The Spider Population (Arachnida: Aranei) on Stages of the Succession of Flood- Lands Vegetation in the Bureinsky Reserve (Khabarovsk Region)
The results of a long-term study of the spider population on 4 stages of succession in the flood plains of the Pravaya and Levaya Bureya rivers (Bureinskii Reserve) are disccused. The main body of wandering spider guild on pebble beds is constituted by the species residing in similar habitats in different parts of the area. With chosenia and willow young growth appearing, species characteristic for fluvial plains replace them. The number of web spiders is high, but their diversity is low here. Taxonomical diversity of spiders in Chosenia and Populus-Chosenia forests increases considerably, which is connected with the complication of the layer structure of plant communities. It reaches its peak in mature poplar forests. Also, the reorganization of dominant complexes take place among herbetobionts during succession. The total density of spider population increases. The number of species reduces, but the population density increases in the population of herpetobionts and leaf litter dwellers in the process of replacement of deciduous by dark coniferous species.