Authors: Xiuqin Yin*,
Topics: Biogeography, Animal Geographies, China
Keywords: Changbai Mountain; altitudinal zonation; soil microbies; PLFA; soil factors
Session Type: Poster
Start / End Time: 1:20 PM / 3:00 PM
Room: Napoleon Foyer/Common St. Corridor, Sheraton, 3rd Floor
Presentation File: No File Uploaded
The Changbai Mountain is a mountainous ecosystem strongly affected by volcanic eruptions and with distinct vegetation zonations along different altitudes. The objectives of the present study were to: (1) examine the distribution of microbial phospholipid fatty acids (PLFA) and enzyme activities of soils along different altitudes and investigate factors affecting the PLFA and enzymes, and (2) explore the effects of influencing factors, vegetation, and soil on the microbial community structure and enzyme activities in four vertical zones( the coniferous forest zone, ermans birch forest zone, alpine meadow zone, and alpine tundra zone ) The results demonstrated that soil organic carbon and TN varied with altitude, with the highest value detected in the ermans birch forest zone. Both the total microbial PLFA and various types of microbes PLFA initially increased and then decreased as elevation increased. TN showed a significant positive correlation with various types of microbes while the C/N ratio was negatively correlated with various types of microbes. Soil water content, soil organic carbon, and C/N ratio were the main factors affecting the vertical distribution of soil enzyme activities. The meadow processes of alpine tundra strongly affected the soil water content, soil total phosphorus, and AP activity; however, had little effect on soil microbial PLFA and other enzyme activities. In conclusion, the soils microbial community structure and enzyme activities along different altitudes of Changbai Mountain were not only affected by soil environmental factors and hydrothermal conditions, but were also closely related to the vegetation community composition and litter chemical quality.