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Macroalgal meadow habitats support fish and fisheries in diverse tropical seascapes

Berkström, Charlotte and Eggertsen, L. and Goodell, W. and Cordeiro, C. A. M. M. and Lucena, M. B. and Gustafsson, R. and Bandeira, S. and Jiddawi, N. and Ferreira, C. E. L. (2020). Macroalgal meadow habitats support fish and fisheries in diverse tropical seascapes. Ecography. 43 , 882-896
[Journal article]

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Abstract

Ecosystems are linked by the movement of organisms across habitat boundaries and the arrangement of habitat patches can affect species abundance and composition. In tropical seascapes many coral reef fishes settle in adjacent habitats and undergo onto-genetic habitat shifts to coral reefs as they grow. Few studies have attempted to measure at what distances from nursery habitats these fish migrations (connectivity) cease to exist and how the abundance, biomass and proportion of nursery species change on coral reefs along distance gradients away from nursery areas. The present study examines seascape spatial arrangement, including distances between habitats, and its con-sequences on connectivity within a tropical seascape in Mozambique using a seascape ecology approach. Fish and habitat surveys were undertaken in 2016/2017 and a thematic habitat map was created in ArcGIS, where cover and distances between habitat patches were calculated. Distance to mangroves and seagrasses were significant predictors for abundance and biomass of most nursery species. The proportions of nursery species were highest in the south of the archipelago, where mangroves were present and decreased with distance to nurseries (mangroves and seagrasses). Some nursery species were absent on reef sites farthest from nursery habitats, at 80 km from mangroves and at 12 km from seagrass habitats. The proportion of nursery/non-nursery snapper and parrotfish species, as well as abundance and biomass of seagrass nursery species abruptly declined at 8 km from seagrass habitats, indicating a threshold distance at which migrations may cease. Additionally, reefs isolated by large stretches of sand and deep water had very low abundances of several nursery species despite being within moderate distances from nursery habitats. This highlights the importance of considering the matrix (sand and deep water) as barriers for fish migration.

Authors/Creators:Berkström, Charlotte and Eggertsen, L. and Goodell, W. and Cordeiro, C. A. M. M. and Lucena, M. B. and Gustafsson, R. and Bandeira, S. and Jiddawi, N. and Ferreira, C. E. L.
Title:Macroalgal meadow habitats support fish and fisheries in diverse tropical seascapes
Year of publishing :2020
Volume:43
Page range:882-896
Number of Pages:15
Publisher:John Wiley & Sons Ltd, Nordic Society Oikos
ISSN:0906-7590
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 > 4 Agricultural Sciences > 401 Agricultural, Forestry and Fisheries > Fish and Aquacultural Science
(A) Swedish standard research categories 2011 > 1 Natural sciences > 106 Biological Sciences (Medical to be 3 and Agricultural to be 4) > Ecology
Keywords:coral reef, fish migrations, habitat configuration, habitat connectivity, habitat shifts, landscape ecology, ontogenetic
URN:NBN:urn:nbn:se:slu:epsilon-p-106531
Permanent URL:
http://urn.kb.se/resolve?urn=urn:nbn:se:slu:epsilon-p-106531
Additional ID:
Type of IDID
DOI10.1111/ecog.04868
ID Code:17213
Faculty:NJ - Fakulteten för naturresurser och jordbruksvetenskap
Department:(NL, NJ) > Department of Aquatic Resources
Deposited By: SLUpub Connector
Deposited On:10 Jul 2020 07:53
Metadata Last Modified:17 Aug 2020 20:58

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