| 要旨トップ | 目次 | 日本生態学会第59回全国大会 (2012年3月,大津) 講演要旨
ESJ59/EAFES5 Abstract


一般講演(ポスター発表) P2-174A (Poster presentation)

Feeding behaviors and food availability in soil determine community composition of oribatid mites in northern forests of Japan

*Ota T. A., Mori S. A., (Yokohama National Univ.), Osono T., (CER, Kyoto Univ.), Hobara S., (Rakuno Gakuen Univ.), Mizumachi, E., Hagiwara Y. (Kyoto Univ.)

Oribatid mites, which inhabit in soil and feed litters, play an important role in soil systems. Some studies reported that community composition of oribatid mites varied with local conditions such as vegetation, although this has been less quantified. We aimed to examine whether community composition would vary with food quality that is expected to be determined by vegetation. Particularly, we compared species specific preference for feeding habitat and community composition among different vegetational conditions. We collected oribatid mites in plots located at each 200m-elevation interval from 200m to 1,200m. We measured mass, thickness, pH, water content and N/C of Ao layer: Feeding preferences of each species were classified into macrophytophages, microphytophages, panphytophages and fragment feeders. Cluster analysis showed that communities of oribatid mites of each plot were divided into three groups, which was consistent with vegetation type. CCA showed that responses to environmental factors varied among species, and were not consistent with feeding preference. These results suggested that food quality was not a determinant for community composition of oribatid mites living in forest ecosystems.


日本生態学会