Predicting dissolved oxygen concentrations in Lake Trout lakes: Developing new tools for a multiple-stressor world

加拿大的鲑湖是一种稀有而宝贵的自然资源，无论是在经济方面(仅在安大略省，垂钓者在与休闲钓鱼相关的商品和服务上花费约17亿美元，湖鲑鱼是许多垂钓者的首选物种)和生态条件。然而，湖泊鲑鱼种群正日益受到多种环境压力的威胁(如过度捕捞、与引进物种的竞争、营养负荷)，并增加了气候变暖加速的“威胁倍增”。人们越来越担心，由于氧气枯竭，许多鲑湖深水的栖息地质量正在下降。此外，新的证据表明，在营养物质输入没有增加的湖泊中，甚至在磷输入或湖泊营养物质浓度随着时间的推移而减少的湖泊中，深水氧浓度可能正在下降，这创造了“营养物质增加，深海减少”的例外情况

Canada's Lake Trout lakes are a rare and valuable natural resource in both economic (in Ontario alone, anglers spend an estimated 1. 7 billion dollars on goods and services related to recreational fishing, with lake trout being the preferred species among many anglers) and ecological terms. However, lake trout populations are becoming increasingly threatened by multiple environmental stressors (e.g., over-exploitation, competition with introduced species, nutrient loading), with the added "threat-multiplier" of accelerated climate warming. There is growing concern that habitat quality in the deep waters of many Lake Trout lakes is declining due to oxygen depletion. Moreover, new evidence suggests that declines in deepwater oxygen concentrations may be occurring in lakes where nutrient inputs have not increased, or even where phosphorus inputs or lake nutrient concentrations have decreased over time, creating exceptions to the "increased nutrients, decreased deepwater