Today it was informed that the number of TBE cases has increased considerably in Sweden and Finland due to the climatic change and and COVID-19 pandemic, the latter of which has brought people for outdoor activities. At least in Finland one of the main causes was not mentioned. That is the dramatically increased number of white-tailed and also roe deer, both of which act as hosts to ticks, and therefore enable higher population sizes of disease causing agents.
Deer populations also cause major damage to young forests by eating hardwoods and pines, which result in direct losses to forest owners as well as directs forest owners to plant spruces, which in Central Europe have been attacked seriously by beetles, and the same has been predicted to happen also in Nordic countries if the climates continue warming as predicted.
Hunting is, however, a popular hobby in Finland, and people involved are bringing huge amounts of food to the deer in wintertime, which increases considerably their population sizes. That maximizes the amount of animals for hunting but also their effect on the spread of tick-borne diseases and forest damages.
For anyone looking from the side, it should be imperative to end the feeding of deer due to the vast problems they cause. And the common sense says, that white tailed deer should be removed from the country due to its nature as an alien invasive species. It simply is not sustainable to jeopardize ecological balance with an aggressively reproducing alien animal, put the health of lay people at risk nor damage their properties because of a hobby - no matter how enjoyable that may be.
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