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an endogenic development of a territorial collection of ecosystems as a result of originating and forming of new species and loss of existing ones.

changes of structure, quality of materials or objects under the influence of biological agents: usually it means loss of basic (useful) characteristics.

The location of an unexpected occurrence, failure or loss, either at a plant or along a transportation route, resulting in a release of hazardous or polluting materials.

frequent frightening off the animals, interference into their wild life (e.g., frightening the birds off from their nests that causes cooling and loss of eggs and nestlin

a huge loss of water organisms caused by a decrease (rarely – increase) of the contents of oxygen in water. It results from natural worsening of aeration of a pool or its

[Greek katastrophe - turn, revolution] - the non-equilibrium, non-steady transforming of environment, consequence of which is a loss of stability (loss of equal balance)