Arid
DOI10.1080/02705060.2014.974225
Factors affecting spatiotemporal benthic macroinvertebrate diversity and secondary production in a semi-arid watershed
Mehler, Knut1,2; Acharya, Kumud1; Sada, Donald1; Yu, Zhongbo2
通讯作者Acharya, Kumud
来源期刊JOURNAL OF FRESHWATER ECOLOGY
ISSN0270-5060
EISSN2156-6941
出版年2015
卷号30期号:2页码:197-214
英文摘要

Spatial and temporal changes of the benthic macroinvertebrate (BMI) community composition and secondary production provide valuable information about the current ’health’ of aquatic systems. We analyzed seasonal and inter-annual changes in BMI communities at five sites along an elevation and land use gradient in the Walker River, NV, USA. In addition, bimonthly collections of Baetis mayflies were made at two sites to assess the effect of nutrient enrichment on Baetis secondary production. BMI community composition changed spatially and temporally in response to the physicochemical environment. BMI diversity was positively correlated to substrate size and stream width but negatively correlated with stream temperature and organic pollutants. Cluster analysis based on BMI community composition revealed a similar community structure along the river, except at one site which was located below the outflow of a eutrophic reservoir. The BMI community in the river was dominated by collector-gatherers while shredders were absent through most of the downstream and impaired sites. Secondary production of Baetis was almost twice as high at the nutrient-enriched site (1.3g dry mass m(-2) yr(-1)) than at the undisturbed site (0.7g m(-2) yr(-1)), most likely the consequence of warmer water temperatures and superior food quality. Results from this study imply that a variety of anthropogenic activities have altered disparate reaches of the Walker River and that BMI community composition would change towards natural conditions with an increase in discharge and reduced water temperature and nutrients. This work also underscores the importance of considering biotic indices and secondary production to effectively assess stream ecosystem health and to design successful restoration strategies.


英文关键词secondary production species richness biotic indices land use community composition benthic macroinvertebrates environmental factors
类型Article
语种英语
国家USA
收录类别SCI-E
WOS记录号WOS:000353953700001
WOS关键词RIVER CONTINUUM CONCEPT ; LAND-USE ; COMMUNITY STRUCTURE ; MOUNTAIN STREAMS ; INSECTS ; ECOSYSTEM ; GRADIENT ; GROWTH ; FLOW ; TEMPERATURE
WOS类目Ecology ; Limnology
WOS研究方向Environmental Sciences & Ecology ; Marine & Freshwater Biology
来源机构Desert Research Institute
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/188631
作者单位1.Univ Nevada Reno, Desert Res Inst, Div Hydrol Sci, Las Vegas, NV 89119 USA;
2.Univ Nevada, Dept Geosci, Las Vegas, NV 89154 USA
推荐引用方式
GB/T 7714
Mehler, Knut,Acharya, Kumud,Sada, Donald,et al. Factors affecting spatiotemporal benthic macroinvertebrate diversity and secondary production in a semi-arid watershed[J]. Desert Research Institute,2015,30(2):197-214.
APA Mehler, Knut,Acharya, Kumud,Sada, Donald,&Yu, Zhongbo.(2015).Factors affecting spatiotemporal benthic macroinvertebrate diversity and secondary production in a semi-arid watershed.JOURNAL OF FRESHWATER ECOLOGY,30(2),197-214.
MLA Mehler, Knut,et al."Factors affecting spatiotemporal benthic macroinvertebrate diversity and secondary production in a semi-arid watershed".JOURNAL OF FRESHWATER ECOLOGY 30.2(2015):197-214.
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