new-zealand richness
英文摘要	The study of the patterns of plant species diversity and the factors influencing these patterns is the basis of ecology and is also fundamental to conservation biology. Groundwater-dependent vegetation (GDV) must have access to groundwater to maintain their growth and function, and this is especially common in arid and semi-arid regions, including north-western China. In this paper, plant species diversity and groundwater attributes (composition and depth) were investigated in 31 plots in the Ejina Delta in north-western China to determine whether groundwater attributes influenced patterns species diversity in GDV. Detrended canonical correspondence analyses and generalised additive models were performed to analyse the data. A total of 29 plant species were recorded in the 31 plots; perennial herbs with deep roots had an advantage over all other groups, and GDV species diversity was primarily affected by groundwater depth (GWD), salinity (SAL) and total dissolved solids (TDS), HCO3, Ca2+, pH, and SO42. The herb layer species diversity and total species diversity reached their maximum in similar, moderate environmental conditions. The diversity of the tree species was influenced by SAL and TDS and was maximal at large values of GWD and low values of SAL and TDS. The diversity of shrub species was affected by Ca2+ and Mg2+ and was maximal low GWD and high SAL and TDS. Patrick's and ShannonWiener's index of the total community diversity presented a bimodal pattern along gradients of GWD and SAL, whilst Simpson's and Pielou's index showed a partially unimodal pattern. On the basis of field investigation and the analysis of field data, we concluded that the perfect combination of GWD and SAL for GDV species diversity is 2m and 1 center dot 8gl1, respectively. The appropriate combination range is 25m and 1 center dot 84 center dot 2gl1, and the critical combination for the damaged GDV species diversity is 5m and 4 center dot 2gl1. Copyright (c) 2012 John Wiley & Sons, Ltd.
出处	Ecohydrology
卷	6
期	2
页	191-200
收录类别	SCI
语种	英语
ISSN号	1936-0584
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/29981]
专题	地理科学与资源研究所_历年回溯文献
推荐引用方式 GB/T 7714	Wang P.,Yu Q.. Distribution patterns of groundwater-dependent vegetation species diversity and their relationship to groundwater attributes in northwestern China. 2013.

个性服务

查看访问统计

相关权益政策

暂无数据

收藏/分享

除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。