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View article: Spatio‐Temporal Resolution of Microbial Functions and Taxa Associated With Cyanobacterial Harmful Algae Blooms Along a 500‐Km Aquatic Continuum in the Lake Erie Watershed
Spatio‐Temporal Resolution of Microbial Functions and Taxa Associated With Cyanobacterial Harmful Algae Blooms Along a 500‐Km Aquatic Continuum in the Lake Erie Watershed Open
Biogeochemical processes rendered by the aquatic microbiome could influence the development of cyanobacterial harmful algal blooms (cHABs), but those biotic factors are poorly understood and rarely considered. We focused on the link betwee…
View article: Long-term decomposition of above- and below-ground tissue of two Arctic shrub species
Long-term decomposition of above- and below-ground tissue of two Arctic shrub species Open
Arctic soils may become a major source of greenhouse gas emissions, as the climate changes. It is thus crucial to understand decomposition dynamics of permafrost soils, which are influenced by a myriad of abiotic and biotic factors includi…
View article: Terrestrial-aquatic connectivity structures microbial communities during the formation of thermokarst lakes
Terrestrial-aquatic connectivity structures microbial communities during the formation of thermokarst lakes Open
Rising air temperatures and permafrost degradation drive the erosion of palsas (permafrost mounds mainly composed of frozen peat and ice layers) and lead to the formation of thermokarst ponds and lakes, known for their high greenhouse gas …
View article: Author Correction: Expert elicitation of state shifts and divergent sensitivities to climate warming across northern ecosystems
Author Correction: Expert elicitation of state shifts and divergent sensitivities to climate warming across northern ecosystems Open
Northern regions are warming faster than the rest of the globe. It is difficult to predict ecosystem responses to warming because the thermal sensitivity of their biophysical components varies. Here, we present an analysis of the authors’ …
View article: Expert elicitation of state shifts and divergent sensitivities to climate warming across northern ecosystems
Expert elicitation of state shifts and divergent sensitivities to climate warming across northern ecosystems Open
Northern regions are warming faster than the rest of the globe. It is difficult to predict ecosystem responses to warming because the thermal sensitivity of their biophysical components varies. Here, we present an analysis of the authors’ …
View article: Carbon dynamics in an alluvial fan in the eastern Canadian Arctic
Carbon dynamics in an alluvial fan in the eastern Canadian Arctic Open
Alluvial fans are common features of mountainous landscapes in circumpolar regions and are characterized by a suit of hillslope processes that drive sediment distribution. At present there is little known about the biogeochemistry of these…
View article: Microbial degradation of naphthenic acids using constructed wetland treatment systems: metabolic and genomic insights for improved bioremediation of process-affected water
Microbial degradation of naphthenic acids using constructed wetland treatment systems: metabolic and genomic insights for improved bioremediation of process-affected water Open
Naphthenic acids (NAs) are a complex mixture of organic compounds released during bitumen extraction from mined oil sands that are important contaminants of oil sands process-affected water (OSPW). NAs can be toxic to aquatic organisms and…
View article: Rapid on-site detection of harmful algal blooms: real-time cyanobacteria identification using Oxford Nanopore sequencing
Rapid on-site detection of harmful algal blooms: real-time cyanobacteria identification using Oxford Nanopore sequencing Open
With the increasing occurrence and severity of cyanobacterial harmful algal blooms (cHAB) at the global scale, there is an urgent need for rapid, accurate, accessible, and cost-effective detection tools. Here, we detail the RosHAB workflow…
View article: State shifts and divergent sensitivities to climate warming across northern ecosystems
State shifts and divergent sensitivities to climate warming across northern ecosystems Open
Northern ecosystems are among the most exposed to warming and their responses are difficult to anticipate due to the variable sensitivity of their biophysical components. Using an analysis based on expert assessment, we investigated hetero…
View article: Sources of exposure to lead in Arctic and subarctic regions: a scoping review
Sources of exposure to lead in Arctic and subarctic regions: a scoping review Open
Understanding lead exposure pathways is a priority because of its ubiquitous presence in the environment as well as the potential health risks. We aimed to identify potential lead sources and pathways of lead exposure, including long-range…
