Ecosystem responses to sportfish stocking and aeration in boreal foothills lakes

在整个北美西部，在自然缺乏运动鱼类的内陆沃茨放养非本地鳟鱼是一种行之有效的管理活动，创造了新的休闲渔业。阿尔伯塔可持续资源开发（ASRD）和阿尔伯塔保护协会（ACA）目前在全省各地储备湖泊，包括小型北方山麓湖泊。然而，在淡水生态系统中添加顶级捕食者可能会对潜在的鳟鱼竞争对手以及鳟鱼的猎物水生无脊椎动物和两栖动物产生重大的生态影响。这些直接影响反过来又会影响到食物网的其他组成部分。然而，与大多数以前的研究不同的是，我们研究的北方山麓湖泊生产力更高，并包含本地种群的无脊椎动物和哈代饲料鱼。的

Throughout western North America, the stocking of inland waters that naturally lack sportfishes with non-native trout is a well-established management activity that creates new recreational fisheries. Alberta Sustainable Resource Development (ASRD) and the Alberta Conservation Association (ACA) currently stock lakes throughout the province, including small Boreal Foothills lakes. However, adding a top-predator into a fresh water ecosystem can have significant ecological impacts on potential trout competitors, and for aquatic invertebrates and amphibians that are the prey of the trout. These direct impacts can, in turn, affect other components of the food web. Unlike settings of most previous studies, however, the Boreal Foothills lakes of our study are more productive, and contain native populations of invertebrates and hardy forage fishes. The