Demographic threats to the sustainability of brazil nut exploitation

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Peres, Carlos A. ORCID: https://orcid.org/0000-0002-1588-8765, Baider, Claudia, Zuidema, Pieter A., Wadt, Lúcia H.O., Kainer, Karen A., Gomes-Silva, Daisy A.P., Salomao, Rafael P., Simões, Luciana L., Franciosi, Eduardo R.N., Cornejo Valverde, Fernando, Gribel, Rogério, Shepard, Glenn H., Kanashiro, Milton, Coventry, Peter, Yu, Douglas W., Watkinson, Andrew R. and Freckleton, Robert P. (2003) Demographic threats to the sustainability of brazil nut exploitation. Science, 302 (5653). pp. 2112-2114. ISSN 0036-8075

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Abstract

A comparative analysis of 23 populations of the Brazil nut tree (Bertholletia excelsa) across the Brazilian, Peruvian, and Bolivian Amazon shows that the history and intensity of Brazil nut exploitation are major determinants of population size structure. Populations subjected to persistent levels of harvest lack juvenile trees less than 60 centimeters in diameter at breast height; only populations with a history of either light or recent exploitation contain large numbers of juvenile trees. A harvesting model confirms that intensive exploitation levels over the past century are such that juvenile recruitment is insufficient to maintain populations over the long term. Without management, intensively harvested populations will succumb to a process of senescence and demographic collapse, threatening this cornerstone of the Amazonian extractive economy.

Item Type: Article
Uncontrolled Keywords: general ,/dk/atira/pure/subjectarea/asjc/1000
Faculty \ School: Faculty of Science > School of Environmental Sciences
Faculty of Science > School of Biological Sciences
University of East Anglia Research Groups/Centres > Theme - ClimateUEA
UEA Research Groups: Faculty of Science > Research Groups > Environmental Biology
Faculty of Science > Research Centres > Centre for Ecology, Evolution and Conservation
Faculty of Science > Research Groups > Organisms and the Environment
Faculty of Science > Research Groups > Collaborative Centre for Sustainable Use of the Seas
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Depositing User: Vishal Gautam
Date Deposited: 19 Dec 2003
Last Modified: 17 May 2023 00:18
URI: https://ueaeprints.uea.ac.uk/id/eprint/17863
DOI: 10.1126/science.1091698

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