View article: Nunataryuk field campaigns: understanding the origin and fate of terrestrial organic matter in the coastal waters of the Mackenzie Delta region
Nunataryuk field campaigns: understanding the origin and fate of terrestrial organic matter in the coastal waters of the Mackenzie Delta region Open
Climate warming and related drivers of soil thermal change in the Arctic are expected to modify the distribution and dynamics of carbon contained in perennially frozen grounds. Thawing of permafrost in the Mackenzie River watershed of nort…
View article: Spatio-temporal connectivity of the aquatic microbiome associated with cyanobacterial blooms along a Great Lake riverine-lacustrine continuum
Spatio-temporal connectivity of the aquatic microbiome associated with cyanobacterial blooms along a Great Lake riverine-lacustrine continuum Open
Lake Erie is subject to recurring events of cyanobacterial harmful algal blooms (cHABs), but measures of nutrients and total phytoplankton biomass seem to be poor predictors of cHABs when taken individually. A more integrated approach at t…
View article: Prevalence and ecological features of deep chlorophyll layers in Lake of the Woods, a complex hydrological system with strong trophic, physical, and chemical gradients
Prevalence and ecological features of deep chlorophyll layers in Lake of the Woods, a complex hydrological system with strong trophic, physical, and chemical gradients Open
We characterized deep chlorophyll layers (DCLs), previously unknown, in Lake of the Woods (Canada), a complex hydrological system with strong trophic, physical, and chemical gradients. Of 42 sites, five (12 %) contained at least one dense,…
View article: Sentinel responses of Arctic freshwater systems to climate: linkages, evidence, and a roadmap for future research
Sentinel responses of Arctic freshwater systems to climate: linkages, evidence, and a roadmap for future research Open
While the sentinel nature of freshwater systems is now well recognized, widespread integration of freshwater processes and patterns into our understanding of broader climate-driven Arctic terrestrial ecosystem change has been slow. We revi…
View article: Editorial: Digitizing frozen earth—revealing microbial diversity and physiology in the cryobiosphere through “omics” tools, volume II
Editorial: Digitizing frozen earth—revealing microbial diversity and physiology in the cryobiosphere through “omics” tools, volume II Open
We thank Sentinel North (CFREF) and ArcticNet (NCE) for funding support for the T-MOSAiC workshop. Natural Sciences and Engineering Research Council of Canada (NSERC, #RGPIN-2020-06874). DV and SC were supported by CAMUAM funds (ref.: SI3-…
View article: The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada
The Distribution of Soil Carbon and Nitrogen Stocks Among Dominant Geomorphological Terrain Units in Qarlikturvik Valley, Bylot Island, Arctic Canada Open
Soils of circumpolar regions store large amounts of carbon (C) and are a crucial part of the global C cycle. Yet, little is known about the distribution of soil C stocks among geomorphological terrain units of glacial valleys in the Arctic…
View article: Soil carbon and nitrogen stock data for dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada
Soil carbon and nitrogen stock data for dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada Open
Dataset for the manuscript 'The distribution of soil carbon and nitrogen stocks among dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada.' to appear in the 'Journal of Geophysical Research: Biogeosc…
View article: Soil carbon and nitrogen stock data for dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada
Soil carbon and nitrogen stock data for dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada Open
Dataset for the manuscript 'The distribution of soil carbon and nitrogen stocks among dominant geomorphological terrain units in Qarlikturvik Valley, Bylot Island, Arctic Canada.' to appear in the 'Journal of Geophysical Research: Biogeosc…
View article: Nunataryuk field campaigns: Understanding the origin and fate of terrestrial organic matter in the coastal waters of the Mackenzie Delta region
Nunataryuk field campaigns: Understanding the origin and fate of terrestrial organic matter in the coastal waters of the Mackenzie Delta region Open
Climate warming and related drivers of soil thermal change in the Arctic are expected to modify the distribution and dynamics of carbon contained in perennially frozen grounds. Thawing of permafrost in the Mackenzie Delta region of northwe…
View article: Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones
Terrestrial Dissolved Organic Matter Mobilized From Eroding Permafrost Controls Microbial Community Composition and Growth in Arctic Coastal Zones Open
