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Brazilian Journal of Oceanography

Print version ISSN 1679-8759

Abstract

GE, Bao-Ming et al. Influence of Spartina alterniflora invasion stages on macrobenthic communities on a tidal flat in Wenzhou Bay, China. Braz. j. oceanogr. [online]. 2012, vol.60, n.3, pp. 441-448. ISSN 1679-8759.  http://dx.doi.org/10.1590/S1679-87592012000300014.

Many coastal habitats in eastern China are being substantially altered by the invasion of Spartina alterniflora. The species richness, density, Margalef's diversity index (R) and Shannon's diversity index (H') of macrobenthic communities on a tidal flat in Wenzhou Bay, China, were analyzed with the factors of invasion stage and season, in 2007. A significant effect of invasion stage, season, and the interaction between them on communities was detected. The macrobenthic community was more complex in the patch  of initial S. alterniflora invasion than in the patches of  some other invasion  stages. Macrobenthic communities were classified by cluster and ordination in accordance with the habitat character of the S. alterniflora invasion stage. Our research demonstrated that the S. alterniflora invasion stage affected the macrobenthic communities significantly. The results indicated that biodiversity increased  in the initial stage of invasion (invasion age 1-2 years) and then decreased in the stage of invasion underway (invasion age 3-4 years) and in the stage of invasion completed (invasion age 5-6 years); this phenomenon was related to the change in the S. alterniflora canopy which  accompanied the invasion stages.

Keywords : Biodiversity; Western Pacific  coast; Invasion; Benthic macrofauna; Ecosystem engineers.

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