Vol.15, No. 1,January2016
Effects of Spartina alterniflora invasion on distribution of Moerella iridescens in a tidal flat of Western Pacific Ocean
Description:Jiangsu Key Laboratory for Bioresources of Saline Soils, Jiangsu Synthetic Innovation Center for Coastal Bio-agriculture, Yancheng Teachers University, Yancheng, Jiangsu 224051 P. R. China. 2-Institute of Ecology, Zhejiang Normal University, Jinhua, Zhejiang 321004 P.R. China. * Corresponding author’s email: gebaoming@gmail.com
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Abstract
The invasion ofSpartina alterniflora significantly affected the local ecosystem of Western Pacific Ocean whereMoerella iridescens lives. Five patches with different invasion stages ofS. alterniflora were selected and the influence on distribution of
M. iridescens was studied on the coast of Wenzhou Bay, China in 2007. The aggregated distribution pattern was proved by using Taylor's power regression and Iwao's plot regression methods (p<0.001). The densities were significantly affected by the factors ofS. alterniflora invasion stage and season (p<0.001), but no significant effect of interaction (p=0.805) occurred.M. iridescens mainly clumped in the habitats of no invasion and initial invasion ofS. alterniflora was in the high tidal zone, and the lowest density was recorded where complete invasion occurred. The densities were larger in warmer than in cooler seasons. There were significant positive correlations among the average densities in seasons. Density variation must be the response ofM. iridescens to the environment, includingS. alterniflorainvasion stage, temperate stress and interspecific associations.
Keywords: Coastal wetland, Distribution pattern, Habitats, Lingkun Island
Author:Ge B.M.1; Zhang D.Z.1; Tang B.P.1; Bao Y.X.2; Cui J.1; Hu Z.Y.2
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