Climate warming is accelerating erosion along permafrost-dominated Arctic coasts. This results in the additional supply of organic matter (OM) and nutrients into the coastal zone. In this study we investigate the impact of coastal erosion …
View article: Permafrost-derived dissolved organic matter character controls microbial community composition in Arctic coastal waters
Permafrost-derived dissolved organic matter character controls microbial community composition in Arctic coastal waters Open
<p>Climate warming is accelerating erosion rates along permafrost-dominated Arctic coasts. To study the impact of erosion on marine microbial community composition and growth in the Arctic coastal zone, dissolved organic matter (DOM)…
View article: Rapid assessment of phytoplankton assemblages using Next Generation Sequencing – Barcode of Life database: a widely applicable toolkit to monitor biodiversity and harmful algal blooms (HABs)
Rapid assessment of phytoplankton assemblages using Next Generation Sequencing – Barcode of Life database: a widely applicable toolkit to monitor biodiversity and harmful algal blooms (HABs) Open
Harmful algal blooms have important implications for the health, functioning and services of aquatic ecosystems. Our ability to detect and monitor these events is often challenged by the lack of rapid and cost-effective methods to identify…
View article: Microbial connectivity and sorting in a High Arctic watershed
Microbial connectivity and sorting in a High Arctic watershed Open
Aquatic ecosystems in the High Arctic are facing unprecedented changes as a result of global warming effects on the cryosphere. Snow pack is a central feature of northern landscapes, but the snow microbiome and its microbial connectivity t…
View article: Diversity and potential activity of methanotrophs in high methane-emitting permafrost thaw ponds
Diversity and potential activity of methanotrophs in high methane-emitting permafrost thaw ponds Open
Lakes and ponds derived from thawing permafrost are strong emitters of carbon dioxide and methane to the atmosphere, but little is known about the methane oxidation processes in these waters. Here we investigated the distribution and poten…
View article: Contribution of different bacterial dispersal sources to lakes: Population and community effects in different seasons
Contribution of different bacterial dispersal sources to lakes: Population and community effects in different seasons Open
Summary The diversity and composition of lake bacterial communities are driven by the interplay between local contemporary environmental conditions and dispersal of cells from the surroundings, i.e. the metacommunity. Still, a conceptual u…
View article: Effects of Dispersal and Initial Diversity on the Composition and Functional Performance of Bacterial Communities
Effects of Dispersal and Initial Diversity on the Composition and Functional Performance of Bacterial Communities Open
Natural communities are open systems and consequently dispersal can play an important role for the diversity, composition and functioning of communities at the local scale. It is, however, still unclear how effects of dispersal differ depe…
View article: Co-occurrence patterns in aquatic bacterial communities across changing permafrost landscapes
Co-occurrence patterns in aquatic bacterial communities across changing permafrost landscapes Open
Permafrost thaw ponds and lakes are widespread across the northern landscape and may play a central role in global biogeochemical cycles, yet knowledge about their microbial ecology is limited. We sampled a set of thaw ponds and lakes as w…
View article: Phototrophic pigment diversity and picophytoplankton in permafrost thaw lakes
Phototrophic pigment diversity and picophytoplankton in permafrost thaw lakes Open
Permafrost thaw lakes (thermokarst lakes) are widely distributed across the northern landscape, and are known to be biogeochemically active sites that emit large amounts of carbon to the atmosphere as CH4 and CO2. However, the abundance an…
View article: Editorial: Microbial Responses to Environmental Changes
Editorial: Microbial Responses to Environmental Changes Open
EDITORIAL article Front. Microbiol., 02 December 2015Sec. Aquatic Microbiology Volume 6 - 2015 | https://doi.org/10.3389/fmicb.2015.01364
View article: Phototrophic pigment diversity and picophytoplankton abundance in permafrost thaw lakes
Phototrophic pigment diversity and picophytoplankton abundance in permafrost thaw lakes Open
Permafrost thaw lakes (thermokarst lakes) are widely distributed across the northern landscape, and are known to be biogeochemically active sites that emit large amounts of carbon to the atmosphere as CH4 and CO2. However, the abundance an…