Differences in soil mite communities in Karst Areas with different degrees of rocky desertification
Author of the article:CHEN Hu;JIN Dao-Chao; WEN Zheng-Hong
Author's Workplace:Institute Entomology Guizhou University; The Provincial Special Key Laboratory for Development and Utilization of Insect Resources, Guizhou University, Guiyang 550025, China; School of Karst Science, Guizhou Normal University, State Engineering Technology Institute for Karst Rocky Desertification Control; The State Key Laboratory Incubation Base for Karst Mountain Ecology Environment of Guizhou Province, Guiyang 550001, China
Key Words: soil mites, community structure, differences, rocky desertification, Guizhou
Abstract:
[Objectives] To quantify differences in soil mite community structure
between karst areas with different degrees of rocky desertification. [Methods] We collected soil mites from sites with potential,
light, moderate and intense rocky desertification from a mountain plateau with
mainly potential-light rocky desertification, and in a canyon with mainly medium-intense
rocky desertification. Differences in family, genus, species, ecological groups,
and the community diversity of soil mites between these different environments
were quantified and compared. [Results] Overall 132 genera of 72 families of
soil mites were collected. Oribatid mites comprised the majority of soil mites
in the research area. Families and genera of soil mites were more diverse in
the medium-intense rocky desertification karst area. Community composition
changed seasonally in different habitat types but the number of families and
genera gradually reduced with increasing rocky desertification. Different dominant
genera were discovered in two karst areas, moreover, their distribution changed
with habitat and season. The relative abundance of predatory and oribatid mites
groups varied with environment and season. The community diversity index was
slightly higher at sites with medium-intense rocky desertification, but the
overall difference was not obvious. [Conclusion] Soil mite community structure varies with different degrees of rocky
desertification. This association means that the dominant genera can, to some
extent, predict the degree of rocky desertification. However, the distributions
of predatory and oribatid mites were uncorrelated with the degree of rocky
desertification. The reason
for this requires further investigation.