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endangered species; gene flow; genetic variation; population structure; species dispersal; turtles; Great Lakes; Ontario
Abstract:
... Blanding’s turtle, Emys blandingii, is a globally endangered species with a range centred on the Great Lakes of North America. Several disjunct populations also occur along the East Coast of North America. Previous studies suggest that the Great Lakes portion of the species’ range exhibits panmixia. However, E. blandingii is restricted to relatively small populations in many areas around the Great ...
basins; case studies; fish; liver; models; neoplasms; partridges; probability; rivers; Great Lakes
Abstract:
... Fish tumors and other deformities are a class of Beneficial Use Impairment (BUIs) established by the International Joint Commission to identify Areas of Concern (AOC) in the Great Lakes basin. The St. Marys River has been impaired by fish tumors and other deformities since its designation as an AOC in 1987. In this study, we present a Bayesian modeling framework that is founded upon the explicit c ...
NADP (coenzyme); United States Environmental Protection Agency; United States Geological Survey; active sites; air; atmospheric chemistry; atmospheric precipitation; cluster analysis; emissions; geographical distribution; mercury; monitoring; planning; sulfates; urban areas; watersheds; wet deposition; Great Lakes region; Lake Michigan; Ontario; United States
Abstract:
... As many as 51 mercury (Hg) wet-deposition-monitoring sites from 4 networks were operated in 8 USA states and Ontario, Canada in the North American Great Lakes Region from 1996 to 2010. By 2013, 20 of those sites were no longer in operation and approximately half the geographic area of the Region was represented by a single Hg-monitoring site. In response, a Great Lakes Atmospheric Mercury Monitori ...
Nirmal Uppugundla; Leonardo da Costa Sousa; Shishir PS Chundawat; Xiurong Yu; Blake Simmons; Seema Singh; Xiadi Gao; Rajeev Kumar; Charles E Wyman; Bruce E Dale; Venkatesh Balan
... BACKGROUND: In a biorefinery producing cellulosic biofuels, biomass pretreatment will significantly influence the efficacy of enzymatic hydrolysis and microbial fermentation. Comparison of different biomass pretreatment techniques by studying the impact of pretreatment on downstream operations at industrially relevant conditions and performing comprehensive mass balances will help focus attention ...
Soil and Water Assessment Tool model; agricultural management; algorithms; basins; computer software; ecosystem services; mathematical models; prediction; rivers; watersheds; weather; United States
Abstract:
... Selection of strategies that help reduce riverine inputs requires numerical models that accurately quantify hydrologic processes. While numerous models exist, information on how to evaluate and select the most robust models is limited. Toward this end, we developed a comprehensive approach that helps evaluate watershed models in their ability to simulate flow regimes critical to downstream ecosyst ...
... Mercury (Hg) is a widespread contaminant that has been shown to induce a wide range of adverse health effects in birds including reproductive, physiological and neurological impairments. Here we explored the relationship between blood total Hg concentrations ([THg]) and oxidative stress gene induction in the aquatic piscivorous Double-crested Cormorants (Phalacrocorax auritus) using a non-lethal t ...
air; air temperature; climate; climate change; evaporation; ice; invasive species; lakes; planning; prediction; professionals; risk; risk reduction; storms; water quality; water temperature; Great Lakes
Abstract:
... In order to enhance and protect the resilience of the Great Lakes, predicting future outcomes of climatic changes, particularly in already degraded geographical areas is instrumental to success. These changes include warming air and water temperatures; shifts in the timing, severity and frequency of precipitation events and storms; varying lake levels; and reductions in lake ice cover. Changes to ...
Larus argentatus; Pelecanus erythrorhynchos; Phalacrocorax auritus; Sterna hirundo; breeding; digital images; lakes; monitoring; population; surveys; water birds; Great Lakes; Manitoba
Abstract:
... Regular surveys of waterbird colonies are needed to identify changes in abundance and distribution. Consistent surveys have been maintained in some regions, but one area where updated surveys were needed was southern Manitoba, where Lakes Winnipeg, Winnipegosis and Manitoba had not been jointly surveyed since 1979. In mid-June, 2012, an aerial survey of the region was conducted using digital photo ...
... Adaptations to “thermal time” (=Degree-day) constraints on developmental rates and voltinism for North American tiger swallowtail butterflies involve most life stages, and at higher latitudes include: smaller pupae/adults; larger eggs; oviposition on most nutritious larval host plants; earlier spring adult emergences; faster larval growth and shorter molting durations at lower temperatures. Here w ...
probability; winter; nests; males; breeding; hurricanes; models; habitats; adults; hatching; Charadrius; Falco; chicks; body condition; females; Great Lakes; United States; Great Lakes region
Abstract:
... Juvenile survival and age at first breeding (i.e. recruitment) are critical parameters affecting population dynamics in birds, but high levels of natal dispersal preclude measurement of these variables in most species. We used multi‐state capture–recapture models to measure age‐specific survival and recruitment probabilities of piping plovers Charadrius melodus in the Great Lakes region during 199 ...
basins; ecosystems; forests; gauges; habitats; islands; life history; monitoring; national parks; organic horizons; overstory; pollination; species diversity; understory; woody plants; Great Lakes; United States
Abstract:
... Measures of forest integrity often focus on only one or a small number of metrics (e.g., regeneration, soil organic layer depth). It is possible, however, to view forest integrity more holistically, using the species assemblages present as phytometers, or integrative measures of the complete set of drivers, stressors, and filters acting on the ecosystem. Thus, the species themselves express forest ...
