南亚热带常绿阔叶林及其森林演替序列的水分结构探讨 |
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| 出 版 社：中国环境科学出版社 |
| 发表时间：2002 |
| 台 站：
鼎湖山森林生态系统定位研究站
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| 作 者：周国逸，黄志宏，张倩媚，闫俊华，张德强，王应平 |
| 点 击 率：6971 |
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| 关 键 字：水分结构；生态系统健康；南亚热带常绿阔叶林；热带南亚热带；森林演替系列 |
| 摘 要：本文以南亚热带常绿阔叶林为基本，同时探讨了热带南亚热带森林演替系列中8种生态系统类型的水分结构，发现植被水分结构的恢复与土壤水分结构的恢复是不同步的，50a以上没有受扰动的土壤，其土壤水分结构在时空上才趋于稳定；植被水分结构的时空稳定性基本上与生态系统的演替状况一致；为满足植被蒸腾的需要，植被中水分的月更新次数随着群落向顶极系统的演替而逐渐减少。因此，可以认为水分结构是生态系统结构的一部分，生态系统对于水分变化反映的敏感性远远大于对养分变化的反映，森林向顶极系统演替中，水分结构也逐渐复杂化，植被中的水分含量逐渐增加并趋于稳定，生态系统中的水分环境逐渐趋于中生化，水分结构可以作为生态系统健康的量度指标。 |
| 关 键 字(英文)：Water structure；Ecosystem health；Monsoon evergreen broadleaved forest；Tropics and subtropics；Forest succession series. |
| 摘 要(英文)：Water structure of ecosystem，which was proposed by the corresponding author，is a new concept compared with so called spatial，time and nutritional structures. To identify the dynamics of ecosystematic water structures，eight ecosystems in succession series and regional climax－monsoon evergreen broadleaved forest have been taken into consideration. The results showed that the rehabilitations of vegetation and soil water structures were not synchronous， and the soil water structure would not reach the spatial-time stable state if soil profile perturbation has not ceased for at least 50 years. The spatial-time stability of water structure in vegetation coincided with ecosystematic succession state. And to provide transpiration， the water monthly turnover times in vegetation would become fewer with succession to regional climax. From the study， it can be concluded further that water structure is a part of the structure of an ecosystem， that the reflection of ecosystem to water environment is much more sensitive than that to nutrient dynamics，and that，with vegetation succession，the water structure becomes more complex. Also， during this process， the water content in vegetation increases and keeps stable gradually， and the water environment in ecosystem will become suavely. The water structure of an ecosystem can be taken as an index of evaluating the ecosystem health. |
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 南亚热带常绿阔叶林及其森林演替序列的水分结构探讨.pdf |
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