Research Library

Premium Ecological consequences of the Three Gorges Dam: insularization affects foraging behavior and dynamics of rodent populations
Wang Jianzhu,
Huang Jianhui,
Wu Jianguo,
Han Xingguo,
Lin Guanghui
Publication year2010
Publication title
frontiers in ecology and the environment
Resource typeJournals
PublisherEcological Society of America
A number of permanent and seasonal islands will be formed when the world's largest dam, China's Three Gorges Dam, begins to operate at full capacity in 2009. The possible effects of this large‐scale habitat insularization on biodiversity and ecosystem processes have attracted considerable attention from scientists around the globe. We investigated the species composition and distribution of rodent populations at two geographic locations in the Three Gorges Reservoir Area through field surveys and determined the dietary composition of dominant rodent species using stable isotope techniques. Our results show that the total rodent density on the islands was significantly higher than that of mainland areas. Stable isotope analysis revealed that the dietary composition of rodents was more diverse on islands than at nearby mainland sites. Moreover, the island populations had greater overlap in food sources than did the mainland populations, suggesting more intense competition for food in the newly insularized habitats. Thus, habitat fragmentation due to the construction of the Three Gorges Dam may substantially increase intra‐ and interspecific competition among local rodent populations, leading to further changes in species composition and biodiversity.
Subject(s)biodiversity , biology , competition (biology) , ecology , engineering , geography , geotechnical engineering , habitat , habitat fragmentation , interspecific competition , rodent , three gorges , trophic level
SCImago Journal Rank3.918

Seeing content that should not be on Zendy? Contact us.

This content is not available in your region!

Continue researching here.

Having issues? You can contact us here