Long term declines in the functional diversity of sharks in the coastal oceans of eastern Australia.

Autor: Henderson CJ; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia. chender1@usc.edu.au., Gilby BL; School of Science, Technology and Engineering, University of the Sunshine Coast, Petrie, QLD, 4558, Australia., Turschwell MP; Coastal and Marine Research Centre, Australian Rivers Institute, Griffith University, Nathan, QLD, 4111, Australia., Goodridge Gaines LA; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia., Mosman JD; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia., Schlacher TA; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia., Borland HP; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia., Olds AD; School of Science, Technology and Engineering, University of the Sunshine Coast, Maroochydore, QLD, 4558, Australia.
Jazyk: angličtina
Zdroj: Communications biology [Commun Biol] 2024 May 21; Vol. 7 (1), pp. 611. Date of Electronic Publication: 2024 May 21.
DOI: 10.1038/s42003-024-06308-0
Abstrakt: Human impacts lead to widespread changes in the abundance, diversity and traits of shark assemblages, altering the functioning of coastal ecosystems. The functional consequences of shark declines are often poorly understood due to the absence of empirical data describing long-term change. We use data from the Queensland Shark Control Program in eastern Australia, which has deployed mesh nets and baited hooks across 80 beaches using standardised methodologies since 1962. We illustrate consistent declines in shark functional richness quantified using both ecological (e.g., feeding, habitat and movement) and morphological (e.g., size, morphology) traits, and this corresponds with declining ecological functioning. We demonstrate a community shift from targeted apex sharks to a greater functional richness of non-target species. Declines in apex shark functional richness and corresponding changes in non-target species may lead to an anthropogenically induced trophic cascade. We suggest that repairing diminished shark populations is crucial for the stability of coastal ecosystems.
(© 2024. The Author(s).)
Databáze: MEDLINE
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