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 : 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
ertebrates 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
dramatically from 3, 9 ind.m-2, 0.0005gm-2 and 0.37 to 31, 3472 ind.m-2, 3.3135gm-2 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.Form Required :
File Size : 854,932 bytes
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Chapter : IAHR World Congress Proceedings
Category : 36th Congress - The Hague (2015) ALL CONTENT
Article : Hydro-environment
Date Published : 27/08/2015
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