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介绍了互花米草在盐城市海滨湿地的入侵特征,分析了该地区互花米草扩张速率与岸段滩面物理特性的相关性,构建了互花米草入侵的生态风险模型,并对互花米草入侵的生态风险进行了量化。结果表明,淤长型滩涂、潮滩宽度大、沉积量大有利于互花米草的扩张,侵蚀型滩涂则使互花米草的扩张受限;潮滩平均坡度越大,对互花米草的扩张越不利。互花米草滩的底栖动物多样性明显降低,其中大丰市段互花米草入侵风险最高、滨海县段最低。
The invasion characteristics of Spartina alterniflora in coastal wetlands in Yancheng were introduced. The correlation between Spartina alterniflora expansion rate and beach physical properties was analyzed, and the ecological risk model of Spartina alterniflora invasion was established. The ecological risk of S. alterniflora invasion was quantified. The results show that silt long tidal flats, large tidal flats and large deposition amount are favorable for the expansion of Spartina alterniflora, while erosion type tidal flats restrict the expansion of Spartina alterniflora. The larger the average tidal flat, The more unfavorable the grass expansion. The diversity of benthic fauna in Spartina alterniflora was obviously reduced, among which the Spartina alterniflora invasion risk was highest in Dafeng city and the lowest in Binhai county.