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Knowledge gaps and management recommendations for future paths of sustainable seaweed farming in the Western Indian Ocean
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
Stockholm University, Faculty of Science, Department of Ecology, Environment and Plant Sciences.
Number of Authors: 22020 (English)In: Ambio, ISSN 0044-7447, E-ISSN 1654-7209Article, review/survey (Refereed) Epub ahead of print
Abstract [en]

Farming of eucheumatoid seaweeds is a widespread, promising activity and an important livelihood option in many tropical coastal areas as for example in East Africa, Western Indian Ocean (WIO). Compared to other types of aquaculture, seaweed farming has generally low impact on the environment. Nonetheless, there are potential direct or indirect negative effects of seaweed farming, such as introduction of alien species and changes in local environmental conditions. Although farming has been practiced in this region during several decades, the knowledge concerning the actual environmental impacts from faming non-native eucheumatoid haplotypes and consequently how to manage farming activities to mitigate those is highly limited. In this review, we provide a summary of the current scientific knowledge of potential direct and indirect negative environmental effects linked to eucheumatoid seaweed farming such as alterations of benthic macrophyte habitats and loss of native biodiversity. Furthermore, we highlight knowledge gaps that are of importance to address in the near future, e.g., large-scale ecosystem effects and farms as potential vectors of pathogens. We also provide a number of feasible management recommendations to be implemented for a continued development of environmentally sustainable seaweed farming practices in the WIO region, which includes spatial planning of farms to avoid sensitive areas and farming of native haplotypes of eucheumatoids instead of introduced specimens.

Place, publisher, year, edition, pages
2020.
Keywords [en]
Aquaculture, Coastal management, Eucheuma, Introduced species, Kappaphycus, Seaweed farming
National Category
Earth and Related Environmental Sciences Environmental Engineering
Identifiers
URN: urn:nbn:se:su:diva-179594DOI: 10.1007/s13280-020-01319-7ISI: 000510072300001PubMedID: 31997147OAI: oai:DiVA.org:su-179594DiVA, id: diva2:1416053
Available from: 2020-03-20 Created: 2020-03-20 Last updated: 2020-03-20

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Eggertsen, MariaHalling, Christina
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