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dc.contributor.authorRaposeiro, Pedro
dc.contributor.authorRubio, Maria Jesus
dc.contributor.authorGonzález, Alba
dc.contributor.authorHernández, Armand
dc.contributor.authorSánchez-López, Guiomar
dc.contributor.authorVázquez-Loureiro, David
dc.contributor.authorRull, Valentí
dc.contributor.authorBao, Roberto
dc.contributor.authorCosta, Ana Cristina
dc.contributor.authorGonçalves, Vítor
dc.contributor.authorSáez, Alberto
dc.contributor.authorGiralt, Santiago
dc.date.accessioned2017-03-15T14:27:22Z
dc.date.issued2017
dc.identifier.citationRaposeiro, P.M., Rubio, M.J., González, A., Hernández, A., Sánchez-López, G., Vázquez-Loureiro, D., Rull, V., Bao, R., Costa, A.C., Gonçalves, V., Sáez, A., Giralt, S., 2017. Impact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands). Palaeogeography, Palaeoclimatology, Palaeoecology 466, 77-88. http://dx.doi.org/10.1016/j.palaeo.2016.11.015es_ES
dc.identifier.issn0031-0182
dc.identifier.urihttp://hdl.handle.net/2183/18268
dc.description.abstractLittle is known about the effect of top predator introduction in historically fishless communities, especially on remote islands. This issue is important because it might strongly affect climate reconstructions derived from biota assemblages such as chironomids. Head capsule larval remains of chironomids have been studied in a 660 years lacustrine sedimentary sequence from Lake Azul (Sao Miguel Island, Azores archipelago) to assess the extent and timescale of the effect of the predator introduction occurring in this historically fishless lake. Analysis of similarity showed that the chironomid assemblage was statistically different before and after predator introduction (R = 0.78; p < 0.001). Abundance of chironomids was about 40% greater in the fishless lake period compared to the period in the presence of predator. Results show major change in chironomid assemblage coinciding with the first time of goldfish introduction (around 1790 CE), followed by carp (1890 CE) and pike (1979 CE) introductions. The composition of feeding group guilds changed following a pattern characterized by a decrease in abundance of detritivorous and predaceous taxa and an increase in abundance of grazing chironomid taxa. This study suggests that predator introduction was the most important factor affecting the chironomid assemblages in this natural, Azorean fishless lake, but predators did not affect all chironomid species. Other external forcings like major climate oscillations, anthropogenic activities in the catchment basin, and volcanic eruptions seem to play an additional role. The latest stage of the warm and arid Medieval Climate Anomaly (1000–1300 CE) favoured the occurrence of some warm-adapted chironomid taxa, which were absent through the Little Ice Age (ca. 1450–1850 CE) cool period.es_ES
dc.description.sponsorshipAzores. Fundo Regional da Ciência e Tecnologia; M3.1.7/F/009/2011es_ES
dc.description.sponsorshipMinisterio de Ciencia e Innovación; CGL2010-15767es_ES
dc.description.sponsorshipMinisterio de Ciencia e Innovación; CGL2013-40608-Res_ES
dc.description.sponsorshipPortugal. Fundação para a Ciência e Tecnologia; SFRH/BPD/99461/2014es_ES
dc.description.sponsorshipPortugal. Fundação para a Ciência e Tecnologia; SFRH/BPD/79923/2011es_ES
dc.description.sponsorshipPortugal. Fundação para a Ciência e Tecnologia; UID/BIA/50027/2013es_ES
dc.description.sponsorshipPortugal. Fundação para a Ciência e Tecnologia; POCI-01-0145-FEDER-006821es_ES
dc.language.isoenges_ES
dc.publisherElsevieres_ES
dc.relation.urihttp://dx.doi.org/10.1016/j.palaeo.2016.11.015es_ES
dc.subjectFishless lakeses_ES
dc.subjectPredator introductionses_ES
dc.subjectChironomidses_ES
dc.subjectClimate changees_ES
dc.subjectOceanic islandses_ES
dc.titleImpact of the historical introduction of exotic fishes on the chironomid community of Lake Azul (Azores Islands)es_ES
dc.typeinfo:eu-repo/semantics/articlees_ES
dc.rights.accessinfo:eu-repo/semantics/embargoedAccesses_ES
dc.date.embargoEndDate2018-11-13es_ES
dc.date.embargoLift2018-11-13
UDC.journalTitlePalaeogeography, Palaeoclimatology, Palaeoecologyes_ES
UDC.volume466es_ES
UDC.startPage77es_ES
UDC.endPage88es_ES


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