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Novel fire regimes in the Far North? Natural variability, anthropogenic change, and biogeochemical consequences

  • 报告题目:Novel fire regimes in the Far North? Natural variability, anthropogenic change, and biogeochemical consequences
  • 系列:“生态与环境讲坛”系列第 208
  • 报告人:胡逢生 教授
  • 时间:6月8日(周五)上午10:00-
  • 地点:金泉楼A239
  • 来访单位:美国伊利诺伊大学
  • 邀请人:李庆顺 教授/院长
  • 摘要:Concerns about the environmental and socioeconomic consequences of anthropogenic warming have motivated numerous investigations of climate change and its impact on ecosystems. High-latitude ecosystems are of particular interest because they are projected to be among the most sensitive to anthropogenic forcing and because biogeochemical and biophysical feedbacks to the global system can exacerbate climatic warming. The frequency and extent of boreal and tundra fires in recent years appear striking, possibly as a result of anthropogenic warming. Are these recent fires unprecedented? Or do they occur naturally, with observational and satellite records too brief to capture the true natural range of variability? Because fire return intervals are long in these systems, assessing the possibility of rising novelty from the complex effects of climate change on fire regimes requires a holistic perspective from paleo-analyses, field observations, and computer modeling. In this presentation, I synthesize recent studies of fire-regime variability, place ongoing and projected future changes in the context of natural variability, and discuss their biogeochemical implications.

  • 简介:胡逢生教授为美国伊利诺伊大学(香槟分校)教授,曾担任伊利诺伊大学植物生物学系系主任(2008-2014)、生命与物理科学学院副院长(2014-2016),现任伊利诺伊大学人文科学学院院长。主要研究方向为生物、地质和大气科学交叉学科,他攻克了一系列有关气候变化及多时空尺度生态响应的历史难题,在Nature, Science, PNAS, Ecology, and Geology等国际顶级期刊发表权威论文超过120篇。2000年,胡逢生教授成为24位当选帕卡德研究员的年轻教授之一,这一奖项旨在表彰非凡创造力的教授,是美国最具竞争力的奖项之一。2005年,他与其他5位在各自领域排名前5%的教授一起当选成为全球排名第25的伊利诺伊大学公认的大学特聘教授。2006-2007年,成为法国的富布赖特学者。2008年,当选为美国科学促进会成员。
    此外,胡逢生教授还曾担任国际顶级刊物Ecology, Ecological Monographs, Ecosystems及Geology 的编辑,更是Ecological Applications 的特邀编辑。
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