Mixed forests put to the test: animal species benefit from diversity!

Mixed forests put to the test: animal species benefit from diversity!

The coexistence of animal species in European forests is a central topic of current research. After an investigation of the Research teams from the University of Göttingen shows that mixed forests with deciduous and coniferous trees significantly improve the living conditions for various animal species. Specifically, the study shows that red squirrels, which prefer coniferous forests, and dormouse, which are more common in beech forests, can coexist in mixed forests. This indicates increased biodiversity.

As part of this study, published in the *European Journal of Wildlife Research*, 80 cameras were installed in northern Germany to observe animal life over a period of seven months. The cameras recorded 468 sightings of squirrels and 446 of dormice, supporting the interaction of these species in mixed forests. Researchers emphasize that promoting such mixed forests through forestry practices has a positive impact on local fauna.

Forests as carbon stores

A comprehensive understanding of forest ecosystems is also provided by the results of a study by TU Dresden supported, which examined the connection between tree species diversity and forest productivity. The analysis shows that mixed stands grow faster and bind more CO2. A tree diversity experiment was set up in which 80 plots were planted with native tree species in order to measure structural complexity and its influence on tree growth.

The study identified that not only species diversity, but also structural complexity is crucial for forest productivity. Structurally complex communities grew almost twice as fast as simply structured populations. These findings are highly relevant for future reforestation projects, especially in the context of climate change. Trees not only act as carbon stores, but also contribute to the stability of forests.

Mixed forests as a response to climate change

The situation in Germany is also influenced by the findings of Karlsruhe Institute of Technology (KIT) clarified. In regions like the Black Forest, firs and spruces already make up 80% of the tree population, making them vulnerable to climate-related extreme events. Experts suggest converting pure stands into mixed stands to increase forest resilience.

In a survey of 20 forestry and tourism experts, most confirmed the benefits of mixed forests in terms of biodiversity and long-term viability. Mixed forests not only offer great genetic diversity, they are also better suited to withstand climatic changes.

The comprehensive findings from these studies suggest that mixed forests are both ecologically and economically beneficial. However, in future decision-making processes, care must be taken to take location factors and the interests of all those involved into account.