scholarly journals Climate change increases the production of female hatchlings at a northern sea turtle rookery

Ecology ◽  
2016 ◽  
Vol 97 (12) ◽  
pp. 3257-3264 ◽  
Author(s):  
J. L. Reneker ◽  
S. J. Kamel
Keyword(s):  
Climate Change ◽  
Sea Turtle

scholarly journals Shading and Watering as a Tool to Mitigate the Impacts of Climate Change in Sea Turtle Nests

PLoS ONE ◽  
2015 ◽  
Vol 10 (6) ◽  
pp. e0129528 ◽  
Author(s):  
Jacob E. Hill ◽  
Frank V. Paladino ◽  
James R. Spotila ◽  
Pilar Santidrián Tomillo
Keyword(s):  
Climate Change ◽  
Sea Turtle ◽  
Impacts Of Climate Change

Sedimentological characteristics of key sea turtle rookeries: potential implications under projected climate change

2010 ◽  
Vol 61 (4) ◽  
pp. 464 ◽  
Author(s):  
M. M. P. B. Fuentes ◽  
J. L. Dawson ◽  
S. G. Smithers ◽  
M. Hamann ◽  
C. J. Limpus
Keyword(s):  
Climate Change ◽  
Sea Turtles ◽  
Sea Turtle ◽  
Ecological Impacts ◽  
Coarse Grained ◽  
Sediment Characteristics ◽  
Emergence Success ◽  
Ecological Implications ◽  
Turtle Population ◽  
Reef Islands

Sea turtles rely on reef islands for key parts of their reproductive cycle and require specific sediment characteristics to incubate their eggs and dig their nests. However, little is known about the sedimentological characteristics of sea turtle rookeries, how these sediment characteristics affect the vulnerability of rookeries to climate change, and the ecological implications of different sediment or altered sediment characteristics to sea turtles. Therefore, we described the sediment and identified the reef-building organisms of the seven most important rookeries used by the northern Great Barrier Reef (nGBR) green turtle population. We then reviewed the literature on the vulnerability of each identified reef-building organism to climate change and how various sediment characteristics ecologically affect sea turtles. Sediments from the studied rookeries are predominantly composed of well-sorted medium-grained to coarse-grained sands and are either dominated by Foraminifera, molluscs or both. Dissimilarities in the contemporary sedimentology of the rookeries suggest that each may respond differently to projected climate change. Potential ecological impacts from climate change include: (1) changes in nesting and hatchling emergence success and (2) reduction of optimal nesting habitat. Each of these factors will decrease the annual reproductive output of sea turtles and thus have significant conservation ramifications.

scholarly journals Assessing the evidence of ‘infertile’ sea turtle eggs

2020 ◽  
Vol 41 ◽  
pp. 329-338
Author(s):  
AD Phillott ◽  
MH Godfrey
Keyword(s):  
Climate Change ◽  
Incubation Period ◽  
Sea Turtle ◽  
Successful Mating ◽  
Physical Evidence ◽  
Breeding Populations ◽  
Sperm Penetration ◽  
Anthropogenic Drivers ◽  
Perivitelline Membrane ◽  
Nesting Season

There is increasing concern about feminization of sea turtle populations resulting from female-biased production of hatchlings due to climate change and selective loss of males from other anthropogenic drivers. Extreme female-biased breeding populations would reduce the likelihood of successful mating and potentially result in high rates of infertile eggs. Infertile eggs are those in which none of the events between sperm penetration of the ovum and syngamy have occurred. Distinguishing between fertile and infertile eggs is challenging, especially in field conditions, and researchers often have relied on physical evidence gathered from unhatched eggs at the end of the incubation period, which likely have experienced tissue decomposition. We argue that infertility in sea turtle eggs can be demonstrated only by the absence of holes caused by sperm penetration of the inner perivitelline membrane; sperm bound between the inner and outer perivitelline membranes; nuclei in the blastodisc; embryonic tissue or membranes in egg contents; and/or the characteristic white spot on the egg exterior. Unhatched eggs can be examined at the end of the incubation period, but we recommend that studies specifically investigating infertility examine at least 20 oviposited eggs each from clutches laid by at least 20 different turtles at the peak of the nesting season.

