Sporormiella fungal spores, a palynological means of detecting herbivore density
Sporormiella fungal spores, a palynological means of detecting herbivore density
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DOI：
10.1016/j.palaeo.2005.11.028
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发表时间：
2006-07-21
影响因子：
3
通讯作者：
Shafer, David S.
中科院分区：
文献类型：
--
作者：
Davis, Owen K.;Shafer, David S.
在历史时期，粪便真菌Sporormiella的孢子在美国西部牲畜丰富的湖泊和洞穴沉积物中丰富。在牧场和池塘中，孢子虫孢子有时超过陆地花粉总量的50%，在牧区的湖泊和沼泽中，孢子菌的孢子量通常可达4%。孢子虫孢子在中全新世沉积记录中比较少见，但在更新世湖泊沉积物样品中孢子量可达2-4%。孢子虫孢子直接与灭绝的大型食草动物有关，因为它们存在于犹他州贝赞洞的猛犸象粪便中。在美国西部的几个地点，孢子丝菌的百分比在大约10,800个放射性碳年(12,900年前)之后急剧下降，标志着食草动物密度的下降，可能与北美巨型食草动物的灭绝有关。(C)2006爱思唯尔B.V.保留所有权利。
During the historic period, spores of the dung fungus Sporormiella are abundant in lake and cave sediment where livestock are plentiful in the western United States. Sporormiella spores occasionally exceed 50% of the upland pollen sum in samples from corral ponds and bed-grounds, and routinely reach 4% in lake and marsh samples in pastoral areas. Sporormiella spores are comparatively rare in mid-Holocene sedimentary records, but they reach values of 2-4% in Pleistocene samples from lake sediments. Sporormiella spores are directly linked to extinct megaherbivores by their presence in mammoth dung from Bechan Cave, Utah. In several sites in the western United States, a precipitous decline of Sporormiella percentages after ca. 10,800 radiocarbon yr B.P. (12,900 years ago) marks a decline of herbivore density, probably associated with the North American megaherbivore extinction. (c) 2006 Elsevier B.V. All rights reserved.