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Home NEWS Science News

The majority of reindeer grazing land is under cumulative pressures

Bioengineer by Bioengineer
September 30, 2022
in Science News
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Reindeer herding has a long history in northern Norway, Sweden and Finland. It has shaped the Fennoscandian mountain landscape, and is also seen as means to mitigate climate change effects on vegetation. Yet a new study published in Scientific Reports shows that the majority of this grazing land is exposed to cumulative pressures, threatened by the expansion of human activities towards the north.

Male reindeer walking on a national road in Jämtland, Sweden. Photo: Marianne Stoessel/Stockholm University.

Credit: Photo: Marianne Stoessel/Stockholm University

Reindeer herding has a long history in northern Norway, Sweden and Finland. It has shaped the Fennoscandian mountain landscape, and is also seen as means to mitigate climate change effects on vegetation. Yet a new study published in Scientific Reports shows that the majority of this grazing land is exposed to cumulative pressures, threatened by the expansion of human activities towards the north.

The grazing land in northern Fennoscandia is increasingly disturbed by cumulative land-use pressures. Intensive forestry, outdoor tourism, road and railway traffic, but also mining and wind farms are developing north. The newly published study has mapped and estimated the overall extent of these cumulative pressures, together with other stressors, namely predator presence and climate change.

Previous studies have mostly focused at regional scales, here the authors have used an integrated large-scale GIS analysis over three countries: Norway, Sweden and Finland. Their results suggest that about 60 per cent of the region is subjected to multiple pressures, and that 85 per cent is exposed to at least one pressure. This dramatically reduces the size and the quality of the summer grazing area. The study found that only 4 per cent of the area still remains undisturbed.

“In northern Fennoscandia, we are lucky to still have one the oldest herding systems in Europe, where reindeer can roam freely over 40 per cent of Norway, Sweden and Finland. Or at least, they used to. With the rising human presence taking place on multiple fronts, the resilience of northern pastoralism is under threat”, says Marianne Stoessel, first author of the study, and PhD student at Stockholm University.

The fact that many pressures are at play in this region is not new. The reindeer herders, the policy makers, but also the scientific community studying reindeer ecology are well aware of these problems.

“What is new is the fact that we finally managed to get an overview of these pressures over the whole area. This was not easy, as the different land-uses act at different scales and can be very dynamic, so can be the predators, and the effects of climate change on grazing”, Marianne Stoessel says.

“Grazing is a key process for maintaining plant biodiversity, even in the mountains. So it was important for us to study the extent of these cumulative pressures with having the summer pastures in mind, where grazing takes place”, says Professor Regina Lindborg, Stockholm University, co-author of the study and the coordinator of the research project.

Due to the high extent of cumulative pressures over the region and because of the climate change, this study suggests a high risk of vegetation and landscape change in the future, leading to a concentration of grazing in less disturbed areas and encroachment of trees and shrubs in disturbed ones.

The study is a part of the research project “The interacting effects of land-use and global warming on the grazing lands of northern Fennoscandia”

The study

“Mapping cumulative pressures on the grazing lands of northern Fennoscandia” is published in Scientific Reports. DOI: 10.1038/s41598-022-20095-w



Journal

Scientific Reports

DOI

10.1038/s41598-022-20095-w

Article Title

Mapping cumulative pressures on the grazing lands of northern Fennoscandia

Article Publication Date

30-Sep-2022

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