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dc.contributor.authorRoth, Florian
dc.contributor.authorStuhldreier, Ines
dc.contributor.authorSánchez-Noguera, Celeste
dc.contributor.authorCarvalho, Susana
dc.contributor.authorWild, Christian
dc.date.accessioned2017-12-07T13:16:39Z
dc.date.available2017-12-07T13:16:39Z
dc.date.issued2017-11-20
dc.identifier.citationRoth F, Stuhldreier I, Sánchez-Noguera C, Carvalho S, Wild C (2017) Simulated overfishing and natural eutrophication promote the relative success of a non-indigenous ascidian in coral reefs at the Pacific coast of Costa Rica. Aquatic Invasions 12: 435–446. Available: http://dx.doi.org/10.3391/ai.2017.12.4.02.
dc.identifier.issn1818-5487
dc.identifier.doi10.3391/ai.2017.12.4.02
dc.identifier.urihttp://hdl.handle.net/10754/626328
dc.description.abstractColonial ascidians of the genus Didemnum are common fouling organisms and are typically associated with degraded ecosystems and anthropogenic structures installed in the sea. In this study, however, the non-indigenous ascidian Didemnum cf. perlucidum Monniot F., 1983 was discovered in coral reef environments on the Pacific coast of Costa Rica. Its role in the succession of a benthic community and the impact on biogeochemical features (i.e. reef cementation) was assessed by deploying terracotta settlement tiles on the reef for 24 weeks. Predator exclusion in experimental plots and naturally elevated nutrient concentrations during seasonal coastal upwelling gave insights on how settlers of D. cf. perlucidum succeed under projected environmental change. Exclusion of larger predators and grazers caused an increase of D. cf. perlucidum coverage on tiles from 7 to > 80%. Due to its rapid proliferation, D. cf. perlucidum grew over calcifying reef organisms, such as barnacles, polychaetes, and crustose algae, and significantly decreased the accumulation of inorganic carbon on the settlement tiles by one order of magnitude (4.6 to 0.4 mg C cm). The combination of reduced predation and eutrophication revealed negative synergistic effects on the accumulation of inorganic carbon. The opportunistic reaction of D. cf. perlucidum to environmental changes was further evident by 2-fold increased growth rates that were positively correlated (r = 0.89) to seawater particulate organic matter (POM) concentration during coastal upwelling. These results suggest that D. cf. perlucidum is a strong spatial competitor in Eastern Tropical Pacific coral reefs that face changing environmental conditions, e.g. overfishing and eutrophication. The effects of this species on disturbed benthic communities, but also its potential role as a habitat modifier, is likely significant. Thus, a continuous monitoring of D. cf. perlucidum is recommended to better understand their effects on post-disturbance dynamics in coral reef ecosystems.
dc.description.sponsorshipThis study was supported by a German Academic Exchange Service (DAAD) scholarship to the first author. S. Carvalho is funded by the Saudi Aramco-KAUST Center for Marine Environmental Observations (SAKMEO). We thank the Centro de Investigación en Ciencias del Mar y Limnología (CIMAR) at the University of Costa Rica in San José for logistical support. We also would like to acknowledge the laboratory assistance team of the Leibniz Center for Tropical Marine Ecology (ZMT) D. Dasbach, M. Birkicht and D. Peterke. We thank João Cúrida for his artistry in the production of Figure 1, C. We thank the anonymous reviewers, and the editors of Aquatic Invasions for their careful reading of our manuscript and their insightful comments and suggestions.
dc.publisherRegional Euro-Asian Biological Invasions Centre Oy (REABIC)
dc.relation.urlhttp://www.aquaticinvasions.net/2017/AI_2017_Roth_etal.pdf
dc.rightsAuthors of articles published in Aquatic Invasions retain the copyright of their articles and are free to reproduce and disseminate their work under the terms of the Creative Commons Attribution License (Attribution 2.0 Generic - CC BY 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
dc.rights.urihttp://creativecommons.org/licenses/by/2.0
dc.subjectBenthic community structure
dc.subjectBiofouling
dc.subjectDidemnum perlucidum
dc.subjectPhase shifts
dc.subjectRecruitment
dc.subjectSettlement plates
dc.titleSimulated overfishing and natural eutrophication promote the relative success of a non-indigenous ascidian in coral reefs at the Pacific coast of Costa Rica
dc.typeArticle
dc.contributor.departmentRed Sea Research Center (RSRC)
dc.identifier.journalAquatic Invasions
dc.eprint.versionPublisher's Version/PDF
dc.contributor.institutionFaculty of Biology and Chemistry, University of Bremen, Bremen, 28369, , Germany
dc.contributor.institutionCentro de Investigación en Ciencias del Mar y Limnología (CIMAR), Escuela de Biología, Universidad de Costa Rica, San José, , Costa Rica
kaust.personRoth, Florian
kaust.personCarvalho, Susana
refterms.dateFOA2018-06-13T12:15:36Z


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Authors of articles published in Aquatic Invasions retain the copyright of their articles and are free to reproduce and disseminate their work under the terms of the Creative Commons Attribution License (Attribution 2.0 Generic - CC BY 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
Except where otherwise noted, this item's license is described as Authors of articles published in Aquatic Invasions retain the copyright of their articles and are free to reproduce and disseminate their work under the terms of the Creative Commons Attribution License (Attribution 2.0 Generic - CC BY 2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.