意大利西北部利古里亚和皮埃蒙特地区花粉代表性评价

IF 2.3 Q2 GEOSCIENCES, MULTIDISCIPLINARY Quaternary Pub Date : 2023-06-09 DOI:10.3390/quat6020036
D. Attolini, Francesco Ciani, Mariangela Guido, C. Montanari
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引用次数: 0

摘要

本研究的重点是意大利西北部几种植被类型的花粉图像。在201个乔木、灌木和草本植物种群中,从苔藓虫身上采集了花粉样本,并使用植物社会学方法记录了相应的植被。由于对地中海山脉和海岸最近花粉雨的研究很少,本研究旨在为更好地解释化石花粉光谱提供新的数据和工具。花粉分析为地表光谱和植被之间的比较提供了数据。计算了每个分类单元的Davis指数、保真度、离散度以及与植被数据的关系,并进行了主成分分析。大多数植被类型都可以通过花粉光谱中占主导地位的分类群来识别,这在林地(如山毛榉林、栗子林等)中经常发生。通过花粉数据来描述灌木林和某些树木主导的植被类型(如落叶松林)更为复杂。在这方面,Davis指数对于识别花粉/植物组合、花粉代表性过高和过低以及指示植被类型的分类群特别有用。计算花粉阈值,从而可以评估植物的局部存在。总的来说,所取得的结果部分证实了之前在该地区进行的研究,极大地扩大了几个不同植物群落与数据库之间的比较,以便于未来通过EMPD共享。
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Assessment of Pollen Representation in NW Italy (Liguria and Piedmont)
This research focuses on the recent pollen image of several vegetation types in NW Italy. In 201 arboreal, shrubby, and herbaceous plant populations, pollen samples were taken from moss polsters, and the corresponding vegetation was recorded using the phytosociological method. Since studies on recent pollen rain in the Mediterranean mountains and coast are rare, this research aims to provide new data and tools to better interpret fossil pollen spectra. Pollen analysis provided data for the comparison between surface spectra and vegetation. Davis indices, fidelity, dispersion, and the relation with vegetation data were calculated for each taxon, and PCA was carried out. Most vegetation types are identifiable through the taxa dominating the pollen spectra, as frequently happens in woodlands (e.g., beech woods, chestnut woods, etc.). Characterizing shrubland and certain tree-dominated vegetation types (e.g., Larix forests) through pollen data is more complex. In this regard, Davis indices are particularly useful for identifying pollen/plant association, over- and underrepresentation of pollen, and taxa indicating vegetation types. Pollen threshold values were calculated which allow the assessment of the local presence of a plant. Overall, the achieved results partially confirm those of previous research carried out in the region, greatly expanding the comparisons between several different plant communities and the database in view of future sharing through the EMPD.
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来源期刊
Quaternary
Quaternary GEOSCIENCES, MULTIDISCIPLINARY-
CiteScore
3.30
自引率
4.30%
发文量
44
审稿时长
11 weeks
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