Invasive Alien Plants on Decaying Wood and on Tree-Fall Disturbances in Forests in the Karkonosze MTS (Sudeten, Sw Poland)

Abstract

Three invasive anthropophytes, i.e. two vascular plants Digitalis purpurea L. and Impatiens parviflora DC. as well as one moss Orthodontium lineare Schwägr, were recorded on decaying wood and tree-fall disturbances (pit-mound-root plate complex). It contributes only 1.9% to the flora of analyzed habitats (1.1% of moss flora, 2.9% of vascular plant flora) and 3.5% of neophytes known in Sudeten Mts. They grew, sporadically and with a low frequency, on 3.5% of studied objects (on 3.1% of decaying logs and stumps and 5.6% of tree-fall disturbances) in all types of forest communities in the area of Karkonosze National Park and in the vicinity. Nowadays, invasive neophytes do not pose a threat to diversity of endangered epixylic flora. Described habitats seem to be resistant to penetration by anthropophytes.

Assemblages of native bryophytes in secondary forests with introducedQuercus rubra

“…4.4% at the BFS and 15.6% at the CFS (Supplementary material Appendix 2, Table A1). This invasive moss primarily covered bases of trees, dead wood and humus – typical substrates of this species (Herben , Söderström , Stebel et al , Staniaszek‐Kik and Żarnowiec ). It was not found on the native and alien oaks, although O. lineare sometimes occurs on the bark of oaks (Stebel et al , Fudali et al ).…”