DOI: 10.1111/gcb.12735
论文题名: Could the acid-base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?
作者: Collard M. ; De Ridder C. ; David B. ; Dehairs F. ; Dubois P.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2015
卷: 21, 期: 2 起始页码: 605
结束页码: 617
语种: 英语
英文关键词: Acid-base regulation
; Antarctica
; Echinoderms
; Ocean acidification
; Sea urchins
; Southern Ocean
Scopus关键词: acidification
; bioindicator
; calcification
; carbon dioxide
; concentration (composition)
; echinoderm
; global change
; hydrochemistry
; mixing
; pH
; Antarctica
; Southern Ocean
; Cidaroida
; Echinodermata
; Echinoida
; Echinoidea
; Euechinoidea
; Metazoa
; sea water
; acid base balance
; animal
; Antarctica
; chemistry
; climate change
; physiology
; sea urchin
; Acid-Base Equilibrium
; Animals
; Antarctic Regions
; Climate Change
; Sea Urchins
; Seawater
英文摘要: Increasing atmospheric carbon dioxide concentration alters the chemistry of the oceans towards more acidic conditions. Polar oceans are particularly affected due to their low temperature, low carbonate content and mixing patterns, for instance upwellings. Calcifying organisms are expected to be highly impacted by the decrease in the oceans' pH and carbonate ions concentration. In particular, sea urchins, members of the phylum Echinodermata, are hypothesized to be at risk due to their high-magnesium calcite skeleton. However, tolerance to ocean acidification in metazoans is first linked to acid-base regulation capacities of the extracellular fluids. No information on this is available to date for Antarctic echinoderms and inference from temperate and tropical studies needs support. In this study, we investigated the acid-base status of 9 species of sea urchins (3 cidaroids, 2 regular euechinoids and 4 irregular echinoids). It appears that Antarctic regular euechinoids seem equipped with similar acid-base regulation systems as tropical and temperate regular euechinoids but could rely on more passive ion transfer systems, minimizing energy requirements. Cidaroids have an acid-base status similar to that of tropical cidaroids. Therefore Antarctic cidaroids will most probably not be affected by decreasing seawater pH, the pH drop linked to ocean acidification being negligible in comparison of the naturally low pH of the coelomic fluid. Irregular echinoids might not suffer from reduced seawater pH if acidosis of the coelomic fluid pH does not occur but more data on their acid-base regulation are needed. Combining these results with the resilience of Antarctic sea urchin larvae strongly suggests that these organisms might not be the expected victims of ocean acidification. However, data on the impact of other global stressors such as temperature and of the combination of the different stressors needs to be acquired to assess the sensitivity of these organisms to global change. © 2014 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61562
Appears in Collections: 影响、适应和脆弱性
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作者单位: Laboratoire de Biologie Marine, Université Libre de Bruxelles, 50 avenue F.D. Roosevelt, Brussels, Belgium; Analytical, Environmental and Geo-Chemistry, Earth Systems Science Research Group, Vrije Universiteit Brussel, Pleinlaan 2, Brussels, Belgium; Biogéosciences, UMR CNRS 6282, Université de Bourgogne, 6 boulevard Gabriel, Dijon, France
Recommended Citation:
Collard M.,De Ridder C.,David B.,et al. Could the acid-base status of Antarctic sea urchins indicate a better-than-expected resilience to near-future ocean acidification?[J]. Global Change Biology,2015-01-01,21(2)