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中新天津生态城夏季不同生境中啮齿动物群落与环境因子的关系

覃雪波, 曾朝辉   

  1. (1 天津自然博物馆,天津 300074
  • 出版日期:2011-12-06 发布日期:2011-03-02

Relationships between rodent communities and environmental factors in different habitats of Sino-Singapore Tianjin Eco-city during summer

QIN Xuebo,ZENG Zhaohui   

  1. Tianjin Natural History Museum ,Tianjin 300074,China
  • Online:2011-12-06 Published:2011-03-02

摘要: 2008 年6 月至8 月在中新天津生态城采用铗日法调查啮齿动物,运用冗余分析研究啮齿动物群落与环境因子的关系。在7 个生境中,啮齿动物种群密度(只/100 铗/ hm2 ) 以村落(8.33)、蓟运河岸(8.00)、公路(7.00)和芦苇地(6.00)等4 个生境较高,而碱蓬地(1.00)、河口(1.00)和盐池(0.66)等3 个生境较低。物种多样性指数(H)以村落(1.97) 和公路(1.68) 最高,芦苇地(1.40)和蓟运河岸(1.18)次之, 盐池(1.00)、碱蓬地(0.92)和河口(0.92)最低。群落相似系数表明,不同生境啮齿动物群落结构有所不同,这种差异与环境因子相关。冗余分析(RDA) 表明,水体盐度(F = 6.30, P = 0.016) 和植被盖度(F =4.60, P = 0. 026) 对啮齿动物群落组成的影响达到显著水平(P < 0. 05), 而其它环境因子达不到显著水平(P> 0.05)。因此,水体盐度和植被盖度是影响中新天津生态城夏季啮齿动物群落结构的关键环境因子。

关键词: 啮齿动物, 群落, 环境因子, 冗余分析, 中新天津生态城, 夏季

Abstract:

Relationships between environmental factors and the rodent community sampled by a trap-day method was studied by redundancy analysis (RDA) in different habitats of Sino-Singapore Tianjin Eco-city from June to August 2008. Relatively high population densities of rodents (ind. /100 traps / ha) were found in the village area (8.33), the Ji canal side(8.00), the highway (7.00) and the bulrush area (6 00). Low population densities were found in the alkali area (1.00), the estuary (1.00), and the salt pond (0.66). The highest diversity index was found in the village area (1.97) and the highway (1.68), following by the bulrush area (1.40) and the Ji canal side (1.18), the lowest were the salt pond (1.00), the alkali area (0.92), and the estuary (0.92). There were differences in community structures of rodents among the 7 habitats based on the similarity indices, indicating that the structures of rodent communities were affected by environmental factors. RDA with forward selection showed that variation of rodent communities was significantly related to water salinity (F = 6.30,P = 0.016) and plant coverage (F = 4.6, P = 0.026),suggesting that these two environmental factors are the most important environmental factors defining the structure of rodent communities in Sino-Singapore Tianjin Eco-city during summer.

Key words: Community, Environmental factors, RDA, Rodents, Sino-Singapore Tianjin Eco-city, Summer