Parental exposure to ocean acidification impacts gamete production and physiology but not offspring performance in Nematostella vectensis.

Autor:	Glass BH; Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA., Schmitt AH; Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA., Brown KT; Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA., Speer KF; Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA., Barott KL; Department of Biology, University of Pennsylvania, Philadelphia, PA 19104, USA.
Jazyk:	angličtina
Zdroj:	Biology open [Biol Open] 2023 Mar 15; Vol. 12 (3). Date of Electronic Publication: 2023 Feb 28.
DOI:	10.1242/bio.059746
Abstrakt:	Ocean acidification (OA) resulting from anthropogenic CO2 emissions is impairing the reproduction of marine organisms. While parental exposure to OA can protect offspring via carryover effects, this phenomenon is poorly understood in many marine invertebrate taxa. Here, we examined how parental exposure to acidified (pH 7.40) versus ambient (pH 7.72) seawater influenced reproduction and offspring performance across six gametogenic cycles (13 weeks) in the estuarine sea anemone Nematostella vectensis. Females exhibited reproductive plasticity under acidic conditions, releasing significantly fewer but larger eggs compared to ambient females after 4 weeks of exposure, and larger eggs in two of the four following spawning cycles despite recovering fecundity, indicating long-term acclimatization and greater investment in eggs. Males showed no changes in fecundity under acidic conditions but produced a greater percentage of sperm with high mitochondrial membrane potential (MMP; a proxy for elevated motility), which corresponded with higher fertilization rates relative to ambient males. Finally, parental exposure to acidic conditions did not significantly influence offspring development rates, respiration rates, or heat tolerance. Overall, this study demonstrates that parental exposure to acidic conditions impacts gamete production and physiology but not offspring performance in N. vectensis, suggesting that increased investment in individual gametes may promote fitness. Competing Interests: Competing interests The authors declare no competing or financial interests. (© 2023. Published by The Company of Biologists Ltd.)
Databáze:	MEDLINE
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