Forests communities in transition: Eocene fossil sites from western and Arctic Canada

转型中的森林群落:加拿大西部和北极地区的始新世化石遗址

基本信息

  • 批准号:
    RGPIN-2016-04337
  • 负责人:
  • 金额:
    $ 2.11万
  • 依托单位:
  • 依托单位国家:
    加拿大
  • 项目类别:
    Discovery Grants Program - Individual
  • 财政年份:
    2022
  • 资助国家:
    加拿大
  • 起止时间:
    2022-01-01 至 2023-12-31
  • 项目状态:
    已结题

项目摘要

North Americantemperate forests in the geological past shared many plant genera with eastAsia and Europe (e.g. Pseudolarix, Acer, Sassafras, and Trochodendron).Exchange between these geographic regions is not possible today as thedispersal corridors have been too cold for 3-15 million years. Climate warmingepisodes in the geological past, however, facilitated biotic exchange betweenthem. The fossil record provides a primary record of the presence of plant taxaand of climate in the past. The proposed work will focus on the early Eoceneepoch (ca. 5647.8 MYA) when much of North America supported a tropical faunaand flora, mid-latitude mean annual temperatures (MAT) were ca. 20C with mildfrost-free winters, and even the Arctic hosted alligators. These warm highlatitude early Eocene climates opened a northern dispersal route for plants andanimals via the Arctic. Fossil localities in British Columbia present the onlyrecord of the Eocene from Canada outside the Arctic - ranging from cool (MAT1012C) elevated upland lake sites that supported forests of mixed temperateand tropical biota, to warm (MAT 1520C) lowland environments on the Pacificcoast of BC and WA that included palms. The proposed research program has theselong term objectives: (1) Develop a synthesis of changes in forest communitiesthrough time, i.e., dominance, diversity and first appearances (origination oflineages), both within and between fossil sites; (2) Determine regional andtemporal patterns of biotic diversity, and its relation to change in climate,i.e. the biotic consequences of past climate change and climate as anevolutionary driver. Short term objectives are focused on: (1) the McAbeefossil beds and targeted sites elsewhere in BC to reconstructpaleoenvironments; (2) completion of analyses of existing collections of ArcticEocene sites; and (3) systematic analysis of these sites expanding asopportunity allows to include other plant fossil sites from British Columbia tobroaden the scope both temporally and spatially to cover more of BC. Fossilsites in BC will be sampled along bedding planes to isolate forest communitiesseparated in time. These fossil sites are stratigraphically correlated usingradiometrically datable volcanic ashes, placing all of the fossil study sitesinto a chronological sequence. By documenting every identifiable fossilcollected we will reconstruct climate, forest composition, and diversity atecological time scales. The objective for detailed systematic analyses of theBC sites rich record of fossil leaves, flowers and seeds will identify keyplant families and genera and potentially clarify first appearances of thesetaxa as these Eocene sites are rich in important temperate and subtropicalplant families. This study will provide data that helps understand how forestcommunities responded to past global warming as well as on the emergence ofmodern temperate ecosystems.
北美温带森林在过去的地质时期与东亚和欧洲有许多植物属相同(例如:Pseudolarix、Acer、Sassafras和Trochodendron)。由于散布走廊在300 - 1500万年间太冷,这些地理区域之间的交流在今天是不可能的。然而,地质学过去的气候变暖事件促进了它们之间的生物交换。化石记录提供了过去植物分类群存在和气候的原始记录。建议的工作将集中在早期Eoceneepoch(约。5647.8MYA),当北美大部分地区支持热带动物群和植物群时,中纬度年平均气温(MAT)约为1.56 × 10 - 5。20摄氏度,冬天温和无霜,甚至北极也有短吻鳄。始新世早期温暖的高纬度气候为动植物经由北极向北方扩散开辟了一条路线。不列颠哥伦比亚省的化石地点提供了加拿大北极以外始新世的唯一记录--从支持温带和热带混合生物群森林的凉爽(MAT 1012 C)高地湖泊,到不列颠哥伦比亚省和华盛顿州太平洋海岸的温暖(MAT 1520 C)低地环境,包括棕榈树。该研究计划的长期目标是:(1)建立森林群落随时间变化的综合,即:(2)确定生物多样性的区域和时间模式及其与气候变化的关系,即过去气候变化的生物后果和气候作为进化驱动因素。近期目标是:(1)McAbee化石层和不列颠哥伦比亚省其他地方的目标地点,以重建古环境;(2)完成对现有北极始新世地点收集的分析;(3)对这些地点进行系统分析,扩大机会,包括来自不列颠哥伦比亚省的其他植物化石地点,以扩大时间和空间范围,覆盖更多的不列颠哥伦比亚省。BC的化石遗址将沿着层面取样,以隔离在时间上分开的森林群落。这些化石地点是地层相关的使用放射性测年火山灰,把所有的化石研究地点到一个时间序列。通过记录每一个可识别的化石收集,我们将重建气候,森林组成和多样性生态时间尺度。对BC遗址的详细系统分析的目标是丰富的化石叶,花和种子记录,将确定关键的植物科和属,并可能澄清这些分类群的首次出现,因为这些始新世遗址富含重要的温带和亚热带植物科。这项研究将提供数据,有助于了解森林群落如何应对过去的全球变暖以及现代温带生态系统的出现。

项目成果

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Greenwood, David其他文献

The adoption of 4D BIM in the UK construction industry: an innovation diffusion approach
Roadmap on Li-ion battery manufacturing research
  • DOI:
    10.1088/2515-7655/ac8e30
  • 发表时间:
    2022-10-01
  • 期刊:
  • 影响因子:
    6.9
  • 作者:
    Grant, Patrick S.;Greenwood, David;Cumming, Denis J.
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  • DOI:
    10.1016/j.autcon.2014.10.004
  • 发表时间:
    2015-01-01
  • 期刊:
  • 影响因子:
    10.3
  • 作者:
    Malsane, Sagar;Matthews, Jane;Greenwood, David
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    Greenwood, David
The Cloud Adoption Toolkit: supporting cloud adoption decisions in the enterprise
  • DOI:
    10.1002/spe.1072
  • 发表时间:
    2012-04-01
  • 期刊:
  • 影响因子:
    3.5
  • 作者:
    Khajeh-Hosseini, Ali;Greenwood, David;Sommerville, Ian
  • 通讯作者:
    Sommerville, Ian

Greenwood, David的其他文献

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{{ truncateString('Greenwood, David', 18)}}的其他基金

Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2021
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2020
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2019
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2018
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2017
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Forests communities in transition: Eocene fossil sites from western and Arctic Canada
转型中的森林群落:加拿大西部和北极地区的始新世化石遗址
  • 批准号:
    RGPIN-2016-04337
  • 财政年份:
    2016
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Ancient forests and climates of the Paleogene of Canada
加拿大古近纪的古老森林和气候
  • 批准号:
    311934-2008
  • 财政年份:
    2012
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Ancient forests and climates of the Paleogene of Canada
加拿大古近纪的古老森林和气候
  • 批准号:
    311934-2008
  • 财政年份:
    2011
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Ancient forests and climates of the Paleogene of Canada
加拿大古近纪的古老森林和气候
  • 批准号:
    311934-2008
  • 财政年份:
    2010
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual
Ancient forests and climates of the Paleogene of Canada
加拿大古近纪的古老森林和气候
  • 批准号:
    311934-2008
  • 财政年份:
    2009
  • 资助金额:
    $ 2.11万
  • 项目类别:
    Discovery Grants Program - Individual

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