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Seasonal trends of ...
Seasonal trends of Amazonian rainforest phenology, net primary productivity, and carbon allocation
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- Girardin, Cécile A J (author)
- University of Oxford
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- Malhi, Yadvinder (author)
- University of Oxford
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- Doughty, Christopher E. (author)
- University of Oxford
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- Metcalfe, Daniel B. (author)
- Lund University,Lunds universitet,Institutionen för naturgeografi och ekosystemvetenskap,Naturvetenskapliga fakulteten,Dept of Physical Geography and Ecosystem Science,Faculty of Science
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- Meir, Patrick (author)
- University of Edinburgh,Australian National University
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- del Aguila-Pasquel, Jhon (author)
- Universidad Nacional de la Amazonia Peruana,Instituto de Investigaciones de la Amazonia Peruana (IIAP)
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- Araujo-Murakami, Alejandro (author)
- Gabriel René Moreno Autonomous University
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- da Costa, Antonio C. L. (author)
- Federal University of Paraná
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- Silva Espejo, Javier E. (author)
- National University of Saint Anthony the Abbot in Cuzco
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- Farfán Amézquita, Filio (author)
- National University of Saint Anthony the Abbot in Cuzco
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- Rowland, Lucy (author)
- University of Edinburgh
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(creator_code:org_t)
- 2016
- 2016
- English 16 s.
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In: Global Biogeochemical Cycles. - 0886-6236. ; 30:5, s. 700-715
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http://dx.doi.org/10...
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https://doi.org/10.1...
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Abstract
Subject headings
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- The seasonality of solar irradiance and precipitation may regulate seasonal variations in tropical forests carbon cycling. Controversy remains over their importance as drivers of seasonal dynamics of net primary productivity in tropical forests. We use ground data from nine lowland Amazonian forest plots collected over 3 years to quantify the monthly primary productivity (NPP) of leaves, reproductive material, woody material, and fine roots over an annual cycle. We distinguish between forests that do not experience substantial seasonal moisture stress (“humid sites”) and forests that experience a stronger dry season (“dry sites”). We find that forests from both precipitation regimes maximize leaf NPP over the drier season, with a peak in production in August at both humid (mean 0.39 ± 0.03 Mg C ha−1 month−1 in July, n = 4) and dry sites (mean 0.49 ± 0.03 Mg C ha−1 month−1 in September, n = 8). We identify two distinct seasonal carbon allocation patterns (the allocation of NPP to a specific organ such as wood leaves or fine roots divided by total NPP). The forests monitored in the present study show evidence of either (i) constant allocation to roots and a seasonal trade-off between leaf and woody material or (ii) constant allocation to wood and a seasonal trade-off between roots and leaves. Finally, we find strong evidence of synchronized flowering at the end of the dry season in both precipitation regimes. Flower production reaches a maximum of 0.047 ± 0.013 and 0.031 ± 0.004 Mg C ha−1 month−1 in November, in humid and dry sites, respectively. Fruitfall production was staggered throughout the year, probably reflecting the high variation in varying times to development and loss of fruit among species.
Subject headings
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
Keyword
- carbon allocation
- ecosystem function
- net primary productivity
- phenology
- seasonality
- tropical forests
Publication and Content Type
- art (subject category)
- ref (subject category)
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