An eight-year record of pollen deposition in the Pieria mountains (N. Greece) and its significance for interpreting fossil pollen assemblages
An eight-year record of pollen deposition in the Pieria mountains (N. Greece) and its significance for interpreting fossil pollen assemblages
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DOI：
10.1016/j.revpalbo.2006.04.004
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发表时间：
2006-10-01
影响因子：
1.9
通讯作者：
Athanasiadis, Nikolaos
中科院分区：
文献类型：
--
作者：
Gerasimidis, Achilles;Panajiotidis, Sampson;Athanasiadis, Nikolaos
现代花粉沉积在皮耶里亚山脉，希腊北部，监测通过6个修改Tauber陷阱（P1-P6）。陷阱放置在海拔1200米至2000米的样带上，覆盖了从樟子松和/或R nigra组成的森林到开放的亚高山矮灌木群落（主要是Juniperus communis ssp.）的一系列景观。奶奶自1996年10月起，每年都收集收集收集器中的物质。一个为期八年的系列（1996-2003年）的花粉沉积数据，表示为花粉积累率（PAR）和花粉百分比。八年平均PAR反映了每个陷阱直接集水区内的植被。在P1和P2的花粉组合，这是分别放置在树线和以上，通过具有低乔木和高灌木PAR信号这个过渡带。松树是植被的优势树种，在整个森林样带的一部分，因此，陷阱陷阱的PAR的变化定义的总树PAR的大小。其他树种，如栎属，有助于背景花粉负荷或像冷杉，已知具有相对较低的花粉生产力。虽然山毛榉的PAR很低，由于山毛榉林的位置和皮耶里亚山脉的地形之间的关系，在1998年和2001年的两个高峰是在希腊山毛榉林观察到的三年周期的桅杆。栗属花粉的发生被认为是依赖于开花时的主导风向。杜松是灌木植被的主要组成部分，特别是在树线附近和上方，所以，像松树一样，它的PAR形状的陷阱，以捕捉总灌木PAR的波动。陷阱P3和P6和两个先前分析的核心的表面样品之间的花粉值的百分比的比较显示的有用性的花粉陷阱的结果在解释的化石花粉组合所代表的植被：花粉沉积监测在不同的海拔高度是一个很好的关键跟踪过去的海拔变化的树线从化石记录。(c)2006 Elsevier B. V.保留所有权利。
Modem pollen deposition in the Pieria mountains, North Greece, is monitored by means of six modified Tauber traps (P1-P6). The traps are placed on an altitudinal transect from 1200 m to 2000 m a.s.l and cover a range of landscapes from forests composed of Pinus sylvestris and/or R nigra to open sub-alpine communities with dwarf shrubs, mostly Juniperus communis ssp. nana. Since October 1996 the contents of the traps have been collected on an annual base. An eight-year series (1996-2003) of pollen deposition data, expressed as both pollen accumulation rates (PAR) and pollen percentages, is presented. The eight year average PARs reflect the vegetation within the immediate catchment area of each trap. The pollen assemblage at sites PI and P2, which are placed at and above the treeline, respectively, signal this transitional zone through having low tree and high shrub PARs. Pine is the dominant tree species of the vegetation throughout the forested part of the transect and, as a result, trap to trap variations in its PAR define the magnitude of the total tree PAR. Other tree species, such as Quercus, contribute to the background pollen loading or, like Abies, are known to have relatively low pollen productivity. Although the PARs of Fagus are very low, due to the relationship between the location of beech forests and the topography of the Pieria mountains, two peaks in 1998 and 2001 are in keeping with the three-year cycle of mast observed in Greek beech forests. The occurrence of Castanea pollen is seen to be dependent on the dominant wind direction at the time of flowering. Juniper is the major constituent of the shrub vegetation especially near and above the treeline so, like pine, its PARs shape the trap to trap fluctuations of the total shrub PAR. A comparison of the percentage pollen values between traps P3 and P6 and the surface samples of two previously analysed cores shows the usefulness of the pollen trap results in interpreting the vegetation represented by the fossil pollen assemblages: pollen deposition monitored at different elevations is a good key for tracing past altitudinal changes in the treeline from the fossil record. (c) 2006 Elsevier B.V. All rights reserved.