In the course of field research, analysis previously published works and review materials stored in well-known collection funds Siberia (NS, KRAS, SSHZ), information on distribution rare adventitious native plant species Upper Yenisei basin was clarified. For first time, Arctium lappa, Armoracia sisymbrioides, Bupleurum sibiricum, Calystegia sepium, Lolium perenne, Pastinaca sativa, Polygonum s...

The analysis of plant competition experiments with variable plant density is discussed based on three published data sets. It is shown how conclusions regarding plant community dynamics from typical plant competition experiments can be extended and based on a statistical framework. The data are tested in hyperbolic competition models of decreasing complexity by a standard hierarchical statistic...

negatively affected by disturbance. meadow barley (Hordeum brachyantherum Nevski) (Hickman 1993). Purple needlegrass, blue wildrye, bluegrass and California melic are droughttolerant species that typically occupy well-drained upland sites. In contrast, creeping wildrye and meadow barley are less drought-tolerant and typically grow in the moist soils of seeps, streams and wetland margins (Walker...