Specificity of lichen composition in temperate oak forests in the Asian Pacific|
Botanical Garden-Institute FEB RAS, Vladivostok, Russia
A study of lichen biota in temperate oak forest in Asian Pacific showed its specificity.
There is a “core” of lichen species, characteristic of pure and mixed oak forests.
This lichen biota is nemoral (144 species; 69 %) with prevalence of multiregional
species (82; 39 %), Eurasian-American (45; 22 %) and East Asian (36; 17 %).
Lichen biota of oaks also include species, characteristic of coniferous and mixed
forests of the Sikhote-Alin Range. Taxonomic diversity totals 208 species of 63
genera and 26 families. Among them, 199 species are registered on the Quercus mongolica
bark; and 88 species on the Quercus dentata bark. There are 78 lichen
species common to both oak species. Dominance of species from the order Lecanorales
is considered a characteristic feature of Holarctic floras. There have
been studies of epyphitic lichens on Quercus dentata as well. In comparison
with those met on Quercus mongolica, they have the following features: poor
taxonomical diversity, weaker diversity of lichen communities, lesser frequency
of crustaceous and fruticose growth forms, different leading taxa, prevalence of
nemoral and East Asian elements. The taxonomic and geographical analyses of
the specific structure of lichens on Q. mongolica and Q. dentata helped to identify
a gradient between lichen biota of Korean and Sikhote-Alin origin. In the southern
Khasan District, Primorsky Krai, “the cores” of characteristic species for both oak
species have much in common (species composition, their frequency, projective
cover); that proves long age of interactions between these two oak species in the
landscape of the southern Primorsky Territory. Lichen biota on Q. dentata here
are more specific in comparison with that of the Lazo District. In the foothills of Sikhote-
Alin Range, “the core” of characteristic lichen species for both oak species essentially
differs. In general, lichen biota appearance in the coastal broadleaved forests
is formed by nemoral lichen species, which are mostly widespread in the
one of broadleaved and coniferous-broadleaved forests.
© 2012 Organizing Committee