Last glacial vegetation of northern Eurasia
Last glacial vegetation of northern Eurasia
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DOI：
10.1016/j.quascirev.2010.05.031
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发表时间：
2010-09-01
影响因子：
4
通讯作者：
Huntley, Brian
中科院分区：
文献类型：
--
作者：
Allen, Judy R. M.;Hickler, Thomas;Huntley, Brian
为了探讨末次冰期晚期和全新世早期（42-10 ka BP）植被变化在巨型动物灭绝中的潜在作用，利用LPJ-GUESS动态植被模型模拟了北方欧亚大陆和阿拉斯加的古植被。古气候驱动数据来自模拟22个时间片使用哈德利中心统一模型。模拟的一系列植物功能类型（PFT）的年净初级生产力（aNPP）被映射为选定的时间片，并总结了所有时间片的主要地理区域。强典型相关模型的输出和花粉数据编译为同一时期和地区之间的证明。模拟aNPP值，特别是树PFT和中温草本植物PFT，末次冰期植被的结构和生产力的证据。中生草本植物的PFT aNPP在许多地区是较高的冰期比现在或在全新世早期。冰川期植被，而开放，在欧洲大部分地区基本上没有树木，因此有更高的能力，以支持大型脊椎动物食草动物种群比全新世早期植被。末次盛冰期后不久，尤其是在欧亚大陆西部，中温草本植物的aNPP开始显著而迅速的下降。这可能与冰川期后期和向全新世过渡期间几种大型食草哺乳动物的灭绝有关。(c)2010爱思唯尔有限公司保留所有权利。
In order to investigate the potential role of vegetation changes in megafaunal extinctions during the later part of the last glacial stage and early Holocene (42-10 ka BP), the palaeovegetation of northern Eurasia and Alaska was simulated using the LPJ-GUESS dynamic vegetation model. Palaeoclimatic driving data were derived from simulations made for 22 time slices using the Hadley Centre Unified Model. Modelled annual net primary productivity (aNPP) of a series of plant functional types (PFTs) is mapped for selected time slices and summarised for major geographical regions for all time slices. Strong canonical correlations are demonstrated between model outputs and pollen data compiled for the same period and region. Simulated aNPP values, especially for tree PFTs and for a mesophilous herb PFT, provide evidence of the structure and productivity of last glacial vegetation. The mesophilous herb PFT aNPP is higher in many areas during the glacial than at present or during the early Holocene. Glacial stage vegetation, whilst open and largely treeless in much of Europe, thus had a higher capacity to support large vertebrate herbivore populations than did early Holocene vegetation. A marked and rapid decrease in aNPP of mesophilous herbs began shortly after the Last Glacial Maximum, especially in western Eurasia. This is likely implicated in extinction of several large herbivorous mammals during the latter part of the glacial stage and the transition to the Holocene. (c) 2010 Elsevier Ltd. All rights reserved.