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题名: Using benthic diatom assemblages to assess human impacts on streams across a rural to urban gradient
作者: Yang, Ying1; Cao, Jin-Xiang1; Pei, Guo-Feng1; Liu, Guo-Xing2
关键词: Benthic diatoms ; Biodiversity ; Biological monitoring ; Canonical correspondence analysis (CCA) ; Diatom index ; Water quality
刊名: ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH
发表日期: 2015-11-01
DOI: 10.1007/s11356-015-5026-1
卷: 22, 期:22, 页:18093-18106
收录类别: SCI
文章类型: Article
WOS标题词: Science & Technology ; Life Sciences & Biomedicine
类目[WOS]: Environmental Sciences
研究领域[WOS]: Environmental Sciences & Ecology
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.
关键词[WOS]: WATER-QUALITY ; ALGAL ASSEMBLAGES ; LAND-USE ; AGRICULTURAL STREAMS ; PERIPHYTON GROWTH ; RIVERS ; PATTERNS ; USA ; COMMUNITIES ; PHOSPHORUS
语种: 英语
项目资助者: National Science Foundation of China(30970550) ; Hubei Province(2015CFB416)
WOS记录号: WOS:000365423100077
ISSN号: 0944-1344
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内容类型: 期刊论文
URI标识: http://ir.ihb.ac.cn/handle/342005/27423
Appears in Collections:其他_期刊论文

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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
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