Different effects of coarse woody material on the species diversity of three saproxylic beetle families (Cerambycidae, Melandryidae, and Curculionidae) |
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Authors: | Masashi Ohsawa |
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Institution: | (1) Yamanashi Forest Research Institute, 2290-1 Saishoji, Masuho-cho, Minamikoma-gun, Yamanashi 400-0502, Japan |
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Abstract: | The relationships between coarse woody material (CWM) and the diversity of three saproxylic beetle families (Cerambycidae,
Melandryidae, and Curculionidae) were investigated. These three families responded differently toward the quality and quantity
of CWM. The species richness of cerambycid beetles increased in forests with more CWM in the early stage of decomposition.
The richness of saproxylic curculionids increased in stands with more tree species. No clear trend was evident for melandryid
diversity. The CWM differed in quality and quantity among three forest types middle-aged larch (Larix kaempferi Lamb.] Carrière) plantation, secondary forest, and old-growth forest] and between two forest-management practices (thinning
and long rotation). Forest type and management practices affected CWM and the number of tree species, and CWM and the number
of tree species influenced the diversity of saproxylic families differently. Because each decomposition stage is considered
to be important for saproxylic beetles at the species level, a constant supply of CWM is necessary to maintain a suitable
balance of CWM through these decomposition stages in forests to maintain the diversity of saproxylic beetles. |
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Keywords: | Decomposition stage Coleoptera Species richness Larch plantation Old-growth forest |
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