Filtern
Dokumenttyp
Sprache
- Englisch (4) (entfernen)
Gehört zur Bibliographie
- nein (4)
Schlagworte
- Flechten (2)
- Namib (2)
- Art (1)
- Bestimmung (1)
- Lecanora (1)
- Lecidea (1)
- Lecidella (1)
- Lecideoide Flechten (1)
- Naturschutzgebiet (1)
- Pertusaria (1)
- Provinz Westkap 〈Südafrika〉 (1)
- Schwarzwald (1)
We report the unexpected discovery of foliicolous lichen communities at several localities in the Black Forest, south-western Germany, with a total of seven truly or facultatively foliicolous taxa: Bacidina chloroticula, Fellhanera bouteillei, F. subtilis, F. viridisorediata, Fellhaneropsis myrtillicola, Gyalectidium setiferum, and Scoliciosporum curvatum. The communities are similar to those reported previously from Belgium, western Germany (Mosel valley), and Austria (Styria), apparently forming a characteristic association across central Europe (Fellhaneretum myrtillicolae SPIER & APTROOT), but are richer in species in the Black Forest than in any of the other areas studied. An identification key is provided to the species of this association in the Black Forest. Gyalectidium setiferum is new for central Europe, and Scoliciosporum curvatum is new to southern Germany.
Since these lichen communities appear to be confined to well-conserved forest and depend on favorable, warm-humid climatic conditions, their potential use as indicators of global climatic change is discussed.
Lecanora panis-erucae HERTEL & V. WIRTH, a lichen almost exclusively grazed by the larvae of an unidentified moth, is described as a new species. Lecanora substylosa (losa (losa ZAHLBR.) HERTEl & V. WIRTH comb. nova (basionym:
Lecidea substylosa NYL.), a relative of Lecanora sulphurella HEPP differing by its chemistry, hitherto known only from its type collection, is reported from numerous localities. Lecidella placodina (Lecidella placodina (Lecidella placodina NYL.) HERTEL, previously known only from its type locality in the Angolan part of the Namib Desert, is reported from other localities in
Namibia. Lecidea quartzina STIZ., judged to be a close relative of L. tragorum ZAHLBR., and hitherto known only from its type locality in the Cape Province of South Africa, is reported as new to Namibia. Lecidea sarcogynoides, also hitherto unrecorded for Namibia is reported from a number of localities.
A new species of Pertusaria from the Namib desert is described. It is characterized by a smooth, minutely fissured brown thallus with scattered, verruciform apothecia with black ostioles, grey, K+ violet spores and the absence of lichen substances. The species is related to P. melanospora, which differs in having a yellowish thallus and in containing arthothelin and 2,4- dichloronorlichexanthone.
A sketch of the lichen vegetation of the Haarwegskloof
Renosterveld Reserve near Bredasdorp (Western
Cape, South Africa) is presented. This reserve is a representative
example of renosterveld vegetation, which
replaces the better known fynbos in relatively dry regions
on more fertile, clay- and shale-based soils. Our
sketch is a first attempt to characterize the lichen biota
of a renosterveld area. The rather low number of 76 encountered
species reflects the absence of aged trees
and large rock formations and occasional bushfires.
However, the significance of the species is great because
most have very restricted distributions in southern
Africa. Among the epiphytic lichens Physciaceae and
Xanthoria-relatives prevail, while on soil and on rock
the genus Xanthoparmelia is by far the most important,
with 22 species, among them several endemics.