| 西双版纳热带季节雨林粗木质物残体储量及其空间分布 |
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| 引用本文： | 邓云,张文富,邓晓保,李玉武.西双版纳热带季节雨林粗木质物残体储量及其空间分布[J].生态学杂志,2012,31(2):261-270. |
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| 作者姓名： | 邓云 张文富 邓晓保 李玉武 |
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| 作者单位： | 1. 中国科学院西双版纳热带植物园,云南勐腊,666303
2. 中国科学院西双版纳热带植物园,云南勐腊666303;中国科学院研究生院,北京100049 |
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| 基金项目： | 中国科学院野外台站项目资助 |
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| 摘 要： | 粗木质物残体(CWD)在森林生态系统的物质循环和碳动态中发挥着重要作用,但目前国内对热带地区CWD储量与其空间分布关系上的研究还处于起步阶段。对西双版纳1hm2热带季节雨林样地调查发现,≥10cm的粗木质物残体占森林总凋落物量的68.02%,其中45.72%的CWD处于腐解中后期。由于多数大径级的CWD分布于15°～25°的坡地上,且其饱和持水力随腐解等级的增加而上升,因此,CWD将有助于改善坡地生境下的水肥条件。CWD的分布受风向和本地湿热环境的影响,但掉落指向则更倾向于随机过程。CWD产生和分布上的普遍性有可能对森林生境异质性和生物多样性产生重大影响。
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| 关 键 词： | 热带季节雨林 粗木质物残体 储量 分布 |
Storage of coarse wood debris and its spatial distribution in a tropical seasonal rain forest in Xishuangbanna of Southwest China |
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| DENG Yun
,
ZHANG Wen-fu
,
DENG Xiao-bao
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LI Yu-wu.Storage of coarse wood debris and its spatial distribution in a tropical seasonal rain forest in Xishuangbanna of Southwest China[J].Chinese Journal of Ecology,2012,31(2):261-270. |
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| Authors: | DENG Yun ZHANG Wen-fu DENG Xiao-bao LI Yu-wu |
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| Affiliation: | 1,2 (1 Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Mengla 666303, China; 2Graduate University of Chinese Academy of Sciences, Beijing 100049, China) |
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| Abstract: | Coarse wood debris (CWD) plays an important role in the nutrient cycling and carbon dynamics in forests, but little is known on the relationships between CWD storage and its spatial distribution. In this paper, an investigation was conducted on the CWD distribution in a 1-hm2 plot of a tropical seasonal rain forest in Xishuangbanna. In the plot, the CWD with diameter ≥ 10 cm made up 68.02% of the total biomass of litterfalls, and around 45.72% of the CWD was at the medium or late stage of decomposition. The majority of large size CWD distributed on the slopes of 15°-25°, and their saturated water contents increased with their decay degree, which would help to improve the local water and nutrient condition. The distribution of CWD was affected by wind direction and local humid and hot environment, but the angle of the CWD laid on the ground tended to be random. The CWD storage and distribution would greatly contribute to the habitat heterogeneity and species diversity in tropical seasonal rainforests. |
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| Keywords: | tropical seasonal rainforest coarse wood debris storage distribution |
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