Long-term stability in the circumpolar foraging range of a Southern Ocean predator between the eras of whaling and rapid climate change

• Autores: Derville, Solène; Torres, Leigh G.; Newsome, Seth Darnaby; Somes, Christopher J.; Valenzuela, Luciano Oscar; Vander Zanden, Hannah B.; Baker, C. Scott; Bérubé, Martine; Busquets-Vass, Geraldine; Carlyon, Kris; Childerhouse, Simon J.; Constantine, Rochelle; Dunshea, Glenn; Flores, Paulo A. C.; Goldsworthy, Simon D.; Graham, Brittany; Groch, Karina; Gröcke, Darren R.; Harcourt, Robert; Hindell, Mark A.; Hulva, Pavel; Jackson, Jennifer A.; Kennedy, Amy S.; Lundquist, David; Mackay, Alice I.; Neveceralova, Petra; Oliveira, Larissa; Ott, Paulo H.; Palsbøll, Per J.; Patenaude, Nathalie J.; Rowntree, Victoria; Sironi, Mariano; Vermeuelen, Els; Watson, Mandy; Zerbini, Alexandre; Carroll, Emma L.
• Año de publicación: 2023
• Idioma: inglés
• Tipo de recurso: artículo
• Materia: ENVIRONMENTAL CHANGE; EUBALAENA AUSTRALIS; ISOSCAPE; ISOTOPE ECOLOGY; SOUTHERN RIGHT WHALE
• Institución: Consejo Nacional de Investigaciones Científicas y Técnicas

Assessing environmental changes in Southern Ocean ecosystems is difficult due to its remoteness and data sparsity. Monitoring marine predators that respond rapidly to environmental variation may enable us to track anthropogenic effects on ecosystems. Yet, many long-term datasets of marine predators are incomplete because they are spatially constrained and/or track ecosystems already modified by industrial fishing and whaling in the latter half of the 20th century. Here, we assess the contemporary offshore distribution of a wide-ranging marine predator, the southern right whale (SRW, Eubalaena australis), that forages on copepods and krill from ~30°S to the Antarctic ice edge (>60°S). We analyzed carbon and nitrogen isotope values of 1,002 skin samples from six genetically distinct SRW populations using a customized assignment approach that accounts for temporal and spatial variation in the Southern Ocean phytoplankton isoscape. Over the past three decades, SRWs increased their use of mid-latitude foraging grounds in the south Atlantic and southwest (SW) Indian oceans in the late austral summer and autumn and slightly increased their use of high-latitude (>60°S) foraging grounds in the SW Pacific, coincident with observed changes in prey distribution and abundance on a circumpolar scale. Comparing foraging assignments with whaling records since the 18th century showed remarkable stability in use of mid-latitude foraging areas. We attribute this consistency across four centuries to the physical stability of ocean fronts and resulting productivity in mid-latitude ecosystems of the Southern Ocean compared with polar regions that may be more influenced by recent climate change.
Fil: Derville, Solène. State University of Oregon; Estados Unidos
Fil: Torres, Leigh G.. State University of Oregon; Estados Unidos
Fil: Newsome, Seth Darnaby. University of New Mexico; Estados Unidos
Fil: Somes, Christopher J.. Geomar-Helmholtz Centre for Ocean Research Kiel; Alemania
Fil: Valenzuela, Luciano Oscar. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil; Argentina. Universidad Nacional del Centro de la Provincia de Buenos Aires. Facultad de Ciencias Sociales. Departamento de Arqueología. Laboratorio de Ecología Evolutiva Humana (Sede Quequén); Argentina
Fil: Vander Zanden, Hannah B.. University of Florida; Estados Unidos
Fil: Baker, C. Scott. State University of Oregon; Estados Unidos
Fil: Bérubé, Martine. No especifíca;
Fil: Busquets-Vass, Geraldine. Centro de Investigacion Cientifica y de Educacion Superior de Ensenada, Unidad la Paz; México. University of New Mexico; Estados Unidos
Fil: Carlyon, Kris. No especifíca;
Fil: Childerhouse, Simon J.. No especifíca;
Fil: Constantine, Rochelle. University of Auckland; Nueva Zelanda
Fil: Dunshea, Glenn. Ecological Marine Services Pty. Ltd.; Australia
Fil: Flores, Paulo A. C.. No especifíca;
Fil: Goldsworthy, Simon D.. South Australian Research And Development Institute; Australia. University of Adelaide; Australia
Fil: Graham, Brittany. No especifíca;
Fil: Groch, Karina. No especifíca;
Fil: Gröcke, Darren R.. University of Durham; Reino Unido
Fil: Harcourt, Robert. Macquarie University; Australia
Fil: Hindell, Mark A.. Institute For Marine And Antarctic Studies; Australia
Fil: Hulva, Pavel. No especifíca;
Fil: Jackson, Jennifer A.. No especifíca;
Fil: Kennedy, Amy S.. No especifíca;
Fil: Lundquist, David. No especifíca;
Fil: Mackay, Alice I.. South Australian Research And Development Institute; Australia
Fil: Neveceralova, Petra. No especifíca;
Fil: Oliveira, Larissa. No especifíca;
Fil: Ott, Paulo H.. No especifíca;
Fil: Palsbøll, Per J.. No especifíca;
Fil: Patenaude, Nathalie J.. Collégial International Sainte-anne; Canadá
Fil: Rowntree, Victoria. University of Utah; Estados Unidos
Fil: Sironi, Mariano. Ing. Maschwitz; Argentina. Universidad Nacional de Córdoba; Argentina
Fil: Vermeuelen, Els. No especifíca;
Fil: Watson, Mandy. State Government Of Victoria, Department Of Environment, Land, Water And Planning; Australia
Fil: Zerbini, Alexandre. No especifíca;
Fil: Carroll, Emma L.. University of Auckland; Nueva Zelanda