Please use this identifier to cite or link to this item: http://repositorio.unicamp.br/jspui/handle/REPOSIP/329473
Type: Artigo
Title: Climate Change Effects On Antarctic Benthos: A Spatially Explicit Model Approach
Climate change effects on antarctic benthos : a spatially explicit model approach
Author: Torre, Luciana
Tabares, Paulo C. Carmona
Momo, Fernando
Meyer, João F. C. A.
Sahade, Ricardo
Abstract: The Antarctic Peninsula is one of the regions on the Earth with the clearest evidence of recent and fast air warming. This air temperature rise has caused massive glacier retreat leading to an increased influx of glacier meltwater which entails hydrological changes in coastal waters, increasing sediment input and ice-scouring impact regime. It has been hypothesized that an increase of sediment load due to glacier retreat resulted in a remarkable benthic community shift in Potter Cove, a small inlet of the South Shetland Islands. In order to test this hypothesis, we developed an explicit spatial model to explore the link between sedimentation and ice-scouring increase upon four of the most conspicuous benthic species. This is a valuable novel approach since disturbances are strongly dependent of the space. The model takes into account sediment and population dynamics with Lotka-Volterra competition, a sediment-dependent mortality term and a randomized ice-scouring biomass removal. With the developed algorithm, and using a MATLAB environment, numerical simulations for scenarios with different sedimentation and ice-impact rates were undertaken in order to evaluate the effect of this phenomenon on biological dynamics. Comparing simulation results with biological data, the model not only recreates the spatial community distribution pattern but also seems to be able to recreate the shifts in abundance under sedimentation enhancement, pointing out its importance as a structuring factor of polar benthic communities. Considering the challenges of Antarctic field work, this model represents a powerful tool for assessing, understanding, and predicting the effects of climate change on threatened Antarctic coastal ecosystems.
The Antarctic Peninsula is one of the regions on the Earth with the clearest evidence of recent and fast air warming. This air temperature rise has caused massive glacier retreat leading to an increased influx of glacier meltwater which entails hydrologic
Subject: King-george Island;south Shetland Islands;mcmurdo Sound;physical Disturbance;faunal Associations;weddell Sea;potter Cove;sedimentation;peninsula;coastal
Análise espacial
Ecossistema
Mudanças climáticas
Sedimentação e depositos - Modelos matemáticos
Bioinformática
MATLAB (Programa de computador)
Country: Países Baixos
Editor: Springer
Citation: Climatic Change . Springer , v. 141, p. 733 - 746, 2017.
Rights: fechado
Fechado
Identifier DOI: 10.1007/s10584-017-1915-2
Address: https://link.springer.com/article/10.1007/s10584-017-1915-2
Date Issue: 2017
Appears in Collections:IMECC - Artigos e Outros Documentos

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