: Urban forests have fewer bird species than rural: Study #IndiaNEWS #Lifestyle Washington: According to a new study conducted by Lund University in Sweden, cities have a negative impact on bird diversity.
Urban forests have fewer bird species than rural: Study #IndiaNEWS #Lifestyle
Washington: According to a new study conducted by Lund University in Sweden, cities have a negative impact on bird diversity. Even if the forest areas are of equal quality, urban woodlands have far fewer bird species than rural forests.
The researchers examined 459 natural woodlands located in or near 32 cities in southern Sweden. They counted the occurrence of different bird species, and the result is clear: in natural forests located in a city center, there are on average a quarter fewer species of forest birds compared to forests outside the city. In terms of endangered species, about half as many species were found in urban forests compared to rural forests.
The results deepen our knowledge of the impact of cities on biodiversity, says William Sidemo Holm, one of the researchers behind the study. It is already well known that urbanization is one of the main driving forces behind the loss of biodiversity, as cities spread out across the globe. What is not as well known, however, is how cities affect protected natural areas in a city.
Our study demonstrates that you cannot surround nature with urban development and believe that it will remain as it is, there is going to be a negative effect, says William Sidemo Holm, who worked on the study during his time as a doctoral student at Lund University.
The researchers wanted to specifically examine similar forests, or habitats. It is therefore not city parks that have been compared to countryside forests, emphasizes William Sidemo Holm. The study is one of the first to compare the diversity of similar habitats along a so-called urban gradient.
This way we know that the results are not driven by differences in the actual habitats, which in this scenario was a natural forest. Instead, it was the surrounding environment that was different, he says.
The fact that an urban environment has such a clear negative impact on forest bird diversity may have to do with access to food, the researchers believe. Many birds depend on food resources not only in their immediate vicinity but also in their surroundings, and in cities, there are fewer insects, for example. In addition, some species are sensitive to artificial disturbances such as noise and light, which occur more in cities.
Our results highlight the importance of taking surrounding nature into account in urban planning. Above all, it is important to avoid the expansion of cities adjacent to protected environmental areas where there may be endangered species we found that these are particularly sensitive to urban surroundings, says William Sidemo Holm.
The study also showed that urban forests can be important for bird diversity. Although a majority of the bird species were more common outside the cities, there were species that were more often found in cities, such as the hawfinch.
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