Terrestrial/aquatic linkages in the recovery of disturbed ecosystems

受干扰生态系统恢复中的陆地/水生联系

• 批准号: 155154-2011
• 负责人: Gunn, John
• 金额: $ 2.33万
• 依托单位: Laurentian University of Sudbury
• 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
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=569425
• 关键词: Terrestrial; aquatic; linkages; recovery; disturbed

Disturbance, whether natural or anthropogenic in origin, occurs in all ecosystems but many systems are subject to severe disturbances and recovery is very protracted. Understanding the processes by which recovery occurs is needed to be able to predict the likely trajectories and end states that disturbed systems will achieve, and is also essential for the designing of effective remedial measures. In Boreal Shield watersheds different types of disturbances (e.g. fire, logging, and mining) differ considerably in their severity and in the timing and rate of recovery, but there appears to be common pathways related to water and nutrient availability in the recovery processes from the various types of disturbances. For example, littoral zones or riparian zones appear to be locations where damage is often most severe, but so too are opportunities for recovery and recolonization within these ecotones. Recent studies have shown that much of the productivity of dilute Shield lakes is terrestrially derived and concentrated in the littoral zones. This series of linked projects looks at the role of terrestrial organic matter (both dissolved organic carbon (DOC) and fine particulate organic matter (FPOM)) in the recovery of benthic invertebrates in riparian stream reaches and lake littoral zones in severely disturbed watersheds of the Boreal Shield ecozone of Canada. The work represents fundamental science with strong practical applications.

所有生态系统都会发生干扰，无论是自然的还是人为的，但许多系统都受到严重干扰，恢复过程非常漫长。了解恢复发生的过程是必要的，以便能够预测受干扰系统将达到的可能轨迹和最终状态，并且对于设计有效的补救措施也是必不可少的。在北方盾流域不同类型的干扰（如火灾，伐木，采矿）在其严重程度和恢复的时间和速度有很大的不同，但似乎有共同的途径有关的水和养分的可用性在恢复过程中从各种类型的干扰。例如，沿岸的区或河岸区似乎是损害往往最严重的地方，但在这些生态交错带内恢复和生态化的机会也是最严重的。最近的研究表明，稀释的盾湖的大部分生产力是陆地衍生的，集中在沿岸的地区。这一系列相互关联的项目着眼于陆地有机物（溶解有机碳和细颗粒有机物）在加拿大北方盾牌生态区严重扰动流域的河岸溪流和湖泊沿岸的区恢复底栖无脊椎动物方面的作用。这项工作代表了具有强大实际应用的基础科学。