权益分类	功能权益	普通用户	{{item.name}}会员
{{category.name}}	{{benefitItem.name}}

Vegetation changes during the last 400 years in norhern Yakutia, Arctic Russia: Evidence from pollen analysis and vegetation modeling

俄罗斯北极地区雅库特北部过去 400 年的植被变化：来自花粉分析和植被建模的证据

基本信息

批准号：
71883563
负责人：
Professorin Dr. Ulrike Herzschuh
金额：
--
依托单位：
Institut für Geowissenschaften
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2008
资助国家：
德国
起止时间：
2007-12-31 至 2015-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/71883563?language=en
关键词：
Vegetation changes during last 400

项目摘要

The main objective of this proposal is to explore the impacts of changes in climate on arctic vegetation, with special respect to treeline dynamics in northern Yakutia during the last 400 years, and in the future 100 years, using both vegetation proxy methods and vegetation modelling. In accordance with the originally proposed working programme for the first three month, we analyzed modern sediment samples for pollen and macrofossils (and additionally for diatom and cladocera). Obtained organism assemblages are statistically significantly related to modern vegetation and climate parameter. We have also prepared input data for driving both the BIOME4 and the LPJ vegetation model. The current vegetation patterns and historical vegetation changes were preliminarily simulated in Yakutia, which revealed basically the arctic vegetation structure and functions. In order to achieve our final aims more works are needed in terms of reconstructing vegetation changes during the past 400 years from vegetation proxy data (pollen/ diatoms/cladocera) in northern Yakutia; improving the vegetation models and linking palaeovegetation simulation, vegetation proxy results and palaeoclimate modelling together; and predicting vegetation change and assessing the regional risk for the 21st Century in the context of past changes.

这项提案的主要目的是利用植被替代方法和植被模型，探讨气候变化对北极植被的影响，特别是过去400年和未来100年雅库特北部的树线动态。根据最初提出的头三个月工作方案，我们分析了现代沉积物样品中的花粉和大型化石(另外还有硅藻和枝角类)。所获得的生物组合与现代植被和气候参数具有统计意义上的显著相关性。我们还准备了用于驱动BIOME4和LPJ植被模型的输入数据。初步模拟了雅库特地区目前的植被格局和历史植被变化，基本揭示了北极植被的结构和功能。为了实现我们的最终目标，还需要在以下方面做更多的工作：从雅库特北部的植被替代数据(花粉/硅藻/枝角类)重建过去400年的植被变化；改进植被模型，将古植被模拟、植被替代结果和古气候模型联系在一起；在过去变化的背景下预测植被变化并评估21世纪的区域风险。