European Lobster Larval Development and Fitness Under a Temperature Gradient and Ocean Acidification


Contact
Maarten.Boersma [ at ] awi.de

Abstract

<jats:p>Climate change combined with anthropogenic stressors (e.g. overfishing, habitat destruction) may have particularly strong effects on threatened populations of coastal invertebrates. The collapse of the population of European lobster (<jats:italic>Homarus gammarus</jats:italic>) around Helgoland constitutes a good example and prompted a large-scale restocking program. The question arises if recruitment of remaining natural individuals and program-released specimens could be stunted by ongoing climate change. We examined the joint effect of ocean warming and acidification on survival, development, morphology, energy metabolism and enzymatic antioxidant activity of the larval stages of the European lobster. Larvae from four independent hatches were reared from stage I to III under a gradient of 10 seawater temperatures (13–24°C) combined with moderate (∼470 µatm) and elevated (∼1160 µatm) seawater <jats:italic>p</jats:italic>CO<jats:sub>2</jats:sub> treatments. Those treatments correspond to the shared socio-economic pathways (SSP), SSP1-2.6 and SSP5-8.5 (i.e. the low and the very high greenhouse gas emissions respectively) projected for 2100 by the Intergovernmental Panel on Climate Change. Larvae under the elevated <jats:italic>p</jats:italic>CO<jats:sub>2</jats:sub> treatment had not only lower survival rates, but also significantly smaller rostrum length. However, temperature was the main driver of energy demands with increased oxygen consumption rates and elemental C:N ratio towards warmer temperatures, with a reducing effect on development time. Using this large temperature gradient, we provide a more precise insight on the aerobic thermal window trade-offs of lobster larvae and whether exposure to the worst hypercapnia scenario may narrow it. This may have repercussions on the recruitment of the remaining natural and program-released specimens and thus, in the enhancement success of future lobster stocks.</jats:p>



Item Type
Article
Authors
Divisions
Primary Division
Programs
Primary Topic
Publication Status
Published online
Eprint ID
57027
DOI 10.3389/fphys.2022.809929

Cite as
Leiva, L. , Tremblay, N. , Torres, G. , Boersma, M. , Krone, R. and Giménez, L. (2022): European Lobster Larval Development and Fitness Under a Temperature Gradient and Ocean Acidification , Frontiers in Physiology, 13 , 809929- . doi: 10.3389/fphys.2022.809929


Download
[thumbnail of European Lobster Larval Development and Fitness Under a Temperature Gradient and Ocean Acidification.pdf]
Preview
PDF
European Lobster Larval Development and Fitness Under a Temperature Gradient and Ocean Acidification.pdf

Download (2MB) | Preview

Share


Citation


Actions
Edit Item Edit Item