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Early reproductive stages in the crustose coralline alga Phymatolithon lenormandii are strongly affected by mild ocean acidification
Bradassi, F.; Cumani, F.; Bressan, G.; Dupont, S. (2013). Early reproductive stages in the crustose coralline alga Phymatolithon lenormandii are strongly affected by mild ocean acidification. Mar. Biol. (Berl.) 160(8): 2261-2269. https://dx.doi.org/10.1007/s00227-013-2260-2
In: Marine Biology: International Journal on Life in Oceans and Coastal Waters. Springer: Heidelberg; Berlin. ISSN 0025-3162; e-ISSN 1432-1793, more
Peer reviewed article  
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Keywords
    Climate Change
    Environmental Managers & Monitoring
    Marine Sciences > Marine Sciences General
    Marine Sciences > Oceanography
    Policy Makers / Decision Makers
    Scientific Community
    Scientific Publication
    Marine/Coastal
Project Top | Authors 
  • Association of European marine biological laboratories, more
Authors  Top 
  • Bradassi, F.
  • Cumani, F.
  • Bressan, G.
  • Dupont, S.
Abstract
    Coralline algae (Corallinales, Rhodophyta) are predicted to be negatively impacted by near-future ocean acidification. The effect of low pH/high pCO2 on early life stages of Phymatolithon lenormandii (Areschoug) Adey was studied in a perturbation experiment. Several parameters including mortality, calcification (calcein staining) and development (growth and abnormalities) have been monitored for a month under experimental conditions ranging from pHT = 8.00 (pCO2 = 398 μatm) and pHT = 7.55 (pCO2 = 1,261 μatm). Our results demonstrate that survival and development of P. lenormandii early life stages can be impacted by small pH changes (ΔpH < −0.1 pH unit). A negative impact of decreasing pH was observed including an increased mortality and a higher rate of abnormalities. Growth and calcification were still observed at the lowest pH (ΔpH = −0.45). Growth rate was similar at all tested pH, but the maintenance of the skeleton under low pH was only possible through a persistent dynamic dissolution/calcification process, an energetically costly mechanism potentially draining resources from other vital processes.
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