IAHR, founded in 1935, is a worldwide independent member-based organisation of engineers and water specialists working in fields related to the hydro-environmental sciences and their practical application. Activities range from river and maritime hydraulics to water resources development and eco-hydraulics, through to ice engineering, hydroinformatics, and hydraulic machinery.
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You are here : eLibrary : IAHR World Congress Proceedings : 36th Congress - The Hague (2015) ALL CONTENT : Hydro-environment : Spatial and temporal variation of macro-invertebrate functional feeding groups abudance in relation ...
Spatial and temporal variation of macro-invertebrate functional feeding groups abudance in relation to hydro-environmental factors in a sbutropical kast river, china
Author : WENQIANG WU(2), YUQING LIN(1) , QIUWEN CHEN*(3) & BO CHEN(4)
ABSTRACT
Our study evaluated the effects of spatial and seasonal variation on the structure of the macroinvertebrate functional
feeding groups abundance in a subtropics river in China. Sampling was performed during the dry (October 2009) and wet
(April 2010) period, characterizing flow, physical and chemical conditions were analyzed for each sample in three reaches
located in upstream, middle stream and downstream. The result showed that predator, scraper and collector-gathers
abundance increased in wet period in all three reaches; Shredder and collector-filter abundance decreased in wet period
both upstream and midstream, but increased in downstream. Shredders abundance in dry period(decreasing) and in wet
period(increasing) from upstream to downstream; Collector-filter had similar abundance in dry period, but the abundance
of downstream was higher than upstream and midstream in wet period; Scraper abundance were much lower in upstream
than midstream and downstream in both season; Predator abundance increased in both season from upstream to
downstream. The distribution of dominant species can better explain the variation of FFGs. After Canonical
correspondence analysis(CCA), eight variables(substratum type (cobble, pebble), velocity, total nitrogen, salinity, water
temperature, aquatic plant, turbidity) governed the community structure variance.
File Size : 435,745 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 18/08/2015
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