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Rhodolith primary and carbonate production in a changing ocean: The interplay of warming and nutrients

dc.contributor.authorSchubert, N.
dc.contributor.authorSalazar, V. W.
dc.contributor.authorRich, W. A.
dc.contributor.authorVivanco Bercovich, M.
dc.contributor.authorAlmeida Saa, A. C.
dc.contributor.authorFadigas, S. D.
dc.contributor.authorSilva, João
dc.contributor.authorHorta, P. A.
dc.date.accessioned2020-07-24T10:51:55Z
dc.date.available2020-07-24T10:51:55Z
dc.date.issued2019-08
dc.description.abstractRhodolith beds, like many other marine ecosystems, are affected by climate change that is causing an increase in the magnitude and frequency of extreme high temperature events (heat waves). Unfortunately, this does not represent the sole peril for these communities, as coastal urbanization in conjunction with altered precipitation patterns can increase terrestrial-derived nutrient input. In Brazil, rhodolith beds are among the most extensive coastal benthic ecosystems, but despite their vast distribution and great ecological and economic importance, studies on the productivity of these communities and the impact of changing environmental conditions are almost non-existent. This study addressed the individual and combined effects of increases in temperature and nutrient concentration on the physiological performance of two widely distributed rhodolith species, Lithothamnion crispatum and Melyvonnea erubescens. The results showed species-specific responses in net photosynthetic performance, with no response in L. crispatum, while M. erubescens responded negatively to both increase in temperature and nutrients. In contrast, calcification in both species showed a significant decline at high temperature. No interactive effects were found between temperature and nutrients, yet their combined negative effects were additive, resulting in negative daily-integrated net productivity and a large decline in daily carbonate production in both species. This has strong implications for rhodolith bed primary productivity and carbonate production, as heat waves may potentially cause a strong decline in carbonate production (ca. 50% loss), accompanied by a severe drop in primary productivity that will be even more pronounced under high-nutrient conditions. Also, the species-specific responses to changes in temperature and nutrient concentration suggest that the magnitude of impact of these factors on rhodolith bed productivity will depend on the species dominating the community and may finally result in changes in rhodolith community composition. (C) 2019 Elsevier B.V. All rights reserved.
dc.description.sponsorshipFINEP/Rede CLIMA [01.13.0353-00]
dc.description.sponsorshipCNPqNational Council for Scientific and Technological Development (CNPq) [426215/2016-8]
dc.description.sponsorshipPELD-ILOC [403740/2012-6]
dc.description.sponsorshipCoordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brasil (CAPES)CAPES [001]
dc.description.sponsorshipFCT-Foundation for Science and TechnologyPortuguese Foundation for Science and Technology [UID/Multi/04326/2019]
dc.description.sponsorshipIniciacao a Pesquisa-BIP/UFSC 2016/2017, Programa Institucional de Bolsas de Iniciacao Cientifica-PIBIC/CNPq
dc.identifier.doi10.1016/j.scitotenv.2019.04.280
dc.identifier.issn0048-9697
dc.identifier.issn1879-1026
dc.identifier.urihttp://hdl.handle.net/10400.1/14289
dc.language.isoeng
dc.peerreviewedyes
dc.publisherElsevier
dc.subjectNitrate reductase-activity
dc.subjectElevated seawater temperature
dc.subjectCrustose coralline algae
dc.subjectClimate-change
dc.subjectRed alga
dc.subjectPhysiological-responses
dc.subjectCalcification rates
dc.subjectCommunity structure
dc.subjectMarine heatwaves
dc.subjectAtlantic shelf
dc.titleRhodolith primary and carbonate production in a changing ocean: The interplay of warming and nutrients
dc.typejournal article
dspace.entity.typePublication
oaire.citation.endPage468
oaire.citation.startPage455
oaire.citation.titleScience of the Total Environment
oaire.citation.volume676
person.familyNameSilva
person.givenNameJoão
person.identifier82814
person.identifier.ciencia-id8216-527E-1BD4
person.identifier.orcid0000-0002-7211-1661
person.identifier.ridJ-7874-2013
person.identifier.scopus-author-id7403023547
rcaap.rightsrestrictedAccess
rcaap.typearticle
relation.isAuthorOfPublication61040b53-b17a-40f6-b42e-f5476a7a6ddb
relation.isAuthorOfPublication.latestForDiscovery61040b53-b17a-40f6-b42e-f5476a7a6ddb

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