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Human, oceanographic and habitat drivers of central and western Pacific coral reef fish assemblages

Williams, Ivor D ; Baum, Julia K ; Heenan, Adel ; Hanson, Katharine M ; Nadon, Marc O ; Brainard, Russell E Ferse, Sebastian C. A.

PloS one, 2015-04, Vol.10 (4), p.e0120516-e0120516 [Periódico revisado por pares]

United States: Public Library of Science

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  • Título:
    Human, oceanographic and habitat drivers of central and western Pacific coral reef fish assemblages
  • Autor: Williams, Ivor D ; Baum, Julia K ; Heenan, Adel ; Hanson, Katharine M ; Nadon, Marc O ; Brainard, Russell E
  • Ferse, Sebastian C. A.
  • Assuntos: Analysis ; Animals ; Atolls ; Automobile drivers ; Biomass ; Coral Reefs ; Coral reefs and islands ; Ecological monitoring ; Fish ; Fishes ; Human factors ; Human impact ; Human influences ; Human population density ; Human populations ; Humans ; Islands ; Models, Statistical ; Motor vehicle drivers ; Oceanography ; Pacific Ocean ; Population density ; Productivity ; Reef fish ; Surveys and Questionnaires ; Underwater
  • É parte de: PloS one, 2015-04, Vol.10 (4), p.e0120516-e0120516
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
    Conceived and designed the experiments: REB MON IDW. Analyzed the data: IDW. Wrote the paper: IDW KMH JKB AH. Initiated survey program and developed survey methodology and design: REB MON IDW. Conceived the analytical approach: IDW MON JKB AH.
    Competing Interests: The authors have declared that no competing interests exist.
  • Descrição: Coral reefs around US- and US-affiliated Pacific islands and atolls span wide oceanographic gradients and levels of human impact. Here we examine the relative influence of these factors on coral reef fish biomass, using data from a consistent large-scale ecosystem monitoring program conducted by scientific divers over the course of >2,000 hours of underwater observation at 1,934 sites, across ~40 islands and atolls. Consistent with previous smaller-scale studies, our results show sharp declines in reef fish biomass at relatively low human population density, followed by more gradual declines as human population density increased further. Adjusting for other factors, the highest levels of oceanic productivity among our study locations were associated with more than double the biomass of reef fishes (including ~4 times the biomass of planktivores and piscivores) compared to islands with lowest oceanic productivity. Our results emphasize that coral reef areas do not all have equal ability to sustain large reef fish stocks, and that what is natural varies significantly amongst locations. Comparisons of biomass estimates derived from visual surveys with predicted biomass in the absence of humans indicated that total reef fish biomass was depleted by 61% to 69% at populated islands in the Mariana Archipelago; by 20% to 78% in the Main Hawaiian islands; and by 21% to 56% in American Samoa.
  • Editor: United States: Public Library of Science
  • Idioma: Inglês
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  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

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