作 者：Feng, J.X.,Huang, Q., Qi, F., Guo, J.M.,Lin, G.H.影响因子：2.719

刊物名称：BIOLOGICAL INVASIONS

出版年份：2015

卷:17 期:7页:2113-2121

The cordgrassSpartina alterniflorahas invaded mangrove-dominated habitats in China during the last few decades. However, the ecological effect of theS. alternifloraon the mangrove fish community is poorly understood. In order to assess the relative nutritional contributions of native autotrophs

(benthic microalgae: BMA, particulate organic matter: POM, C₃native mangroveAegiceras corniculatum, Avicennia marinaandKandelia obovata) and C₄exoticS. alterniflora, we examined the stable carbon and nitrogen isotope values of six common fish species(Osteomugil ophuyseni, Coilia grayii,

Parachaeturichthys polynern, Sparus latus, Lateolabrax japonicasandOphichthus apicalis) in the tidal creek of Zhangjiang Estuary. Results of the MixSIR model suggested that exoticS. alternifloracombined with BMA constituted major food sources of the fish community.S. alterniflorahad a higher median contribution than all the other food sources to all fish species except forP. polynernaandS. latus, which derived their major food sources from BMA. These results indicated that the invasive cordgrass has been incorporated into the local aquatic food web through providing important nutrient source for fish species in the mangrove ecosystem of Zhangjiang Estuary.

Fig.2.Mean δ¹³C and δ¹⁵N values (error bar represents 1SE)of primary producers and six fish species in the mangrove ecosystem of Zhangjiang Estuary (BMAbenthic microalgae,POMparticulate organic matter,Ac A. corniculatum Am A.marina, Ko K. obovata, Sa S. alterniflora)