Stable photosymbiotic relationship under CO2-induced acidification in the acoel worm Symsagittifera roscoffensis

Dupont, Sam, Moya, Aurélie, and Bailly, Xavier (2012) Stable photosymbiotic relationship under CO2-induced acidification in the acoel worm Symsagittifera roscoffensis. PLoS ONE, 7 (1). e29568. pp. 1-8.

[img]
Preview
PDF (Published Version) - Published Version
Available under License Creative Commons Attribution.

Download (621kB)
View at Publisher Website: http://dx.doi.org/10.1371/journal.pone.0...
 
13
89


Abstract

As a consequence of anthropogenic CO₂ emissions, oceans are becoming more acidic, a phenomenon known as ocean acidification. Many marine species predicted to be sensitive to this stressor are photosymbiotic, including corals and foraminifera. However, the direct impact of ocean acidification on the relationship between the photosynthetic and nonphotosynthetic organism remains unclear and is complicated by other physiological processes known to be sensitive to ocean acidification (e.g. calcification and feeding). We have studied the impact of extreme pH decrease/pCO₂ increase on the complete life cycle of the photosymbiotic, non-calcifying and pure autotrophic acoel worm, Symsagittifera roscoffensis. Our results show that this species is resistant to high pCO₂ with no negative or even positive effects on fitness (survival, growth, fertility) and/or photosymbiotic relationship till pCO₂ up to 54 K µatm. Some sub-lethal bleaching is only observed at pCO₂ up to 270 K µatm when seawater is saturated by CO₂. This indicates that photosymbiosis can be resistant to high pCO₂. If such a finding would be confirmed in other photosymbiotic species, we could then hypothesize that negative impact of high pCO₂ observed on other photosymbiotic species such as corals and foraminifera could occur through indirect impacts at other levels (calcification, feeding).

Item ID: 25698
Item Type: Article (Research - C1)
ISSN: 1932-6203
Date Deposited: 20 Mar 2013 23:46
FoR Codes: 06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 100%
SEO Codes: 96 ENVIRONMENT > 9608 Flora, Fauna and Biodiversity > 960802 Coastal and Estuarine Flora, Fauna and Biodiversity @ 100%
Downloads: Total: 89
Last 12 Months: 18
More Statistics

Actions (Repository Staff Only)

Item Control Page Item Control Page