Riverscape organisation, anthropogenic disturbances and salmonid habitat

鲑鱼渔业在加拿大两个海岸的区域经济中扮演着重要的角色，而垂钓鲑鱼是加拿大内陆重要的娱乐产业。目前在淡水鲑鱼(鲑鱼、鲑鱼)栖息地的恢复和管理上花费了大量资金，这些栖息地受到筑坝、不当的林业和农场做法、公路建设等的威胁。为了最大限度地减少栖息地退化或更有效地进行恢复，重要的是了解河流沿岸最具生产力或最敏感的栖息地的位置。这项研究建议应用河流景观结构的新模型(沉积连接模型)来更好地回答这些问题。淡水三文鱼的产量关键取决于一个新的分水岭内不同溪流栖息地类型的复杂并置：湖泊、池塘冲刷卵石段、巨石快速段等；确保在距离内，个别鱼可以在生长过程中游泳，干净的砾石段用于繁殖和鱼苗饲养，巨石丰富的部分用于饲养较老的鲑鱼，最后是热避难所和后水道地带，允许在夏季高温应激和冬季与冰有关的应激时期生存。拟议的研究计划使用新的地球测量学、航空照片和野外技术来了解在这些空间尺度上对鲑鱼栖息地的地貌控制，并将这些知识应用于栖息地管理和保护。一个主要的研究重点是测试关于河景结构细节对鲑鱼丰度的影响的假说(沿山谷的沉积连接的长度和组织，基岩峡谷的间距和分布，巨石丰富区，以及少量冷水支流等)。

Salmon fisheries play a role in the regional economies along both coasts of Canada while trout angling is an important recreational industry in the Canadian interior. Substantial funds are currently spent on the rehabilitation and management of freshwater salmonid (salmon, trout) habitat, under threat from damming, improper forestry and farm practices, highway construction, etc.  To minimize habitat degradation or to be more effective in rehabilitation, it is important to understand where the most productive or most sensitive habitats  are located along a river. This research proposes to apply novel models of river landscape structure (sedimentary link models) to better answer these questions.Salmon production in freshwaters can critically depend on a complex juxtaposition of different stream habitat types within a  watershed: lakes, pool-riffle cobble reaches, boulder rapid reaches etc.; insuring, within distances that individual fish can  swim as they grow, clean, gravel-cobble reaches for reproduction and fry rearing, boulder-rich sections for rearing of older salmon parr, and finally thermal refugia and backchannel zones that allow survival through periods of heat stress in summer and ice-related stress in winter. The proposed research program uses novel geomatics, air photo and field techniques to understand the geomorphic controls on salmonid habitat acting across these spatial scales and applying this knowledge to habitat management and conservation. A major research focus is to test hypotheses concerning the effects on salmon abundances of details of riverscape structure (length  and organisation of 'sedimentary links' along valleys, spacing and distribution of bedrock canyons, of boulder rich zones, of   cool water tributaries, etc).