Migration of herbaceous woodland flora into post-agricultural black alder woods planted on wet and fertile habitats in south western Poland
Migration of herbaceous woodland flora into post-agricultural black alder woods planted on wet and fertile habitats in south western Poland
复制标题
草本林地植物群迁移到波兰西南部潮湿肥沃的生境上种植的后农业黑桤木林中
作者：
A. Orczewska
由于农业后的黑杨树林一直不是森林恢复研究的对象，所以研究的目的是调查林地植物对其草本层的定居过程。研究了51种森林植物在中富营养林交界处荒废草甸上赤杨林草本层的迁移速率。计算出的平均迁移率分别为：典型湿润的梧桐林1.20-1.60亿米/年−1，橡树-角叉林1.17亿-1.63百万米/年−1，以及桦木0.79-1.26亿米/年−1，超过了在肥沃程度较低、干旱的地点进行的研究报告的结果。尽管许多物种的迁移率超过2或3米，但仍有一批迁徙缓慢的物种，主要是古林地指标。物种迁徙模式要么符合基于孤立个体建立的模型，要么符合波前模型。现代森林的树龄和草本层中存在的二种荨麻是解释农业后黑杨树林物种组成的主要因素。
Because post-agricultural black alder woods have not been the subject of studies on forest recovery, the aim of the research was to investigate the process of colonization of their herb layer by woodland flora. Migration rates of 51 forest plant species in the herb layer of alder woods planted on abandoned meadows, bordering meso- and eutrophic forests, were studied. Mean migration rates calculated for typical wet alderwoods reached 1.20–1.60 m yr−1, for oak-hornbeam forests 1.17–1.63 m yr−1, and for alder-ash carrs 0.79–1.26 m yr−1, exceeding those reported in studies conducted in less fertile, drier sites. Although migration rates for many species exceeded 2 or 3 m, there was a group of slow colonizing species, mainly ancient woodland indicators. Species migration patterns fitted either the model based on the establishment of isolated individuals, or the model of a wave front. The age of the recent forests and the presence of Urtica dioica in their herb layer are the main factors explaining the species composition in post-agricultural black alder woods.