Scopul nostru este sprijinirea şi promovarea cercetării ştiinţifice şi facilitarea comunicării între cercetătorii români din întreaga lume.
Autori: Tanţãu, I., Feurdean, A., Beaulieu, J.L. de, Reille, M., Fãrcaş, S
Editorial: Palaeogeography, Palaeoclimatology, Palaeoecology, 309(3-4), p.281-290, 2011.
Pollen analysis supported by nine AMS 14C dates from the Poiana ªtiol peat sequence (1540 m), in the Rodnei
Mountains, Eastern Romanian Carpathians (Romania) is used to reconstruct the Holocene vegetation history in this mountain region. The results are then compared with other sequences from Romania and Eastern Europe in order to better understand the past dynamics of the main forest constituents. The vegetation record at Poiana ªtiol starts at ca. 11,000 cal yr BP, with the occurrence of rather closed woodlands composed of Betula, Pinus, Picea abies, Alnus, A. viridis, and Ulmus. Picea abies was the dominant tree species for almost the entire period. However, during the last 3000 years, P. abies forests were largely replaced by Pinus in the area.
Temperate tree taxa (Fraxinus, Quercus, Acer, Tilia, and Corylus avellana) were also common but likely at lower
elevation. C. avellana expanded around 10,300 cal yr BP and reached maximum values after 9000 cal yr BP.
Pollen of Carpinus betulus and Fagus sylvatica was already recorded around 7000 cal yr BP. However, the
spread of C. betulus occurred at ca. 6000 cal yr BP, with maximum values between 4800 cal yr BP and
3000 cal yr BP, while F. sylvatica spread from ca. 3200 cal yr BP and attained maximum values between 2000
and 200 cal yr BP. The first indications of human activities appeared around 3200 cal yr BP and intensified within the last 200 years. Comparison with other sequences from Romania and surrounding countries reveals both similarity and great differences related to the location of glacial refugia, climate change and human impact.
Cuvinte cheie: Pollen, 14C AMS, Forest dynamics, Human impact, Holocene, Rodnei Mountains, Romania