title: Природные и техногенные радионуклиды в экосистеме солёного озера Кояшское (юго-восточный Крым)
abstract: Concentrations and vertical distribution of natural (238U, 232Th, 226Ra, 210Pb, 40K) and anthropogenic (137Cs) radionuclides in the bottom sediments of the salt lake Koyashskoe located in the Opuk Nature Reserve (Kerch Peninsula, southeastern Crimea) have been studied. Natural radionuclides are the main contributors to the total radioactivity of the lake sediments, while the level of their pollution with caesium-137 is 2-3 times lower than in the coastal zone of the Black Sea. High concentration