The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator

Predicting the myriad effects of climate change on ecological communities is a major challenge for scientists, and to date relatively few studies have focused on the effects of sea freshening on species interactions. In particular, changes in keystone species predatory effects could be pervasive. He...

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Autores principales:	James W.E. Dickey, Ross N. Cuthbert, Sonia C. Morón Lugo, Isabel Casties, Jaimie T.A. Dick, Gregor T. Steffen, Elizabeta Briski
Formato:	article
Lenguaje:	EN
Publicado:	Elsevier 2021
Materias:	Asterias rubens Functional response Keystone predator Numerical response Predator-prey interaction Sea freshening Ecology QH540-549.5
Acceso en línea:	https://doaj.org/article/7e1eb91eb8304689b0b9921e286fe392
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spelling	oai:doaj.org-article:7e1eb91eb8304689b0b9921e286fe3922021-12-01T05:01:58ZThe stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator1470-160X10.1016/j.ecolind.2021.108293https://doaj.org/article/7e1eb91eb8304689b0b9921e286fe3922021-12-01T00:00:00Zhttp://www.sciencedirect.com/science/article/pii/S1470160X21009584https://doaj.org/toc/1470-160XPredicting the myriad effects of climate change on ecological communities is a major challenge for scientists, and to date relatively few studies have focused on the effects of sea freshening on species interactions. In particular, changes in keystone species predatory effects could be pervasive. Here, we assess the consequences of decreasing salinity on the ecological impact exerted by a keystone predatory sea star, Asterias rubens. We quantified sea star functional responses (FRs; per capita predation as a function of prey density) under decreasing salinity treatments aligned with climate change projections (18ppt, 15ppt, 12ppt). Furthermore, we combined FRs with larval recruitment estimates, i.e. ecological “Impact Potential”, to act as an ecological indicator of predator population-level responses under this environmental change. Attack and maximum feeding rates of sea stars were reduced by decreasing salinities, with no instances of predation found at 12ppt. Given that decreasing salinities also reduced larval sea star recruitment, the overall Impact Potential of this keystone predator species was lessened by decreased salinity. Sea freshening projections by the end of this century could thus drive significant decreases in the effects of this keystone predator, with serious implications for the structuring and functioning of ecological communities.James W.E. DickeyRoss N. CuthbertSonia C. Morón LugoIsabel CastiesJaimie T.A. DickGregor T. SteffenElizabeta BriskiElsevierarticleAsterias rubensFunctional responseKeystone predatorNumerical responsePredator-prey interactionSea fresheningEcologyQH540-549.5ENEcological Indicators, Vol 132, Iss , Pp 108293- (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Asterias rubens Functional response Keystone predator Numerical response Predator-prey interaction Sea freshening Ecology QH540-549.5
spellingShingle	Asterias rubens Functional response Keystone predator Numerical response Predator-prey interaction Sea freshening Ecology QH540-549.5 James W.E. Dickey Ross N. Cuthbert Sonia C. Morón Lugo Isabel Casties Jaimie T.A. Dick Gregor T. Steffen Elizabeta Briski The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
description	Predicting the myriad effects of climate change on ecological communities is a major challenge for scientists, and to date relatively few studies have focused on the effects of sea freshening on species interactions. In particular, changes in keystone species predatory effects could be pervasive. Here, we assess the consequences of decreasing salinity on the ecological impact exerted by a keystone predatory sea star, Asterias rubens. We quantified sea star functional responses (FRs; per capita predation as a function of prey density) under decreasing salinity treatments aligned with climate change projections (18ppt, 15ppt, 12ppt). Furthermore, we combined FRs with larval recruitment estimates, i.e. ecological “Impact Potential”, to act as an ecological indicator of predator population-level responses under this environmental change. Attack and maximum feeding rates of sea stars were reduced by decreasing salinities, with no instances of predation found at 12ppt. Given that decreasing salinities also reduced larval sea star recruitment, the overall Impact Potential of this keystone predator species was lessened by decreased salinity. Sea freshening projections by the end of this century could thus drive significant decreases in the effects of this keystone predator, with serious implications for the structuring and functioning of ecological communities.
format	article
author	James W.E. Dickey Ross N. Cuthbert Sonia C. Morón Lugo Isabel Casties Jaimie T.A. Dick Gregor T. Steffen Elizabeta Briski
author_facet	James W.E. Dickey Ross N. Cuthbert Sonia C. Morón Lugo Isabel Casties Jaimie T.A. Dick Gregor T. Steffen Elizabeta Briski
author_sort	James W.E. Dickey
title	The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
title_short	The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
title_full	The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
title_fullStr	The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
title_full_unstemmed	The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
title_sort	stars are out: predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator
publisher	Elsevier
publishDate	2021
url	https://doaj.org/article/7e1eb91eb8304689b0b9921e286fe392
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The stars are out: Predicting the effect of seawater freshening on the ecological impact of a sea star keystone predator

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