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The productivity, metabolism and carbon cycle of two lowland tropical forest plots in south-western Amazonia, Peru

Malhi, Yadvinder; Farfan Amezquita, Filio; Doughty, Christopher E.; Silva-Espejo, Javier E.; Girardin, Cecile A. J.; Metcalfe, Dan LU ; Aragao, Luiz E. O. C.; Huaraca-Quispe, Lidia P.; Alzamora-Taype, Ivonne and Eguiluz-Mora, Luzmilla, et al. (2014) In Plant Ecology & Diversity 7(1-2). p.85-105
Abstract
Background: The forests of western Amazonia are known to be more dynamic that the better-studied forests of eastern Amazonia, but there has been no comprehensive description of the carbon cycle of a western Amazonian forest. Aims: We present the carbon budget of two forest plots in Tambopata in south-eastern Peru, western Amazonia. In particular, we present, for the first time, the seasonal variation in the detailed carbon budget of a tropical forest. Methods: We measured the major components of net primary production (NPP) and total autotrophic respiration over 3-6 years. Results: The NPP for the two plots was 15.1 +/- 0.8 and 14.2 +/- 1.0 Mg C ha(-1) year(-1), the gross primary productivity (GPP) was 35.5 +/- 3.6 and 34.5 +/- 3.5 Mg C... (More)
Background: The forests of western Amazonia are known to be more dynamic that the better-studied forests of eastern Amazonia, but there has been no comprehensive description of the carbon cycle of a western Amazonian forest. Aims: We present the carbon budget of two forest plots in Tambopata in south-eastern Peru, western Amazonia. In particular, we present, for the first time, the seasonal variation in the detailed carbon budget of a tropical forest. Methods: We measured the major components of net primary production (NPP) and total autotrophic respiration over 3-6 years. Results: The NPP for the two plots was 15.1 +/- 0.8 and 14.2 +/- 1.0 Mg C ha(-1) year(-1), the gross primary productivity (GPP) was 35.5 +/- 3.6 and 34.5 +/- 3.5 Mg C ha(-1) year(-1), and the carbon use efficiency (CUE) was 0.42 +/- 0.05 and 0.41 +/- 0.05. NPP and CUE showed a large degree of seasonality. Conclusions: The two plots were similar in carbon cycling characteristics despite the different soils, the most notable difference being high allocation of NPP to canopy and low allocation to fine roots in the Holocene floodplain plot. The timing of the minima in the wet-dry transition suggests they are driven by phenological rhythms rather than being driven directly by water stress. When compared with results from forests on infertile forests in humid lowland eastern Amazonia, the plots have slightly higher GPP, but similar patterns of CUE and carbon allocation. (Less)
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@article{66cf6b33-31a7-4d48-bd29-120f5c0562b7,
  abstract     = {Background: The forests of western Amazonia are known to be more dynamic that the better-studied forests of eastern Amazonia, but there has been no comprehensive description of the carbon cycle of a western Amazonian forest. Aims: We present the carbon budget of two forest plots in Tambopata in south-eastern Peru, western Amazonia. In particular, we present, for the first time, the seasonal variation in the detailed carbon budget of a tropical forest. Methods: We measured the major components of net primary production (NPP) and total autotrophic respiration over 3-6 years. Results: The NPP for the two plots was 15.1 +/- 0.8 and 14.2 +/- 1.0 Mg C ha(-1) year(-1), the gross primary productivity (GPP) was 35.5 +/- 3.6 and 34.5 +/- 3.5 Mg C ha(-1) year(-1), and the carbon use efficiency (CUE) was 0.42 +/- 0.05 and 0.41 +/- 0.05. NPP and CUE showed a large degree of seasonality. Conclusions: The two plots were similar in carbon cycling characteristics despite the different soils, the most notable difference being high allocation of NPP to canopy and low allocation to fine roots in the Holocene floodplain plot. The timing of the minima in the wet-dry transition suggests they are driven by phenological rhythms rather than being driven directly by water stress. When compared with results from forests on infertile forests in humid lowland eastern Amazonia, the plots have slightly higher GPP, but similar patterns of CUE and carbon allocation.},
  author       = {Malhi, Yadvinder and Farfan Amezquita, Filio and Doughty, Christopher E. and Silva-Espejo, Javier E. and Girardin, Cecile A. J. and Metcalfe, Dan and Aragao, Luiz E. O. C. and Huaraca-Quispe, Lidia P. and Alzamora-Taype, Ivonne and Eguiluz-Mora, Luzmilla and Marthews, Toby R. and Halladay, Kate and Quesada, Carlos A. and Robertson, Amanda L. and Fisher, Joshua B. and Zaragoza-Castells, Joana and Rojas-Villagra, Clara M. and Pelaez-Tapia, Yulina and Salinas, Norma and Meir, Patrick and Phillips, Oliver L.},
  issn         = {1755-0874},
  keyword      = {allocation,GPP,herbivory,NPP,phenology,seasonality,soil,respiration,stem respiration,tropical forests,western Amazonia},
  language     = {eng},
  number       = {1-2},
  pages        = {85--105},
  publisher    = {Taylor & Francis},
  series       = {Plant Ecology & Diversity},
  title        = {The productivity, metabolism and carbon cycle of two lowland tropical forest plots in south-western Amazonia, Peru},
  url          = {http://dx.doi.org/10.1080/17550874.2013.820805},
  volume       = {7},
  year         = {2014},
}