In situ effects of simulated overfishing and eutrophication on settlement of benthic coral reef invertebrates in the Central Red Sea.

Handle URI:
http://hdl.handle.net/10754/323573
Title:
In situ effects of simulated overfishing and eutrophication on settlement of benthic coral reef invertebrates in the Central Red Sea.
Authors:
Jessen, Christian; Voolstra, Christian R. ( 0000-0003-4555-3795 ) ; Wild, Christian
Abstract:
In the Central Red Sea, healthy coral reefs meet intense coastal development, but data on the effects of related stressors for reef functioning are lacking. This in situ study therefore investigated the independent and combined effects of simulated overfishing through predator/grazer exclusion and simulated eutrophication through fertilizer addition on settlement of reef associated invertebrates on light-exposed and -shaded tiles over 4 months. At the end of the study period invertebrates had almost exclusively colonized shaded tiles. Algae were superior settling competitors on light-exposed tiles. On the shaded tiles, simulated overfishing prevented settlement of hard corals, but significantly increased settlement of polychaetes, while simulated eutrophication only significantly decreased hard coral settlement relative to controls. The combined treatment significantly increased settlement of bryozoans and bivalves compared to controls and individual manipulations, but significantly decreased polychaetes compared to simulated overfishing. These results suggest settlement of polychaetes and hard corals as potential bioindicators for overfishing and eutrophication, respectively, and settlement of bivalves and bryozoans for a combination of both. Therefore, if the investigated stressors are not controlled, phase shifts from dominance by hard corals to that by other invertebrates may occur at shaded reef locations in the Central Red Sea.
KAUST Department:
Red Sea Research Center (RSRC)
Citation:
Jessen C, Voolstra CR, Wild C (2014) In situ effects of simulated overfishing and eutrophication on settlement of benthic coral reef invertebrates in the Central Red Sea . PeerJ 2: e339. doi:10.7717/peerj.339.
Publisher:
PeerJ
Journal:
PeerJ
Issue Date:
8-Apr-2014
DOI:
10.7717/peerj.339
PubMed ID:
24765573
PubMed Central ID:
PMC3994645
Type:
Article
ISSN:
2167-8359
Sponsors:
The study was partially financed through KAUST baseline funds to CRV and partially supported by a DFG grant Wi 2677/6-1 to CW. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.
Additional Links:
https://peerj.com/articles/339/; http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3994645/
Appears in Collections:
Articles; Red Sea Research Center (RSRC)

Full metadata record

DC FieldValue Language
dc.contributor.authorJessen, Christianen
dc.contributor.authorVoolstra, Christian R.en
dc.contributor.authorWild, Christianen
dc.date.accessioned2014-07-22T07:34:25Z-
dc.date.available2014-07-22T07:34:25Z-
dc.date.issued2014-04-08en
dc.identifier.citationJessen C, Voolstra CR, Wild C (2014) In situ effects of simulated overfishing and eutrophication on settlement of benthic coral reef invertebrates in the Central Red Sea . PeerJ 2: e339. doi:10.7717/peerj.339.en
dc.identifier.issn2167-8359en
dc.identifier.pmid24765573en
dc.identifier.doi10.7717/peerj.339en
dc.identifier.urihttp://hdl.handle.net/10754/323573en
dc.description.abstractIn the Central Red Sea, healthy coral reefs meet intense coastal development, but data on the effects of related stressors for reef functioning are lacking. This in situ study therefore investigated the independent and combined effects of simulated overfishing through predator/grazer exclusion and simulated eutrophication through fertilizer addition on settlement of reef associated invertebrates on light-exposed and -shaded tiles over 4 months. At the end of the study period invertebrates had almost exclusively colonized shaded tiles. Algae were superior settling competitors on light-exposed tiles. On the shaded tiles, simulated overfishing prevented settlement of hard corals, but significantly increased settlement of polychaetes, while simulated eutrophication only significantly decreased hard coral settlement relative to controls. The combined treatment significantly increased settlement of bryozoans and bivalves compared to controls and individual manipulations, but significantly decreased polychaetes compared to simulated overfishing. These results suggest settlement of polychaetes and hard corals as potential bioindicators for overfishing and eutrophication, respectively, and settlement of bivalves and bryozoans for a combination of both. Therefore, if the investigated stressors are not controlled, phase shifts from dominance by hard corals to that by other invertebrates may occur at shaded reef locations in the Central Red Sea.en
dc.description.sponsorshipThe study was partially financed through KAUST baseline funds to CRV and partially supported by a DFG grant Wi 2677/6-1 to CW. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.en
dc.language.isoenen
dc.publisherPeerJen
dc.relation.urlhttps://peerj.com/articles/339/en
dc.relation.urlhttp://www.ncbi.nlm.nih.gov/pmc/articles/PMC3994645/en
dc.rightsArchived with thanks to PeerJen
dc.titleIn situ effects of simulated overfishing and eutrophication on settlement of benthic coral reef invertebrates in the Central Red Sea.en
dc.typeArticleen
dc.contributor.departmentRed Sea Research Center (RSRC)en
dc.identifier.journalPeerJen
dc.identifier.pmcidPMC3994645en
dc.eprint.versionPublisher's Version/PDFen
dc.contributor.institutionCoral Reef Ecology Group (CORE), Leibniz Center for Tropical Marine Ecology , Bremen , Germany.en
dc.contributor.institutionCoral Reef Ecology Group (CORE), Leibniz Center for Tropical Marine Ecology , Bremen , Germany ; Faculty of Biology and Chemistry, University of Bremen , Germany.en
dc.contributor.affiliationKing Abdullah University of Science and Technology (KAUST)en
kaust.authorVoolstra, Christian R.en

Related articles on PubMed

All Items in KAUST are protected by copyright, with all rights reserved, unless otherwise indicated.
  • Files 3

    • Thumbnail
      Article - PeerJ - In...
      2742KB


      Article - Full Text
    • Thumbnail
      FigS1.png
      87KB


      Supplemental File 1 - Inorganic nutrient concentrations Dissolved inorganic nitrogen (DIN) and soluble reactive phosphate (SRP) concentrations (μ mol L−1; means ±SE) in the nutrient enrichment treatments (fertilizer & combined) and the non-enriched treatments (control & cage). Small letters (a—SRP; b—DIN) indicate statistical significant differences of p < 0.05 (t-test). DOI: 10.7717/peerj.339/supp-1
    • Thumbnail
      TableS1.docx
      15KB


      Supplemental File 2 - Results of the 3-factorial GLM of invertebrate groups Abbreviations: Cage (C), Fertilizer (F), and Time (T). Significant results are indicated in bold by asterisks. P-values of 0.000 represent values < 0.001. Dashes represent factors that have been excluded by the model reduction. DOI: 10.7717/peerj.339/supp-2
  • Export

  • Share

  • Statistics