The combined effects of climate change stressors and predatory cues on a mussel species

Manríquez, Patricio H., Jara, María Elisa, González, Claudio P., Seguel, Mylene E., Domenici, Paolo, Watson, Sue-Ann, Anguita, Cristóbal, Duarte, Cristian, and Brokordt, Katherina (2021) The combined effects of climate change stressors and predatory cues on a mussel species. Science of the Total Environment, 776. 145916.

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Abstract

In order to make adequate projections on the consequences of climate change stressors on marine organisms, it is important to know how impacts of these stressors are affected by the presence of other species. Here we assessed the direct effects of ocean warming (OW) and acidification (OA) along with non-consumptive effects (NCEs) of a predatory crab and/or a predatory snail on the habitat-forming mussel Perumytilus purpuratus. Mussels were exposed for 10–14 weeks to contrasting pCO2 (500 and 1400 μatm) and temperature (15 and 20 °C) levels, in the presence/absence of cues from one or two predator species. We compared mussel traits at sub-organismal (nutritional status, metabolic capacity-ATP production-, cell stress condition via HSP70 expression) and organismal (survival, oxygen consumption, growth, byssus biogenesis, clearance rates, aggregation) levels. OA increased the mussels' oxygen consumption; and OA combined with OW increased ATP demand and the use of carbohydrate reserves. Mussels at present-day pCO2 levels had the highest protein content. Under OW the predatory snail cues induced the highest cell stress condition on the mussels. Temperature, predator cues and the interaction between them affected mussel growth. Mussels grew larger at the control temperature (15 °C) when crab and snail cues were present. Mussel wet mass and calcification were affected by predator cues; with highest values recorded in crab cue presence (isolated or combined with snail cues). In the absence of predator cues in the trails, byssus biogenesis was affected by OA, OW and the OA × OW and OA × predator cues interactions. At present-day pCO2 levels, more byssus was recorded with snail than with crab cues. Clearance rates were affected by temperature, pCO2 and the interaction between them. The investigated stressors had no effects on mussel aggregation. We conclude that OA, OW and the NCEs may lead to neutral, positive or negative consequences for mussels.

Item ID: 67051
Item Type: Article (Research - C1)
ISSN: 1879-1026
Keywords: Climate change biology, Non-consumptive effects, Ocean acidification, Ocean warming, Organismal-level traits
Copyright Information: © 2021 Published by Elsevier B.V.
Funders: National Commission for Scientific and Technological Research (CONICYT), Climate driven Changes in the Habitat Suitability of Marine Organisms (CLIMAR)
Projects and Grants: CONICYT Grant No 1181609, CLIMAR ELAC2015/T01-0495
Date Deposited: 07 Jul 2021 22:28
FoR Codes: 31 BIOLOGICAL SCIENCES > 3103 Ecology > 310305 Marine and estuarine ecology (incl. marine ichthyology) @ 30%
31 BIOLOGICAL SCIENCES > 3199 Other biological sciences > 319902 Global change biology @ 40%
31 BIOLOGICAL SCIENCES > 3109 Zoology > 310913 Invertebrate biology @ 30%
SEO Codes: 18 ENVIRONMENTAL MANAGEMENT > 1805 Marine systems and management > 180501 Assessment and management of benthic marine ecosystems @ 20%
19 ENVIRONMENTAL POLICY, CLIMATE CHANGE AND NATURAL HAZARDS > 1905 Understanding climate change > 190507 Global effects of climate change (excl. Australia, New Zealand, Antarctica and the South Pacific) (excl. social impacts) @ 50%
28 EXPANDING KNOWLEDGE > 2801 Expanding knowledge > 280102 Expanding knowledge in the biological sciences @ 30%
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