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Altered tropical seascapes influence patterns of fish assemblage and ecological functions in the Western Indian Ocean

Chacin, D. H. and Stallings, C.D. and Eggertsen, M and Akerlund, C. and Halling, C and Berkström, Charlotte (2020). Altered tropical seascapes influence patterns of fish assemblage and ecological functions in the Western Indian Ocean. Scientific Reports. 10 , 12479 , 1-14
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Abstract

The arrangement and composition of habitats within landscapes and fine-scale habitat characteristics influence community structure and ecological processes. These aspects can be altered by anthropogenic activities, thus influencing associated assemblages. Farming of macroalgae is a common practice in tropical settings and alters the natural composition of seascapes by introducing monoculture patches. The farmed macroalgae may also differ in palatability compared to naturally-occurring macroalgae, influencing herbivory. This study assessed how these farms may differ from natural macroalgal beds in terms of habitat heterogeneity, fish assemblages, and herbivory. We surveyed fish assemblages and deployed macroalgal assays within macroalgal beds, farms and at varying distances from these habitats near Mafia Island, Tanzania. Fish composition and herbivory differed between the habitats likely due to different macrophyte species richness, underlying hard substrate in natural macroalgal beds, and high abundance of browsers nearby the farms. Additionally, fish assemblage patterns and herbivory were not consistent across the seascapes and varied with distance from the focal habitats possibly due to the presence of other habitats. The results suggest alterations of seascapes by farming practices may have consequences on fish assemblages and the ecological functions performed, thus positioning of farms should be carefully considered in management and conservation plans.

Authors/Creators:Chacin, D. H. and Stallings, C.D. and Eggertsen, M and Akerlund, C. and Halling, C and Berkström, Charlotte
Title:Altered tropical seascapes influence patterns of fish assemblage and ecological functions in the Western Indian Ocean
Year of publishing :2020
Volume:10
Article number:12479
Number of Pages:14
Publisher:Springer Nature
ISSN:2045-2322
Language:English
Publication Type:Journal article
Article category:Scientific peer reviewed
Version:Published version
Copyright:Creative Commons: Attribution 4.0
Full Text Status:Public
Subjects:(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
(A) Swedish standard research categories 2011 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Agricultural Science
URN:NBN:urn:nbn:se:slu:epsilon-p-107052
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-107052
Additional ID:
Type of IDID
DOI10.1038/s41598-020-68904-4
ID Code:17376
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:19 Aug 2020 06:42
Metadata Last Modified:19 Aug 2020 06:42

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