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Surrounding species diversity improves subtropical seedlings' carbon dynamics
Salmon, Yann1,2,3; Li, Xuefei2; Yang, Bo4; Ma, Keping5; Siegwolf, Rolf T. W.; Schmid, Bernhard
2018
发表期刊ECOLOGY AND EVOLUTION
ISSN2045-7758
卷号8期号:14页码:7055-7067
摘要Increasing biodiversity has been linked to higher primary productivity in terrestrial ecosystems. However, the underlying ecophysiological mechanisms remain poorly understood. We investigated the effects of surrounding species richness (monoculture, two- and four-species mixtures) on the ecophysiology of Lithocarpus glaber seedlings in experimental plots in subtropical China. A natural rain event isotopically labelled both the water uptaken by the L.glaber seedlings and the carbon in new photoassimilates through changes of photosynthetic discrimination. We followed the labelled carbon (C) and oxygen (O) in the plant-soil-atmosphere continuum. We measured gas-exchange variables (C assimilation, transpiration and above- and belowground respiration) and C-13 in leaf biomass, phloem, soil microbial biomass, leaf- and soil-respired CO2 as well as O-18 in leaf and xylem water. The C-13 signal in phloem and respired CO2 in L.glaber in monoculture lagged behind those in species mixture, showing a slower transport of new photoassimilates to and through the phloem in monoculture. Furthermore, leaf-water O-18 enrichment above the xylem water in L.glaber increased after the rain in lower diversity plots suggesting a lower ability to compensate for increased transpiration. Lithocarpus glaber in monoculture showed higher C assimilation rate and water-use efficiency. However, these increased C resources did not translate in higher growth of L.glaber in monoculture suggesting the existence of larger nongrowth-related C sinks in monoculture. These ecophysiological responses of L.glaber, in agreement with current understanding of phloem transport are consistent with a stronger competition for water resources in monoculture than in species mixtures. Therefore, increasing species diversity in the close vicinity of the studied plants appears to alleviate physiological stress induced by water competition and to counterbalance the negative effects of interspecific competition on assimilation rates for L.glaber by allowing a higher fraction of the C assimilated to be allocated to growth in species mixture than in monoculture.
关键词C-13 O-18 biodiversity competition photosynthesis respiration stable isotope water
学科领域Ecology ; Evolutionary Biology
DOI10.1002/ece3.4225
收录类别SCI
语种英语
WOS关键词WATER-USE EFFICIENCY ; DARK RESPIRED CO2 ; ISOTOPE COMPOSITION ; ORGANIC-MATTER ; DIEL VARIATIONS ; TIME-LAG ; SOIL ; LEAF ; DISCRIMINATION ; ALLOCATION
WOS记录号WOS:000440138400019
出版者WILEY
文献子类Article
出版地HOBOKEN
资助机构Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen ForschungAustrian Science Fund (FWF) [IZL CZ3 123883]
作者邮箱yann.salmon@helsinki.fi
作品OA属性Green Published, gold
引用统计
被引频次:2[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ibcas.ac.cn/handle/2S10CLM1/20467
专题植被与环境变化国家重点实验室
作者单位1.Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland
2.Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland
3.Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Fac Sci, Helsinki, Finland
4.Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Fac Agr & Forestry, Helsinki, Finland
5.Jingdezhen Univ, Key Lab Special Resources Biodivers Jiangxi Prov, Jingdezhen, Jiangxi, Peoples R China
6.Chinese Acad Sci, Inst Bot, State Key Lab Environm & Vegetat Change, Beijing, Peoples R China
7.Siegwolf, Rolf T. W.] Paul Scherrer Inst, Lab Atmospher Chem Ecosyst Fluxes & Stable Isotop, Villigen, Switzerland
推荐引用方式
GB/T 7714
Salmon, Yann,Li, Xuefei,Yang, Bo,et al. Surrounding species diversity improves subtropical seedlings' carbon dynamics[J]. ECOLOGY AND EVOLUTION,2018,8(14):7055-7067.
APA Salmon, Yann,Li, Xuefei,Yang, Bo,Ma, Keping,Siegwolf, Rolf T. W.,&Schmid, Bernhard.(2018).Surrounding species diversity improves subtropical seedlings' carbon dynamics.ECOLOGY AND EVOLUTION,8(14),7055-7067.
MLA Salmon, Yann,et al."Surrounding species diversity improves subtropical seedlings' carbon dynamics".ECOLOGY AND EVOLUTION 8.14(2018):7055-7067.
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