Early reproductive stages in the crustose coralline alga Phymatolithon lenormandii are strongly affected by mild ocean acidification.

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.

Cumani, F (författare)
Bressan, G (författare)
Dupont, Samuel,1971Gothenburg University,Göteborgs universitet,Linnécentrum för marin evolutionsbiologi (CEMEB),Institutionen för biologi och miljövetenskap,Linnaeus Centre for Marine Evolutionary Biology (CEMEB),Department of Biological and Environmental Sciences(Swepub:gu)xdupsa (författare)
Göteborgs universitetLinnécentrum för marin evolutionsbiologi (CEMEB) (creator_code:org_t)

Ingår i:Marine Biology: Springer Science and Business Media LLC160:8, s. 2261-22690025-31621432-1793

Av författaren/redakt...: Bradassi, F; Cumani, F; Bressan, G; Dupont, Samuel, ...

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