Different kelp species support unique macroinvertebrate assemblages, suggesting the potential community-wide impacts of kelp harvesting along the Humboldt Current System

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dc.contributor.authorCarbajal, Patricia
dc.contributor.authorGamarra Salazar, Alex
dc.contributor.authorMoore, Pippa J.
dc.contributor.authorPerez-Matus, Alejandro
dc.date.accessioned2025-01-20T22:01:22Z
dc.date.available2025-01-20T22:01:22Z
dc.date.issued2022
dc.description.abstractKelp forests provide habitat for myriad species yet remain poorly studied in some ecoregions, including where there is increasing interest in commercial kelp harvesting for the lucrative alginate industry. To identify indicators for monitoring the impacts of kelp harvesting, the structure and composition of macrobenthic invertebrate assemblages associated with large brown macroalgae, Eisenia cokeri, Lessonia trabeculata and Macrocystis pyrifera, from the Humboldt Current System of Peru were determined. Within kelp habitats two distinct habitats were sampled: (a) adult kelp holdfasts; and (b) the benthos adjacent to the kelp sporophyte (hereafter under-canopy rock). For each sample, organisms were identified, enumerated and weighed. Totals of 108, 102 and 113 different species were found associated with Eisenia cokeri, M. pyrifera and L. trabeculata, respectively comprising distinct assemblages associated with each kelp forest. Both habitat types (holdfasts and under-canopy rock) supported diverse, but different, macroinvertebrate assemblages, with richness, abundance and functional trophic groups in general higher in holdfasts compared with on under-canopy rock. Lastly, macroinvertebrate abundance, biomass, and species richness significantly increased with holdfast size. Results confirm that each kelp species is unique in terms of associated assemblage composition and indicate that kelp harvesting for the alginate industry may have large impacts. We suggest that these effects on associated biodiversity should be incorporated within kelp harvesting management plans. We suggest that holdfast diameter is a good ecological indicator as reductions in holdfast size across the population will indicate a decline in the diversity of macroinvertebrates that are important food sources for higher order organisms. We therefore suggest that monitoring studies include morphological measurements as well as measurement of kelp density.
dc.fuente.origenWOS
dc.identifier.doi10.1002/aqc.3745
dc.identifier.eissn1099-0755
dc.identifier.issn1052-7613
dc.identifier.urihttps://doi.org/10.1002/aqc.3745
dc.identifier.urihttps://repositorio.uc.cl/handle/11534/93817
dc.identifier.wosidWOS:000735202800001
dc.issue.numero1
dc.language.isoen
dc.pagina.final27
dc.pagina.inicio14
dc.revistaAquatic conservation-marine and freshwater ecosystems
dc.rightsacceso restringido
dc.subjectcommunity ecology
dc.subjectconservation
dc.subjectholdfast
dc.subjectmacroinvertebrates
dc.subjectPeru
dc.subjectsubtidal
dc.subject.ods14 Life Below Water
dc.subject.ods13 Climate Action
dc.subject.ods15 Life on Land
dc.subject.odspa14 Vida submarina
dc.subject.odspa13 Acción por el clima
dc.subject.odspa15 Vida de ecosistemas terrestres
dc.titleDifferent kelp species support unique macroinvertebrate assemblages, suggesting the potential community-wide impacts of kelp harvesting along the Humboldt Current System
dc.typeartículo
dc.volumen32
sipa.indexWOS
sipa.trazabilidadWOS;2025-01-12
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