Universidad Peruana Cayetano Heredia

Changes in rocky intertidal communities after the 2015 and 2017 El Niño events along the Peruvian coast

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dc.contributor.author Valqui, J.
dc.contributor.author Ibañez Erquiaga, B.
dc.contributor.author Pacheco, A.S.
dc.contributor.author Wilbur, L.
dc.contributor.author Ochoa, Diana
dc.contributor.author Cardich Salazar, Jorge Aquiles
dc.contributor.author Pérez Huaranga, M.
dc.contributor.author Salas Gismondi, R.
dc.contributor.author Perez Segovia, Alexander
dc.contributor.author Indacochea, A.
dc.contributor.author Avila Peltroche, J.
dc.contributor.author Rivera Chira, Maria Concepcion
dc.contributor.author Carré, Matthieu
dc.date.accessioned 2021-04-13T20:51:03Z
dc.date.available 2021-04-13T20:51:03Z
dc.date.issued 2020
dc.identifier.uri https://hdl.handle.net/20.500.12866/9218
dc.description.abstract The Peruvian coast experiences the largest interannual variability of sea surface temperature in the world due to the combined influence of the coastal upwelling and El Niño Southern Oscillation (ENSO). Although biological impacts of El Niño events have been widely reported, their effects on rocky intertidal communities remains largely unknown in Peru. Herein, we analyze the results of two biological surveys of rocky intertidal communities, conducted along 1400 km of the Peruvian coast. The first survey was conducted in 2015 yielding a snapshot of the distribution of rocky intertidal communities after 17 years of stable La Niña-like conditions. The second survey was carried in October 2017, after the 2015-16 and the 2017 El Niño events, which produced warm sea surface temperature (SST) anomalies up to 6 °C on the Peruvian coast. We find no changes throughout the latitudinal transect in taxonomic richness but an important turnover of species, especially marked in the transition zone (~4–8°S) between the Panamic and the Humboldt provinces. Temperature-related southward migration of species was evidenced in a few sites but did not explain the large-scale change in communities observed from 2015 to 2017, primarily driven by large changes in the distribution of a few ecologically important species across the Panamic and Humboldt provinces. A primary environmental impact on some ecologically key species likely triggered a chain of secondary impacts through ecological relationships which lead to a complex change independent from SST gradients. Further studies are needed to better characterize and disentangle the seasonal and interannual variability of the rocky intertidal communities and their drivers. When this interannual variability is integrated, the nine study sites show a highly persistent community structure determined by the latitudinal SST gradient along the Peruvian coast. en_US
dc.language.iso eng
dc.publisher Elsevier
dc.relation.ispartofseries Estuarine, Coastal and Shelf Science
dc.rights info:eu-repo/semantics/restrictedAccess
dc.rights.uri https://creativecommons.org/licenses/by-nc-nd/4.0/deed.es
dc.subject Peru en_US
dc.subject El Nino en_US
dc.subject annual variation en_US
dc.subject Biogeography en_US
dc.subject community dynamics en_US
dc.subject community structure en_US
dc.subject Community structure en_US
dc.subject ecological impact en_US
dc.subject El Nino-Southern Oscillation en_US
dc.subject Humboldt current ecosystem en_US
dc.subject La Nina en_US
dc.subject Latitudinal pattern en_US
dc.subject Macrobenthos en_US
dc.subject rocky shore en_US
dc.subject sea surface temperature en_US
dc.subject species richness en_US
dc.subject taxonomy en_US
dc.subject Thermal anomaly en_US
dc.subject upwelling en_US
dc.title Changes in rocky intertidal communities after the 2015 and 2017 El Niño events along the Peruvian coast en_US
dc.type info:eu-repo/semantics/article
dc.identifier.doi https://doi.org/10.1016/j.ecss.2020.107142
dc.subject.ocde https://purl.org/pe-repo/ocde/ford#1.05.11
dc.relation.issn 1096-0015


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