Coastal aquatic ecosystems: integrators of environmental change in Canada's high Arctic

我的NSERC研究计划将侧重于淡水生态系统和它们对环境变化的反应过程。我的研究小组将重点放在极端的北方湖泊（沿着北方埃尔斯米尔岛海岸），这些湖泊是北极气候变暖的宝贵哨兵，因为它们位于北冰洋海冰与北极群岛陆地环境交汇的高度动态区域。这是加拿大变暖最快的地区之一;尽管那里的湖泊正在被持续的气候变化所改变，但人们对其功能的许多方面知之甚少。在这些湖泊的沉积物中，还保存着过去气候变化的记录，这将有助于我们了解最近观察到的北冰洋冰的恶化是否在自然变化的范围内。我们将进行研究，以更好地了解这些沿海湖泊的过程，并从沉积物岩心重建区域全新世气候历史。 这些目标将通过研究湖沼学过程和分析湖泊的沉积记录来实现，利用现代古生态技术推断过去的环境条件。研究中应用的代用指标将包括从高光谱岩心扫描和硅藻、光合色素、有机物和地球化学标志分析中得出的推论。我的研究将有助于了解加拿大北极地区最近变暖的生态影响，并深入了解北极地区的气候在过去几千年中是如何变化的。

My NSERC research program will focus on freshwater ecosystems and the processes by which they respond to environmental change. My research team will place emphasis on extreme northern lakes (along the coast of northern Ellesmere Island), which are valuable sentinels of Arctic climate warming because they are located in a highly dynamic region where Arctic Ocean sea ice meets the terrestrial environments of the Arctic Archipelago. This is one of the most rapidly warming regions in Canada; although lakes there are being altered by ongoing climate change, little is known about many aspects of their functioning. In their sediments, these lakes also hold records of past climate change that will help us to understand whether the recent observed deterioration of Arctic Ocean ice is within ranges of natural variability. We will perform research to better understand processes in these coastal lakes, and also reconstruct regional Holocene climate history from sediment cores. These objectives will be accomplished through studies of limnological processes and analysis of the sedimentary records of lakes, using modern paleoecological techniques to infer past environmental conditions. Proxy indicators applied in the research will include inferences from hyperspectral core scans and analysis of diatoms, photosynthetic pigments, organic matter and geochemical markers. My research will help to understand the ecological effects of recent warming in Canada's Arctic, and provide insights into how the high Arctic's climate has changed over the past several millennia.