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dc.contributor.authorSeddon, Alistaireng
dc.contributor.authorFroyd, Cynthia A.eng
dc.contributor.authorLeng, Melanie J.eng
dc.contributor.authorMilne, Glenn A.eng
dc.contributor.authorWillis, Katherine Janeeng
dc.date.accessioned2012-02-27T11:00:49Z
dc.date.available2012-02-27T11:00:49Z
dc.date.issued2011-07-21eng
dc.identifier.citationLoS ONE 6(7): e22376en
dc.identifier.issn1932-6203eng
dc.identifier.urihttp://hdl.handle.net/1956/5643
dc.description.abstractBackground: The Intergovernmental Panel on Climate Change (IPCC) provides a conservative estimate on rates of sea-level rise of 3.8 mm yr21 at the end of the 21st century, which may have a detrimental effect on ecologically important mangrove ecosystems. Understanding factors influencing the long-term resilience of these communities is critical but poorly understood. We investigate ecological resilience in a coastal mangrove community from the Gala´pagos Islands over the last 2700 years using three research questions: What are the ‘fast and slow’ processes operating in the coastal zone? Is there evidence for a threshold response? How can the past inform us about the resilience of the modern system? Methodology/Principal Findings: Palaeoecological methods (AMS radiocarbon dating, stable carbon isotopes (d13C)) were used to reconstruct sedimentation rates and ecological change over the past 2,700 years at Diablas lagoon, Isabela, Gala´pagos. Bulk geochemical analysis was also used to determine local environmental changes, and salinity was reconstructed using a diatom transfer function. Changes in relative sea level (RSL) were estimated using a glacio-isostatic adjustment model. Non-linear behaviour was observed in the Diablas mangrove ecosystem as it responded to increased salinities following exposure to tidal inundations. A negative feedback was observed which enabled the mangrove canopy to accrete vertically, but disturbances may have opened up the canopy and contributed to an erosion of resilience over time. A combination of drier climatic conditions and a slight fall in RSL then resulted in a threshold response, from a mangrove community to a microbial mat. Conclusions/Significance: Palaeoecological records can provide important information on the nature of non-linear behaviour by identifying thresholds within ecological systems, and in outlining responses to ‘fast’ and ‘slow’ environmental change between alternative stable states. This study highlights the need to incorporate a long-term ecological perspective when designing strategies for maximizing coastal resilience.en
dc.language.isoengeng
dc.publisherPublic Library of Scienceeng
dc.rightsAttribution CC BYeng
dc.rights.urihttp://creativecommons.org/licenses/by/2.5/eng
dc.titleEcosystem Resilience and Threshold Response in the Gala´pagos Coastal Zoneeng
dc.typePeer reviewedeng
dc.typeJournal articleeng
dc.subject.nsiVDP::Mathematics and natural science: 400::Zoology and botany: 480::Ecology: 488eng
dc.rights.holderCopyright 2011 Seddon et al.
dc.type.versionpublishedVersioneng
bora.peerreviewedPeer reviewedeng
bibo.doihttp://dx.doi.org/10.1371/journal.pone.0022376eng
dc.identifier.doi10.1371/journal.pone.0022376


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