Plant community characteristics and their relationships with soil properties in a karst region of southwest China
Contemporary Problems of Ecology(2017)
Abstract
In this study, we analyzed plant community characteristics and the relationship between plant and soil properties based on forest successional stages in depressions between karst hills. The secondary forests showed the maximum number of species, genera, and families with important values >5 and the highest species diversity, and primary forest was the optimal community structure. The arboreal layer played a dominant role in determining fragile karst ecosystem status, followed by shrubs, Al 2 O 3 , and Fe 2 O 3 . A close relationship existed between species diversity and soil organic C, total N, total P, Fe 2 O 3 , MnO, microbial biomass C, and microbial biomass P. Plant characteristics could be explained by the soil nutrient factors (21.6%), soil microbes (17.1%), soil mineral components (10.2%), and interactions among these variables (29.3%).
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Key words
community stability,karst region,forest succession,principal component analysis,soil properties
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