Eco-Evolutionary Dynamics of Biological Recovery in Arsenic-Recovering Lakes

砷恢复湖泊生物恢复的生态进化动力学

• 批准号: RGPIN-2022-03706
• 负责人: Derry, Alison
• 金额: $ 2.91万
• 依托单位: Université du Québec à Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=765197
• 关键词: Eco; Evolutionary; Dynamics; Biological; Recovery

Hundreds of abandoned mines occur across northern Canada, places where human activities from decades ago continue to have environmental impacts in the present. Little work has examined the contemporary ecology of subarctic lakes as they rebound from historical mining pollution. Most ecosystem restoration or recovery frameworks have focused on biodiversity at the species level. Yet, interactions between adaptive intraspecific variation in populations, communities, and environmental change in ecosystems can modulate eco-evolutionary dynamics (reciprocal feedbacks between ecology and evolution), which may help explain ecological resilience in face of environmental change.  My long-term research objective is to integrate an eco-evolutionary framework for understanding biological impact and recovery in aquatic food webs challenged by anthropogenic disturbance. The goal of the Discovery Grant (DG) is to integrate an eco-evolutionary framework for addressing contemporary biological recovery in arsenic-contaminated lakes surrounding Yellowknife, NWT that were historically polluted by gold mining.  The short-term objectives are to evaluate: 1) Evolutionary responses to arsenic contamination. No studies have addressed evolutionary responses in aquatic organisms to arsenic pollution. My lab will use whole genome sequencing and laboratory experiments for A) a key pelagic grazer, Daphnia pulex, and B) an important emergent insect, chironomids, to test for adaptive evolution to historical arsenic exposure along a lake contamination gradient. 2) The extent to which evolutionary processes influences the ecology of biological recovery. There is a paucity of information regarding the extent to which evolutionary processes in populations can influence the ecology of communities and ecosystems. A) We will investigate the role of evolution in Daphnia pulex in zooplankton community re-assembly in arsenic-recovering lakes with field enclosure experiments and DNA metabarcoding. B) We will investigate the role of evolution in chironomids on cross-ecosystem subsidies of contaminants and essential fatty acids from aquatic habitats to the riparian food web. Understanding processes that facilitate or limit biological recovery of lakes impacted by historical mining emissions is essential for regaining benefits provided by these freshwater ecosystems to the livelihoods of Canadians, many of which influence most directly vulnerable groups of people. The research will evaluate the potential of intraspecific variation and eco-evolutionary dynamics to be integrated for the improved recovery and restoration of aquatic ecosystems challenged by human disturbance. It will provide advanced skills training for 3 PhD students and 5-10 undergraduate students, and experience working in the Canadian North. The DG responds to Canadian needs for HQP that are trained to solve global challenges that threaten freshwater ecosystems through integrative approaches from genes to ecosystems.

加拿大北部发生了数百个废弃的矿山，几十年前的人类活动在当前继续产生环境影响。很少有工作检查从历史采矿污染中反弹的亚北极湖泊的当代生态。大多数生态系统恢复或恢复框架都集中在物种一级的生物多样性上。然而，生态系统的种群，社区和环境变化的生态学内变化之间的相互作用可以调节生态进化动态（生态学和进化之间的相互反馈），这可能有助于面对环境变化的生态弥补。我的长期研究目标是整合一个生态进化的框架，以了解受人为灾难挑战的水生食物网中的生物学影响和恢复。发现补助金（DG）的目的是整合一个生态进化的框架，以解决Yellwknife周围的砷污染湖泊中现代生物学恢复，NWT历史上受到黄金采矿的历史污染。短期目标是评估：1）对砷污染的进化反应。没有研究涉及水生生物对砷污染的进化反应。我的实验室将使用整个基因组测序和实验室实验来a）a）关键的骨膜颗粒剂，达芙尼亚pulex和b）b）重要的新兴昆虫，人类杀菌剂，以对沿湖泊污染梯度的历史砷暴露的历史暴露进行适应性进化。 2）进化过程影响生物恢复的生态程度。关于人口中进化过程的程度可能影响社区和生态系统的生态，信息的信息很少。 a）我们将研究通过田间封闭实验和DNA metabarcoding在砷恢复湖泊中重新组装的浮游动物群体中进化的作用。 b）我们将研究进化在奇罗尼德在污染物和从水生栖息地到河岸食品网络的污染物和必需脂肪酸的交叉生态系统补贴的作用。了解促进或限制受历史采矿影响影响的湖泊生物恢复的过程对于恢复这些淡水生态系统提供的益处至关重要，加拿大人的生计，其中许多影响最直接的影响最直接脆弱的研究将评估研究内部进化和生态变化的潜力，并通过对人类的恢复进行了挑战，以构成灾难的恢复。它将为3名博士生和5至10名本科生提供高级技能培训，并在加拿大北部工作。 DG对加拿大对HQP的需求的反应经过训练，可以通过从基因到生态系统的综合方法来解决淡水生态系统的全球挑战。