The paper presents a comprehensive numerical analysis of vegetation within the class Loiseleurio-Vaccinietea Eggler ex Schubert 1960 in Southeastern Carpathians (Romanian Carpathians), specifically the cryophilous dwarf-shrub heathlands on windswept slopes and edges and acidophilous mesophilous dwarf-shrub communities in subalpine and alpine belts. Based on a large dataset of phytosociological relevés stored in the Romanian Grasslands Database (EU-RO-008), this contribution was focused on the variability of dwarf-shrub communities, their environmental preferences, and the main ecological factors shaping their floristic composition. All relevés were analyzed using hierarchical agglomerative clustering methods to identify the main vegetation groups. Direct and indirect ordination methods were used to identify the main gradients affecting the floristic composition of individual vegetation types. The numerical analysis revealed six well-defined communities, largely corresponding to associations described in syntaxonomical literature, according to their diagnostic species: Cetrario-Loiseleurietum procumbentis Br.-Bl. et al. 1939, Cetrario nivalis-Vaccinietum gaultherioidis (Hadač 1956) Hadač ex Šibík et al. 2007, Rhododendro myrtifolii-Vaccinietum Coldea et al. 1981, Campanulo abietinae-Juniperetum nanae Simon 1966, Campanulo abietinae-Vaccinietum myrtilli (Buia et al. 1962) Boşcaiu 1971, and Bruckenthalio-Juniperetum nanae (Horvat 1938) Coldea in Coldea et al. 2015. New syntaxa were identified at lower hierarchical levels (sub-associations) and new typifications were made. The floristic composition of target species-poor communities was mainly modelled by altitudinal range (temperature) and bedrock type. In Detrended Correspondence Analysis, the plant communities were arranged based on a gradient of altitude, from those occurring in the harshest environmental conditions, at highest elevations, with a floristic composition rich in heliophile species (alliance Loiseleurio-Vaccinion Br.-Bl. in Br.-Bl. et Jenny 1926) to communities distributed at lower elevations, on sites with higher mean annual temperatures and with a floristic composition rich in shade tolerating species (alliance Juniperion nanae Br.-Bl. in Br.-Bl. et al. 1939). Relevés of alliance Rhododendrion myrtifolii de Foucault ex Theurillat et Mucina in Mucina et al. 2016 were located in an intermediate position within studied communities.

本文提出了Loiseleurio-Vaccinietea类中植被的综合数值分析Eggler ex Schubert 1960年在东南喀尔巴阡山脉（罗马尼亚喀尔巴阡山脉）居住，特别是在被风吹拂的斜坡和边缘上的低温矮矮灌木丛荒地以及亚高山和高山带的嗜酸性中温矮矮灌木丛群落。基于罗马尼亚草地数据库（EU-RO-008）中存储的大量植物社会学相关数据集，该研究的重点是矮灌木群落的变异性，其环境偏好以及决定其植物区系的主要生态因素。使用层次集聚聚类方法分析所有相关性，以识别主要植被群。使用直接和间接排序方法来确定影响各个植被类型的植物区系组成的主要梯度。数值分析显示了六个定义明确的社区，Cetrario-Loiseleurietum procumbentis Br.-Bl. 等。1939年，雪茄（Cetrario nivalis-Vaccinietum gaultherioidis）（哈达奇（Hadač），1956年）。2007，桃金娘杜鹃花-痘苗等。1981年，Campanulo abietinae-Juniperetum nanae Simon 1966年，Campanulo abietinae-Vaccinietum myrtilli（Buia等人，1962年）Boşcaiu1971年和Bruckenthalio-Juniperetum nanae（Horvat 1938）Coldea等人的Coldea。2015年。在较低的层次级别（子关联）上确定了新语法，并进行了新的类型化表示。目标物种贫乏群落的植物区系组成主要由海拔范围（温度）和基岩类型模拟。在“去趋势对应分析”中，植物群落是根据海拔梯度排列的，该海拔梯度是在最恶劣的环境条件下，海拔最高的条件下发生的，植物区系中富含嗜盐菌物种（在Br.Al的Loiseleurio-Vaccinion Br.-Bl. （-Bl。et Jenny 1926）到分布在较低海拔，年平均气温较高且植物组成中富含耐荫物种的地方的群落（alliance Juniperion nanaeBr.-Bl. 在Br.-Bl. 等。1939）。Mucina等人的Theurillat et Mucina的Foucault Rhododendrion myrtifolii联盟的相关文献。2016年位于研究社区的中间位置。