Sea turtle
Climate change

Climate change may also cause a threat to sea turtles. Since sand temperature at nesting beaches defines the sex of a sea turtle while developing in the egg, there is concern that rising temperatures may produce too many females. However, more research is needed to understand how climate change might affect sea turtle gender distribution and what other possible threats it may pose.

Studies have shown that climate change in the world is making sea turtles gender change. The study that was in January 2018 Current Biology "Environmental Warning and Feminization of One of the Largest Sea Turtle Populations in the World", showed how baby sea turtles were being born female a lot more than being born male. Scientists took blood samples from many baby sea turtles near the Great Barrier Reef. Prior to this study, the ratio of male to female was pretty normal. There was a little more female than there was male but it was enough to keep reproduction and life cycle normal. The study showed that there was 99% more female sea turtles then male.

The temperature of the sand has a big impact on the sex of the sea turtle. This is not common with other animals but it is with sea turtles. Warmer or hot sand usually makes the sea turtle female and the cooler the sand usually makes male. Climate change has made the temperatures much hotter than they should be. The temperature of the sand gets hotter every time it is time for sea turtles to lay their eggs. With that, adaption to the sand should occur but it would take generations for them to adapt to that one temperature. It would be hard because the temperature of the sand is always changing.

The sand temperature is not the only thing that impacts sea turtles. The rise of the sea levels messes with their memory. They have an imprinted map in their memory that shows where they usually give birth and go after they do. With the rise in water levels, that map is getting messed up and is hard for them to get back to where they started. It is also taking away their beaches that they lay their eggs on. Climate change also has an impact on the number of storms and the severity of them. Storms can wipe out the sea turtles nesting ground and take out the eggs that already laid. The rising level of water is also a way for the nesting grounds to disappear. Sea turtles maps and their nesting grounds getting destroyed is harmful to them. That is because with their maps being messed up and not being able to lay eggs where they usually do makes it hard for them to find a new place to nest. They usually stick to a schedule and the messing up of a schedule messes them up.

The temperature of the ocean is also rising. This impacts their diet and what they can eat. Coral reefs are majorly impacted by the rising temperatures and a lot of sea turtles diet is coral reefs or in the coral reef. Most animals that live in coral reefs need the reefs to survive. With the reefs dying, the sea life around it also does, impacting many animals.
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