Late Quaternary vegetation, climate and fire dynamics inferred from the El Tiro record in the southeastern Ecuadorian Andes
Late Quaternary vegetation, climate and fire dynamics inferred from the El Tiro record in the southeastern Ecuadorian Andes
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DOI：
10.1002/jqs.1134
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发表时间：
2008-03-01
影响因子：
2.3
通讯作者：
Behling, Hermann
中科院分区：
文献类型：
--
作者：
Niemann, Holger;Behling, Hermann
为了研究山地雨林和帕拉诺生态系统的稳定性和动态，包括这些生态系统的生物多样性、全新世和晚更新世的气候和火灾变化以及人类对厄瓜多尔安第斯山脉东南部的影响，我们提供了来自罗汉松国家公园埃尔蒂罗山口（海拔 2810m）的高分辨率花粉记录。通过花粉、孢子和木炭分析研究古环境变化，从横跨最后约 127 厘米长的核心推断出。 21000 卡路里yr BP，表明草帕拉莫是更新世晚期埃尔蒂罗山口的主要植被类型。禾本科植物富含禾本科植物、车前子和车前子，反映了寒冷和潮湿的气候条件。全新世早期，从11200卡到8900卡。 BP年，亚帕拉莫和高山雨林植被略有扩张，表明这一时期气候条件缓慢变暖。从 8900 到 3300 cal。一年前，研究地点出现了上山雨林，红花藤、罗汉松科、紫杉科和冬青科植物的增加表明了这一点。这表明该海拔地区的气候比现在温暖。现代亚帕拉莫植被自公元 3300 年开始建立。埃尔蒂罗山口 (El Tiro Pass) 的 BP。火灾可能是人为原因，在更新世晚期非常罕见，但在 800.0 cal 之后变得频繁。年血压。版权所有 (C) 2007 John Wiley & Sons, Ltd.
In order to study the stability and dynamics of mountain rainforest and paranno ecosystems, including the biodiversity of these ecosystems, the Holocene and late Pleistocene climate and fire variability, and human impact in the southeastern Ecuadorian Andes, we present a high-resolution pollen record from El Tiro Pass (2810m elevation), Podocarpus National Park. Palaeoenvironmental changes, investigated by pollen, spores and charcoal analysis, inferred from a 127cm long core spanning the last ca. 21000 cal. yr BP, indicate that grass-paramo was the main vegetation type at the El Tiro Pass during the late Pleistocene period. The grass-paramo was rich in Poaceae, Plantago rigida and Plantago australis, reflecting cold and moist climatic conditions. During the early Holocene, from 11 200 to 8900cal. yr BP, subparamo and upper mountain rainforest vegetation expanded slightly, indicating a slow warming of climatic conditions during this period. From 8900 to 3300 cal. yr BP an upper mountain rainforest developed at the study site, indicated by an increase in Hedyosmun, Podocarpaceae, Myrsine and Ilex. This suggests a warmer climate than the present day at this elevation. The modern subparamo vegetation became established since 3300 cal. yr BP at El Tiro Pass. Fires, probably anthropogenic origin, were very rare during the late Pleistocene but became frequent after 800.0 cal. yr BP. Copyright (C) 2007 John Wiley & Sons, Ltd.