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.

摘要森林溪流中的河流内木材或大型木质残骸（LWD）是鱼类种群栖息地和覆盖的最重要贡献之一，人们对河流范围内的LWD 及其生态变化知之甚少。 Swanson（2003）提出，从河流网络和时间角度观察随钻生态学是未来最需要的研究方向之一，人们普遍认为森林可持续性必须在时间和空间上进行定义。​ 研究自然扰动对于了解时间尺度上的生态过程和模式很有用，这对于经常发生野火的加拿大森林尤其重要。 ​ 由 NSERC 发现资助资助，我的第一个五年（2002-2006）研究项目主要是这样。这项新提出的研究重点关注 BC 内陆地区采伐和受野火干扰的森林流域的 LWD 长期动态（时间尺度）。 （2007-2011）将针对多个空间尺度的河流网络的随钻测井生态学，我的具体目标包括：（1）量化不同河流等级的随钻测井负荷与其生态功能之间的关系；（2）比较野火之间的上述关系。和收获干扰；（3）确定控制随钻测井量和河网分布的关键机制。我的长期研究目标是：（1）整合空间和时间尺度上的随钻测井负荷和功能信息。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流域管理联系起来。