A survey of modern pollen and vegetation along an altitudinal transect in southern Georgia, Caucasus region

Autor:	Antonio Sagona, Eliso Kvavadze, Giorgi J Arabuli, Genia S Avakov, Ian Thomas, Simon Connor
Rok vydání:	2004
Předmět:	Palynology Ecology Paleontology Vegetation medicine.disease_cause Detrended correspondence analysis Geography Deforestation Pollen medicine Ordination Transect Ecology Evolution Behavior and Systematics Holocene
Zdroj:	Review of Palaeobotany and Palynology. 129:229-250
ISSN:	0034-6667
DOI:	10.1016/j.revpalbo.2004.02.003
Popis:	This paper describes the pollen representation of vegetation patterns along an altitudinal transect in the South Caucasus region. Surface sediments from eight small- to medium-sized lakes and wetlands were analysed for modern pollen, and the results analysed numerically using detrended correspondence analysis (DCA) and dichotomised ordination (TWINSPAN). Pollen spectra from the semidesert region have a clear palynological signal characterised by an abundance of Chenopodiaceae. Differentiation of oak forest, upper tree-line and subalpine communities is more difficult: all are dominated by arboreal pollen (AP) types. The authors propose a number of indicator pollen types and pollen threshold values that may assist in detecting tree-line variations and deforestation events in Holocene pollen diagrams.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::1b3d2db59ff6c8bd8ccf8abadd1408e4 https://doi.org/10.1016/j.revpalbo.2004.02.003 Zobrazit plný text záznamu Full Text from ScienceDirect