, Volume 153, Issue 2, pp 471–478 | Cite as

Sea turtle species vary in their susceptibility to tropical cyclones

  • David A. PikeEmail author
  • John C. Stiner
Global Change and Conservation Ecology


Severe climatic events affect all species, but there is little quantitative knowledge of how sympatric species react to such situations. We compared the reproductive seasonality of sea turtles that nest sympatrically with their vulnerability to tropical cyclones (in this study, “tropical cyclone” refers to tropical storms and hurricanes), which are increasing in severity due to changes in global climate. Storm surges significantly decreased reproductive output by lowering the number of nests that hatched and the number of hatchlings that emerged from nests, but the severity of this effect varied by species. Leatherback turtles (Dermochelys coriacea) began nesting earliest and most offspring hatched before the tropical cyclone season arrived, resulting in little negative effect. Loggerhead turtles (Caretta caretta) nested intermediately, and only nests laid late in the season were inundated with seawater during storm surges. Green turtles (Chelonia mydas) nested last, and their entire nesting season occurred during the tropical cyclone season; this resulted in a majority (79%) of green turtle nests incubating in September, when tropical cyclones are most likely to occur. Since this timing overlaps considerably with the tropical cyclone season, the developing eggs and nests are extremely vulnerable to storm surges. Increases in the severity of tropical cyclones may cause green turtle nesting success to worsen in the future. However, published literature suggests that loggerhead turtles are nesting earlier in the season and shortening their nesting seasons in response to increasing sea surface temperatures caused by global climate change. This may cause loggerhead reproductive success to improve in the future because more nests will hatch before the onset of tropical cyclones. Our data clearly indicate that sympatric species using the same resources are affected differently by tropical cyclones due to slight variations in the seasonal timing of nesting, a key life history process.


Caretta caretta Chelonia mydas Climate change Dermochelys coriacea Erosion 



We thank the National Park Service for continuous funding. We are especially grateful to S. McKenna, K. Kneifel, M. Daley, and D. Mock for their long-term commitment to sea turtle research and also thank the hundreds of Student Conservation Association participants and other volunteers that assisted with data collection. D. A. P. thanks B. Barton and K. Dyer for discussion and H. Bowcock and D. Warner for helping improve a previous draft. All work was conducted under appropriate permits issued by the Florida Fish and Wildlife Conservation Commission. During manuscript preparation D. A. P. was supported by an Australian Endeavour International Postgraduate Research Scholarship, a University of Sydney International Postgraduate Award (both to D. A. P.), and an Australian Research Council Federation Fellowship (to R. Shine).


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Copyright information

© Springer-Verlag 2007

Authors and Affiliations

  1. 1.School of Biological Sciences A08University of SydneySydneyAustralia
  2. 2.Canaveral National SeashoreTitusvilleUSA

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