DOI: 10.1111/gcb.12276
论文题名: Assessing physiological tipping point of sea urchin larvae exposed to a broad range of pH
作者: Dorey N. ; Lançon P. ; Thorndyke M. ; Dupont S.
刊名: Global Change Biology
ISSN: 13541013
出版年: 2013
卷: 19, 期: 11 起始页码: 3355
结束页码: 3367
语种: 英语
英文关键词: Development
; Morphometric
; Ocean acidification
; Physiology
; Strongylocentrotus droebachiensis
Scopus关键词: acidification
; echinoderm
; fertilization (reproduction)
; global change
; larva
; marine ecosystem
; morphology
; morphometry
; pH
; physiological response
; taxonomy
; tolerance
; Echinoidea
; Strongylocentrotus
; Strongylocentrotus droebachiensis
; carbon dioxide
; oxygen
; sea water
; animal
; article
; body size
; chemistry
; development
; growth, development and aging
; histology
; larva
; metabolism
; morphometric
; ocean acidification
; pH
; physiology
; sea urchin
; Strongylocentrotus droebachiensis
; development
; morphometric
; ocean acidification
; physiology
; Strongylocentrotus droebachiensis
; Animals
; Body Size
; Carbon Dioxide
; Hydrogen-Ion Concentration
; Larva
; Oxygen
; Sea Urchins
; Seawater
英文摘要: Our ability to project the impact of global change on marine ecosystem is limited by our poor understanding on how to predict species sensitivity. For example, the impact of ocean acidification is highly species-specific, even in closely related taxa. The aim of this study was to test the hypothesis that the tolerance range of a given species to decreased pH corresponds to their natural range of exposure. Larvae of the green sea urchin Strongylocentrotus droebachiensis were cultured from fertilization to metamorphic competence (29 days) under a wide range of pH (from pHT = 8.0/pCO2 ≈ 480 μatm to pHT = 6.5/pCO2 ≈ 20 000 μatm) covering present (from pHT 8.7 to 7.6), projected near-future variability (from pHT 8.3 to 7.2) and beyond. Decreasing pH impacted all tested parameters (mortality, symmetry, growth, morphometry and respiration). Development of normal, although showing morphological plasticity, swimming larvae was possible as low as pHT ≥ 7.0. Within that range, decreasing pH increased mortality and asymmetry and decreased body length (BL) growth rate. Larvae raised at lowered pH and with similar BL had shorter arms and a wider body. Relative to a given BL, respiration rates and stomach volume both increased with decreasing pH suggesting changes in energy budget. At the lowest pHs (pHT ≤ 6.5), all the tested parameters were strongly negatively affected and no larva survived past 13 days post fertilization. In conclusion, sea urchin larvae appeared to be highly plastic when exposed to decreased pH until a physiological tipping point at pHT = 7.0. However, this plasticity was associated with direct (increased mortality) and indirect (decreased growth) consequences for fitness. © 2013 John Wiley & Sons Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/62291
Appears in Collections: 影响、适应和脆弱性
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作者单位: Department of Biological and Environmental Sciences, Sven Lovén Centre for Marine Sciences - Kristineberg, University of Gothenburg, Fiskebäckskil 45178, Sweden; Royal Swedish Academy of Sciences, Sven Lovén Centre for Marine Sciences - Kristineberg, Fiskebäckskil 45178, Sweden
Recommended Citation:
Dorey N.,Lançon P.,Thorndyke M.,et al. Assessing physiological tipping point of sea urchin larvae exposed to a broad range of pH[J]. Global Change Biology,2013-01-01,19(11)