|
|
Relationship between functional feeding groups of macroinvertebrates and environmental factors in Taizi River basin |
|
|
Abstract According to the data obtained from field investigation in Taizi River basin during August 2009, five main functional feeding groups were analyzed, including collector-gatherers (gc), predator (pr), collector-filterers (fc), shredders (sh) and scrapers (sc). Gc represented a significant dominant in the macroinvertebrates community, which accounting for 85.5% of the total number of benthic animal individuals; followed by fc, sh, sc and pr, which accounting for 6.0%, 3.0%, 5.5% and 0.0% respectively. Gc had a strong tolerance to human disturbance, while pr, sh and sc were more sensitive to the change of environmental state. Through the correlation analysis between the relative abundance of five functional feeding groups and water quality factors, the result showed that gc was correlated with altitude, water temperature, conductivity, total nitrogen, nitrate and nitrite, while pr, sc and sh were correlated with altitude, temperature, conductivity, pH, total nitrogen and nitrite. Furthermore, through stepwise regression analysis between land use patterns and five functional feeding groups, the farmland and beachland had significant influence factors on gc, while farmland had significant effects on pr, sc and sh.
|
Received: 30 June 2014
|
|
|
|
|
|
|