QQ客服 官方微博 反馈留言

	An exploratory analysis of benthic macroinvertebrates as indicators of the ecological status of the Upper Yellow and Yangtze Rivers
	Pan B. Z. ; Wang Z. Y. ; Li Z. W. ; Yu G. A. ; Xu M. Z. ; Zhao N. ; Brierley G.
	2013
关键词	macroinvertebrate biodiversity standing crops functional feeding group Yellow River source zone Yangtze River source zone source region invertebrates assemblages macrophytes management china lakes patterns wetlands runoff
英文摘要	This study presents findings of the first systematic analysis of aquatic biotic assemblages in the source region of the Yellow and Yangtze Rivers. It provides an initial basis with which to select representative organisms as indicators to assess the aquatic ecological status of rivers in this region. Macroinvertebrates are considered to be good indicators of long-term environmental changes due to their restricted range and persistence over time. Field investigations of macroinvertebrates were conducted in August 2009 in the source region of the Yellow River, and in July 2010 in the source region of the Yangtze River. Altogether 68 taxa of macroinvertebrates belonging to 29 families and 59 genera were identified. Among them were 8 annelids, 5 mollusks, 54 arthropods and 1 other animal. In the source region of the Yellow River, taxa number, density and biomass of macroinvertebrates were 50, 329 individuals m(-2) and 0.3966 g dry weight m(-2), respectively. Equivalent figures for the source region of the Yangtze River were 29, 59 individuals m(-2) and 0.0307 g dry weight m(-2). The lower benthic animal resources in the source region of the Yangtze River are ascribed to higher altitude, higher sediment concentration and wetland degradation. Preliminary findings of this exploratory study indicate that hydroelectric power stations had a weak impact on benthic dwellers but wetland degradation caused by a series of human activities had a catastrophic impact on survival of macroinvertebrates. Ecological protection measures such as conservative grazing and vegetation management are required to minimize grassland degradation and desertification, and reduce soil erosion rate and river sediment discharge.
出处	Journal of Geographical Sciences
卷	23
期	5
页	871-882
收录类别	SCI
语种	英语
ISSN号	1009-637X
内容类型	SCI/SSCI论文
源URL	[http://ir.igsnrr.ac.cn/handle/311030/30325]
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	Pan B. Z.,Wang Z. Y.,Li Z. W.,et al. An exploratory analysis of benthic macroinvertebrates as indicators of the ecological status of the Upper Yellow and Yangtze Rivers. 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。