Research article2018Peer reviewedOpen access
No maternal or direct effects of ocean acidification on egg hatching in the Arctic copepod Calanus glacialis
Thor, Peter; Vermandele, Fanny; Carignan, Marie-Helene; Jacque, Sarah; Calosi, Piero
Abstract
Widespread ocean acidification (OA) is transforming the chemistry of the global ocean and the Arctic is recognised as the region where this transformation will occur at the fastest rate. Moreover, many Arctic species are considered less capable of tolerating OA due to their lower capacity for acid-base regulation. This inability may put severe restraints on many fundamental functions, such as growth and reproductive investments, which ultimately may result in reduced fitness. However, maternal effects may alleviate severe effects on the offspring rendering them more tolerant to OA. In a highly replicated experiment we studied maternal and direct effects of OA predicted for the Arctic shelf seas on egg hatching time and success in the keystone copepod species Calanus glacialis. We incubated females at present day conditions (pH(T) 8.0) and year 2100 extreme conditions (pH(T) 7.5) during oogenesis and subsequently reciprocally transplanted laid eggs between these two conditions. Statistical tests showed no effects of maternal or direct exposure to OA at this level. We hypothesise that C. glacialis may be physiologically adapted to egg production at low pH since oogenesis can also take place at conditions of potentially low haemolymph pH of the mother during hibernation in the deep.
Published in
PLoS ONE
2018, Volume: 13, number: 2, article number: e0192496
Publisher: PUBLIC LIBRARY SCIENCE
UKÄ Subject classification
Environmental Sciences
Ecology
Publication identifier
DOI: https://doi.org/10.1371/journal.pone.0192496
Permanent link to this page (URI)
https://res.slu.se/id/publ/120113