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Erect shrub encroachment in the High Arctic: evidence and consequences

Erect shrub encroachment in the High Arctic: evidence and consequences
高北极地区的直立灌木侵占:证据和后果
批准号:
RGPIN-2015-05319
负责人:
Lévesque, Esther
金额:
$2.33万
依托单位国家:
加拿大
项目类别:
Discovery Grants Program - Individual
财政年份:
2015
资助国家:
加拿大
项目状态:
已结题
起止时间:
2015-01-01 至 2016-12-31

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中文摘要
翻译
关于低北极地区灌木覆盖率增加的报告越来越多,而低北极和高北极之间的过渡情况仍然没有得到充分研究。然而,我们最近强调了灌木对接近其纵向极限的气候变化的敏感性。只有匍匐植被生长的直立灌木覆盖(20至70厘米高或更高)的增加将彻底改变高北极地区。与树线相似,我把这种过渡称为直立灌木线。这些灌木的孤立种群在这些纬度地区保持了多年,但最近的变暖可能促进了更好的生长和/或生产更有活力的种子。如果是这种情况,直立的灌木可能会侵入邻近的匍匐群落。
英文摘要
Reports of increasing shrub cover in the Low Arctic are mounting whereas the situation at the transition between Low and High Arctic, remains understudied. Yet we recently highlighted the sensitivity of shrubs to climate variability near their longitudinal limit. An increase in erect shrub cover (20 to 70cm high or more) where only prostrate vegetation grows would drastically transform the High Arctic. Similarly to the treeline, I refer to this transition as the erect shrubline. Isolated populations of these shrubs have maintained themselves for years at these latitudes but the recent warming may have promoted better growth and/or production of more viable seeds. If this is the case, erect shrubs may invade adjacent prostrate communities.
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Erect shrub encroachment in the High Arctic: evidence and consequences
  • 批准号:
    RGPIN-2015-05319
  • 项目类别:
    Discovery Grants Program - Individual
  • 资助金额:
    $2.33万
  • 财政年份:
    2021
  • 负责人:
    Lévesque, Esther
  • 依托单位:
Erect shrub encroachment in the High Arctic: landscape transformation
  • 批准号:
    331407-2015
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
  • 资助金额:
    $1.46万
  • 财政年份:
    2021
  • 负责人:
    Lévesque, Esther
  • 依托单位:
Erect shrub encroachment in the High Arctic: landscape transformation
  • 批准号:
    331407-2015
  • 项目类别:
    Discovery Grants Program - Northern Research Supplement
  • 资助金额:
    $1.46万
  • 财政年份:
    2020
  • 负责人:
    Lévesque, Esther
  • 依托单位:
Erect shrub encroachment in the High Arctic: evidence and consequences
  • 批准号:
    RGPIN-2015-05319
  • 项目类别:
    Discovery Grants Program - Individual
  • 资助金额:
    $2.33万
  • 财政年份:
    2020
  • 负责人:
    Lévesque, Esther
  • 依托单位:
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