Relations between forest disturbance, in-stream wood and aquatic habitat over river networks

河流网络上的森林干扰、河内木材和水生生境之间的关系

• 批准号: 250066-2007
• 负责人: Wei, Xiaohua(Adam)
• 金额: $ 1.17万
• 依托单位: University of British Columbia
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2007
• 资助国家: 加拿大
• 起止时间: 2007-01-01 至 2008-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=364389
• 关键词: Relations; between; forest; disturbance; stream

SummaryIn-stream wood or large woody debris (LWD) in forested streams is one of most important contributions of habitat and cover for fish populations. LWD has been intensively studied at the reach scale. However, little is known about variability of LWD and its ecological functions at multiple spatial scales.  Swanson (2003) suggested that a landscape perspective on LWD ecology over river networks and through time is one of the most needed future research directions. It is widely accepted that forest sustainability must be defined in temporal and spatial scales.  Studying natural disturbance is useful for understanding ecological processes and patterns at temporal scales. This is particularly important for the Canadian forests because of frequent wildfire.   Funded by a NSERC discovery grant, my first five-year (2002-2006) research project mainly focused on LWD long-term dynamics (temporal scales) in harvested and wildfire-disturbed forest watersheds in the BC interior. This new proposed research (2007-2011) will target LWD ecology over river networks at multiple spatial scales. My specific objectives include: (1) quantification of relations between LWD loadings and their ecological functions at various stream orders; (2) comparison of the above relations between wildfire and harvesting disturbances; and (3) determination of key mechanisms controlling LWD amount and distribution over river networks.  My long-term research goals are: (1) to integrate information of LWD loadings and functions at both spatial and temporal scales to fully understand LWD ecology; and (2) to link our results with sustainable forest and watershed management in the Canadian sub-boreal watersheds.

森林溪流中的摘要素木材或大型木质碎屑（LWD）是栖息地和鱼类种群覆盖的最重要贡献之一。 LWD在触及量表上进行了深入研究。但是，关于LWD的可变性及其在多个空间尺度下的生态功能知之甚少。斯旺森（Swanson，2003年）建议，关于河网络的LWD生态的景观观点，随着时间的流逝，是最需要的未来研究方向之一。人们普遍认为，森林可持续性必须以临时和空间尺度定义。研究自然灾害对于理解临时尺度上的生态过程和模式很有用。由于经常野火，这对于加拿大森林尤其重要。由NSERC Discovery Grant资助，我的第一个五年（2002-2006）研究项目主要集中在BC内部收获和野火扰动的森林流域中的LWD长期动态（时间尺度）。这项新提出的研究（2007-2011）将以多个空间尺度靶向LWD生态。我的具体目标包括：（1）LWD载荷之间的关系数量及其在各种流订单处的生态功能； （2）比较野火与收获灾难之间的上述关系； （3）确定控制LWD数量和分布在河网络上的关键机制。我的长期研究目标是：（1）在空间和临时尺度上整合LWD载荷和功能的信息，以充分了解LWD生态学； （2）将我们的结果与加拿大亚北方流域的可持续森林和分水岭管理联系起来。