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The demographic decline of a sea lion population followed multi-decadal sea surface warming.
Adame, Karen; Elorriaga-Verplancken, Fernando R; Beier, Emilio; Acevedo-Whitehouse, Karina; Pardo, Mario A.
Afiliação
  • Adame K; Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Unidad La Paz, Laboratorio de Macroecología Marina, 23050, La Paz, Baja California Sur, Mexico.
  • Elorriaga-Verplancken FR; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096, La Paz, Baja California Sur, Mexico.
  • Beier E; Instituto Politécnico Nacional, Centro Interdisciplinario de Ciencias Marinas, 23096, La Paz, Baja California Sur, Mexico.
  • Acevedo-Whitehouse K; Centro de Investigación Científica y de Educación Superior de Ensenada (CICESE), Unidad La Paz, Laboratorio de Macroecología Marina, 23050, La Paz, Baja California Sur, Mexico.
  • Pardo MA; Autonomous University of Queretaro, School of Natural Sciences, Unit for Basic and Applied Microbiology, 76230, Queretaro, Mexico.
Sci Rep ; 10(1): 10499, 2020 06 26.
Article em En | MEDLINE | ID: mdl-32591624
The population growth of top predators depends largely on environmental conditions suitable for aggregating sufficient and high-quality prey. We reconstructed numerically the size of a resident population of California sea lions in the Gulf of California during 1978-2019 and its relation with multi-decadal sea surface temperature anomalies. This is the first multi-decadal examination of the sea surface temperature of the Gulf of California and of one of its major predators. A three-decade sustained warming explained the population's trend accounting for 92% of the variance, including a 65% decline between 1991 and 2019. Long-term warming conditions started in the late 80s, followed by the population's decline from 43,834 animals (range 34,080-58,274) in 1991 to only 15,291 (range 11,861-20,316) in 2019. The models suggested a century-scale optimum sea surface habitat occurring in mildly temperate waters, from 0.18 to 0.39 °C above the 100-year mean. The mechanistic links of this relation are still untested, but apparent diversification of pelagic fish catches suggests a reduction of high quality prey. We propose this population should be considered vulnerable to any disturbance that could add to the negative effects of the current warm sea surface conditions in the Gulf of California.
Assuntos

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Leões-Marinhos Limite: Animals Idioma: En Revista: Sci Rep Ano de publicação: 2020 Tipo de documento: Article País de afiliação: México País de publicação: Reino Unido

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Leões-Marinhos Limite: Animals Idioma: En Revista: Sci Rep Ano de publicação: 2020 Tipo de documento: Article País de afiliação: México País de publicação: Reino Unido