Depth-dependent response of particulate and mineral-associated organic carbon to long-term throughfall reduction in a subtropical natural forest
Depth-dependent response of particulate and mineral-associated organic carbon to long-term throughfall reduction in a subtropical natural forest
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亚热带天然林颗粒物和矿物相关有机碳对长期径流减少的深度依赖性响应
DOI：
10.1016/j.catena.2022.106904
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发表时间：
2023-04
期刊：
影响因子：
6.2
通讯作者：
Yusheng Yang
中科院分区：
文献类型：
--
作者：
Siyi Sun;Xiaofei Liu;Shengxu Lu;Pingli Cao;Dafeng Hui;Ji Chen;Jianfen Guo;Yusheng Yang
气候变化改变了亚热带地区的降水格局，延长了干旱季节，影响了森林生产力和土壤碳循环。然而，不同的土壤有机碳（SOC）组分的降水减少的响应和潜在的机制仍然知之甚少，在亚热带森林。在这项研究中，我们研究了长期（9年）穿透减少对SOC组分，包括颗粒有机C（POC）和矿物相关的有机C（MAOC），溶解有机C（DOC），微生物生物量C（MBC），菌根真菌生物量和细根生物量在两个层次（0-10 cm和40-60 cm）在亚热带米槠林。结果表明，穿透雨减少对表层土壤碳循环有显著影响，但对下层土壤碳循环影响不大。降雨量的减少显著降低了表层土壤的POC，但增加了表层土壤的MAOC。同时，土壤微生物量碳、溶解有机碳、细根生物量和菌根真菌生物量随着穿透雨的减少而减少。回归和偏最小二乘路径模型分析表明，土壤POC与细根生物量，necomass，和菌根真菌生物量呈正相关，而负相关关系观察到表土MAOC。研究结果表明，细根在穿透雨减少的表层土壤POC和MAOC的对比反应中起着重要的作用。这些信息对于了解干旱条件下亚热带森林中植物根系和菌根真菌在土壤碳循环中的作用至关重要。
Climate change has altered the precipitation patterns and prolonged the drought season in subtropical areas, which affects forest productivity and soil carbon (C) cycling. However, the response of different soil organic C (SOC) fractions to the reduction in precipitation and the potential mechanisms remain poorly understood in subtropical forests. In this study, we examined the effects of long-term (9 years) throughfall reduction on SOC fractions, including particulate organic C (POC) and mineral-associated organic C (MAOC), dissolved organic C (DOC), microbial biomass C (MBC), mycorrhizal fungal biomass, and fine-root biomass of two soil layers (0–10 cm and 40–60 cm) in a subtropicalCastanopsis carlesiiforest. The results showed that throughfall reduction had a significant effect on soil C cycling in the topsoil but not in the subsoil. Throughfall reduction significantly decreased soil POC but increased soil MAOC in the topsoil. Meanwhile, soil MBC, DOC, fine-root biomass, and mycorrhizal fungal biomass were reduced with throughfall reduction. Regression and partial least squares path modeling analyses revealed that soil POC was positively correlated with fine-root biomass, necromass, and mycorrhizal fungal biomass, whereas negative relationships were observed for topsoil MAOC. The results from this study implied that fine roots play an important role in the contrasting responses of POC and MAOC to throughfall reduction in the topsoil. Such information is essential for understanding the roles of plant roots and mycorrhizal fungi in the soil C cycle in subtropical forests under drought conditions.
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影响因子：
9.7
作者：
M. Swallow;S. Quideau;M. D. MacKenzie;B. Kishchuk
通讯作者：
M. Swallow;S. Quideau;M. D. MacKenzie;B. Kishchuk
DOI：
10.1111/nph.13045
发表时间：
2015-03
期刊：
The New phytologist
影响因子：
--
作者：
M. Rillig;C. Aguilar‐Trigueros;Joana Bergmann;E. Verbruggen;S. Veresoglou;A. Lehmann
通讯作者：
M. Rillig;C. Aguilar‐Trigueros;Joana Bergmann;E. Verbruggen;S. Veresoglou;A. Lehmann
影响因子：
18.3
作者：
N. Sokol;M. Bradford
通讯作者：
N. Sokol;M. Bradford
影响因子：
11.6
作者：
Erxiong Zhu;Z. Cao;J. Jia;Chengzhu Liu;Zhenhua Zhang;Hao Wang;Guohua Dai;Jinsheng He;Xiaojuan Feng
通讯作者：
Erxiong Zhu;Z. Cao;J. Jia;Chengzhu Liu;Zhenhua Zhang;Hao Wang;Guohua Dai;Jinsheng He;Xiaojuan Feng
影响因子：
9.7
作者：
Weishuang Zheng;E. Morris;M. Rillig
通讯作者：
Weishuang Zheng;E. Morris;M. Rillig