江西省永丰样区两栖动物多样性的时空差异

    Spatial and Temporal Divergence of Amphibian Diversity in Yongfeng Sample Area of Jiangxi Province

    • 摘要: 两栖动物作为环境监测的指示生物,具有重要的生态学意义。为了解江西省永丰样区两栖动物多样性的时空格局,于2018年4、6和8月选取溪流、水田和人工水渠3种不同生境类型,设置15条样线开展监测,记录样线内环境数据及两栖动物种类和数量。结果显示:(1)共调查到两栖动物2目7科16属18种,其中濒危和易危种各1种;(2)溪流、水田和人工水渠生境的优势物种分别为武夷湍蛙、泽陆蛙和福建大头蛙,但不同月份间存在差异;(3)皮尔森相关分析显示,水田生境下相对多度与气温、物种丰富度和相对多度与水温均呈负相关,人工水渠生境下相对多度与气温呈正相关;(4)水田和人工水渠生境的物种丰富度、相对多度、辛普森指数和香农-维纳指数明显高于溪流生境,4、6和8月相对多度逐渐减少,生境类型和月份的交互作用是相对多度的变异来源;(5)水田-人工水渠的Cody指数明显低于其余生境间的两两比较。综上所述,江西永丰样区的两栖动物多样性存在明显的时空差异。

       

      Abstract: Amphibians, as bioindicators in environmental monitoring, have a critical role in maintaining ecological balance. To reveal the spatial and temporal pattern of amphibian diversity, 15 sampling transects were employed in Yongfeng sample area (Jiangxi Province, China), which are located as stream, paddy field and artificial channel in April, June and August of 2018, to obtain the environmental data, the species and amounts of amphibians. The results showed that: (1) A total of 18 amphibian species were found in the survey which belong to two orders, seven families, and 16 genera, including one endangered and one vulnerable species. (2)Amolops wuyiensis, Fejervarya multistriata and Limnonectes fujianensis were the dominant species in stream, paddy field and artificial channel, respectively. (3) The Pearson correlation analysis show that the relative abundance was negatively related with the air temperature and the water temperature, respectively, and the species richness was negatively related with the water temperature in paddy field; but the relative abundance was positively related with air temperature in artificial channel. (4) The species richness, relative abundance, Simpson index and the Shannon-Wiener index of amphibians in paddy field and artificial channel were higher than those in stream; the relative abundance decreased with month, the interaction between habitat type and month induced the variation of the relative abundance. (5) Cody index in the paddy field vs. artificial channel was lower than that in the paddy field vs. stream and the stream vs. artificial channel. In conclusion, amphibian diversity has significant spatial and temporal variation in Yongfeng sample area of Jiangxi Province.

       

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