On the evolutionary responses of the calanoid copepod Acartia tonsa towards ocean acidification: insights from a long-term laboratory selection study, link to supplementary material ...

• Main Authors: Langer, Julia A F, Meunier, Cédric Léo, Ecker, Ursula, Horn, Henriette G, Schwenk, Klaus, Boersma, Maarten
• Format: Dataset
• Language: English
• Published: PANGAEA 2017
• Subjects: Biological Impacts of Ocean Acidification BIOACID; Ocean acidification; Copepods
• Online Access: https://dx.doi.org/10.1594/pangaea.879370; https://doi.pangaea.de/10.1594/PANGAEA.879370

The ongoing acidification process of the oceans is likely to have consequences for many marine biota. Although evolutionary responses are expected during persisting environmental change, little is known about the adaptability of copepods. Therefore, we set up a 3 ½ years long selection experiment, culturing Acartia tonsa populations in water treated with 200 and 800 µatm pCO2, feeding them with algae grown in f/2 medium under 200 µatm pCO2 and in f/2 N P medium under 800 µatm pCO2. After three reciprocal transplant experiments we measured copepods' developmental rates, carbon to nutrient ratios, egg production and hatching rates. Under high CO2 conditions, stoichiometric discrepancies between the requirements of A. tonsa and its food resulted in a significantly decreased developmental rate independent from the selective history. After one year, these discrepancies appeared alleviated by an optimised homeostasis regulation of the copepods, indicating a high body stoichiometry regulation plasticity. Egg ... : Supplement to: Langer, Julia A F; Meunier, Cédric Léo; Ecker, Ursula; Horn, Henriette G; Schwenk, Klaus; Boersma, Maarten (2019): Acclimation and adaptation of the coastal calanoid copepod Acartia tonsa to ocean acidification: a long-term laboratory investigation. Marine Ecology Progress Series, 619, 35-51 ...