Land-use legacies in ecosystems: impacts of historical land use on carbon storage and species composition in Quebec

生态系统中的土地利用遗产：历史土地利用对魁北克碳储存和物种组成的影响

• 批准号: 386653-2012
• 负责人: Rhemtulla, Jeanine
• 金额: $ 2.26万
• 依托单位: McGill University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2012
• 资助国家: 加拿大
• 起止时间: 2012-01-01 至 2013-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=507731
• 关键词: Land; use; legacies; ecosystems; impacts

Anthropogenic land-use is the most pervasive and persistent driver of change in ecosystems. At the global scale, land-use is the second greatest source of net carbon dioxide emissions to the atmosphere and the most important driver of biodiversity loss. Moreover, land-use legacies can persist for thousands of years after direct use has ceased through altered nutrient cycling and species composition. Despite the importance of land-use legacies in ecosystems, many of the underlying mechanisms are still not well understood. The role of land-use history in driving the critical terrestrial carbon sink, for example, remains uncertain, as do the mechanisms by which land use history affects biodiversity.

人为土地利用是生态系统变化最普遍和最持久的驱动因素。在全球范围内，土地利用是大气二氧化碳净排放的第二大来源，也是生物多样性丧失的最重要驱动因素。此外，通过改变养分循环和物种组成，土地利用遗产可以在直接利用停止后持续数千年。尽管土地利用遗产在生态系统中的重要性，但许多潜在的机制仍然没有得到很好的理解。例如，土地利用历史在驱动关键陆地碳汇方面的作用仍然不确定，土地利用历史影响生物多样性的机制也不确定。