Climate Influence on Animal Distribution in Finland Studied

Researchers at the University of Helsinki have been trying to understand what drives the distribution and abundance of animal species in Finland. To do this, they investigated whether climate or habitat-related factors are more important for determining where different species can be found.

Their study involved analyzing data on 503 terrestrial animal species that were observed over a period of 20 years across all of Finland's diverse climatic zones. The researchers used advanced statistical methods to examine the habits and habitats of these animals, which included butterflies, birds, small mammals, large mammals, and moths.

According to Emy Guilbault, lead author of the study published in Nature Communications, habitat composition turned out to be a more significant factor than climate in determining the occurrence and abundance of most animal groups. This finding highlights the importance of land-use planning for preserving biodiversity.

The researchers' conclusions are based on over 3 million observations collected during their study, which suggests that understanding and managing habitats may be key to mitigating biodiversity loss in Finland.

The study's findings suggest that when considering biodiversity variation across large geographical areas, such as southern and northern Finland, climate is a more significant factor than habitats.

However, this pattern changes when examining local and regional biodiversity patterns. In these contexts, the importance of habitats becomes more pronounced, with different species communities being found in forested areas compared to agricultural environments or wetlands.

The researchers also explored how functional traits of species influence their occurrence and abundance. They discovered that characteristics such as body size, reproductive cycle rate, and degree of specialization can impact the extent to which climate and habitat determine a species' presence.

In nearly all taxonomic groups studied, species with slower reproductive cycles were found to be more sensitive to climatic conditions than those with faster reproductive rates. This suggests that species with slower life cycles are often more vulnerable to environmental changes.

The researchers found that for birds, butterflies, and moths, body size and degree of specialization did not play a significant role in determining whether climate or habitat quality had a greater impact on their distribution.

This finding supports the idea that biodiversity loss in Finland cannot be attributed solely to climate change. Instead, other factors such as land use may have an even more profound effect on species, particularly at local and regional levels.

According to Guilbault, the combined effects of climate and habitat degradation are significant, forcing species to adapt simultaneously to these changes. This highlights the need for a comprehensive approach that addresses both climate change and habitat protection.

The study's results suggest that conservation efforts should prioritize protecting and restoring existing habitats, as this will also help species cope with the impacts of climate change.

The study suggests that habitat quality plays a more significant role than climate change in shaping the distribution of animal species in Finland's boreal regions.

Conservation efforts may be more effective if they focus on preserving existing habitats and restoring damaged ones, as this would also help species adapt to the impacts of climate change.