© 2019 Published under licence by IOP Publishing Ltd. The main driving force for eutrophication of water bodies are biogenic elements (compounds of nitrogen, phosphorus, carbon). These elements are the most important ...

Ontogenesis of the feral pigeons, Columba livia, was investigated in the territory of the city of Kazan. Nestlings of summer generation of one laying were shown to hatch with a diurnal interval, nestlings of spring, autumn, ...