Canadian Journal of Fisheries and Aquatic Sciences, Ahead of Print.
Geographic context matters when trying to understand how permafrost thaw impacts northern freshwater biodiversity in a warming climate. Most risk to fresh water from thawing permafrost is associated with abrupt thaw processes known as thermokarst. Lake sediments can provide a record of thermokarst landscape development and associated biogeochemical and biodiversity trends over long timescales, providing a tool to link thermokarst geomorphology with freshwater biodiversity. We describe how paleolimnology, with its inherent emphasis on long-term perspectives, can characterize the shifting geographic template of warming thermokarst landscapes and its implications for biodiversity. We suggest aligning thermokarst lake paleolimnological research with hypothesis-testing frameworks used by permafrost hydrologists and biogeochemists and by the Freshwater Circumpolar Biodiversity Monitoring Program and advocate for knowledge co-production with northern Indigenous communities. Lastly, we stress the importance of considering geographic context in the choice of study sites to ensure that diverse thermokarst landscapes are represented (especially those most vulnerable to warming) and that the fine-scale differences in limnological settings that influence ecosystem response to thermokarst stressors are accounted for.

中文翻译：

---

多年冻土地貌不断变化的地理模板及其对北极淡水生物多样性的影响的古湖泊学观点

加拿大渔业和水生科学杂志，印刷前。
当试图了解在气候变暖的情况下永久冻土融化如何影响北部淡水生物多样性时，地理环境很重要。永久冻土融化对淡水造成的最大风险与被称为热岩溶的突然融化过程有关。湖泊沉积物可以提供长期热岩溶景观发展和相关生物地球化学和生物多样性趋势的记录，提供了将热岩溶地貌与淡水生物多样性联系起来的工具。我们描述了古湖沼学，其固有的强调长期观点，可以描述变暖的热喀斯特地貌不断变化的地理模板及其对生物多样性的影响。我们建议将热喀斯特湖古湖泊学研究与永久冻土水文学家和生物地球化学家以及淡水环极地生物多样性监测计划使用的假设检验框架结合起来，并倡导与北部土著社区共同生产知识。最后，我们强调在选择研究地点时考虑地理环境的重要性，以确保代表不同的热岩溶景观（尤其是那些最容易受到变暖影响的景观），以及影响生态系统对热岩溶压力源反应的湖沼环境的细微差异是占。