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) FULL PAPERS : THEME 2- HYDRO-ENVIRONMENT : BIODIVERSITY AND BIO-COMMUNITY OF MACROINVERTEBRATE IN DIFFERENT STREAM POWERS IN THE YARLUNG TSANGP...
BIODIVERSITY AND BIO-COMMUNITY OF MACROINVERTEBRATE IN DIFFERENT STREAM POWERS IN THE YARLUNG TSANGPO RIVER
Author : XIONGDONG ZHOU , ZHAOYIN WANG , MENGZHEN XU , BAOZHU PAN & NA ZHAO
Benthic macroinvertebrates are good indicators to access the aquatic ecological status of rivers. They are influenced by complicated river channel parameters as well as water flow variables, such as substrate composition, flow velocity, water depth, suspended load and channel width. In this study, a physical condition index, stream power P which indicates the energy dissipation in the fluvial process integratedly, was introduced. And the relations between stream power and several biotic variables were analysed quantitatively. Field investigations of macroinvertebrates from 11 samples were conducted in April 2014 in the Yarlung Tsangpo River Basin. Altogether 72 taxa of macroinvertebrates belonging to 39 families and 72 genera were identified. Among them were 1 Platyhelminthes, 6 Annelidas, 3 Molluscas and 62 Arthropodas. Taxa richness, density, biomass and Shannon-Wiener diversity index of the 11 samples varied -2 -2 -2 -2 dramatically from 3, 9 ind.?m , 0.0005g?m and 0.37 to 31, 3472 ind.?m , 3.3135g?m and 0.71 respectively. Macroinvertebrates of the 11 samples were analyzed using gradient analysis to discuss the main physical conditions influencing benthic assemblages of the Yarlung Tsangpo River Basin. Preliminary findings of this study indicated: the stream power of habitat showed remarkable logarithmic linear relations to taxa richness, density and biomass. Paucity of macroinvertebrates occurred in the habitats of high stream power with fast flow velocity, large sizing substrate and mass bed load transportation.
File Size : 1,287,902 bytes
File Type : Adobe Acrobat Document
Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) FULL PAPERS
Article : THEME 2- HYDRO-ENVIRONMENT
Date Published : 18/04/2016
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