Examples of Natural Selection in Swedish Wildlife
Natural selection is a key process that helps animals adapt to their surroundings over time. In Sweden, there are many examples of how this works.
Lynx:
The Eurasian lynx is a wild cat that has adapted to its cold environment by having thicker fur. In the colder parts of Sweden, lynx with thicker fur survive better during harsh winters. Studies show that lynx in northern Sweden have fur that is 20% thicker than those in the south. This change helps them cope with the cold weather.
Alder Flycatcher:
This small bird has changed its migration habits over the years. Research shows that these birds are now migrating 15% earlier than they used to. Birds that arrive sooner at their breeding grounds have more baby birds. By migrating earlier, they can find food more easily and avoid competing with others.
Moose:
Swedish moose have grown bigger over the last 40 years. They are now 10 to 15% larger on average. Being larger helps moose survive better in winter because they have more fat stored for energy and can find food more easily.
Brown Bear:
Scientists have found that the hibernation habits of brown bears in northern Sweden have changed. About 30% of these bears are now going into hibernation earlier than before. This change likely happens because of differences in food availability and climate.
These examples show how natural selection is continuously shaping the wildlife in Sweden, helping us understand evolution better.
Examples of Natural Selection in Swedish Wildlife
Natural selection is a key process that helps animals adapt to their surroundings over time. In Sweden, there are many examples of how this works.
Lynx:
The Eurasian lynx is a wild cat that has adapted to its cold environment by having thicker fur. In the colder parts of Sweden, lynx with thicker fur survive better during harsh winters. Studies show that lynx in northern Sweden have fur that is 20% thicker than those in the south. This change helps them cope with the cold weather.
Alder Flycatcher:
This small bird has changed its migration habits over the years. Research shows that these birds are now migrating 15% earlier than they used to. Birds that arrive sooner at their breeding grounds have more baby birds. By migrating earlier, they can find food more easily and avoid competing with others.
Moose:
Swedish moose have grown bigger over the last 40 years. They are now 10 to 15% larger on average. Being larger helps moose survive better in winter because they have more fat stored for energy and can find food more easily.
Brown Bear:
Scientists have found that the hibernation habits of brown bears in northern Sweden have changed. About 30% of these bears are now going into hibernation earlier than before. This change likely happens because of differences in food availability and climate.
These examples show how natural selection is continuously shaping the wildlife in Sweden, helping us understand evolution better.