scholarly journals Climate change and green sea turtle sex ratio – Preventing possible extinction

2020 ◽  
Author(s):  
Jana Blechschmidt ◽  
Meike J. Wittmann ◽  
Chantal Blüml
Keyword(s):  
Climate Change ◽  
Sex Ratio ◽  
Nest Site ◽  
Sea Turtles ◽  
Chelonia Mydas ◽  
Sea Turtle ◽  
Change Scenario ◽  
Green Sea Turtles ◽  
The Face ◽  
Nest Depth

AbstractClimate change poses a threat to species with temperature-dependent sex determination. A recent study on green sea turtles (Chelonia mydas) at the northern Great Barrier Reef (GBR) showed a highly female-skewed sex ratio with almost all juvenile turtles being female. This shortage of males might eventually cause population extinction, unless rapid evolutionary rescue, migration or conservation efforts ensure a sufficient number of males. We built a stochastic individual-based model inspired by C. mydas, but potentially transferrable to other species with TSD. Nest depth, level of shade, and pivotal temperature were evolvable traits. Additionally, we considered the effect of crossbreeding between the northern and southern GBR, nest-site philopatry, and conservation efforts. Among the evolvable traits, nest depth was the most likely to rescue the population in the face of climate change, but even here the more extreme climate-change scenario led to extinction. Surprisingly, nest-site philopatry elevated extinction rates. Conservation efforts to artificially increase nest depth promoted population survival and did not preclude trait evolution. Although extra information is needed to make reliable predictions for the fate of green sea turtles, our results illustrate how evolution can shape the fate of long lived, vulnerable species in the face of climate change.Graphical Abstract

Climate change and temperature-linked hatchling mortality at a globally important sea turtle nesting site

2017 ◽  
Vol 23 (11) ◽  
pp. 4922-4931 ◽  
Author(s):  
Jacques-Olivier Laloë ◽  
Jacquie Cozens ◽  
Berta Renom ◽  
Albert Taxonera ◽  
Graeme C. Hays
Keyword(s):  
Climate Change ◽  
Sea Turtle ◽  
Nesting Site

scholarly journals Assessing climate change associated sea‐level rise impacts on sea turtle nesting beaches using drones, photogrammetry and a novel GPS system

2018 ◽  
Vol 25 (2) ◽  
pp. 753-762 ◽  
Author(s):  
Miguel R. Varela ◽  
Ana R. Patrício ◽  
Karen Anderson ◽  
Annette C. Broderick ◽  
Leon DeBell ◽  
...  
Keyword(s):  
Climate Change ◽  
Sea Level Rise ◽  
Sea Level ◽  
Sea Turtle ◽  
Gps System ◽  
Nesting Beaches ◽  
Sea Level Rise Impacts

scholarly journals Balanced primary sex ratios and resilience to climate change in a major sea turtle population

2017 ◽  
Vol 577 ◽  
pp. 189-203 ◽  
Author(s):  
AR Patrício ◽  
A Marques ◽  
C Barbosa ◽  
AC Broderick ◽  
BJ Godley ◽  
...  
Keyword(s):  
Climate Change ◽  
Sex Ratios ◽  
Sea Turtle ◽  
Turtle Population

scholarly journals A potential tool to mitigate the impacts of climate change to the caribbean leatherback sea turtle

2011 ◽  
Vol 18 (2) ◽  
pp. 401-411 ◽  
Author(s):  
Juan Patino-Martinez ◽  
Adolfo Marco ◽  
Liliana Quiñones ◽  
Lucy Hawkes
Keyword(s):  
Climate Change ◽  
Sea Turtle ◽  
Leatherback Sea Turtle ◽  
The Caribbean ◽  
Potential Tool ◽  
Impacts Of Climate Change
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