Degradation of the wetland sediment archive at Star Carr: An assessment of current palynological preservation

Degradation of the wetland sediment archive at Star Carr: An assessment of current palynological preservation
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斯塔卡尔湿地沉积物档案的退化:对当前孢粉学保护的评估

DOI:
10.1016/j.jasrep.2016.03.010
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发表时间:
2016
期刊:
影响因子:
0.9
通讯作者:
Albert B
Albert B
中科院分区:
--
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--
作者:
Albert B

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本文介绍了对星星卡尔湿地中石器时代遗址有机沉积物中花粉等微体化石保存状况的调查结果。本研究评估了降解的花粉记录在考古遗址的边缘配置文件,毗邻以前的花粉工作进行了1989年至1991年,并使用它作为比较的基准。自早期工作以来,花粉粒严重退化,上部泥炭缺乏花粉,有机剖面的下部受到严重影响。只有最底层的沉积物才能保存完好的花粉。与其他工作人员在评估星星卡尔遗址期间获得的水文和地球化学数据的比较表明,有机沉积物的排水和干燥造成的氧化,可能源于干燥泥炭的裂缝,是观察到的花粉记录严重恶化的主要原因。非花粉孢粉形(主要是真菌和藻类孢子)似乎比花粉在目前的生物地层记录中保存得更好,表面几乎没有退化,但在早期的工作中没有记录。星星卡尔遗址有机沉积物中的花粉档案现在严重受损。任何进一步的花粉工作应该立即进行,但可能是不合理的。
This paper presents the results of an investigation into the preservation status of pollen and other microfossils in the organic sediments at the wetland Mesolithic site of Star Carr. This study assesses the degradation of the pollen record in a profile at the edge of the archaeological site, adjacent to previous pollen work carried out from 1989 to 1991 and using it as a benchmark for comparison. There has been a severe degradation of pollen grains since the earlier work, with the upper peat devoid of pollen and the lower part of the organic profile badly affected. Only the very basal sediments retain well preserved pollen. Comparisons with hydrological and geo-chemical data obtained by other workers during the assessment of the Star Carr site suggest that oxidation caused by drainage and dessication of the organic sediments, perhaps originating in fissures in the drying peat, is a primary cause of the observed severe deterioration of the pollen record. Non-pollen palynomorphs (primarily fungal and algal spores) appear to be better preserved than pollen in the present bio-stratigraphic record, showing little surface degeneration, but are not recorded in the earlier work. The pollen archive in organic sediments at the Star Carr site is now badly damaged. Any further pollen work there should be undertaken urgently but is probably not justifiable.
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