• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental science & policy >Vegetation thickening in an ecological perspective: significance to national greenhouse gas inventories
【24h】

Vegetation thickening in an ecological perspective: significance to national greenhouse gas inventories

机译：生态学视角下的植被增厚：对国家温室气体清单的意义

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

'Vegetation thickening' often refers to an increasing shrub and tree density on many grazed rangelands, woodlands and forests that may or may not have supported such woody plant populations in the past. It is one of several ecosystem changes, including post-clearing re-growth, afforestation and reforestation, which are variants of the same biological phenomenon - the recovery phase of disturbance/recovery cycles that all vegetation undergoes continuously. There are various levels of human influence over both phases. It is important as part of the global carbon cycle and potentially for its implications for implementation of the Kyoto Protocol. Vegetation thickening poses some inventory and carbon accounting challenges in this regard because of difficulties with quantification and attribution. The attribution of carbon sinks to natural, indirect or direct human influence is difficult because of the complex interactions of factors in determining woodland dynamics. The lack of clear scientific distinction of causation requires decisions to be made on how this is calculated in inventories of greenhouse gas emissions. Advantages, disadvantages, workability and dilemmas of five possible accounting approaches to dealing with these human-influenced biological components are discussed. These approaches range from accounting solely for emissions from clearing ignoring complementary re-growth sinks, to full emissions accounting including methane, nitrous oxide and CO_2 emissions from the managed animals and land.
机译：“植被增厚”通常是指许多放牧的牧场，林地和森林上的灌木丛和树木密度增加，过去它们可能支持也可能不支持这种木本植物种群。它是包括清除后的重新生长，造林和重新造林在内的几种生态系统变化之一，它们是同一生物现象的变体，即所有植被不断经历的扰动/恢复循环的恢复阶段。在这两个阶段中，人类的影响程度各不相同。作为全球碳循环的一部分，这一点很重要，并且可能会对它对《京都议定书》的执行产生影响。由于量化和归属方面的困难，植被增厚在这方面提出了一些清单和碳核算方面的挑战。由于决定林地动态的因素之间的复杂相互作用，很难将碳汇归因于自然，间接或直接的人类影响。缺乏对因果关系的明确科学区分，需要决定如何在温室气体排放清单中计算该因果关系。讨论了处理这些人为影响的生物成分的五种可能的会计方法的优缺点，可操作性和困境。这些方法的范围从仅对排放量进行核算，从忽略补充性的再生长汇清除到完全排放核算（包括被管理动物和土地的甲烷，一氧化二氮和CO_2排放）。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号