Limnology and diatom ecology of shallow lakes in a rapidly thawing discontinuous permafrost peatland ...

• Main Authors: Coleman, Kristen A., Hoskin, Grace N., Chasmer, Laura, Thienpont, Joshua R., Quinton, William L., Korosi, Jennifer B.
• Format: Other Non-Article Part of Journal/Newspaper
• Language: unknown
• Published: Taylor & Francis 2023
• Subjects: 59999 Environmental Sciences not elsewhere classified; FOS Earth and related environmental sciences; Ecology; FOS Biological sciences; 69999 Biological Sciences not elsewhere classified; Marine Biology; Inorganic Chemistry; FOS Chemical sciences; Canada; Northwest Territories; Scotty Creek; permafrost
• Online Access: https://dx.doi.org/10.6084/m9.figshare.21518381.v2; https://tandf.figshare.com/articles/journal_contribution/Limnology_and_diatom_ecology_of_shallow_lakes_in_a_rapidly_thawing_discontinuous_permafrost_peatland/21518381/2

Lakes in discontinuous permafrost peatlands are on the front lines of climate change, sensitive to even modest increases in air temperature. The aim of this study was to provide the first limnological characterization of shallow (∼1–2 m depth) lakes in the Scotty Creek basin (Northwest Territories, Canada), a field site of circumpolar significance due to the existence of long-term ecohydrological monitoring going back decades. We use this previous work as a foundation to advance our process-based understanding of the potential drivers of lake ecosystem change. Our results showed that dissolved organic carbon (DOC) and lake color were not correlated, a pattern that seems to be an important driver of diatom (siliceous single-celled algae) assemblages in these lakes. Diatoms in the study lakes tended to fall into 1 of 2 assemblage clusters. One cluster, composed of small benthic Fragilariaceae and small Navicula species (sensu lato), was found associated with higher lake color; the second cluster, composed of ...