Open Access Repository

Effects of ocean acidification on Antarctic marine organisms: a meta-analysis

Downloads

Downloads per month over past year

Hancock, AM ORCID: 0000-0001-6049-5592, King, CK, Stark, JS, McMinn, A ORCID: 0000-0002-2133-3854 and Davidson, AT 2020 , 'Effects of ocean acidification on Antarctic marine organisms: a meta-analysis' , Ecology and Evolution, vol. 10, no. 10 , pp. 4495-4514 , doi: 10.1002/ece3.6205.

[img]
Preview
PDF
138972 - Effect...pdf | Download (1MB)

| Preview

Abstract

Southern Ocean waters are among the most vulnerable to ocean acidification. The projected increase in the CO2 level will cause changes in carbonate chemistry that are likely to be damaging to organisms inhabiting these waters. A meta‐analysis was undertaken to examine the vulnerability of Antarctic marine biota occupying waters south of 60°S to ocean acidification. This meta‐analysis showed that ocean acidification negatively affects autotrophic organisms, mainly phytoplankton, at CO2 levels above 1,000 μatm and invertebrates above 1,500 μatm, but positively affects bacterial abundance. The sensitivity of phytoplankton to ocean acidification was influenced by the experimental procedure used. Natural, mixed communities were more sensitive than single species in culture and showed a decline in chlorophyll a concentration, productivity, and photosynthetic health, as well as a shift in community composition at CO2 levels above 1,000 μatm. Invertebrates showed reduced fertilization rates and increased occurrence of larval abnormalities, as well as decreased calcification rates and increased shell dissolution with any increase in CO2 level above 1,500 μatm. Assessment of the vulnerability of fish and macroalgae to ocean acidification was limited by the number of studies available. Overall, this analysis indicates that many marine organisms in the Southern Ocean are likely to be susceptible to ocean acidification and thereby likely to change their contribution to ecosystem services in the future. Further studies are required to address the poor spatial coverage, lack of community or ecosystem‐level studies, and the largely unknown potential for organisms to acclimate and/or adapt to the changing conditions.

Item Type: Article
Authors/Creators:Hancock, AM and King, CK and Stark, JS and McMinn, A and Davidson, AT
Keywords: ocean acidification, Antarctic, bacteria, climate change, CO2, fish, invertebrates, macroalgae, pH, phytoplankton, Southern Ocean
Journal or Publication Title: Ecology and Evolution
Publisher: John Wiley & Sons Ltd.
ISSN: 2045-7758
DOI / ID Number: 10.1002/ece3.6205
Copyright Information:

Copyright 2020 The Authors. Licensed under Creative Commons Attribution 4.0 International (CC BY 4.0) https://creativecommons.org/licenses/by/4.0/

Related URLs:
Item Statistics: View statistics for this item

Actions (login required)

Item Control Page Item Control Page
TOP