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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 1, 2007, pp. 47-52
Bioline Code: zr07008
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 1, 2007, pp. 47-52

 en Community Structure of Macrobenthic Fauna in Subtidal Areas of the Yangtze River Estuary in Spring
ZHANG Fei-jun, TONG Chun-fu, ZHANG Heng, LU Jian-jian

Abstract

Samples of subtidal macrobenthic fauna were collected and environmental factors were measured in the Yangtze River Estuary in April, 2005. The community structure of macrobenthic fauna and its correlation with environmental factors were analyzed. Thirty-eight species were identified, belonging to five ecological assemblages. The total species numbers were low, but were higher in the outer sampling sites of the estuary. The average abundance was 32.9 ind./m2 and the average biomass was 5.035 g/m2 (fresh weight) at all sampling stations. Compared with historic data from the 1970s and 1980s, the community structure of macrobenthic fauna has changed obviously and the biomass has decreased rapidly. Total abundance and biomass of the species were obvious higher at the outer sampling sites of the estuary. Salinity was the main factor affecting the distribution of the macrobenthic fauna. The distribution of the macrobenthic fauna communities corresponded to three structural orders of the Yangtze River Estuary.

Keywords
Macrobenthic fauna; Community structure; Subtidal; Yangtze river estuary

 
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