Transport, bioavailability and bioaccessibility of contaminants in the changing North

不断变化的北方污染物的传输、生物利用度和生物可及性

• 批准号: 305535-2012
• 负责人: Amyot, Marc
• 金额: $ 1.46万
• 依托单位: Université de Montréal
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Northern Research Supplement
• 财政年份: 2015
• 资助国家: 加拿大
• 起止时间: 2015-01-01 至 2016-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=571586
• 关键词: Transport; bioavailability; bioaccessibility; contaminants; changing

Climate change, new northern mining projects and increased atmospheric deposition from emerging Asian economies will modify the transport, transformation an fate of metal(oid)s in northern Canada, with unknown consequences on ecosystem health. I propose a polar program that will investigate key transformations that may affect the mobility, reactivity and availability to higher organisms of three key northern contaminants, mercury, arsenic and selenium, three elements with known biological interactions. Selected biogeochemical transformations in the cycling of metal(oid)s will be studied in an increasingly important and poorly known feature of the changing North, thaw ponds receiving old carbon from permafrost. Further, biochemical studies on the bioaccessibility of these elements in traditional food undergoing different preparation techniques will be studies by in vitro digestion, in consultation with northerners. This research will train 15 HQPs including 3 northerners. I propose an extensive program of interaction, communication, training and sharing of traditional knowledge with communities, hunters and trappers organizations and high schools. The program will be conducted at 5 northern locations. This grant is my only source of funding for transportation from Montreal to the North and for accomodations at Kuujjuarapik, Bylot, Pond Inlet, and Yellowknife, and it is therefore of vital importance for this research initiative. I have been very productive, with 37 scientific articles and 5 book chapters published in the last 6 years, and 41 persons trained. My comprehensive training program includes collaborations and internships in national and international labs, and close student supervision by me (including intensive writing workshops leading to high productivity by graduates). I have 16 years of experience in northern research, and I am confident to meet the objectives in an efficient and timely manner, with tangible original contributions to science and policy in Canada. With increasing interactions between climate change, mining activities and atmospheric deposition, this program will answer an urgent need for a better understanding of the anticipated changes in the fate of and exposure to key arctic contaminants in the North.

气候变化、新的北方采矿项目和亚洲新兴经济体增加的大气沉积将改变加拿大北方金属的运输、转化和命运，对生态系统健康产生未知的后果。我提出了一个极地计划，将调查的关键转变，可能会影响流动性，反应性和可用性，以更高的有机体的三个关键北方污染物，汞，砷和硒，三个元素与已知的生物相互作用。在不断变化的北方，解冻池接收来自永久冻土的旧碳的一个日益重要和鲜为人知的特征中，将研究金属（oid）循环中的选定地球化学转变。 此外，还将与北方人协商，通过体外消化法对采用不同制作技术的传统食品中这些元素的生物可利用性进行生物化学研究。本研究将培训15名HQP，其中包括3名北方人。我建议与社区、猎人和捕猎者组织以及高中开展一项广泛的互动、交流、培训和分享传统知识的方案。该计划将在北方的5个地点进行。这笔补助金是我从蒙特利尔到北方的交通费以及在Kuujjuarapik、Bylot、Pond Inlet和耶洛奈夫的住宿费的唯一资金来源，因此它对这项研究计划至关重要。我一直非常富有成效，在过去6年中发表了37篇科学文章和5本书的章节，并培训了41人。我的综合培训计划包括在国家和国际实验室的合作和实习，以及我对学生的密切监督（包括密集的写作研讨会，导致毕业生的高生产力）。我在北方研究方面有16年的经验，我有信心以有效和及时的方式实现目标，为加拿大的科学和政策做出切实的原创性贡献。随着气候变化，采矿活动和大气沉积之间的相互作用越来越多，该计划将满足更好地了解北方主要北极污染物命运和暴露的预期变化的迫切需要。