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

预测鳟鱼湖中的溶解氧浓度：为多重压力源世界开发新工具

• 批准号: 447362-2013
• 负责人: Smol, John
• 金额: $ 9.22万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Strategic Projects - Group
• 财政年份: 2014
• 资助国家: 加拿大
• 起止时间: 2014-01-01 至 2015-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=554546
• 关键词: Predicting; dissolved; oxygen; concentrations; Lake

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

加拿大的鳟鱼湖无论在经济（仅在安大略省，钓鱼者在休闲钓鱼相关的商品和服务上就花费了约 1.7 亿美元，其中湖鳟是许多钓鱼者的首选品种）和生态方面都是稀有而宝贵的自然资源。然而，湖鳟鱼种群正日益受到多种环境压力因素（例如过度捕捞、与引进物种的竞争、养分负荷）的威胁，再加上气候变暖加速的“威胁倍增器”。人们越来越担心许多鳟鱼湖深水区的栖息地质量由于氧气耗尽而下降。此外，新的证据表明，深水氧浓度下降可能发生在养分输入没有增加的湖泊中，甚至在磷输入或湖泊养分浓度随着时间的推移而减少的情况下，为“养分增加，深水减少”创造了例外。