Pedosphere 14(3): 355--361, 2004
ISSN 1002-0160/CN 32-1315/P
©2004 Soil Science Society of China
Published by Elsevier B.V. and Science Press
| Vegetation evolution with degenerating soil ecology under unequal competition |
LIN Zhen-Shan1 and QI Xiang-Zhen |
| The College of Geography Science, Nanjing Normal University, Nanjing 210097 (China). E-mail: linzhenshan@njnv.edu.cn |
| ABSTRACT |
| A vegetation evolution model influenced by a degeneration of soil ecological functions was set up. Three ideal communities of a) trees, b) shrubs, and c) herbage populations were first simulated. Then numerical simulations of the evolutionary and developmental processes of a natural forest community, which is composed of over 100 species, were conducted. Results of the study showed that a) in all communities, soil degeneration not only drove some weaker species to extinction, but also a few dominant ones; b) there were different response scales with species in an ideal tree metapopulation that could persist as long as a thousand years, with shrubs in an ideal shrub metapopulation that could persevere for several hundred years, and with species in an ideal herbage metapopulation that could become extinct within 10 years; and c) each metapopulation experienced three evolutionary stages during adaptation to the environment: a) the stage of compelled adaptation or resistance, b) the adjusted stage, and c) the stabilized stage. |
| Key Words: model, numerical simulation, soil ecological function, vegetation |
| Citation: Lin, Z. S. and Qi, X. Z. 2004. Vegetation evolution with degenerating soil ecology under unequal competition. Pedosphere. 14(3): 355-361. |
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