Comparison of Habitat Utilization Between Sympatric Populations of Rana pleuraden and R. chaochiaoensis in the Kunming Area
Zoological Research(2006)
摘要
Previous studies of the habitat utilization of amphibians in China have
lacked robust descriptive and qualitative data. The aufhors measured 12
ecological factors in a one meter radius of each frog found in order to
describe habitat utilization. One hundred and thirty-three individuals
of Rana pleuraden and 62 of R. chaochiaoensis were found and
recorded. Two independent sample T tests and nonparametric Mann-Whitney
U tests were used for comparison of habitat utilization between the two
frog species. The results indicate that in dry grass niches, only the
highest plant height is significantly. In moist grass niches, the
distance to water and percentage of water in the habitat is highly
significantly different; percentage of float grass and wet mud is also
significantly different. In water bodies, various ecological factors
are significantly different. The results of a principal components
analysis show that in different niches, the main ecological factors
selected by R. pleuraden and R. chaochiaoensis are usually the same or
their order is reversed. However, the importance of these factors is
almost opposite, which means that their niches are different. Habitat
utilization is therefore different and is actively selected by the two
frog species. R. pleuraden chooses to live mainly in water bodies while
R. chaochiaoensis lives in moist grass and dry grass niches. Both
species of frog utilize muddy niches less than other niches. The body
size of R. pleuraden does not affect their use of water habitats.
However, larger R. chaochiaoensis utilize moist grass and dry grass
niches more often than smaller individuals due to the ability of these
habitats to conceal larger animals. They also utilize water bodies less
than smaller individuals.
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关键词
Kunming,Sympatric population,Rana pleuraden,Habitat utilization,R. chaochiaoensis
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