Title
Recovery of forest structure following large-scale windthrows in the northwestern amazon
Date Issued
01 June 2021
Access level
metadata only access
Resource Type
journal article
Publisher(s)
MDPI AG
Abstract
The dynamics of forest recovery after windthrows (i.e., broken or uprooted trees by wind) are poorly understood in tropical forests. The Northwestern Amazon (NWA) is characterized by a higher occurrence of windthrows, greater rainfall, and higher annual tree mortality rates (~2%) than the Central Amazon (CA). We combined forest inventory data from three sites in the Iquitos region of Peru, with recovery periods spanning 2, 12, and 22 years following windthrow events. Study sites and sampling areas were selected by assessing the windthrow severity using remote sensing. At each site, we recorded all trees with a diameter at breast height (DBH) ≥ 10 cm along transects, capturing the range of windthrow severity from old-growth to highly disturbed (mortality > 60%) forest. Across all damage classes, tree density and basal area recovered to >90% of the old-growth values after 20 years. Aboveground biomass (AGB) in old-growth forest was 380 (±156) Mg ha−1 . In extremely disturbed areas, AGB was still reduced to 163 (±68) Mg ha−1 after 2 years and 323 (± 139) Mg ha−1 after 12 years. This recovery rate is ~50% faster than that reported for Central Amazon forests. The faster recovery of forest structure in our study region may be a function of its higher productivity and adaptability to more frequent and severe windthrows. These varying rates of recovery highlight the importance of extreme wind and rainfall on shaping gradients of forest structure in the Amazon, and the different vulnerabilities of these forests to natural disturbances whose severity and frequency are being altered by climate change.
Volume
12
Issue
6
Language
English
OCDE Knowledge area
Agricultura, Silvicultura, Pesquería Conservación de la Biodiversidad
Scopus EID
2-s2.0-85107763371
Source
Forests
ISSN of the container
19994907
Sponsor(s)
This research was supported by the Max Planck Institute of Biogeochemistry and the DAAD (German Academic Exchange Service). The field campaign was supported as part of the Next Generation Ecosystem Experiments-Tropics funded by the U.S. Department of Energy, Office of Science, and Office of Biological and Environmental Research. Data collection was supported by NASA Biodiversity (Grant number: NNX09AK21G). The Brazilian data applied in this study is part of the ATTO Project, funded by the German Federal Ministry of Education and Research (BMBF contracts 01LB1001A and 01LK1602A) and the Brazilian Ministério da Cieência, Tecnologia e Inovação (MCTI/FINEP contract 01.11.01248.00) as well as the Max Planck Society (MPG). Brazilian sites are also supported by the Instituto Nacional de Ciência e Tecnologia INCT-Madeiras da Amazônia. D.M.M. is also supported by the ATTO Project. R.N.J. is also supported by Reducing Uncertainties in Biogeochemical Interactions through Synthesis and Computation Scientific Focus Area (RUBISCO SFA) under contract to LBNL, which is sponsored by the Regional and Global Climate Modeling (RGCM) Program in the Climate and Environmental Sciences Division (CESD) of the Office of Biological and Environmental Research (BER) in the US Department of Energy Office of Science.
Sources of information: Directorio de Producción Científica Scopus