Limited effects of management and ecological subsidies on the size-spectra of kelp forest fish communities

dc.contributor.authorGartenstein, Simon
dc.contributor.authorPerez-Matus, Alejandro
dc.contributor.authorHeather, Freddie J.
dc.contributor.authorGodoy, Natalio
dc.contributor.authorTorres-Canete, Felipe
dc.contributor.authorCatalan, Alexis M.
dc.contributor.authorValdivia, Nelson
dc.date.accessioned2025-01-20T16:18:29Z
dc.date.available2025-01-20T16:18:29Z
dc.date.issued2024
dc.description.abstractAnimal body size influences key ecological processes across biological hierarchies. For instance, densities (N) and community biomass (B) are allometric functions of body mass (M). Energetic equivalence predicts that density scales with body size as N proportional to M-0.75 and that biomass scales with body size as B proportional to M0.25. However, the way fish size-spectra are influenced by external processes, such as ecological subsidies (e.g. nutrients from upwelling zones) and fisheries management, is not well understood. We investigated the relationship of body size with density and biomass of reef fishes associated with subtidal kelp forests of Lessonia trabeculata that were influenced by the separate and interactive effects of management (Territorial Use Rights for Fisheries [TURF] or open access) and upwelling regimes (upwelling or non-upwelling zones). Fish densities and lengths were recorded using underwater visual censuses. Within each of 4 locations, paired TURF and open-access sites were surveyed. We surveyed 18 fish species, encompassing 1511 individuals ranging between 2 and 6639 g. We observed that fish size-spectra deviated from energetic equivalence, as N proportional to M-0.32 and B proportional to M2.2, indicating that the contribution of large-sized fishes to community density and biomass was greater than that predicted by energetic equivalence. Multi-model inference suggested that TURF and upwelling scenarios had weak effects on fish size-spectra. Results indicated that fish communities may have access to external food sources beyond local kelp forests. In addition, size-spectra may be a spatially persistent attribute of these fish communities.
dc.fuente.origenWOS
dc.identifier.doi10.3354/meps14528
dc.identifier.eissn1616-1599
dc.identifier.issn0171-8630
dc.identifier.urihttps://doi.org/10.3354/meps14528
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/90649
dc.identifier.wosidWOS:001200232200006
dc.language.isoen
dc.pagina.final147
dc.pagina.inicio135
dc.revistaMarine ecology progress series
dc.rightsacceso restringido
dc.subjectSize spectra
dc.subjectTemperate reef fish
dc.subjectUpwelling
dc.subjectTURF
dc.subjectOpen access
dc.subjectFishing areas
dc.subject.ods13 Climate Action
dc.subject.ods14 Life Below Water
dc.subject.ods15 Life on Land
dc.subject.odspa13 Acción por el clima
dc.subject.odspa14 Vida submarina
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleLimited effects of management and ecological subsidies on the size-spectra of kelp forest fish communities
dc.typeartículo
dc.volumen732
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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