Feeding preferences of range-shifting and native herbivorous fishes in temperate ecosystems

Sara Barrientos; Salvador Zarco-Perello; Cristina Piñeiro-Corbeira; Rodolfo Barreiro; Thomas Wernberg

doi:10.1016/j.marenvres.2021.105508

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Feeding preferences of range-shifting and native herbivorous fishes in temperate ecosystems

Journal article

Peer reviewed

Feeding preferences of range-shifting and native herbivorous fishes in temperate ecosystems

Sara Barrientos, Salvador Zarco-Perello, Cristina Piñeiro-Corbeira, Rodolfo Barreiro and Thomas Wernberg

Marine environmental research, Vol.172, 105508

2021

DOI: https://doi.org/10.1016/j.marenvres.2021.105508

PMID: 34710739

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Abstract

Climate change

Ecklonia radiata

Feeding

Fish

Herbivory

Tropicalization

Western Australia

Temperate reefs are being tropicalized worldwide. In temperate Western Australia, a marine heatwave led to a regime shift from kelp (Ecklonia radiata) dominated to canopy-free reefs, together with an increase in tropical herbivorous fishes that contribute to keeping low kelp abundances and even prevent kelp reestablishment in northern regions. However, whether tropical herbivorous fishes prefer kelps over other seaweeds and/or whether this preference changes with latitude remains untested. Multiple-choice experiments (young kelp vs. other seaweeds) with tropical, subtropical and temperate herbivorous fishes show shifting species-specific preferences and fish-to-fish interference shifting with latitude (assays replicated in two regions four degrees of latitude apart). Against expectations, only the temperate Kyphosus sydneyanus preferred kelp over other seaweeds, but only in the lower latitude region. Siganus fuscescens, the most abundant tropical herbivore in both regions, preferred grazing on turf, suggesting that tropical fish might reduce kelp recruitment by consuming microscopic sporophytes in turf matrix.

Details

Title: Feeding preferences of range-shifting and native herbivorous fishes in temperate ecosystems
Authors/Creators: Sara Barrientos - Universidade da Coruña
Salvador Zarco-Perello - The University of Western Australia
Cristina Piñeiro-Corbeira - Universidade da Coruña
Rodolfo Barreiro - Universidade da Coruña
Thomas Wernberg - The University of Western Australia
Publication Details: Marine environmental research, Vol.172, 105508
Publisher: Elsevier Ltd
Identifiers: 991005592758007891
Murdoch Affiliation: Harry Butler Institute
Language: English
Resource Type: Journal article

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Collaboration types: Domestic collaboration; International collaboration
Citation topics: 3 Agriculture, Environment & Ecology; 3.2 Marine Biology; 3.2.509 Marine Algae
Web Of Science research areas: Environmental Sciences; Marine & Freshwater Biology; Toxicology
ESI research areas: Environment/Ecology