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Migratory take-off. Zalakevicius510
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AbstractThe article analyses the dependency of different migratory processes on global climate change and the bird strike prevention problems possibly related to it. Climate change has a direct impact on the spring arrival of breeding birds and their autumnal departure. Of all the migration processes and their constituent parts, migratory take-off is the most sensitive to climate change. Birds try to take-off under particularly favourable for the flight conditions. Thus, climate change is predicted to induce certain shifts in take-off periods, influence alterations in staging areas and the formation of bird accumulations therein, and eventually condition the number of to it. Climate migration waves, periods of their occurrence, migratory distances, and the characteristics of the species ’ migratory course. Migration control is based on the principle of the dynamic balance between environment, i.e. climate, and the inner endogenous programme, while global climate change affects both the endogenous programme, readiness for flight by changing migration waves, and environmental conditions. Thus, bird migration control may change only the ranges of the dynamic balance, what is essential for a practical use of migration controlling mechanisms, i.e. the structure of models and the expression of formulae. Under the impact of climate change, changes in migratory state, migratory routes, migration distances and directions, places of staging and wintering, as well as migration intensity occur. These changes have a direct influence on bird strike problem management: ways of solution, concrete measures, their effectiveness, etc.