Abstract

This article addresses the phytocoenotic diversity of psammophytic grass communities in the southern part of the nonchernozem zone of Russia, where the restoration of Scots pine (Pinus sylvestris) is either ongoing or potentially possible. Community structure and composition formation trends developing under the influence of key environmental and coenotic factors have been identified. The studies were carried out in Bryansk, Kaluga, and Smolensk oblasts in 2010–2018; over 150 geobotanical releves of psammophytic grass communities have been produced. This vegetation belongs to the class Koelerio-Corynephoretea Klika 1931, which combines dry grasslands on sandy soils and rocky outcrops in the temperate and boreal zones of Europe, on islands of the North Atlantic, and in Greenland. Differences between environmental regimes of various habitats occupied by psammophytic communities have been identified. In most cases, the environmental amplitudes of syntaxonomic units vary significantly by the three key edaphic factors (moisture, soil reaction, and soil richness in mineral nitrogen) and form pretty compact environmental spaces: within each syntaxon, numerical values of the above factors, expressed in score points, normally vary within a narrow range. Regression analysis has established that the species richness of psammophytic communities depends statistically significantly only on the mineral nitrogen supply and soil moisture. Based on the statistical analysis results, the number of Pinus sylvestris plants of any age does not depend on the species richness in the community, total projective cover of the grass stand (excluding the Scots pine), separately calculated moss and lichen projective covers, and average numerical values of environmental factors identified by H. Ellenberg in the community. It is established that numbers of pine trees on study sites depend on only one factor: distance from the diaspora source determining the invasion possibility. The data on the phytocoenotic and floristic diversity of the psammophytic grass vegetation are to be incorporated into the unified database on the southern part of the nonchernozem zone of Russia to identify environmental and botanical–geographical features of this plant community type in the region.

中文翻译：

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俄罗斯Nonchernozem区南部自生砂质土壤上的先锋草植被的生态和植物特征，作为松林恢复阶段

摘要

本文讨论了俄罗斯nonchernozem地区南部沙生植物群落的植物群落多样性，该地区的苏格兰松树（Pinus sylvestris）恢复正在进行或有可能。已经确定了在关键环境和共生因素的影响下形成的群落结构和组成形成趋势。研究于2010–2018年在布良斯克州，卡卢加州和斯摩棱斯克州进行。已经生产了150个以上植物的草丛植物群落。该植被属于Koelerio-Corynephoretea类克利卡（Klika），1931年，结合了欧洲温带和北方地区，北大西洋诸岛和格陵兰岛上的沙质土壤和岩石露头上的干草地。已经确定了肺植物群落所占据的各种生境的环境制度之间的差异。在大多数情况下，语法组学单元的环境幅度会因三个关键的土壤养分因素（水分，土壤反应和土壤中的矿质氮含量）而有显着差异，并形成相当紧凑的环境空间：在每种语法中，上述因素的数值表示为在得分方面，通常会在狭窄的范围内变化。回归分析已确定，自生植物群落的物种丰富度在统计学上仅显着取决于矿物质氮的供应和土壤湿度。任何年龄的樟子松植物都不取决于群落中物种的丰富程度，草木的总射影覆盖度（不包括苏格兰松树），单独计算的苔藓和地衣的射影覆盖度以及由H确定的环境因子的平均值。 Ellenberg在社区中。已经确定，研究地点的松树数量仅取决于一个因素：与散居源的距离决定了入侵的可能性。拟南芥草植被的植物群落和植物区系多样性数据将被整合到俄罗斯nonchernozem地区南部的统一数据库中，以识别该地区该植物群落类型的环境和植物地理特征。