The Ecology of Lobarion Pulmonariae and Parmelion Caperatae in Quercus Dominated Forests in South-West Norway

Abstract

Abstract119 investigated Quercus trunks and 67 species of lichens, 23 bryophytes and 3 non-lichenized fungi are arranged by means of the Minimum Spanning Tree analysis, resulting in four Lobarion communities and one Parmelion community. Lobarion is restricted to bark with pH > 5.0 in old forests. pH and Ca-content in the bark are strongly correlated; Ca seems to originate from Ca-uptake through the roots of the phorophyte. Within a single site the soil also seems to be responsible for the variation in the Mg-content of the bark, being correlated with Ca. The dominating source of the regionalvariationinMg, however, seems to be marine aerosols. Parmelion caperatae occurs on acid bark of young trees. The bark is, however, rich in Mg. Soluble tannins in the bark decrease with increasing age of the phorophyte, but are probably of minor significance for the epiphytic vegetation.

Does snail grazing affect growth of the old forest lichen Lobaria pulmonaria?

“…These requirements of B. perversa and H. lapicida are often fulfilled in deciduous forests with L. pulmonaria (e.g. Gauslaa 1985;Gauslaa 1995). The Picea abies forests of Nord-Trøndelag, in which the second dataset of L. pulmonaria was collected, are known to be poor or deficient in Balea perversa and Helicigona lapicida (Solhøy et al 2002).…”

Lichen bioindication of biodiversity, air quality, and climate: baseline results from monitoring in Washington, Oregon, and California.

“…Unlike the other N indicator groups, the term cyanolichen is biologically based and has no reference to specific pH or substrate preference, although this group is particularly well-known for high sensitivity to acidic deposition (i.e., Farmer et al 1991, Gauslaa 1985, Gilbert 1986, Goward and Arnesault 2000, Richardson and Cameron 2004. …”

Threatened forest lichen Lobaria pulmonaria - its past, present and future in Estonia

“…For example, it has been found on 28 tree species in Russia (Istomina, 1996), and on 17 tree species in both Finland (Hakulinen, 1964) and Estonia (Jüriado & Liira, 2009). Deciduous trees with well-buffered bark and a pH of 5 -6, such as Fraxinus excelsior and Populus tremula (James et al, 1977;Jüriado & Liira, 2009) or Quercus robur bark with pH > 5 (Gauslaa, 1985;Torim, 2009) are the most preferred host trees for L. pulmonaria.…”