globalchange  > 气候变化事实与影响
DOI: 10.1002/2014GB005028
Scopus记录号: 2-s2.0-85027925731
论文题名:
Source and sink carbon dynamics and carbon allocation in the Amazon basin
作者: Doughty C; E; , Metcalfe D; B; , Girardin C; A; J; , Amezquita F; F; , Durand L; , Huaraca Huasco W; , Silva-Espejo J; E; , Araujo-Murakami A; , Da Costa M; C; , Da Costa A; C; L; , Rocha W; , Meir P; , Galbraith D; , Malhi Y
刊名: Global Biogeochemical Cycles
ISSN: 8866236
出版年: 2015
卷: 29, 期:5
起始页码: 645
结束页码: 655
语种: 英语
英文关键词: autotrophic respiration ; GPP ; NPP ; PCE ; tropical forests
Scopus关键词: carbon cycle ; net primary production ; seasonality ; source-sink dynamics ; tropical forest ; Amazon Basin
英文摘要: Changes to the carbon cycle in tropical forests could affect global climate, but predicting such changes has been previously limited by lack of field-based data. Here we show seasonal cycles of the complete carbon cycle for 14, 1ha intensive carbon cycling plots which we separate into three regions: humid lowland, highlands, and dry lowlands. Our data highlight three trends: (1) there is differing seasonality of total net primary productivity (NPP) with the highlands and dry lowlands peaking in the dry season and the humid lowland sites peaking in the wet season, (2) seasonal reductions in wood NPP are not driven by reductions in total NPP but by carbon during the dry season being preferentially allocated toward either roots or canopy NPP, and (3) there is a temporal decoupling between total photosynthesis and total carbon usage (plant carbon expenditure). This decoupling indicates the presence of nonstructural carbohydrates which may allow growth and carbon to be allocated when it is most ecologically beneficial rather than when it is most environmentally available. ©2015. American Geophysical Union. All Rights Reserved.
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/77979
Appears in Collections:气候变化事实与影响

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作者单位: Environmental Change Institute, School of Geography and the Environment, University of Oxford, Oxford, United Kingdom; Department of Physical Geography and Ecosystem Science, Lund University, Lund, Sweden; Universidad Nacional San Antonio Abad Del Cusco, Cusco, Peru; Museo de Historia Natural Noel Kempff Mercado, Universidad Autõnoma Gabriel René Moreno, Santa Cruz, Bolivia; Instituto de Geociências, Universidade Federal Do Pará, Belém, Brazil; Amazon Environmental Research Institute, Canarana, Brazil; School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom; Research School of Biology, Australian National University, Canberra, ACT, Australia; School of Geography, University of Leeds, Leeds, United Kingdom

Recommended Citation:
Doughty C,E,, Metcalfe D,et al. Source and sink carbon dynamics and carbon allocation in the Amazon basin[J]. Global Biogeochemical Cycles,2015-01-01,29(5)
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