Artículo
Chironomidae responses to volcanic ash fall: A case study from Northern Patagonia for consideration in paleolimnological reconstructions
Williams Velázquez, Natalia Noemi
; Rizzo, Andrea Paula
; Daga, Romina Betiana
; Alfonzo, Walter Alexis
; Ribeiro Guevara, Sergio
Fecha de publicación:
07/2023
Editorial:
Royal Society of New Zealand
Revista:
New Zealand Journal of Marine and Freshwater Research
ISSN:
0028-8330
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Lacustrine environments from Northern Patagonia are exposed to volcanic events from the Southern Volcanic Zone. Chironomid larvae are an important paleo-proxy because, in addition to their environmental sensitivity, their chitinous cephalic capsules are well preserved in lacustrine sediments, allowing their recovery and identification. We analysed the effects of a recent volcanic eruption (Puyehue-Cordón Caulle Volcanic Complex 2011) on the chironomid community based on their cephalic remains accumulated following the ash deposition process. Two pulses of ash deposition were distinguished: a first stage comprising the immediate coarse ash fall and a delayed finer volcanic deposition. An abrupt decline in chironomid taxa and their densities were noted during the first coarse pulse, followed by an attempt of community recovery through the second finer pulse, characterised by main taxa turnover, observing an alternative community functional structure. Based on these results and comparing with past volcanic depositions, we observed different chironomid responses according to their particular ecological habits, and we noted possible percolation effects, mainly in coarse tephras, and probably a delayed record of very low abundance taxa. Our results suggest caution in analysing chironomid assemblages within and adjacent to tephra deposition as local volcanic eruption could affect chironomid community with possible consequences on paleoreconstructions.
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Identificadores
Colecciones
Articulos(CCT - PATAGONIA NORTE)
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Articulos de CTRO.CIENTIFICO TECNOL.CONICET - PATAGONIA NORTE
Citación
Williams Velázquez, Natalia Noemi; Rizzo, Andrea Paula; Daga, Romina Betiana; Alfonzo, Walter Alexis; Ribeiro Guevara, Sergio; Chironomidae responses to volcanic ash fall: A case study from Northern Patagonia for consideration in paleolimnological reconstructions; Royal Society of New Zealand; New Zealand Journal of Marine and Freshwater Research; 7-2023; 1-25
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