Deakin University
Browse

File(s) under permanent embargo

Effects of rising temperature on the viability of an important sea turtle rookery

journal contribution
posted on 2014-06-01, 00:00 authored by J-O Laloë, J Cozens, B Renom, A Taxonera, Graeme HaysGraeme Hays
A warming world poses challenges for species with temperature-dependent sex determination, including sea turtles, for which warmer incubation temperatures produce female hatchlings. We combined in situ sand temperature measurements with air temperature records since 1850 and predicted warming scenarios from the Intergovernmental Panel on Climate Change to derive 250-year time series of incubation temperatures, hatchling sex ratios, and operational sex ratios for one of the largest sea turtles rookeries globally (Cape Verde Islands, Atlantic). We estimate that light-coloured beaches currently produce 70.10% females whereas dark-coloured beaches produce 93.46% females. Despite increasingly female skewed sex ratios, entire feminization of this population is not imminent. Rising temperatures increase the number of breeding females and hence the natural rate of population growth. Predicting climate warming impacts across hatchlings, male-female breeding ratios and nesting numbers provides a holistic approach to assessing the conservation concerns for sea turtles in a warming world. © 2014 Macmillan Publishers Limited.

History

Journal

Nature Climate Change

Volume

4

Pagination

513-518

Location

London, United Kingdom

ISSN

1758-678X

eISSN

1758-6798

Language

eng

Publication classification

C Journal article, C1 Refereed article in a scholarly journal

Copyright notice

2014, Nature Publishing Group

Issue

6

Publisher

Nature Publishing Group