DOI: 10.1111/gcb.13331
论文题名: Juvenile recruitment in loggerhead sea turtles linked to decadal changes in ocean circulation
作者: Ascani F. ; Van Houtan K.S. ; Di Lorenzo E. ; Polovina J.J. ; Jones T.T.
刊名: Global Change Biology
出版年: 2016
卷: 22, 期: 11 起始页码: 3529
结束页码: 3538
语种: 英语
英文关键词: climate forcing
; decadal oscillations
; general circulation models
; Lagrangian analysis
; physical oceanography
; transition zone chlorophyll front
Scopus关键词: climate forcing
; decadal variation
; juvenile
; Lagrangian analysis
; oceanic circulation
; oceanic general circulation model
; physical oceanography
; recruitment (population dynamics)
; turtle
; Japan
; Kuroshio Current
; Pacific Ocean
; Caretta
; Caretta caretta
; Cheloniidae
; Testudines
; animal
; climate change
; Japan
; sea
; turtle
; Animals
; Climate Change
; Japan
; Oceans and Seas
; Turtles
英文摘要: Given the threats of climate change, understanding the relationship of climate with long-term population dynamics is critical for wildlife conservation. Previous studies have linked decadal climate oscillations to indices of juvenile recruitment in loggerhead sea turtles (Caretta caretta), but without a clear understanding of mechanisms. Here, we explore the underlying processes that may explain these relationships. Using the eddy-resolving Ocean General Circulation Model for the Earth Simulator, we generate hatch-year trajectories for loggerhead turtles emanating from Japan over six decades (1950–2010). We find that the proximity of the high-velocity Kuroshio Current to the primary nesting areas in southern Japan is remarkably stable and that hatchling dispersal to oceanic habitats itself does not vary on decadal timescales. However, we observe a shift in latitudes of trajectories, consistent with the Pacific Decadal Oscillation (PDO). In a negative PDO phase, the Kuroshio Extension Current (KEC) is strong and acts as a physical barrier to the northward transport of neonates. As a result, hatch-year trajectories remain mostly below 35°N in the warm, unproductive region south of the Transition Zone Chlorophyll Front (TZCF). During a positive PDO phase, however, the KEC weakens facilitating the neonates to swim north of the TZCF into cooler and more productive waters. As a result, annual cohorts from negative PDO years may face a lack of resources, whereas cohorts from positive PDO years may find sufficient resources during their pivotal first year. These model outputs indicate that the ocean circulation dynamics, combined with navigational swimming behavior, may be a key factor in the observed decadal variability of sea turtle populations. © 2016 John Wiley & Sons Ltd 资助项目: Ascani, F.
; Pacific Islands Fisheries Science Center, NOAA Fisheries, 1845 Wasp Boulevard, Building 176, United States
; 电子邮件: francois.ascani@gmail.com
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/61264
Appears in Collections: 影响、适应和脆弱性
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作者单位: Pacific Islands Fisheries Science Center, NOAA Fisheries, 1845 Wasp Boulevard, Building 176, Honolulu, HI, United States; Nicholas School of the Environment and Earth Sciences, Duke University, 450 Research Drive, Durham, NC, United States; School of Earth & Atmospheric Sciences, Georgia Institute of Technology, 311 Ferst Drive Atlanta, Atlanta, GA, United States; Monterey Bay Aquarium, 886 Cannery Row, Monterey, CA, United States
Recommended Citation:
Ascani F.,Van Houtan K.S.,Di Lorenzo E.,et al. Juvenile recruitment in loggerhead sea turtles linked to decadal changes in ocean circulation[J]. Global Change Biology,2016-01-01,22(11)