Contrasting effects of ectomycorrhizal and arbuscular mycorrhizal tropical tree species on soil nitrogen cycling: the potential mechanisms and corresponding adaptive strategies

doi:10.1111/oik.04751

CORC > 金属研究所 > 中国科学院金属研究所

	Contrasting effects of ectomycorrhizal and arbuscular mycorrhizal tropical tree species on soil nitrogen cycling: the potential mechanisms and corresponding adaptive strategies
	Lin, Guigang 1,2; Guo, Dali 3,4; Li, Liang 3,4; Ma, Chengen 3,4; Zeng, De-Hui 1,2
刊名	OIKOS
	2018-04-01
卷号	127 期号:4 页码:518-530
ISSN号	0030-1299
DOI	10.1111/oik.04751
通讯作者	Lin, Guigang(linguigang@126.com)
英文摘要	While it is increasingly recognized that ectomycorrhizal (ECM) and arbuscular mycorrhizal (AM) tree species vary in their effects on soil nitrogen (N) cycling, little is known about the mechanisms causing and how ECM and AM trees adapt to this variation. Using monoculture plots of six ECM and eight AM tropical trees planted in a common garden, we examined whether the contrasting effects of ECM and AM trees on soil N cycling could be explained by their differences in plant traits. Furthermore, rhizosphere effects on soil N transformations and soil exploration by fine roots were also measured to assess whether ECM and AM trees differed in N acquisition capacities. Results showed that soil NH4+-N concentration, net N mineralization and net nitrification rates were markedly lower, but soil C:N ratio was significantly higher beneath ECM trees than beneath AM trees. This more closed N cycling caused by ECM trees was attributed to their resource-conservative traits, especially the poorer leaf litter decomposability compared with AM trees. To adapt to their induced lower soil N availability, ECM trees were found to have greater rhizosphere effects on NO3--N concentration, net N mineralization and net nitrification rates to mine N, and higher soil exploration in terms of root length density to scavenge N from soils, indicating that these two strategies work in synergy to meet N demand of ECM trees. These findings suggest that ECM and AM trees have contrasting effects on soil N cycling owing to their differences in leaf litter decomposability and correspondingly possess different N acquisition capacities.
资助项目	Key Research Program of Frontier Sciences, CAS[QYZDB-SSW-DQC002] ; National Key Technologies R&D Program of China[2015BAD07B0505]
WOS研究方向	Environmental Sciences & Ecology
语种	英语
出版者	WILEY
WOS记录号	WOS:000429006200004
资助机构	Key Research Program of Frontier Sciences, CAS ; National Key Technologies R&D Program of China
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/127597]
专题	金属研究所_中国科学院金属研究所
通讯作者	Lin, Guigang
作者单位	1.Chinese Acad Sci, Inst Appl Ecol, CAS Key Lab Forest Ecol & Management, CN-110016 Shenyang, Liaoning, Peoples R China 2.Chinese Acad Sci, Inst Appl Ecol, Daqinggou Ecol Stn, Shenyang, Liaoning, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Ctr Forest Ecosyst Studies, Beijing, Peoples R China 4.Chinese Acad Sci, Qianyanzhou Ecol Stn, Key Lab Ecosyst Network Observat & Modeling, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Lin, Guigang,Guo, Dali,Li, Liang,et al. Contrasting effects of ectomycorrhizal and arbuscular mycorrhizal tropical tree species on soil nitrogen cycling: the potential mechanisms and corresponding adaptive strategies[J]. OIKOS,2018,127(4):518-530.
APA	Lin, Guigang,Guo, Dali,Li, Liang,Ma, Chengen,&Zeng, De-Hui.(2018).Contrasting effects of ectomycorrhizal and arbuscular mycorrhizal tropical tree species on soil nitrogen cycling: the potential mechanisms and corresponding adaptive strategies.OIKOS,127(4),518-530.
MLA	Lin, Guigang,et al."Contrasting effects of ectomycorrhizal and arbuscular mycorrhizal tropical tree species on soil nitrogen cycling: the potential mechanisms and corresponding adaptive strategies".OIKOS 127.4(2018):518-530.