Latitudinal gradients and ocean fronts strongly influence protist communities in the southern Pacific Ocean
Sturm, Daniela (University of Southampton)
Morton, Peter (National High Magnetic Field Laboratory)
Langer, Gerald (Universitat Autònoma de Barcelona. Institut de Ciència i Tecnologia Ambientals)
Balch, William M (Bigelow Laboratory for Ocean Sciences)
Wheeler, Glen (Marine Biological Association of the United Kingdom)

Fecha:	2024
Resumen:	Protist communities in the southern Pacific Ocean make a major contribution to global biogeochemical cycling, but remain understudied due to their remote location. We therefore have limited understanding of how large-scale physical gradients (e. g. temperature) and mesoscale oceanographic features (e. g. fronts) influence microeukaryote diversity in this region. We performed a high-resolution examination of protist communities along a latitudinal transect (>3000 km) at 150°W in the central southern Pacific Ocean that encompassed major frontal regions, including the subtropical front (STF), the subantarctic front (SAF), and the polar front (PF). We identified distinct microbial communities along the transect that were primarily delineated by the positions of the STF and PF. Some taxa were not constricted by these environmental boundaries and were able to span frontal regions, such as the colonial haptophyte Phaeocystis. Our findings also support the presence of a latitudinal diversity gradient (LDG) of decreasing diversity of the protist community with increasing latitude, although some individual taxa, notably the diatoms, do not adhere to this rule. Our findings show that oceanographic features and large-scale physical gradients have important impacts on marine protist communities in the southern Pacific Ocean that are likely to strongly influence their response to future environmental change.
Ayudas:	Agència de Gestió d'Ajuts Universitaris i de Recerca 2021/SGR-00640 Ministerio de Ciencia e Innovación CEX2019-000940-M
Nota:	Unidad de excelencia María de Maeztu CEX2019-000940-M
Derechos:	Aquest document està subjecte a una llicència d'ús Creative Commons. Es permet la reproducció total o parcial, la distribució, la comunicació pública de l'obra i la creació d'obres derivades, fins i tot amb finalitats comercials, sempre i quan es reconegui l'autoria de l'obra original.
Lengua:	Anglès
Documento:	Article ; recerca ; Versió publicada
Materia:	Pacific Ocean ; Protist ; Phaeocystis ; Diversity ; Fronts
Publicado en:	FEMS Microbiology Ecology, Vol. 100, Issue 12 (December 2024) . art. fiae137, ISSN 1574-6941

DOI: 10.1093/femsec/fiae137
PMID: 39528233

14 p, 2.8 MB

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