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Environmental pollutants can cause genetic damage to wildlife, which can have impacts at the population level. Thus, identifying chemicals and complex mixtures that can cause genetic damage and monitoring their effects in exposed wildlife populations is an important component of chemical and ecological risk assessment and management. This project will apply modern methods in molecular biology to develop tools for measuring genetic damage in cultured cells, laboratory animals, and wild species. These tools will be used to screen large numbers of chemicals for potential genotoxicity in the laboratory, and to monitor the genetic health of wildlife species in polluted areas.
This dataset includes all significant new activity (SNAc) orders and notices published under the authority of the Canadian Environmental Protection Act, 1999 (CEPA). The SNAc provisions of CEPA may be applied to a substance or living organism when Environment and Climate Change Canada and Health Canada suspect that a significant new activity in relation to the substance or living organism may pose new or increased risks to the environment or to human health. Information is organized by substance and includes links to relevant Canada Gazette publications. Confidential accession numbers and masked names have been presented for confidential substances. Although great care has been taken to ensure the information herein accurately reflects the requirements prescribed in CEPA, you are advised that, should any inconsistencies be found, the legal documents, published in the Canada Gazette, will prevail. Please note that substances on the Domestic Substances List (DSL) may be presented with a flag next to the substance identification number in official Canada Gazette publications. These flags are included in a separate column in the dataset, and are as follows: S: The “S” flag indicates that the SNAc provisions of CEPA apply to the substance. S': The “S'” (S prime) flag indicates that the SNAc provisions of CEPA apply to a substance that was already listed on the DSL. P: The “P” flag indicates that the substance was assessed and added to the DSL on the basis that it met the Reduced Regulatory Requirement polymer criteria. T: The “T” flag indicates that the substance was manufactured or imported during the transitional period (January 1, 1987 to July 1, 1994). N: The “N” flag indicates that the substance was manufactured or imported after July 1, 1994.
Categorization was required by the Canadian Environmental Protection Act, 1999 (CEPA 1999) and is a first step to finding out which of these chemical substances require further attention in the form of assessment, research and/or measures to control their use or release. This task was completed by September 2006, as required by the act. Using information from Canadian industry, academic research and other countries, Government of Canada scientists worked with partners in applying a set of rigorous tools to the 23,000 chemical substances on the Domestic Substances List (DSL). They were categorized to identify those that were: • Inherently toxic to humans or to the environment and that might be: o Persistent (take a very long time to break down), and/or o Bioaccumulative (collect in living organisms and end up in the food chain) • Substances to which people might have greatest potential for exposure. Through categorization, the Government of Canada identified approximately 4,000 of the 23,000 chemical substances on the DSL as meeting the criteria for further attention.
This dataset includes all ministerial condition (MC) notices published under the authority of the Canadian Environmental Protection Act, 1999 (CEPA). The MC notice may be applied to a new substance or living organisms when Environment and Climate Change Canada and Health Canada suspect that a new substance may meet the criterial for toxic under CEPA. When Ministerial conditions are imposed, the notifier can manufacture or import the substance, subject to restrictions. The notifier and, if specified in the condition, the notifier’s customers are obliged to abide by these conditions and keep records as indicated. Substances subject to ministerial conditions are not eligible for addition to the Domestic Substances List. Therefore, any new notifier who wishes to manufacture or import the same substance must submit a New Substances Notification. This may result in similar conditions being imposed. Information is organized by substance and includes links to relevant Canada Gazette publications. Confidential accession numbers and masked names have been presented for confidential substances. Although great care has been taken to ensure the information herein accurately reflects the requirements prescribed in CEPA, you are advised that, should any inconsistencies be found, the legal documents, published in the Canada Gazette, will prevail.
The transition from tadpole to frog (metamorphosis) and gender differentiation are tightly controlled by the endocrine systems and hormones, where exposure to even low concentrations of certain environmental contaminants can change normal hormone processes that have severe effects on biological development and thus the production of healthy, reproductively capable individuals. We will assess the effects of potential endocrine disrupting CMP3 priority substances, where tadpoles are exposed to environmentally relevant concentrations in water or sediment and assessed for effects on time to metamorphosis, growth, gender, expression of genes involved in development and sexual differentiation and histology of thyroid and gonadal tissue.
The health of individual amphibians, amphibian populations, and their wetland habitats are monitored in the oil sands region and at reference locations. Contaminants assessments are done at all sites. Amphibians developing near oil sands activities may be exposed to concentrations of oil sands-related contaminants, through air emissions as well as water contamination. The focus of field investigations is to evaluate the health of wild amphibian populations at varying distances from oil sands operations. Wood frog (Lithobates sylvaticus) populations are being studied in Alberta, Saskatchewan and the Northwest Territories in order to examine the relationship of proximity to oil sands activities and to prevalence of infectious diseases, malformation rates, endocrine and stress responses, genotoxicity, and concentrations of heavy metals, naphthenic acids and polycyclic aromatic hydrocarbons.
In recent years, neonicotinoid use has been linked to collapses of honey bee colonies; however, relatively little is known about their impacts on vertebrate wildlife. Amphibians in particular are excellent vertebrate bioindicator organisms because they are sensitive to environmental stressors and their dual aquatic/terrestrial life cycle may leave them more vulnerable to neonicotinoid exposure. Our preliminary work suggests wood frogs (Lithobates sylvaticus) are sensitive to environmentally relevant concentrations of neonicotinoids. Our proposed project builds on our previous studies and is two-fold: 1) to examine the direct effects of neonicotinoids on frogs using laboratory and mesocosm exposures and, 2) to determine the concentrations of neonicotinoids in the environment using sensitive time-integrating samplers (POCIS) and assess the effects of neonicotinoids on amphipods exposed in situ.
The Canadian Environmental Sustainability Indicators (CESI) program provides data and information to track Canada's performance on key environmental sustainability issues. The Air health trends indicators were developed as a tool to monitor trends in public health impacts in Canada attributable to short-term exposure to 2 major outdoor air pollutants: ground-level ozone (O3) and fine particulate matter (PM2.5). Specifically, the indicators estimate over time the change in the percentage of all deaths, excluding those from injuries, and hospitalizations that can be attributed to exposure to O3 and PM2.5. Exposure to these air pollutants can lead to chronic lung disease, heart attacks, strokes, and mortality. These adverse health effects contribute to economic costs through lost productivity, additional visits to doctors’ offices and hospitals, and burden on the health care system. They also influence overall well-being when individuals and families must deal with illness and death. Information is provided to Canadians in a number of formats including: static and interactive maps, charts and graphs, HTML and CSV data tables and downloadable reports. See the supplementary documentation for the data sources and details on how the data were collected and how the indicator was calculated. Canadian Environmental Sustainability Indicators: https://www.canada.ca/environmental-indicators
The objective of this research is to examine the effects that the direct application of pesticides to control aquatic invasive plants has on non-target organisms. The research will focus on the active ingredient diquat, a currently registered pesticide in Canada used to control submerged plant species. A mesocosm (i.e. artificial pond) experimental approach will be used to examine the effects of diquat on aquatic organisms, including native and invasive plants, invertebrates and vertebrates that are representative of, and important to, Canadian aquatic ecosystems.
The Government of Canada leads or supports a variety of initiatives that involve monitoring, assessing or managing cumulative effects. This record contains information about cumulative effects initiatives that are taking place across Canada. 16 federal departments and agencies that are involved in cumulative effects and related work were surveyed and 388 initiatives were collected. Each entry includes: • a description of the initiative • information about its location, partners involved, relevant industries, and overarching or related initiatives • links to further information or related Open Data sources