On the eve of Valentine’s Day, stories of impossible loves … between animals. The WWF tells about the loves among animals made impossible or at least more difficult by climate change. 

two polar bears playing on snow

In Antarctica, for years the emperor penguins are no longer able to find safe places to reproduce and nest, because the increase in temperature makes the ice unstable, putting at risk even the survival of newborns. In the Arctic, the reduction of the ice pack makes it increasingly difficult for the Polar Bear to hunt for food, but also find its partner during the mating season. Many species of birds have had to anticipate the period of reproduction and consequently the deposition of broods: it happened to the North American urie.

two penguin standing

There are some species that fail to reproduce successfully in case of too high temperatures. The corals, thanks to the release of millions and millions of male and female gametes, usually manage to recover even after heat waves that cause death on large portions of the barrier, but global warming is putting them under pressure, causing their disappearance in entire areas. 

The climate also affects the reproduction of many species of fish and reptiles, such as the Caretta caretta sea turtles. The sex of the offspring is determined precisely on the basis of the temperature. In case of lower temperatures, more males than females will be born, vice versa at higher temperatures. If the temperatures remain high for many years, the born females will have no males to reproduce with.