... This perspective describes the major natural and anthropogenic forces driving change in the abundance and quality of fish habitats in the Huron-Erie Corridor (HEC), the Great Lakes connecting channel comprised of the St. Clair River, the Lake St. Clair, and the Detroit River. Channels connecting the Laurentian Great Lakes discharge large volumes of water equal to or greater than most other large r ...
drought; fire behavior; fire hazard; fire season; fire weather; forests; fuels; meteorological data; professionals; Great Lakes; Great Lakes region; United States
Abstract:
... A web-based set of tools has been developed to integrate weather, fire danger and fire behaviour information for the Great Lakes region of the United States. Weather parameters obtained from selected observational networks are combined with operational high-resolution gridded analyses and forecast products from the United States National Weather Service. Fuel moisture codes and fire behaviour indi ...
Michael D. Kahl; Daniel L. Villeneuve; Kyle Stevens; Anthony Schroeder; Elizabeth A. Makynen; Carlie A. LaLone; Kathleen M. Jensen; Meagan Hughes; Bruce A. Holmen; Evan Eid; Elizabeth J. Durhan; Jenna E. Cavallin; Jason Berninger; Gerald T. Ankley
risk; metabolism; monitoring; wastewater treatment; pollutants; genes; fish; Pimephales promelas; gene expression regulation; habitats; cages; adults; Great Lakes; United States
Abstract:
... Assessment of potential risks of complex contaminant mixtures in the environment requires integrated chemical and biological approaches. In support of the US Great Lakes Restoration Initiative, the US Environmental Protection Agency lab in Duluth, MN, is developing these types of methods for assessing possible risks of aquatic contaminants in near‐shore Great Lakes (USA) sites. One component invol ...
... Petroleum hydrocarbon spills in aquatic environments are among the worst ecological disasters resultant of global trade and commerce. History has shown that despite taking measures to minimize their frequency, large spills still occur. Crude oil spilled in aquatic environments poses a significant threat to aquatic life, as toxic effects cascade across trophic levels, affecting phytoplankton, zoopl ...
aquatic ecosystems; biodiversity; climate change; eutrophication; forests; international agreements; invasive species; minerals; oils; overfishing; pollution; shipping; water quality; Great Lakes
Abstract:
... Historically, international environmental agreements on shared transboundary waters have dealt with exploitation of natural resources like oil, minerals, forests, fisheries, shipping and trade. Presently the focus is on environmental issues relevant to conservation, restoration, protection, sustainability over-fishing, pollution, invasive species and climate change. Global assessment indicates a l ...
climate change; lakes; storms; summer; time series analysis; winter; Great Lakes
Abstract:
... This study disentangles causes of the Michigan-Huron system lake-level variability. Regional precipitation is identified as the primary driver of lake levels with sub-monthly time lag, implying that the lake-level time series can be used as a proxy for regional precipitation throughout most of the 1865–present instrumental record. Aside from secular variations associated with the Atlantic Multidec ...
... Quantitative assessment of bacterial pathogens, their geographic variability, and distribution in various matrices at Great Lakes beaches are limited. Quantitative PCR (qPCR) was used to test for genes from E. coli O157:H7 (eaeO₁₅₇), shiga-toxin producing E. coli (stx2), Campylobacter jejuni (mapA), Shigella spp. (ipaH), and a Salmonella enterica-specific (SE) DNA sequence at seven Great Lakes bea ...
Enterococcus; Escherichia coli; algae; beaches; coliform bacteria; epidemiology; freshwater; habitats; health promotion; human health; indicator species; limnology; metagenomics; meteorology; molecular models; monitoring; risk; sand; soil; surface water; water quality; water quality standards; Great Lakes
Abstract:
... Monitoring beach waters for human health has led to an increase and evolution of science in the Great Lakes, which includes microbiology, limnology, hydrology, meteorology, epidemiology, and metagenomics, among others. In recent years, concerns over the accuracy of water quality standards at protecting human health have led to a significant interest in understanding the risk associated with water ...
... Sea lampreys (Petromyzon marinus L., 1758) invaded the Great Lakes early in the 20th century and have caused economic and ecological damage to native fish species. The integrated sea lamprey control program involves low-head barrier dams, lampricides, and trapping. The search for low cost and less toxic alternatives to lampricides could involve the use of repellents in the form of chemical alarm c ...