The influence of forest management on the assemblage of longicorn beetles
2006
Inada, T.(Ehime-ken. Forest Experiment Station, Kumakogen (Japan)) | Yunomura, S. | Maeto, K.
Large-scale and rapid conversion of semi-natural forests to conifer plantations should have a great impact on regional biodiversity. On the other hand, it is expected that multiple-layered forestry management will lead to the conservation of regional biodiversity. We investigated the difference in the assemblage of longicorn beetles between Ehime Kumakogen-cho or a large forestry area and the neighboring old-growth forest where original vegetation remains, as well as the associations of the assemblage of longicorn beetles with the forest types (single-layered conifer plantation, multiple-layered conifer plantation, and second-growth forest), forest age, plant species richness, and volume of fallen trees. In Kumakogen-cho, the assemblages of longicorn beetles that were dependent on mature forests were on the decline. Correspondence analysis (CA) of the longicorn beetle assemblages showed that none of the forest types formed a cluster. A significant negative correlation was accepted between the site score for the first axis of CA, in which the old-growth forest showed the minimum value, and the number of plant species. Therefore, although multiple-layered forest management does not necessarily recover the assemblage of longicorn beetles, irrespective of the forest type, it is possible that suitable management of the undergrowth to increase the number of plant species plays a role in the preservation of the original assemblage of longicorn beetles.
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