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Factors and mechanisms driving among-lake variability of mercury concentrations in a benthivorous fish in the canadian subarctic.
Chemosphere
January 2025
Department of Biology, Wilfrid Laurier University, Waterloo, ON, Canada. Electronic address:
Wild-caught fish are an important subsistence food source in remote northern regions, but they can also be a source of exposure to mercury (Hg), which has known health hazards. We investigated factors and mechanisms that control variability of Hg concentrations in Lake Whitefish (Coregonus clupeaformis) among remote subarctic lakes in Northwest Territories, Canada. Integrating variables that reflect fish ecology, in-lake conditions, and catchment attributes, we aimed to not only determine factors that best explain among-lake variability of fish Hg, but also to provide a whole-ecosystem understanding of interactions that drive among-lake variability of fish Hg.
View Article and Find Full Text PDFVariation in Hypertension Control by Race and Ethnicity, and Geography in US Veterans.
J Am Heart Assoc
January 2025
VA HSR Center for the Study of Healthcare Innovation, Implementation & Policy (CSHIIP) VA Greater Los Angeles Healthcare System Los Angeles CA USA.
Background: Hypertension control and related cardiovascular outcomes among Americans remain suboptimal, and differ by race, ethnicity, and geography. Healthcare access is one of multiple critical factors in hypertension control. Understanding the degree to which healthcare access, versus other factors, produce these outcomes can inform policies and interventions to improve cardiovascular outcomes and reduce disparities.
View Article and Find Full Text PDFNatural hybridisation among rare or endangered species and stable congenerics is increasingly topical for the conservation of species-level diversity under anthropogenic impacts. Evidence for beneficial genes being introgressed into or selected for in hybrids raises concurrent questions about its evolutionary significance. In Darwin's tree finches on the island of Floreana (Galapagos Islands, Ecuador), the Critically Endangered medium tree finch () undergoes introgression with the stable small tree finch (), and hybrids regularly backcross with Earlier studies in 2005-2013 documented an increase in the frequency of hybridisation on Floreana using field-based and microsatellite data.
View Article and Find Full Text PDFWidespread geographic distribution of filarioid nematodes in caribou ( sspp.) in Canada.
Int J Parasitol Parasites Wildl
April 2025
Faculty of Veterinary Medicine, University of Calgary, Calgary, Alberta, Canada.
The caribou ( sspp.) is a keystone wildlife species in northern ecosystems that plays a central role in the culture, spirituality and food security of Indigenous People. The Arctic is currently experiencing an unprecedented rate of climate change, including warming temperatures and altered patterns of precipitation.
View Article and Find Full Text PDFEnvironmental Conditions Modulate Warming Effects on Plant Litter Decomposition Globally.
Ecol Lett
January 2025
Climate Impacts Research Centre, Department of Ecology and Environmental Sciences, Umeå University, Umeå, Sweden.
Empirical studies worldwide show that warming has variable effects on plant litter decomposition, leaving the overall impact of climate change on decomposition uncertain. We conducted a meta-analysis of 109 experimental warming studies across seven continents, using natural and standardised plant material, to assess the overarching effect of warming on litter decomposition and identify potential moderating factors. We determined that at least 5.
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