Postglacial vegetation and fire history, eastern Klamath Mountains, California, USA
Postglacial vegetation and fire history, eastern Klamath Mountains, California, USA
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美国加利福尼亚州克拉马斯山脉东部的冰后植被和火灾历史
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
C. Skinner
中科院分区：
文献类型：
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作者：
J. Mohr;C. Whitlock;C. Skinner
来自加利福尼亚州布拉夫湖和火山口湖的花粉和高分辨率木炭数据表明，在过去的15500年里，气候、植被和火灾历史发生了类似的变化。布拉夫湖的花粉数据表明，这些植被介于。15 500和13 100卡。BP由亚高山公园组成，零星分布着松树和冷杉。在13 100卡之后。BP是一个相对封闭的森林OFP。蒙古冷杉、白皮松和冷杉发育，火灾发生频率低。当时推测的气候比现在更凉爽、更潮湿。在全新世早期，在温暖干燥的条件下，这两个地点都以松树和橡胶树为主。在全新世晚期，随着气候变得越来越潮湿和凉爽，冷杉树种。在这两个地点和火山口湖的铁杉重要性增加，取代了松树和栎树。这两个湖记录在火灾历史上有相似的趋势，事件频率较高。8400、4000和1000卡。BP和低值ATC。4800卡。BP。这两处遗址的火灾和植被历史表明，对全新世期间气候的大规模变化做出了类似的反应。
Pollen and high-resolution charcoal data from Bluff Lake and Crater Lake, California, indicate simi lar changes in climate, vegetation and fire history during the last 15 500 years. Pollen data at Bluff Lake suggest that the vegetation betweenc. 15 500 and 13 100 cal. BP consisted of subalpine parkland with scattered Pinus andAbies. After 13 100 cal. BP a relatively closed forest ofP. monticola,P. contorta andAbies developed, and fire-event frequency was low. The inferred climate then was cooler and wetter than present. Pinus andQuercus vaccinifolia dominated at both sites during the early Holocene, when conditions were warm and dry. As climate became wetter and cooler in the late Holocene,Abies spp. at both sites andTsuga mertensi ana at Crater Lake increased in importance, displacingPinus andQuercus. The two lake records have similar trends in fire history, with high event frequencies atc. 8400, 4000 and 1000 cal. BP and low values atc. 4800 cal. BP. The fire and vegetation history at both sites suggests a similar response to large-scale changes in climate during the Holocene.