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Please use this identifier to cite or link to this item: http://bura.brunel.ac.uk/handle/2438/4300

Title: Modern pollen rain–vegetation relationships along a forest–steppe transect in the Golestan National Park, NE Iran
Authors: Djamali, M
de Beaulieu, JL
Campagne, P
Akhani, H
Andrieu-Ponel, V
Ponel, P
Leroy, SAG
Keywords: Modern pollen rain-vegetation relationship
Pollen representation
Ecotone
Golestan National Park
Iran
Publication Date: 2009
Publisher: Elsevier
Citation: Review of Palaeobotany and Palynology. 153 (3-4) 272-281
Abstract: Pollen rain-vegetation relationships were studied over a forest-steppe transect in Golestan National Park, NE Iran. The surface pollen percentages were compared to the vegetation composition of the respective vegetation types in 18 sampling points using both descriptive and numerical approaches. Hyrcanian lowland forests are characterized by pollen assemblages dominated by Quercus, Carpinus betulus and low frequencies of Zelkova carpinifolia. Both Parrotia persica and Zelkova carpinifolia show a very low pollen representation in modern surface samples, an under-representation that should be taken into account in the interpretation of past vegetation records. Transitional communities between the forest and steppe including Acer monspessulanum subsp. turcomanicum, Crataegus and Paliurus scrubs, Juniperus excelsa woodlands and shrub-steppe patches are more difficult to distinguish in pollen assemblages, however, they are characterized by higher values of the dominant shrub species. The transitional vegetation communities at the immediate vicinity of the forest show also a substantial amount of grass pollen. Many insect-pollinated taxa are strongly under-represented in the pollen rain including most of the rosaceous trees and shrubs, Rhamnus, Paliurus, Acer and Berberis. Artemisia steppes are characterized by very high values of Artemisia pollen and the near absence of tree pollen.
URI: http://bura.brunel.ac.uk/handle/2438/4300
ISSN: 0034-6667
Appears in Collections:Institute for the Environment Research Papers
Environment

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