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  • Eggertsen, MariaStockholms universitet,Institutionen för ekologi, miljö och botanik,Stockholm University, Sweden (author)

Coral-macroalgal interactions : Herbivory and substrate type influence growth of the macroalgae Eucheuma denticulatum (N.L. Burman) Collins & Hervey, 1917 on a tropical coral reef

  • Article/chapterEnglish2021

Publisher, publication year, extent ...

  • Elsevier BV,2021
  • printrdacarrier

Numbers

  • LIBRIS-ID:oai:DiVA.org:su-198302
  • https://urn.kb.se/resolve?urn=urn:nbn:se:su:diva-198302URI
  • https://doi.org/10.1016/j.jembe.2021.151606DOI
  • https://urn.kb.se/resolve?urn=urn:nbn:se:sh:diva-46321URI
  • https://res.slu.se/id/publ/113376URI

Supplementary language notes

  • Language:English
  • Summary in:English

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  • Subject category:ref swepub-contenttype
  • Subject category:art swepub-publicationtype

Notes

  • This work was supported by Albert & Maria Bergström's Foundation and the Swedish Research Council [grant numbers 2014-3264, 2015-05848 and E0344801].
  • Introduced macroalgae becoming invasive may alter ecological functions and habitats in recipient ecosystems. In the Western Indian Ocean (WIO), non-native strains of the native macroalgae Eucheuma denticulatum were introduced for farming practices and consequently spread into the surrounding seascape. We investigated potential effects of non-native and native strains of this macroalgae on a branching coral. We conducted a four-factor field experiment where we examined growth and holdfast development of introduced and native E. denticulatum on live and dead branches of Acropora sp. in the presence and absence of herbivores in Unguja Island, Zanzibar. Moreover, we estimated coral and macroalgae condition by visual examinations, gene expression analyses, and photosynthetic measurements. Macroalgae did not attach to any live coral and coral condition was not impacted by the presence of E. denticulatum, regardless of geographical origin. Instead, necrotic tissue on the macroalgae in areas of direct contact with corals indicated damage inflicted by the coral. The biomass of E. denticulatum did not differ between the replicates attached to live or dead corals in the experiment, yet biomass was strongly influenced by herbivory and replicates without protection from herbivores had a significantly lower biomass. In the absence of herbivory, introduced E. denticulatum had significantly higher growth rates than native algae based on wet weight measurements. These results contribute to an increased understanding of environmental effects by the farming of a non-native strain of algae on corals and stresses the importance to maintain viable populations of macroalgal feeding fishes in such areas.

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  • Larsson, JosefineSödertörns högskola,Miljövetenskap(Swepub:sh)shjeln08 (author)
  • Porseryd, ToveSödertörns högskola,Miljövetenskap(Swepub:sh)shtepd12 (author)
  • Åkerlund, CarolinaStockholms universitet,Institutionen för ekologi, miljö och botanik,Stockholm University, Sweden(Swepub:su)caak4706 (author)
  • Chacin, D. H.University of South Florida, USA,Stockholm University, Sweden (author)
  • Berkström, CharlotteSwedish University of Agricultural Sciences,Sveriges lantbruksuniversitet,Stockholms universitet,Institutionen för ekologi, miljö och botanik,Stockholm University, Sweden; Swedish University of Agricultural Sciences, Sweden,Institutionen för akvatiska resurser,Department of Aquatic Resources(Swepub:su)chbe8838 (author)
  • Jiddawi, N.Institute of Fisheries Research, Tanzania (author)
  • Kautsky, NilsStockholms universitet,Institutionen för ekologi, miljö och botanik,Stockholm University, Sweden(Swepub:su)nkaut (author)
  • Halling, ChristinaStockholms universitet,Institutionen för ekologi, miljö och botanik(Swepub:su)halli (author)
  • Stockholms universitetInstitutionen för ekologi, miljö och botanik (creator_code:org_t)
  • Sveriges lantbruksuniversitet

Related titles

  • In:Journal of Experimental Marine Biology and Ecology: Elsevier BV5420022-09811879-1697

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