Changes in soil organic carbon, total nitrogen, and abundance of arbuscular mycorrhizal fungi along a large-scale aridity gradient
Changes in soil organic carbon, total nitrogen, and abundance of arbuscular mycorrhizal fungi along a large-scale aridity gradient
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大尺度干旱梯度下土壤有机碳、全氮和丛枝菌根真菌丰度的变化
DOI：
10.1016/j.catena.2011.05.009
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发表时间：
2011-10
期刊：
影响因子：
6.2
通讯作者：
Xin Chen
中科院分区：
文献类型：
--
作者：
Haishui Yang;Qian Zhang;Yongge Yuan;Yu Liu;Jianjun Tang;Xin Chen
研究了土壤有机碳、全氮、pH值和丛枝菌根真菌丰度在沿着大尺度干旱梯度上的变化。土壤有机碳、全氮含量随干旱程度的增加而降低，pH值随干旱程度的增加而升高。地下植物生物量、孢子丰度和丛枝菌根真菌在根系的定殖也随着干旱的增加而下降。土壤有机碳和全氮与地上植物生物量呈正相关，丛枝菌根真菌孢子数和根系定殖率与土壤有机碳、全氮和地上植物生物量呈正相关，与土壤pH呈负相关。干旱对丛枝菌根真菌的丰度产生了较大的直接影响和较小的间接影响（通过地上植物生物量的变化）。土壤pH值也直接影响丛枝菌根真菌的丰度。这些结果表明，地上植物生物量可能是驱动土壤有机碳、全氮和丛枝菌根真菌丰度沿着这一干旱梯度变化的关键因子。
Changes in soil organic carbon, total nitrogen, pH, and the abundance of arbuscular mycorrhizal fungi are examined along a large-scale aridity gradient from southeast to northwest in China. Soil organic carbon and total nitrogen decreased but pH increased with increased aridity. Aboveground plant biomass, spore abundance, and colonization of roots by arbuscular mycorrhizal fungi also declined as the aridity increased. Soil organic carbon and total nitrogen were positively correlated with aboveground plant biomass, and arbuscular mycorrhizal fungal spore number and root colonization were positively correlated with soil organic carbon, total nitrogen, and aboveground plant biomass but were negatively correlated with soil pH. A structural equation model suggested that aridity affected soil organic carbon and total nitrogen by limiting aboveground plant biomass. Aridity exerted a large direct effect and smaller indirect effects (via changes in aboveground plant biomass) on the abundance of arbuscular mycorrhizal fungi. Soil pH also directly influenced arbuscular mycorrhizal fungal abundance. These results suggest that aboveground plant biomass could be a key factor driving the changes of soil organic carbon, total nitrogen, and arbuscular mycorrhizal fungal abundance along this aridity gradient in China.
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DOI：
--
发表时间：
2005-02
期刊：
Ying yong sheng tai xue bao = The journal of applied ecology
影响因子：
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作者：
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通讯作者：
Shuping Wang;Guangsheng Zhou;Suhua Gao;Jianping Guo
DOI：
10.1111/j.1469-8137.2006.01799.x
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2006-10
期刊：
The New phytologist
影响因子：
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作者：
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Juan C. Santos;R. Finlay;A. Tehler
青藏高原三类草原群落丛枝菌根真菌的发生与分布
影响因子：
2
作者：
Gai, J. P.;Christie, P.;Li, X. L.
通讯作者：
Li, X. L.
DOI：
--
发表时间：
2003-05
期刊：
Ying yong sheng tai xue bao = The journal of applied ecology
影响因子：
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作者：
Qingmei Chen;Shaoqiang Wang;Guirui Yu
通讯作者：
Qingmei Chen;Shaoqiang Wang;Guirui Yu
影响因子：
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作者：
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通讯作者：
MELILLO, JM