Strong sea surface cooling in the eastern equatorial Pacific and implications for Galápagos Penguin conservation
Karnauskas, Kristopher B.
Brown, Christopher W.
MetadataShow full item record
The Galápagos is a flourishing yet fragile ecosystem whose health is particularly sensitive to regional and global climate variations. The distribution of several species, including the Galápagos Penguin, is intimately tied to upwelling of cold, nutrient-rich water along the western shores of the archipelago. Here we show, using reliable, high-resolution sea surface temperature observations, that the Galápagos cold pool has been intensifying and expanding northward since 1982. The linear cooling trend of 0.8°C/33 yr is likely the result of long-term changes in equatorial ocean circulation previously identified. Moreover, the northward expansion of the cold pool is dynamically consistent with a slackening of the cross-equatorial component of the regional trade winds—leading to an equatorward shift of the mean position of the Equatorial Undercurrent. The implied change in strength and distribution of upwelling has important implications for ongoing and future conservation measures in the Galápagos.
Author Posting. © American Geophysical Union, 2015. This article is posted here by permission of American Geophysical Union for personal use, not for redistribution. The definitive version was published in Geophysical Research Letters 42 (2015): 6432–6437, doi:10.1002/2015GL064456.
Showing items related by title, author, creator and subject.
Conservation biology and traditional ecological knowledge : integrating academic disciplines for better conservation practice Drew, Joshua A.; Henne, Adam P. (The Resilience Alliance, 2006)Conservation biology and environmental anthropology are disciplines that are both concerned with the identification and preservation of diversity, in one case biological and in the other cultural. Both conservation biology ...
Antarctic penguin response to habitat change as Earth's troposphere reaches 2°C above preindustrial levels Ainley, David G.; Russell, Joellen; Jenouvrier, Stephanie; Woehler, Eric; Lyver, Philip O'B.; Fraser, William R.; Kooyman, Gerald L. (Ecological Society of America, 2010-02)We assess the response of pack ice penguins, Emperor (Aptenodytes forsteri) and Adélie (Pygoscelis adeliae), to habitat variability and, then, by modeling habitat alterations, the qualitative changes to their populations, ...
Carbon and nitrogen isotope fractionation of amino acids in an avian marine predator, the gentoo penguin (Pygoscelis papua) McMahon, Kelton W.; Polito, Michael J.; Abel, Stephanie; McCarthy, Matthew D.; Thorrold, Simon R. (John Wiley & Sons, 2015-02-25)Compound-specific stable isotope analysis (CSIA) of amino acids (AA) has rapidly become a powerful tool in studies of food web architecture, resource use, and biogeochemical cycling. However, applications to avian ecology ...