Drepanocladus turgescens(Bryophyta, Amblystegiaceae) Rediscovered in Poland

Contrasting ecological and biological characteristics of high-altitude populations of Drepanocladus turgescens in the Vanoise national park

“…The other chemical elements showed similar variability. This is consistent with previously available data, where electrical conductivity vary from 145 to over 500 µS cm −1 (Hedenäs 2002, Johnson andSteingraeber 2003), calcium from 15.4 mg l −1 to over 100 mg l -1 (Hedenäs 2002, Johnson andSteingraeber 2003) and pH from < 7 to > 8 (Schäfer-Verwimp 1985, Hedenäs 2002, Johnson and Steingraeber 2003, Krajewski 2017.…”

“…In Vanoise, D. turgescens appears to be confined to competition-free ecological microsites in banks, apparently being unable to invade channels that are permanently waterfilled or drier mounds. This high sensitivity to competition (Schröck 2013) and its pioneering behaviour (Krajewski 2017) have been previously discussed and may explain its presence on bare, dry cliffs (Schröck 2013). To some extent, the presence of the species on bare, dry cliffs is reminiscent of that described in the alvars of southern Scandinavia and the showing, for each studied station the presence or absence of sexual structures (archegonia only), the mean soil depth (cm), the percentage of cover of microtopographic elements, of each vascular plant and of each bryophyte species as well as the total percentage of cover of vascular plants and bryophytes Great Lakes region or in the limestone pavements of the UK (Hedenäs 2002, Porley 2013, Catling 2016 where the species grows massively directly on sparsely vegetated limestone outcrops.…”

“…Widespread historical maintenance of hydrologically pristine bogs and fens by extensive mowing and grazing (especially trampling pressure) has contributed significantly to small-scale disturbance of the superficial peat substrate that can favour pioneer bryophyte species (Groeneveld et al 2007, Ingerpuu and Sarv 2015, Guêné-Nanchen 2018 such as brown mosses (Udd et al 2016). The presence of the species in anthropogenic ponds (Holler 1877, Schäfer-Verwimp 1985, Krajewski 2017, may be explained by the dynamic behaviour of the species in a newly formed competition-free environment.…”

“…While D. turgescens is assessed as of least concern (LC) in Europe (Hodgetts et al 2019), its status ranges from Extinct to LC in different countries (Table 1). Although human activities may also generate favourable habitats for this species (Holler 1877, Schäfer-Verwimp 1985, Krajewski 2017, such activities seem to be at the root of its decline (Holler 1877, Köckinger and Schröck 2017). In France, at the southwestern limit of its range, it has a very restricted distribution, being recorded only in the Jura and the Alps.…”

Welcome to the Czech Republic again! Rare northern mosses Calliergon megalophyllum and Drepanocladus sordidus (Amblystegiaceae) in South Bohemia in light of their European distribution and habitat preferences

“…by zoochory of wild boars). This was observed for Pseudocalliergon turgescens and other rare, northerndistributed mosses in southern Poland, which occurred there in large sand-pits, but almost disappeared in nearby fens (Krajewski 2017).…”