Behavioural generalism could facilitate co-existence of tropical and temperate fishes under climate change

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dc.contributor.authorConi, E.O.C.
dc.contributor.authorBooth, D.J.
dc.contributor.authorFerreira, C.M.
dc.contributor.authorNagelkerken, I.
dc.date.issued2022
dc.descriptionFirst published: 04 October 2021
dc.description.abstractCoral-reef fishes are shifting their distributions poleward in response to human-mediated ocean warming, yet the consequences for recipient temperate fish communities remain poorly understood. Behavioural modification is often the first response of species to environmental change, but we know little about how this might shape the ongoing colonisation by tropical fishes of temperate-latitude ecosystems under climate change. In a global hotspot of ocean warming (southeast Australia), we quantified 14 behavioural traits of invading tropical and local co-occurring temperate fishes at 10 sites across a 730 km latitudinal gradient as a proxy of species behavioural niche space in different climate ranges (subtropical, warm-temperate, cold-temperate). We found that tropical fishes (4 species) modified their behavioural niches as well as increased their overall behavioural niche breadth in their novel temperate ranges where temperate species predominate, but maintained a moderate to high niche segregation with native temperate species across latitudinal range position. Temperate species (3 co-occurring species) also modified their niches, but in contrast to tropical species, experienced an increased niche breadth towards subtropical ranges. Alterations to feeding and shoaling behaviours contributed most to niche modifications in tropical and temperate species, while behaviours related to alertness and escape from potential threats contributed least. We here show that at warmer and colder range edges where community structures are being reshuffled due to climate change, behavioural generalism and niche modification are potential mechanisms adopted by tropical range extenders and native-temperate fishes to adjust to novel species interactions under climate change.
dc.description.statementofresponsibilityEricka O. C. Coni, David J. Booth, Camilo M. Ferreira, Ivan Nagelkerken
dc.identifier.citationJournal of Animal Ecology, 2022; 91(1):86-100
dc.identifier.doi10.1111/1365-2656.13599
dc.identifier.issn0021-8790
dc.identifier.issn1365-2656
dc.identifier.orcidNagelkerken, I. [0000-0003-4499-3940]
dc.identifier.urihttps://hdl.handle.net/2440/132926
dc.language.isoen
dc.publisherWiley
dc.relation.granthttp://purl.org/au-research/grants/arc/DP170101722
dc.rights© 2021 British Ecological Society
dc.source.urihttps://doi.org/10.1111/1365-2656.13599
dc.subjectbehavioural niche breadth
dc.subjectniche segregation
dc.subjectocean warming
dc.subjectrange extensions
dc.subjecttemperate ecosystems
dc.subjecttropical vagrant fishes
dc.subjecttropicalisation
dc.titleBehavioural generalism could facilitate co-existence of tropical and temperate fishes under climate change
dc.typeJournal article
pubs.publication-statusPublished

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