Unusual mid-Holocene abundance of Ulmus in western Ireland - human impact in the absence of a pathogen?

Henry Lamb; Adrian Thompson

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Unusual mid-Holocene abundance of Ulmus in western Ireland - human impact in the absence of a pathogen?

机译：西爱尔兰Ulmus的全新世中全新世丰度-在没有病原体的情况下对人类的影响？

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A Holocene pollen record from Co. Clare, western Ireland, shows unusually high Ulmus pollen frequencies until about 2500 cal. BP, interrupted by four brief episodes of reduced Ulmus pollen between 6000 and 3000 cal. BP. Localized anthropogenic disturbance of the vegetation during this interval is inferred from higher magnetic susceptibility of the sediments, indicating soil erosion, and from increased Poaceae and Plantago pollen. The continued abundance of elm at several sites in Ireland, despite human impact, suggests that disease was a less significant factor in the reduction of Irish elm populations than elsewhere in northwestern Europe. It may be that the pathogen, its dispersal agent, or susceptible elm ecotypes were locally absent near the western range margin of elm, reinforcing the argument that the combined effects of human exploitation and a pathogen were necessary to cause the permanent elm decline at 6000 cal. BP in most of northwestern Europe.

机译：来自爱尔兰西部克莱尔（Co. Clare）的全新世花粉记录显示，直到2500 cal之前，榆树花粉的频率异常高。 BP，被6000到3000 cal之间的四个短时Ulmus花粉减少短暂中断。 BP。在此间隔内，由于沉积物的磁化率较高（表明土壤受到侵蚀）以及禾本科和车前草花粉的增加，可以推断出局部的人为干扰。尽管受到人类的影响，爱尔兰几个地方的榆树数量仍在继续增加，这表明与西北欧洲其他地区相比，疾病对减少爱尔兰榆树种群的影响较小。可能是在榆木的西部范围边缘附近局部缺乏病原体，其传播媒介或易感的榆树生态型，这进一步说明了人类剥削和病原体的综合作用对于引起永久性榆树在6000 cal下降是必需的。。 BP在西北欧大部分地区。

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《The holocene》 |2005年第3期|p.447-452|共6页
作者
Henry Lamb; Adrian Thompson;
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作者单位

Institute of Geography and Earth Sciences, University of Wales, Aberystwyth, Aberystwyth, Ceredigion SY23 3DB, UK;

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原文格式 PDF
正文语种 eng
中图分类天文学、地球科学;
关键词
ulmus; elm decline; pollen; ireland; late holocene;

机译：榆;榆树衰弱;花粉;爱尔兰;晚全新世;

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7. Theses Abstracts. Melvin Baker, "The Government of St. John's, Newfoundland, 1800-1921." Ph.D. Thesis, Department of History, University of Western Ontario, 1980 G. Lavigne, « La formation d’un quartier ethnique : les portugais à Montréal. » Thèse de Ph.D., Faculté d’Aménagement, Université de Montréal, 1979 Jean Query, « Montréal sous l’occupation américaine, 1774-1776 : répercussions socio-économiques. » Thèse de M.A., Département d’histoire, Université de Montréal, 1978 T.R. Bird, "Cultural Conflict and Crime Among Irish Immigrants in Hamilton, Ontario in 1891." M.A. Thesis, Department of Geography, Queen's University, 1977 C.J. Hall, "The Image of the Small Ontario Town in Fiction, 1900-1918: A Case Study in Humanistic Geography." M.A. Thesis, Department of Geography, Queen's University, 1979 T.C. Carter, "A Profile of Tenants in Central Edmonton: Their Characteristics and Housing Preferences." M.A. Thesis, Department of Georgaphy, University of Alberta, 1978 H.P. Eliasoph, "Edmonton's Impact on Surrounding Urban Centres." M.A. Thesis, Department of Geography, University of Alberta, 1978 C. Jeffares, "Dawson City, Yukon Territory: An Evaluation of Factors Contributing to its Renewed Viability." M.A. Thesis, Department of Geography, University of Alberta, 1977 [O] . 1981

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Unusual mid-Holocene abundance of Ulmus in western Ireland - human impact in the absence of a pathogen?

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