Research has proven that non-native trees have lower insect populations than native trees, which means that small birds have less access to food. According to Johan Kjellberg Jensen, a doctoral student in urban ecology at Lund University, an increase in non-native trees in cities will likely cause a further decline in biological diversity and the number of small birds in urban areas. For more information, check out “The Super Powers of Trees” on SVT Play.
Previous research has shown that non-native tree species have significantly fewer insects than native trees, resulting in a lack of food for the small birds.
– It is absolutely likely that if we increase the number of alien trees in the cities, we will see a continued decrease in both biological diversity and the amount of small birds in the cities, says Johan Kjellberg Jensen, doctoral student in urban ecology at Lund University.
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