Yu Guo-song1,2 Wang Shi-jie1 Rong Li1,3
（1. State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry Chinese Academy of Sciences, Guiyang, 550002, China;
2. Graduate University of Chinese Academy of Sciences, Beijing 100049,China;
3. School of Geographic and Environmental Sciences, Guizhou Normal University, Guiyang, 550001, China）
Abstract: The main climate factors, such as air temperature, air relative humidity, light intensity and soil temperature are studied in different microhabitats of different successional stages in Maolan karst forest, Guizhou. The result show that: as the communities develop, air temperature and light intensity in different successional stages are decreasing, and the variation of them become small; air relative humidity is increasing and the variation of it becomes small with the evolution; The soil temperature of 5 cm~20 cm drop with the evolution of the communities and the vertical variation of soil temperature decreases with the depth. Ecologic environment and microclimate conditions of primary forest were best, secondary forest and shrubbery’s were taking second place, conditions of herbage were worst. The change of temperature, light intensity and air relative humidity of primary forest were mitigable, it was beneficial to growth of vegetation and development of communities. However, the change of microclimate conditions of herbage were violent, it must go through a long time to finish ecological succession. The difference of ecologic microclimate was evident for different microhabitats. The ecologic microclimates conditions of earth flatland and gully were very well, its light, temperature and humidity changed mildly, soil surface was suitable for plant growth; For rocky flatland and crevice, its temperature, light intensity and air relative humidity changed dramatically and plant growth was restricted.
Key Words：karst forest, successional stages, microhabitats, microclimates
EARTH AND ENVIRONMENT Vol. 39, No.4, Tot No.286, 2011, Page 469-477
