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|Title:||Effects of condensed tannins in conifer leaves on the composition and activity of the soil microbial community in a tropical montane forest|
Balser, Teri C.
|Author's alias:||潮, 雅之|
Soil enzyme activity
Soil microbial community
Tropical montane forest
|Journal title:||Plant and Soil|
|Abstract:||[Background and aims]Condensed tannins, a dominant class of plant secondary metabolites, play potentially important roles in plant-soil feedbacks by influencing the soil microbial community. Effects of condensed tannins on the soil microbial community and activity were examined by a short-term tannin-addition experiment under field and laboratory conditions. [Methods]Condensed tannins were extracted from the leaves of a dominant conifer (Dacrydium gracilis) in a tropical montane forest on Mt. Kinabalu, Borneo. The extracted tannins were added to soils beneath the conifer and a dominant broadleaf (Lithocarpus clementianus) to evaluate the dependence of the response to tannin addition on the initial composition of the soil microbial community. [Results]Enzyme activities in the field tannin-addition treatment were lower than in the deionized-water treatment. Carbon and nitrogen mineralization were also inhibited by tannin-addition. The fungi-to-bacteria ratio after tannin-addition was higher compared with the distilled-water treatment in the laboratory experiment. [Conclusions]Based on our results, we suggest that the higher concentration of condensed tannins in the leaf tissues of Dacrydium than in those of Lithocarpus is a factor influencing the microbial community and activity. This may have influences on subsequent plant performance, which induces plant-soil feedback processes that can control dynamics of the tropical montane forest ecosystem.|
|Rights:||The final publication is available at www.springerlink.com|
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|Appears in Collections:||Journal Articles|
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