Spatial distribution and abundance of bud galls caused by eriophyoid mites among host trees Carpinus tschonoskii |
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Authors: | M I Ishihara M Yamasaki J Yoshikawa |
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Institution: | Tomakomai Research Station, Field Science Center of Northern Biosphere, Hokkaido University, Tomakomai, Japan |
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Abstract: | Abstract: Differences in spatial distribution and abundance of bud galls caused by eriophyoid mites (Acari: Eriophyoidea) among Carpinus tschonoskii (Betulaceae) were studied. This mite preferentially induces galls on terminal buds. Four factors influencing gall abundance were examined: host tree size, host tree's reproductive status, altitude and study site. As tree size increased, the number of galls increased to an apparent asymptote. This result suggests that tree size-dependent characteristics such as number of terminal buds, temporal pattern of shoot elongation and reproductive status influence gall abundance. |
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Keywords: | gall abundance gall mite generalized additive model |
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