Trees are promoters of forest ecosystems and tree species differ in their manners of shaping the habitat conditions on reclaimed areas. We compared effects of pure forest stands of Alnus glutinosa, Betula pendula, and Pinus sylvestris (age 20–31 years) planted on sandy, loamy sand, sandy loam, and loam soils, on chemical properties of the soil and vascular plants species composition of the herb layer. Studied properties were assessed in pairs of plots located less than 50 m apart, that differed in species composition of the canopy but were characterized by similar abiotic conditions. Forest stands of A. glutinosa were distinguished by a higher SOC content in soil (2.3% vs. 1.4% under B. pendula and P. sylvestris), higher contribution of species typical for fertile forest edges (11.4 species vs. 5.9 species on average under B. pendula and P. sylvestris) and lower number of species of the family Fabaceae (1.5 species vs. 5.2 species on average under B. pendula and P. sylvestris). Effects of P. sylvestris stands depended on soil texture. On soils with more than 15% of silt and clay, generally, no effects were observed. However, on sandy soils (more than 85% of sand) we reported lower soil reaction (pH 6.3 in aqueous solution vs. 7.3 under B. pendula) and smaller number of plant species (17 vs. 28 on average under B. pendula). Our results showed that the tree species used for afforestation significantly influenced the characteristics of the forest ecosystems, even more than abiotic conditions.

中文翻译：

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树木种类对采伐后森林地区的草本层物种构成的影响大于土壤质地

树木是森林生态系统的促进者，树木种类在形成填海区栖息地条件的方式上有所不同。我们比较了种植于沙质，壤质沙土，沙质壤土和壤土上的Al木，桦木和樟子松（20-31岁）的纯林林分对土壤化学性质和维管植物物种组成的影响药草层。在距离小于50 m的成对地块中评估研究的特性，这些地块的冠层物种组成不同，但以相似的非生物条件为特征。臀果木的林分以土壤中的SOC含量较高为特征（2.3％，而在B. pendula和B.下为1.4％）。P. sylvestris），肥沃的森林边缘典型物种的贡献较高（在B. pendula和P. sylvestris下平均为11.4种vs. 5.9种），而豆科的物种数量较少（1.5种vs. 5.2种平均）在B. pendula和P. sylvestris下）。樟子松林的影响取决于土壤质地。通常，在淤泥和粘土含量超过15％的土壤上，未观察到任何影响。但是，在沙质土壤（超过85％的沙子）上，我们报告了较低的土壤反应（水溶液中的pH值为6.3，而双歧杆菌为7.3 ），植物物种数量较少（双歧杆菌为17种，平均为28）。）。我们的结果表明，用于造林的树木物种对森林生态系统特征的影响甚至超过了非生物条件。