景观视角下湿地植物入侵性评价研究

本文采用层次分析法(AHP法)从景观的视角对长沙市湿地中应用较多的再力花、香菇草、蒲苇、粉绿狐尾藻和睡莲等5种外来植物的入侵性进行了综合评价。结果表明:根据综合得分将入侵性划分为Ⅰ~Ⅳ四个等级(得分由低到高),其中得分为Ⅱ级的有再力花和香菇草,得分为Ⅲ级的有蒲苇、睡莲和粉绿狐尾藻,5种植物的初步评价结果与实际表现比较一致;权重方面,群落生态>个体生态>群落景观,群落景观上5种植物得分相差不大且处于及格线上下,群落生态中的2个多样性指标权重较大且得分差距也较大,个体生态除睡莲外其他得分非常低,此现象不容忽视。

Study on the evaluation of wetland plants invasion from the perspective of landscape

In this study,Analytic Hierarchy Process(AHP)was used to evaluate the invasion of 5 frequently occurred wetland plants of Thalia dealbata,Hydrocotyle vulgaris,Cortaderia selloana,Myriophyllum aquaticum and Nymphaea tetragona from the perspective of landscape.The evaluation results showed that the invasion of 5 plants was divided into 4 grades(Ⅰ~Ⅳ)from low to high according to their comprehensive scores.Hydrocotyle vulgaris and Thalia dealbata were classified into grade II,and Cortaderia selloana,Myriophyllum aquaticum and Nymphaea tetragona were classified into grade III.The results of the preliminary evaluation of 5 plants were consistent with the actual performance.The rank of weight was community ecology>individual ecology>community landscape.The scores of the 5 species in community landscape were similar and below the pass line.The 2 diversity indexes in community ecology had a large weight with a big gap between each other.The scores of other species in individual ecology except Nymphaea tetragona were very low,which should not be ignored.