Journal
FISHERIES MANAGEMENT AND ECOLOGY
Volume 26, Issue 2, Pages 131-140Publisher
WILEY
DOI: 10.1111/fme.12333
Keywords
conductivity; dissolved oxygen; hydrological connection; macrophytes; water level; Yangtze River
Categories
Funding
- Natural Science Foundation of China [31260107]
- National Ecosystem Research Station of Jiangxi Poyang Lake Wetland
- Monitoring of Fish Resources at Poyang Lake
Ask authors/readers for more resources
The Yangtze River and its watershed have undergone vast changes resulting from centuries of human impacts, yet ecological knowledge of the system is limited. The seasonal variation and spatial variation of three sub-lakes of Poyang Lake, a huge wetland in the middle Yangtze Basin, were investigated to examine how fish assemblages respond to seasonal hydrology and associated environmental conditions. In all three sub-lakes, fish assemblage structure revealed strong variations associated with seasonal water level fluctuation. Fish species richness in all sub-lakes was highest during the middle of the monsoon season and lowest during the dry season. Fish numerical abundance and biomass varied significantly, with several of the most common species having inconsistent patterns of seasonal variation among sub-lakes. Fish assemblage structure was significantly associated with environmental gradients defined by water level, aquatic macrophyte coverage, conductivity and dissolved oxygen concentration. Assemblage composition in all three sub-lakes underwent strongest shifts between December and April, the period when water levels were lowest and fishing has the greatest impact on fish stocks. Future impacts that change the hydrology of the middle Yangtze would alter the dynamics of habitat connectivity and affect environmental conditions and fish assemblages of the Poyang Lake wetland system.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available