River logjams cause frequent large-scale forest die-off events in southwestern Amazonia

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  • dc.contributor.author Lombardo, Umbertoca
  • dc.date.accessioned 2018-09-20T09:59:07Z
  • dc.date.available 2018-09-20T09:59:07Z
  • dc.date.issued 2017
  • dc.description.abstract This paper investigates the dynamics of logjam-induced floods and alluvial deposition in the Bolivian Amazon and the effects these have on forest disturbance and recovery cycles. It expands on previous work by Gullison et al. (1996) who reported a case of catastrophic floods triggered by logjams in the Chimane Forest in the Bolivian Amazon. No further studies have followed up on this observation and no research has been published on the effects of large wood in tropical lowland rivers. The study is based on the analysis of a time series of Landsat imagery (1984–2016) and field evidence. Results show that logjam-induced floods are a major driver of forest disturbance along the Andean piedmont in the Bolivian Amazon. New logjams form on an almost yearly basis, always further upriver, until an avulsion takes place. Logjam-induced floods are characterized here by the sudden deposition of a thick sand layer and the death of forest in a V-shaped area. The Bolivian Amazon offers a unique opportunity for further research on how large wood affects river behavior in lowland tropical settings and how large and frequent forest disturbance events resulting from river logjams affect forest biodiversity and community successions.
  • dc.description.sponsorship The present study has been funded by the Swiss National Science Foundation (SNSF) grant no P300P2158459/1 and by the European Union’s Horizon 2020 research and innovation program (Marie Skłodowska-Curie actions; EU project 703045).
  • dc.format.mimetype application/pdf
  • dc.identifier.citation Lombardo U. River logjams cause frequent large-scale forest die-off events in southwestern Amazonia. Earth System Dymanics. 2017;8:565-75. DOI: 10.5194/esd-8-565-2017
  • dc.identifier.doi http://dx.doi.org/10.5194/esd-8-565-2017
  • dc.identifier.issn 2190-4979
  • dc.identifier.uri http://hdl.handle.net/10230/35477
  • dc.language.iso eng
  • dc.publisher European Geosciences Union (EGU)ca
  • dc.relation.ispartof Earth System Dymanics. 2017;8:565-75.
  • dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/703045
  • dc.rights © Author(s) 2017. This work is distributed under the Creative Commons Attribution 3.0 License.
  • dc.rights.accessRights info:eu-repo/semantics/openAccess
  • dc.rights.uri https://creativecommons.org/licenses/by/3.0/
  • dc.title River logjams cause frequent large-scale forest die-off events in southwestern Amazoniaca
  • dc.type info:eu-repo/semantics/article
  • dc.type.version info:eu-repo/semantics/publishedVersion

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