Ash-leaved maple is one of the most aggressive alien species in most Russian regions. It was first brought to the Altai Krai in 1933. For a long time, maple had been used in the urban and village greenery planting and tree belt areas. Nowadays, it is actively settling along riverbanks, roadsides, abandoned lands, etc. Ash-leaved maple is a danger as a transformer species, preventing the pine’s reproduction in the unique natural communities – ribbon pine forests. We studied the state of the Acer negundo L. populations as a transformer species in the Barnaul ribbon pine forest. The maple population status was assessed by the transect method at the selected registration sites. The age of plants was determined by the method of T. A. Rabotnov. The first ordered branches were used for a more detailed characterization of the maple populations. The introduction of maples into the Pinus sylvestris L. communities is associated with a significant anthropogenic impact on the natural communities of the ribbon pine forest. There are pure maple communities formed in some places in the northern part of the ribbon pine forest. Throughout the Barnaul ribbon pine forest, the maple populations are normal and invasive only in the south part. The first-ordered maple branches in the southern part of the ribbon pine forest have signs of apex change associated with adverse ecological factors. The development indicators of maple trees along the entire ribbon pine forest were evaluated for the first time. The results indicate the high adaptability of maple to various ecological factors.
The article considers the results of the study of degraded bunchgrass steppes state in the Southern Kulunda area (2013-2018). It points out stages of the grassland degradation and estimates changes in the following: species composition, vertical and horizontal grass stand structure, supply of the aboveground phytomass as a result of pasture load growth.
The article considers the results of the experiment to improve the condition of the degraded bunchgrass steppes of the Southern Kulunda at different stages of pasture degradation by the conservation method (2013-2018). The change in the species composition, structure of the grass stand, supply of aboveground phytomass and its components as a result of decreasing pasture load is presented.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.