Holocene records of Dendroctonus bark beetles in high elevation pine forests of Idaho and Montana, USA
Holocene records of Dendroctonus bark beetles in high elevation pine forests of Idaho and Montana, USA
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DOI：
10.1016/j.foreco.2007.10.008
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发表时间：
2008-03-20
影响因子：
3.7
通讯作者：
Munson, A. Steven
中科院分区：
文献类型：
--
作者：
Brunelle, Andrea;Rehfeldt, Gerald E.;Munson, A. Steven
在美国北方落基山脉地区的爱达荷州和蒙大拿州的两个湖泊中进行的古生态重建揭示了树皮甲虫鞘翅和头囊的存在（参见。大小蠹属，最有可能是D。ponderosae，山松甲虫）。这些大型化石出现在与1920/1930年蒙大拿州贝克湖山松甲虫爆发有关的时期，表明当甲虫种群达到流行水平时，可能会在湖泊沉积物中发现甲虫遗骸。除了世纪在贝克湖发现的甲虫遗骸外，还发现了来自约1000年的甲虫遗骸。8331、8410和8529 cal年BP。在爱达荷州的胡都湖，人们发现了大约。7954和8163 cal yr BP。这些全新世记录表明，在一段时间内，当气候迅速变化到凉爽，有效地比目前在森林中的白皮松为主的潮湿的侵扰发生。这两个湖泊记录提供了第一个初步的数据，了解长期历史的气候影响Dendroctonus树皮甲虫活动，这可能是有用的预测气候和林分条件时，山松甲虫活动发生。由爱思唯尔公司出版
Paleoecological reconstructions from two lakes in the U.S. northern Rocky Mountain region of Idaho and Montana revealed the presence of bark beetle elytra and head capsules (cf. Dendroctonus spp., most likely D. ponderosae, mountain pine beetle). Occurrence of these macrofossils during the period of time associated with the 1920/1930 A.D. mountain pine beetle outbreak at Baker Lake, Montana suggest that when beetle populations reach epidemic levels, beetle remains may be found in the lake sediments. In addition to the beetle remains found at Baker Lake during the 20th century, remains were also identified from ca. 8331, 8410, and 8529 cal yr BP. At Hoodoo Lake, Idaho remains were found at ca. 7954 and 8163 cal yr BP. These Holocene records suggest the infestations occurred during a period when climate changed rapidly to cooler and effectively wetter than present in forests dominated by whitebark pine. These two lake records provide the first preliminary data for understanding the longterm history of climatic influences on Dendroctonus bark beetle activity, which may be useful for predicting climate and stand conditions when mountain pine beetle activity occurs. Published by Elsevier B.V.