Vitalityandage structure of arundinaceous foxtail (Alopecurus arundinaceus (Poir.)) coenopopulations in the Lena-Viluy interfluve conditions

For the first time the vitality composition and the age structure of the arundinaceous foxtail (Alopecurus arundinaceus) соеnopopulationsin the natural conditions of the Lena-Viluy interfluve are studied.3 types of vitalityare revealed: flourishing, equilibriumand depressive. The age spectrum is normal, non-complete, mostly left-handed, dominated by youngpre-generativespecies.