Impact of the mountain pine beetle outbreak on the carbon and water balances of lodgepole pine stands in the BC interior

山松甲虫爆发对不列颠哥伦比亚省内陆黑松林碳水平衡的影响

• 批准号: 365247-2008
• 负责人: Black, Andrew
• 金额: $ 11.91万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2009
• 资助国家: 加拿大
• 起止时间: 2009-01-01 至 2010-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=434510
• 关键词: Impact; mountain; pine; beetle; outbreak

Management responses to mountain pine beetle (MPB)-affected lodgepole pine stands vary from complete removal of the pine canopy and secondary structure (saplings, seedlings, shrubs and herbaceous plants) to selective removal of MPB-affected trees with varying degrees of secondary structure retention, to completely non-invasive strategies, i.e., allowing secondary structure to grow undisturbed in a dead stand. The appropriate management response must balance the potential future economic viability of components of the secondary structure with the need to preserve habitat, ecosystem biodiversity and to minimize disturbance to the carbon and water balances of the stand and surrounding ecosystems. The current bias towards clearcut harvesting in mixed-species stands in the BC Interior reflects the realities of market demand for certain types of wood and paper products. However, the presence of significant secondary structure in many of the affected pine stands could provide opportunities for mid-term (15-30 years) timber harvest, provide habitat for wildlife and reduce run-off to rivers and streams if preserved during salvage-logging operations. By studying changes to stand-level biomass accumulation, evapotranspiration, and microclimate of the residual forest ecosystems in salvage-logged and non-salvage-logged stands, we will determine the relative health and resiliency of MPB-affected forest ecosystems, with the aim of recommending the best management response or combination of responses to the MPB outbreak. The use of remote sensing instruments and vegetation models calibrated against field measurements of ecosystem photosynthesis and decomposition will allow the results of the study to be scaled from stand level to the landscape.

对受山松甲虫 (MPB) 影响的黑松林的管理措施多种多样，从完全清除松树冠层和次生结构（树苗、幼苗、灌木和草本植物）到选择性地清除受 MPB 影响并保留不同程度次生结构的树木，再到完全非侵入性策略，即允许二级结构在死树中不受干扰地生长。 站立。适当的管理对策必须平衡二级结构组成部分未来潜在的经济可行性与保护栖息地、生态系统生物多样性的需要，并尽量减少对林分和周围生态系统碳和水平衡的干扰。目前BC省内陆地区对混合树种砍伐的倾向反映了市场对某些类型木材和纸制品的需求的现实。然而，许多受影响的松林中存在重要的次生结构，如果在抢救伐木作业期间得到保留，可以为中期（15-30 年）木材采伐提供机会，为野生动物提供栖息地，并减少流入河流和溪流的径流。通过研究抢救性采伐和非抢救性采伐林分中残留森林生态系统的林分生物量积累、蒸散量和小气候的变化，我们将确定受MPB影响的森林生态系统的相对健康和恢复力，目的是针对MPB爆发提出最佳管理应对措施或应对措施组合。使用根据生态系统光合作用和分解的现场测量校准的遥感仪器和植被模型将使研究结果从林分水平扩展到景观。