Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?

Canopy-forming brown algae support highly productive ecosystems whose decline has been attributed to the interplay of several anthropogenic disturbances. Climate change could have disruptive effects on the biology of these species, but the role of temperature in the development of early life stages...

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Autores principales:	Annalisa Falace, Giuliana Marletta, Gilda Savonitto, Fabio Candotto Carniel, Marina Srijemsi, Stanislao Bevilacqua, Mauro Tretiach, Giuseppina Alongi
Formato:	article
Lenguaje:	EN
Publicado:	Frontiers Media S.A. 2021
Materias:	thermal stress early life stages photosynthetic efficiency marine forest climate change conservation Science Q General. Including nature conservation, geographical distribution QH1-199.5
Acceso en línea:	https://doaj.org/article/d88ae3e22ddd4904a71dda8d91a600ce
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spelling	oai:doaj.org-article:d88ae3e22ddd4904a71dda8d91a600ce2021-11-30T13:19:20ZIs the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?2296-774510.3389/fmars.2021.760637https://doaj.org/article/d88ae3e22ddd4904a71dda8d91a600ce2021-11-01T00:00:00Zhttps://www.frontiersin.org/articles/10.3389/fmars.2021.760637/fullhttps://doaj.org/toc/2296-7745Canopy-forming brown algae support highly productive ecosystems whose decline has been attributed to the interplay of several anthropogenic disturbances. Climate change could have disruptive effects on the biology of these species, but the role of temperature in the development of early life stages is poorly understood. The aim of this study was to assess the response of Ericaria giacconei, a winter-reproducing Southern–Mediterranean endemic species, to thermal stress by testing five temperatures (12, 15, 18, 24, and 28°C) on adults and early stages. Chlorophyll a fluorescence of adult plants was measured at 0, 24, 72, and 120 h on nine fronds in each of the three aquaria per treatment. To assess egg release, zygote settlement, and embryo growth rate, approximately 1,200 receptacles were cultured on six Petri dishes per temperature treatment, and 10 random subsections of 2 ×2 mm were examined in three Petri dishes at 0, 20, 44, and 92 h after fertilization. Adult plants showed a plastic physiological response, and thermal stress had no significant effect on PSII efficiency. Embryos fully developed only at 12 and 15°C. Mortality increased at 18 and 24°C, and no zygotes survived at 28°C. In a scenario of further increasing temperatures, the effects of warming could affect the recruitment of E. giacconei and increase its vulnerability to further stresses. These effects on the survival of early stages, which are the bottleneck for the long-term survival of the species, should be taken into account in conservation and restoration measures to maintain canopy-forming macroalgal populations and associated biodiversity and ecosystem services.Annalisa FalaceGiuliana MarlettaGilda SavonittoFabio Candotto CarnielMarina SrijemsiStanislao BevilacquaMauro TretiachGiuseppina AlongiFrontiers Media S.A.articlethermal stressearly life stagesphotosynthetic efficiencymarine forestclimate changeconservationScienceQGeneral. Including nature conservation, geographical distributionQH1-199.5ENFrontiers in Marine Science, Vol 8 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermal stress early life stages photosynthetic efficiency marine forest climate change conservation Science Q General. Including nature conservation, geographical distribution QH1-199.5
spellingShingle	thermal stress early life stages photosynthetic efficiency marine forest climate change conservation Science Q General. Including nature conservation, geographical distribution QH1-199.5 Annalisa Falace Giuliana Marletta Gilda Savonitto Fabio Candotto Carniel Marina Srijemsi Stanislao Bevilacqua Mauro Tretiach Giuseppina Alongi Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
description	Canopy-forming brown algae support highly productive ecosystems whose decline has been attributed to the interplay of several anthropogenic disturbances. Climate change could have disruptive effects on the biology of these species, but the role of temperature in the development of early life stages is poorly understood. The aim of this study was to assess the response of Ericaria giacconei, a winter-reproducing Southern–Mediterranean endemic species, to thermal stress by testing five temperatures (12, 15, 18, 24, and 28°C) on adults and early stages. Chlorophyll a fluorescence of adult plants was measured at 0, 24, 72, and 120 h on nine fronds in each of the three aquaria per treatment. To assess egg release, zygote settlement, and embryo growth rate, approximately 1,200 receptacles were cultured on six Petri dishes per temperature treatment, and 10 random subsections of 2 ×2 mm were examined in three Petri dishes at 0, 20, 44, and 92 h after fertilization. Adult plants showed a plastic physiological response, and thermal stress had no significant effect on PSII efficiency. Embryos fully developed only at 12 and 15°C. Mortality increased at 18 and 24°C, and no zygotes survived at 28°C. In a scenario of further increasing temperatures, the effects of warming could affect the recruitment of E. giacconei and increase its vulnerability to further stresses. These effects on the survival of early stages, which are the bottleneck for the long-term survival of the species, should be taken into account in conservation and restoration measures to maintain canopy-forming macroalgal populations and associated biodiversity and ecosystem services.
format	article
author	Annalisa Falace Giuliana Marletta Gilda Savonitto Fabio Candotto Carniel Marina Srijemsi Stanislao Bevilacqua Mauro Tretiach Giuseppina Alongi
author_facet	Annalisa Falace Giuliana Marletta Gilda Savonitto Fabio Candotto Carniel Marina Srijemsi Stanislao Bevilacqua Mauro Tretiach Giuseppina Alongi
author_sort	Annalisa Falace
title	Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
title_short	Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
title_full	Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
title_fullStr	Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
title_full_unstemmed	Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?
title_sort	is the south-mediterranean canopy-forming ericaria giacconei (= cystoseira hyblaea) a loser from ocean warming?
publisher	Frontiers Media S.A.
publishDate	2021
url	https://doaj.org/article/d88ae3e22ddd4904a71dda8d91a600ce
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Is the South-Mediterranean Canopy-Forming Ericaria giacconei (= Cystoseira hyblaea) a Loser From Ocean Warming?

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