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Effect of 7 yr of experimental drought on vegetation dynamics and biomass storage of an eastern Amazonian rainforest

da Costa, Antonio Carlos Lola; Galbraith, David; Almeida, Samuel; Portela, Bruno Takeshi Tanaka; da Costa, Mauricio; de Athaydes Silva Junior, João; Braga, Alan P.; de Gonçalves, Paulo H. L.; de Oliveira, Alex AR; Fisher, Rosie; Phillips, Oliver L.; Metcalfe, Daniel B.; Levy, Peter; Meir, Patrick. 2010 Effect of 7 yr of experimental drought on vegetation dynamics and biomass storage of an eastern Amazonian rainforest. New Phytologist, 187. 579-591. 10.1111/j.1469-8137.2010.03309.x

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Abstract/Summary

•At least one climate model predicts severe reductions of rainfall over Amazonia during this century. Long-term throughfall exclusion (TFE) experiments represent the best available means to investigate the resilience of the Amazon rainforest to such droughts.•Results are presented from a 7 yr TFE study at Caxiuanã National Forest, eastern Amazonia. We focus on the impacts of the drought on tree mortality, wood production and above-ground biomass.•Tree mortality in the TFE plot over the experimental period was 2.5% yr−1, compared with 1.25% yr−1 in a nearby control plot experiencing normal rainfall. Differences in stem mortality between plots were greatest in the largest (> 40 cm diameter at breast height (dbh)) size class (4.1% yr−1 in the TFE and 1.4% yr−1 in the control). Wood production in the TFE plot was c. 30% lower than in the control plot. Together, these changes resulted in a loss of 37.8 ± 2.0 Mg carbon (C) ha−1 in the TFE plot (2002–2008), compared with no change in the control.•These results are remarkably consistent with those from another TFE (at Tapajós

Item Type: Publication - Article
Digital Object Identifier (DOI): 10.1111/j.1469-8137.2010.03309.x
Programmes: CEH Topics & Objectives 2009 - 2012 > Biogeochemistry > BGC Topic 1 - Monitoring and Interpretation of Biogeochemical and Climate Changes > BGC - 1.3 - Quantify & attribute changes in biogeochemiical cycles ...
CEH Sections: Billett (to November 2013)
ISSN: 0028-646X
Additional Keywords: Amazon rainforest, biomass, drought, tree mortality, wood production
NORA Subject Terms: Ecology and Environment
Date made live: 09 Feb 2011 11:59
URI: http://nora.nerc.ac.uk/id/eprint/13327

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