Surrounding species diversity improves subtropical seedlings' carbon dynamics
文献类型：期刊论文
| 作者 | Salmon, Yann2,3,4; Li, Xuefei3; Yang, Bo5; Ma, Keping6 ; Siegwolf, Rolf T. W.; Schmid, Bernhard
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| 刊名 | ECOLOGY AND EVOLUTION
 |
| 出版日期 | 2018 |
| 卷号 | 8期号:14页码:7055-7067 |
| 关键词 | C-13 O-18 biodiversity competition photosynthesis respiration stable isotope water |
| ISSN号 | 2045-7758 |
| DOI | 10.1002/ece3.4225 |
| 文献子类 | Article |
| 英文摘要 | 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. |
| 学科主题 | Ecology ; Evolutionary Biology |
| 出版地 | HOBOKEN |
| WOS关键词 | WATER-USE EFFICIENCY ; DARK RESPIRED CO2 ; ISOTOPE COMPOSITION ; ORGANIC-MATTER ; DIEL VARIATIONS ; TIME-LAG ; SOIL ; LEAF ; DISCRIMINATION ; ALLOCATION |
| 语种 | 英语 |
| WOS记录号 | WOS:000440138400019 |
| 出版者 | WILEY |
| 资助机构 | Schweizerischer Nationalfonds zur Forderung der Wissenschaftlichen ForschungAustrian Science Fund (FWF) [IZL CZ3 123883] |
| 源URL | [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.Siegwolf, Rolf T. W.] Paul Scherrer Inst, Lab Atmospher Chem Ecosyst Fluxes & Stable Isotop, Villigen, Switzerland 2.Univ Zurich, Dept Evolutionary Biol & Environm Studies, Zurich, Switzerland 3.Univ Edinburgh, Sch Geosci, Edinburgh, Midlothian, Scotland 4.Univ Helsinki, Inst Atmospher & Earth Syst Res Phys, Fac Sci, Helsinki, Finland 5.Univ Helsinki, Inst Atmospher & Earth Syst Res Forest Sci, Fac Agr & Forestry, Helsinki, Finland 6.Jingdezhen Univ, Key Lab Special Resources Biodivers Jiangxi Prov, Jingdezhen, Jiangxi, Peoples R China 7.Chinese Acad Sci, Inst Bot, State Key Lab Environm & Vegetat Change, Beijing, Peoples R China |
| 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. |
入库方式： OAI收割
来源：植物研究所
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