Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.5194/bg-11-6855-2014 |
How drought severity constrains gross primary production(GPP) and its partitioning among carbon pools in a Quercus ilex coppice? | |
Rambal, S.1,5; Lempereur, M.1,6; Limousin, J. M.2; Martin-StPaul, N. K.1,3,7; Ourcival, J. M.1; Rodriguez-Calcerrada, J.4 | |
通讯作者 | Rambal, S. |
来源期刊 | BIOGEOSCIENCES
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ISSN | 1726-4170 |
EISSN | 1726-4189 |
出版年 | 2014 |
卷号 | 11期号:23页码:6855-6869 |
英文摘要 | The partitioning of photosynthates toward biomass compartments plays a crucial role in the carbon (C) sink function of forests. Few studies have examined how carbon is allocated toward plant compartments in drought-prone forests. We analyzed the fate of gross primary production (GPP) in relation to yearly water deficit in an old evergreen Mediterranean Quercus ilex coppice severely affected by water limitations. Carbon fluxes between the ecosystem and the atmosphere were measured with an eddy co-variance flux tower running continuously since 2001. Discrete measurements of litterfall, stem growth and f(APAR) allowed us to derive annual productions of leaves, wood, flowers and acorns, and an isometric relationship between stem and belowground biomass has been used to estimate perennial belowground growth. By combining eddy covariance fluxes with annual net primary productions (NPP), we managed to close a C budget and derive values of autotrophic, heterotrophic respirations and carbon-use efficiency (CUE; the ratio between NPP and GPP). Average values of yearly net ecosystem production (NEP), GPP and R-eco were 282, 1259 and 977 g C m(-2). The corresponding aboveground net primary production (ANPP) components were 142.5, 26.4 and 69.6 g C m(-2) for leaves, reproductive effort (flowers and fruits) and stems, respectively. NEP, GPP and R-eco were affected by annual water deficit. Partitioning to the different plant compartments was also impacted by drought, with a hierarchy of responses going from the most affected - the stem growth - to the least affected - the leaf production. The average CUE was 0.40, which is well in the range for Mediterranean-type forest ecosystems. CUE tended to decrease less drastically in response to drought than GPP and NPP did, probably due to drought acclimation of autotrophic respiration. Overall, our results provide a baseline for modeling the inter-annual variations of carbon fluxes and allocation in this widespread Mediterranean ecosystem, and they highlight the value of maintaining continuous experimental measurements over the long term. |
类型 | Article |
语种 | 英语 |
国家 | France ; USA ; Spain ; Brazil |
收录类别 | SCI-E |
WOS记录号 | WOS:000346357100023 |
WOS关键词 | EVERGREEN MEDITERRANEAN FOREST ; NET ECOSYSTEM EXCHANGE ; PINUS-RADIATA FOLIAGE ; FINE-ROOT BIOMASS ; CLIMATE-CHANGE ; CONSTANT FRACTION ; CULTIVATED PLANTS ; NITROGEN STRESS ; USE EFFICIENCY ; NEGEV DESERT |
WOS类目 | Ecology ; Geosciences, Multidisciplinary |
WOS研究方向 | Environmental Sciences & Ecology ; Geology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/181074 |
作者单位 | 1.Univ Montpellier 3, Univ Montpellier, CNRS, Ctr Ecol Fonctionnelle & Evolut CEFE,UMR5175, F-34293 Montpellier 5, France; 2.Univ New Mexico, Dept Biol, Albuquerque, NM 87131 USA; 3.CNRS, Lab Ecol Systmat & Evolut, F-91405 Orsay, France; 4.Univ Politecn Madrid, ETSI Montes, Grp Invest Genet & Fisiol Forestal, E-28040 Madrid, Spain; 5.Univ Fed Lavras, Dept Biol, BR-37200000 Lavras, MG, Brazil; 6.Agence Environm & Maitrise Energie 20, F-49004 Angers 01, France; 7.INRA, URFM, UR629, Domaine St Paul,Site Agroparc, F-84914 Avignon 9, France |
推荐引用方式 GB/T 7714 | Rambal, S.,Lempereur, M.,Limousin, J. M.,et al. How drought severity constrains gross primary production(GPP) and its partitioning among carbon pools in a Quercus ilex coppice?[J],2014,11(23):6855-6869. |
APA | Rambal, S.,Lempereur, M.,Limousin, J. M.,Martin-StPaul, N. K.,Ourcival, J. M.,&Rodriguez-Calcerrada, J..(2014).How drought severity constrains gross primary production(GPP) and its partitioning among carbon pools in a Quercus ilex coppice?.BIOGEOSCIENCES,11(23),6855-6869. |
MLA | Rambal, S.,et al."How drought severity constrains gross primary production(GPP) and its partitioning among carbon pools in a Quercus ilex coppice?".BIOGEOSCIENCES 11.23(2014):6855-6869. |
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