Please use this identifier to cite or link to this item: https://repositorio.inpa.gov.br/handle/1/38361
Title: Primary modes of tree mortality in southwestern Amazon forests
Authors: Lima, Égon Fabricio De Castro
Ribeiro, Sabina Cerruto
Mews, Henrique Augusto
Costa, Richarlly Silva
Garvizu, N. Galia Selaya
Brown, Irving Foster
Perz, Stephen George L.
Schmidt, Fernando Augusto
Silveira, Marcos
Phillips, Oliver L.
Castro, Wendeson
Baker, Timothy R.
Lloyd, Jonathan L.
Camargo, Plínio Barbosa
Vieira, Simone Aparecida
Quesada, Carlos Alberto Nobre
Stropp, Juliana
Feldpausch, Ted R.
Keywords: Tropical Forests
Gross Primary Productivity
Amazon
Issue Date: 2022
metadata.dc.publisher.journal: Trees, Forests and People
metadata.dc.relation.ispartof: Volume 7
Abstract: Tree mortality rates and the modes of tree death have recently been extensively investigated in the Amazon. However, efforts to describe these processes have not been well distributed across the basin. No study has yet investigated in depth tree mortality process in the unique low, open, bamboo-dominated forests of southwestern Amazonia, a region with a distinct climate and the epicenter of recent severe drought events. Here, we investigated the leading ways that trees die in the terra-firme forests of the southwestern Brazilian Amazon, to understand whether the dynamics of mortality differ from those recorded in other parts of the basin. Using data from six permanent plots located in southwestern Amazonia, we calculated the mortality rate for three main modes of tree death: standing, broken and uprooted. We thus identified the predominant mode of death over a 14 year period (2002–2016). We found that trees in the southwestern Amazon died mainly standing (325 trees, 0.8% year−1) and broken (362 trees, 0.8% year−1); significantly fewer trees died uprooted (156 trees, 0.4% year−1, equivalent to less than one in five of all trees dying). During the study period, the tree mode of death with the greatest proportion in the region alternated between standing and broken trees. Forest characteristics of the southwestern Amazon, like presence and high density of bamboo culms, and the fact that the region was subject to severe droughts in 2005 and 2010, may be affecting how trees die in southwestern Amazon. The presence of these factors makes the forest dynamics of the southwestern Amazon different from other regions of the Amazon basin.
ISSN: 26667193
metadata.dc.identifier.doi: 10.1016/j.tfp.2021.100180
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