Late Holocene development of the vegetation cover of Putyatin Island (Peter the Great Bay, Sea of Japan)|
Marina LYASHCHEVSKAYA, Ilona RODNIKOVA, Alena KISELEVA & Nina PSHENICHNIKOVA
Pacific Geographical Institute FEB RAS, Vladivostok, Russia
The island offers exceptional opportunities for investigating distribution and
development of the local flora. The goal of this research is to analyze the current
state of soil-vegetation cover and to reconstruct Putyatin Island palaeovegetation.
Vascular plants and lichens were used as indicators of the current status
of vegetation. In different types of landscapes soil profiles were laid. For
reconstructing vegetation dynamics, soil samples were collected from genetic
horizons of the soil profiles for spore-pollen analysis. The contemporary vegetation
of the island comprises anthropogenically transformed forests, broadleaved
forests, shrubby associations, grassy associations of swamps, lakes
and coasts. Broad-leaved forests are represented largely by Quercus mongolica,
Tilia amurensis, Ulmus japonica, Fraxinus rhynchophylla, Betula davurica,
B. platyphylla, Acer mono, A. pseudosieboldianum, Phellodendron amurense,
Carpinus cordata, Kalopanax septemlobus. Most lichen communities consist
of Flavoparmelia caperata, Myelochroa aurulenta, Parmotrema reticulatum,
Phaeophyscia hirtuosa which are widely spread along the entire shore of
Peter the Great Bay. In the Northern part of the island, lichen communities, which
include rare lichen species Cococarpia palmicola, Anzia colpodes, Pannaria lurida,
Usnea rubicunda, are found. The lichens show evidence of oppression in
some places. The soil cover under the forest stand on Putyatin Island is represented
by brown soils. The soil profile is shallow and highly skeletal. Spore-pollen
analysis data give evidence of several stages of vegetation development in Putyatin
Island in late Holocene; all stages are connected with general regional
fluctuations of climate. The first stage witnesses wide distribution of wormwoodforb-
shrubby associations and birch forests with coniferous and broadleaved species.
The second stage represents development of coniferous-broadleaved forests.
The third one that corresponds with present-day vegetation of the island is
secondary in origin and results from anthropogenic influence. This study is supported
by RFBR grants (12-05-00017, 12-05-00202) and FEB RAS Presidium
grants (12-III-A-09-208, 12-III-B-09-200).
© 2012 Organizing Committee