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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 28, No. 2, 2007, pp. 167-171
Bioline Code: zr07028
Full paper language: English
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 28, No. 2, 2007, pp. 167-171

 en The Community Structure of Benthic Macroinvertebrates Associated with Spartina alterniflora check for this species in other resources in the Yangtze Estuary, in China
XIE, Zhi-fa; ZHANG, Fei-jun; LIU, Wen-liang & LU, Jian-jian

Abstract

Benthic macroinvertebrate communities in Spartina alterniflora check for this species in other resources zones in the Yangtze Estuary, in China, were investigated seasonally in 2005, and their structure and biodiversity were analyzed. Twenty-one species were identified, across four Classes; 10 species of Crustacea, five species of Polychaeta, five species of Gastropoda, and one species of Lamellibranchia. Dominant species included: Assiminea check for this species in other resources sp., Notomastus latericeus check for this species in other resources , Cerithidea largillierl check for this species in other resources , Glauconome chinensi check for this species in other resources and Gammaridae check for this species in other resources sp. Functional groups were comprised of a phytophagous group and a detritivorous group. The average density of all benthic macroinvertebrates was 650.5±719.2 inds/m2 in the survey area. The high value of the standard deviation of the average density was a result of abundant Assiminea check for this species in other resources sp. at Beihu tidal flats. The average density of macroinvertebrates from Beihu tidal flat, Chongming Dongtan to Jinshanwei tidal flat decreased gradually. There was significant difference between compositions and abundance of macroinvertebrates along the estuary gradient (P<0.05). The density and biodiversity were highest in summer and lowest in winter. The mean biomass of macroinvertebrates was 20.8±6.1 g/m2. Biomass changed seasonally in the same way as density, with the change in biomass being: summer (Aug.) >autumn (Oct.) >spring (Apr.) > winter (Dec.). A BIO-ENV analysis showed that the mean grain size of sediment, height of Spartina and salinity were the major factors which affected the structure of the macroinvertebrate community. Variations in the community structure were probably caused by the population dynamics of S.alterniflora along with the variation in sampling time and location.

Keywords
Benthic macroinvertebrate, Spartina alterniflora, Yangtze Estuary, Community structure

 
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