The influence of spontaneously and purposefully introduced specios of plants on the ecosystems was considered. It was shown that adventization of vegetation take place on background of the destruction of the natural plants cover and the abolition of the system of the feedback. The intraspecific variety plays the important role at the domination of the adventive species in the destroye... https://www.unitedssports.shop/product-category/clothing-mens-tops-jackets/
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