Harvey E, Miller T E
Department of Biological Science, Florida State University, 32306-2043, Tallahassee, FL, USA.
Oecologia. 1996 Nov;108(3):562-566. doi: 10.1007/BF00333734.
A survey of the abundances of species that inhabit the water-bearing leaves of the pitcher plant Sarracenia purpurea was conducted at several different spatial scales in northern Florida. Individual leaves are hosts to communities of inquiline species, including mosquitoes, midges, mites, copepods, cladocerans, and a diverse bacterial assemblage. Inquiline communities were quantified from four pitchers per plant, three plants per subpopulation, two subpopulations per population, and three populations. Species varied in abundance at different spatial scales. Variation in the abundances of mosquitoes and copepods was not significantly associated with any spatial scale. Midges varied in abundance at the level of populations; one population contained significantly more midges than the other two. Cladocerans varied at the level of the subpopulation, whereas mites varied at the level of the individual plants. Bacterial communities were described by means of Biolog plates, which quantify the types of carbon media used by the bacteria in each pitcher. Bacterial communities were found to vary significantly in composition among individual plants but not among populations or subpopulations. These results suggest that independent factors determining the abundances of individual species are important in determining community patterns in pitcher-plant inquilines.
在佛罗里达州北部的几个不同空间尺度上，对紫瓶子草（Sarracenia purpurea）含水叶片上栖息的物种丰度进行了一项调查。单个叶片是寄居物种群落的宿主，这些物种包括蚊子、蠓、螨虫、桡足类、枝角类以及多样的细菌组合。从每株植物的四个捕虫瓶、每个亚种群的三株植物、每个种群的两个亚种群以及三个种群中对寄居群落进行了量化。不同空间尺度上物种的丰度各不相同。蚊子和桡足类的丰度变化与任何空间尺度均无显著关联。蠓在种群水平上丰度各异；一个种群中的蠓数量显著多于其他两个种群。枝角类在亚种群水平上存在差异，而螨虫在单株植物水平上存在差异。通过Biolog平板描述细菌群落，该平板可量化每个捕虫瓶中细菌利用的碳源培养基类型。结果发现，细菌群落在单株植物之间的组成差异显著，但在种群或亚种群之间并无差异。这些结果表明，决定单个物种丰度的独立因素对于确定瓶子草寄居生物的群落模式很重要。
