Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient

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	Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient
	Yang, Ying 1; Cao, Jin-Xiang 1; Pei, Guo-Feng 1; Liu, Guo-Xing 2
刊名	ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
	2015-11-01
卷号	22 期号:22 页码:18093-18106
关键词	Benthic diatoms Biodiversity Biological monitoring Canonical correspondence analysis (CCA) Diatom index Water quality
ISSN号	0944-1344
英文摘要	Benthic diatom assemblages on the natural substrata were investigated at 21 sites of the Ganhe River watershed (China) once per season and in addition, early spring in 2013. A total of 487 diatom taxa from 36 genera were identified during five investigations. The assemblages were dominated by Achnanthidium minutissimum (Kutzing) Czarnecki and Cocconeis placentula in the rural reach, whereas Navicula, Nitzschia, and Gomphonema species were characteristic of urbanized sites. Our results suggest that biodiversity was positively related to high nutrient levels and strongly negatively related to diatom-based indices. The periphyton biomass (expressed as chlorophyll a and ash-free dry mass) was not related to water quality. Canonical correspondence analysis (CCA) showed that the nutrient concentration gradient was the most important factor that affected the diatom assemblage composition and species distribution. The diatom-based indices (specific pollution sensitivity index (IPS), biological diatom index (IBD), and trophic diatom index (TDI)) were significantly positively correlated with water quality and are adequate for use in China. Slight changes in the biodiversity and diatom-based indices followed a temporal pattern. The species composition was less related to the season or hydrological characteristics of the river but more strongly related to differences in the trophic status. In this region, urbanization masked the impact of rural land use on benthic diatoms. The research will expand the understanding of using benthic diatom assemblages for water quality monitoring in urban streams and improve watershed-scale management and conservation efforts in the Ganhe River, China.
WOS标题词	Science & Technology ; Life Sciences & Biomedicine
类目[WOS]	Environmental Sciences
研究领域[WOS]	Environmental Sciences & Ecology
关键词[WOS]	WATER-QUALITY ; ALGAL ASSEMBLAGES ; LAND-USE ; AGRICULTURAL STREAMS ; PERIPHYTON GROWTH ; RIVERS ; PATTERNS ; USA ; COMMUNITIES ; PHOSPHORUS
收录类别	SCI
语种	英语
WOS记录号	WOS:000365423100077
内容类型	期刊论文
源URL	[http://ir.ihb.ac.cn/handle/342005/27423]
专题	水生生物研究所_其他_期刊论文
作者单位	1.South Cent Univ Nationalities, Coll Life Sci, Wuhan 430074, Peoples R China 2.Chinese Acad Sci, Inst Hydrobiol, State Key Lab Freshwater Ecol & Biotechnol, Wuhan 430072, Peoples R China
推荐引用方式 GB/T 7714	Yang, Ying,Cao, Jin-Xiang,Pei, Guo-Feng,et al. Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient[J]. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,2015,22(22):18093-18106.
APA	Yang, Ying,Cao, Jin-Xiang,Pei, Guo-Feng,&Liu, Guo-Xing.(2015).Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient.ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH,22(22),18093-18106.
MLA	Yang, Ying,et al."Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient".ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH 22.22(2015):18093-18106.