Keen W Hubert
Department of Biological Sciences, State University of New York, College at Cortland, 13045, Cortland, NY, USA.
Oecologia. 1985 Jun;66(3):437-442. doi: 10.1007/BF00378312.
A series of experiments was conducted to test the hypothesis that habitat selection by the salamanders Desmognathus monticola and Desmognathus quadramaculatus is influenced differently by interspecific interference than by intraspecific interference. Individuals of neither species were influenced differently by the presence of heterospecifics than by the presence of conspecifics in their activity away from cover sites, in selection of different substrate moisture levels, in selection of different substrate textures, nor in selection of microhabitats relative to the streambed. Both species generally selected substrates with the highest moisture and the coarsest texture. Selection of different cover sizes by D. monticola depended on microhabitat, with larger rocks being selected most frequently when salamanders were farther from the streambed. D. quadramaculatus was seldom found away from the streambed and did not discriminate among the cover sizes available. The strong affinity of D. quadramaculatus for streambed microhabitat, compared with the much more variable microhabitat selection of D. monticola, resulted in spatial separation of individuals of the two species most of the time. Results of this study do not support the hypothesis that interspecific inference is more important than intraspecific interference in the microhabitat distributions of D. monticola and D. quadramaculatus.
进行了一系列实验，以检验以下假设：蒙蒂科拉攀螈（Desmognathus monticola）和四斑攀螈（Desmognathus quadramaculatus）对栖息地的选择，种间干扰的影响与种内干扰的影响不同。在离开隐蔽场所后的活动中、在选择不同的基质湿度水平时、在选择不同的基质质地时，以及在选择相对于河床的微生境时，这两个物种的个体受异种个体存在的影响与受同种个体存在的影响并无差异。两个物种通常都选择湿度最高且质地最粗糙的基质。蒙蒂科拉攀螈对不同隐蔽物大小的选择取决于微生境，当蝾螈离河床较远时，较大的岩石被选择的频率最高。四斑攀螈很少在远离河床的地方被发现，并且不会区分现有的隐蔽物大小。与蒙蒂科拉攀螈更为多变的微生境选择相比，四斑攀螈对河床微生境的强烈亲和力导致这两个物种的个体在大多数时间里在空间上相互分离。本研究结果并不支持以下假设：在蒙蒂科拉攀螈和四斑攀螈的微生境分布中，种间干扰比种内干扰更重要。
