Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.revpalbo.2017.08.004 |
A pollen rain-vegetation study along a 3600 m mountain-desert transect in the Irano-Turanian region; implications for the reliability of some pollen ratios as moisture indicators | |
Dehghani, Mehdi1; Djamali, Morteza2; Gandouin, Emmanuel2; Akhani, Hossein1 | |
通讯作者 | Akhani, Hossein |
来源期刊 | REVIEW OF PALAEOBOTANY AND PALYNOLOGY
![]() |
ISSN | 0034-6667 |
EISSN | 1879-0615 |
出版年 | 2017 |
卷号 | 247页码:133-148 |
英文摘要 | A set of 42 modern pollen samples has been investigated to determine the relationship between pollen percentages and vegetation composition along a 3600 m elevational mountain-desert transect in central Iran. The studied transect shows three main vegetation groups including a "high altitude zone" (embracing subnival, alpine and montane subzones), a "xerophytic desert steppe zone", and a "halophytic zone", correlated with the groups defined in Correspondence Analysis (CA) of vegetation dataset and Principal Component Analysis (PCA) of pollen dataset. The subnival subzone is characterized by high values of Asteraceae, Brassicaceae and Cyperaceae pollen, while alpine and montane subzones are characterized by the highest pollen diversity with a predominance of grass pollen along the whole transect. The halophytic zone is dominated by Chenopodiaceae pollen while xerophytic desert steppe shows a high occurrence of Artemisia pollen. The comparison of pollen percentages with the corresponding vegetation plots shows a high congruency between pollen and vegetation compositions of alpine subzone and undisturbed xerophytic desert steppe but a weak correlation between those of the subnival and montane subzones and human affected xerophytic desert steppe. In addition, pollen representation of frequently encountered or important plant taxa in the Irano-Turanian region is provided. The widely used Chenopodiaceae/Artemisia = C/A pollen ratio, as an aridity index, is shown to be unreliable in the Irano-Turanian steppes. Our results suggest that a combined graph of all four indices (C/A pollen ratio, Poaceae/Artemisia = P/A, Poaceae/Chenopodiaceae = P/C and (A + C)/P ratios) can represent the vegetation and climate relationships more accurately. In conclusion, surface pollen composition can reflect the actual vegetation zones/subzones in Irano-Turanian steppes. Together, P/A and P/C ratios are more confident to differentiate mesic from arid steppes, while C/A and (A + C)/P ratios provide a useful tool to differentiate halophytic desert vegetation developed in endorheic depressions with saline soils from xerophytic desert steppe developed in well-drained soils. (C) 2017 Elsevier B.V. All rights reserved. |
英文关键词 | Chenopodiaceae/Artemisia pollen ratio Desert steppe Iranian flora Montane steppes Pollen assemblage Vegetation |
类型 | Article |
语种 | 英语 |
国家 | Iran ; France |
收录类别 | SCI-E |
WOS记录号 | WOS:000417671300011 |
WOS关键词 | GLACIAL-INTERGLACIAL CYCLES ; CASPIAN HYRCANIAN FORESTS ; CO-INERTIA ANALYSIS ; QAIDAM BASIN ; MIDDLE-EAST ; LAKE URMIA ; RECORD ; ALBORZ ; MORPHOLOGY ; EVOLUTION |
WOS类目 | Plant Sciences ; Paleontology |
WOS研究方向 | Plant Sciences ; Paleontology |
来源机构 | French National Research Institute for Sustainable Development |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/202039 |
作者单位 | 1.Univ Tehran, Halophytes & Plants Res Lab C4, Dept Plant Sci, Sch Biol,Coll Sci, Tehran 141556455, Iran; 2.Avignon Univ, IMBE, Aix Marseille Univ, CNRS,IRD, Technopole Arbois Mediterranee,Bat Villemin,BP 80, F-13545 Aix En Provence 04, France |
推荐引用方式 GB/T 7714 | Dehghani, Mehdi,Djamali, Morteza,Gandouin, Emmanuel,et al. A pollen rain-vegetation study along a 3600 m mountain-desert transect in the Irano-Turanian region; implications for the reliability of some pollen ratios as moisture indicators[J]. French National Research Institute for Sustainable Development,2017,247:133-148. |
APA | Dehghani, Mehdi,Djamali, Morteza,Gandouin, Emmanuel,&Akhani, Hossein.(2017).A pollen rain-vegetation study along a 3600 m mountain-desert transect in the Irano-Turanian region; implications for the reliability of some pollen ratios as moisture indicators.REVIEW OF PALAEOBOTANY AND PALYNOLOGY,247,133-148. |
MLA | Dehghani, Mehdi,et al."A pollen rain-vegetation study along a 3600 m mountain-desert transect in the Irano-Turanian region; implications for the reliability of some pollen ratios as moisture indicators".REVIEW OF PALAEOBOTANY AND PALYNOLOGY 247(2017):133-148. |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。