Cargando…

The effects of changing climate on faunal depth distributions determine winners and losers

Changing climate is predicted to impact all depths of the global oceans, yet projections of range shifts in marine faunal distributions in response to changing climate seldom evaluate potential shifts in depth distribution. Marine ectotherms' thermal tolerance is limited by their ability to mai...

Descripción completa

Detalles Bibliográficos
Autores principales: Brown, Alastair, Thatje, Sven
Formato: Online Artículo Texto
Lenguaje:English
Publicado: John Wiley & Sons Ltd 2015
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4310292/
https://www.ncbi.nlm.nih.gov/pubmed/25044552
http://dx.doi.org/10.1111/gcb.12680
_version_ 1782354844542042112
author Brown, Alastair
Thatje, Sven
author_facet Brown, Alastair
Thatje, Sven
author_sort Brown, Alastair
collection PubMed
description Changing climate is predicted to impact all depths of the global oceans, yet projections of range shifts in marine faunal distributions in response to changing climate seldom evaluate potential shifts in depth distribution. Marine ectotherms' thermal tolerance is limited by their ability to maintain aerobic metabolism (oxygen- and capacity-limited tolerance), and is functionally associated with their hypoxia tolerance. Shallow-water (<200 m depth) marine invertebrates and fishes demonstrate limited tolerance of increasing hydrostatic pressure (pressure exerted by the overlying mass of water), and hyperbaric (increased pressure) tolerance is proposed to depend on the ability to maintain aerobic metabolism, too. Here, we report significant correlation between the hypoxia thresholds and the hyperbaric thresholds of taxonomic groups of shallow-water fauna, suggesting that pressure tolerance is indeed oxygen limited. Consequently, it appears that the combined effects of temperature, pressure and oxygen concentration constrain the fundamental ecological niches (FENs) of marine invertebrates and fishes. Including depth in a conceptual model of oxygen- and capacity-limited FENs' responses to ocean warming and deoxygenation confirms previous predictions made based solely on consideration of the latitudinal effects of ocean warming (e.g. Cheung et al., 2009), that polar taxa are most vulnerable to the effects of climate change, with Arctic fauna experiencing the greatest FEN contraction. In contrast, the inclusion of depth in the conceptual model reveals for the first time that temperate fauna as well as tropical fauna may experience substantial FEN expansion with ocean warming and deoxygenation, rather than FEN maintenance or contraction suggested by solely considering latitudinal range shifts.
format Online
Article
Text
id pubmed-4310292
institution National Center for Biotechnology Information
language English
publishDate 2015
publisher John Wiley & Sons Ltd
record_format MEDLINE/PubMed
spelling pubmed-43102922015-02-09 The effects of changing climate on faunal depth distributions determine winners and losers Brown, Alastair Thatje, Sven Glob Chang Biol Primary Research Articles Changing climate is predicted to impact all depths of the global oceans, yet projections of range shifts in marine faunal distributions in response to changing climate seldom evaluate potential shifts in depth distribution. Marine ectotherms' thermal tolerance is limited by their ability to maintain aerobic metabolism (oxygen- and capacity-limited tolerance), and is functionally associated with their hypoxia tolerance. Shallow-water (<200 m depth) marine invertebrates and fishes demonstrate limited tolerance of increasing hydrostatic pressure (pressure exerted by the overlying mass of water), and hyperbaric (increased pressure) tolerance is proposed to depend on the ability to maintain aerobic metabolism, too. Here, we report significant correlation between the hypoxia thresholds and the hyperbaric thresholds of taxonomic groups of shallow-water fauna, suggesting that pressure tolerance is indeed oxygen limited. Consequently, it appears that the combined effects of temperature, pressure and oxygen concentration constrain the fundamental ecological niches (FENs) of marine invertebrates and fishes. Including depth in a conceptual model of oxygen- and capacity-limited FENs' responses to ocean warming and deoxygenation confirms previous predictions made based solely on consideration of the latitudinal effects of ocean warming (e.g. Cheung et al., 2009), that polar taxa are most vulnerable to the effects of climate change, with Arctic fauna experiencing the greatest FEN contraction. In contrast, the inclusion of depth in the conceptual model reveals for the first time that temperate fauna as well as tropical fauna may experience substantial FEN expansion with ocean warming and deoxygenation, rather than FEN maintenance or contraction suggested by solely considering latitudinal range shifts. John Wiley & Sons Ltd 2015-01 2014-08-01 /pmc/articles/PMC4310292/ /pubmed/25044552 http://dx.doi.org/10.1111/gcb.12680 Text en © 2014 The Authors. Global Change Biology Published by John Wiley & Sons Ltd. http://creativecommons.org/licenses/by/3.0/ This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited.
spellingShingle Primary Research Articles
Brown, Alastair
Thatje, Sven
The effects of changing climate on faunal depth distributions determine winners and losers
title The effects of changing climate on faunal depth distributions determine winners and losers
title_full The effects of changing climate on faunal depth distributions determine winners and losers
title_fullStr The effects of changing climate on faunal depth distributions determine winners and losers
title_full_unstemmed The effects of changing climate on faunal depth distributions determine winners and losers
title_short The effects of changing climate on faunal depth distributions determine winners and losers
title_sort effects of changing climate on faunal depth distributions determine winners and losers
topic Primary Research Articles
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4310292/
https://www.ncbi.nlm.nih.gov/pubmed/25044552
http://dx.doi.org/10.1111/gcb.12680
work_keys_str_mv AT brownalastair theeffectsofchangingclimateonfaunaldepthdistributionsdeterminewinnersandlosers
AT thatjesven theeffectsofchangingclimateonfaunaldepthdistributionsdeterminewinnersandlosers
AT brownalastair effectsofchangingclimateonfaunaldepthdistributionsdeterminewinnersandlosers
AT thatjesven effectsofchangingclimateonfaunaldepthdistributionsdeterminewinnersandlosers