Andrew Medeiros

Assistant Professor

Office: Ross Building, N411
Phone: 416-736-2100 Ext: 22763
Emailfraggle@yorku.ca
Primary websitewww.andrewmedeiros.com
Secondary websitewww.inuk.ca

Professor Medeiros is an expert in freshwater ecology, biogeochemical processes, and Arctic environments. His research focuses on the use of biological, hydrological, and geochemical indicators to examine responses to environmental change in northern ecosystems; past, present, and future. This is applied through the examination of gradients of ecological condition (e.g., climate change, ecological sustainability, anthropogenic disturbance) over large spatial and temporal scales. His research on the evolution of northern ecosystems over the past 10,000 years allows for predictions and modeling of future responses to environmental change.

Area of Specialization

Arctic Ecology

Degrees

PhD, York University
MES, York University
BSc Hon, First Class, Brock University


Research Interests

Global/Climate Change , Geography , Biogeochemistry, Paleoecology, Arctic Environments

Selected Publications

Medeiros, A. S., Gajewski, K., Porinchu, D. F., Vermaire, J. C., & Wolfe, B. B. (2015) . Detecting the influence of secondary environmental gradients on chironomid-inferred paleotemperature reconstructions in northern North America. Quaternary Science Reviews, 124: 265-274.

Fortin, M. C., Medeiros, A. S., Gajewski, K., Barley, E. M., Larocque-Tobler, I., Porinchu, D. F., & Wilson, S. E. (2015) . Chironomid-environment relations in northern North America. Journal of Paleolimnology, 54:223-237.

Vinke, K., Medeiros, A. S., & Giberson, D. J. (2015) . Diversity patterns in subarctic stream benthic invertebrate assemblages from the Sahtu Settlement Area, Northwest Territories, Canada. Arctic Science, 1:9-25.

Medeiros, A. S., Taylor, D. J., Couse, M., Hall, R. I., Quinlan, R., & Wolfe, B. B. (2014) . Biological and nutrient responses to catchment disturbance and warming in small lakes near the Alaskan tundra–taiga boundary. The Holocene, 24:1308-1319.

Medeiros, A. S., Friel, C. E., Finkelstein, S. A., & Quinlan, R. (2012) . A high resolution multi-proxy record of pronounced recent environmental change at Baker Lake, Nunavut. Journal of paleolimnology, 47:661-676.

Medeiros, A. S., & Quinlan, R. (2011) . The distribution of the Chironomidae (Insecta: Diptera) along multiple environmental gradients in lakes and ponds of the eastern Canadian Arctic. Canadian journal of fisheries and aquatic sciences, 68:1511-1527.

Current Research Projects

Water Security for Northern Peoples: threats to the quantity and quality of northern freshwater systems

Summary: 
Positive water balances in northern regions are an essential component for a multitude of ecosystem services, as well as for access to clean and available freshwater for northern peoples. This project seeks to bridge work in physical and human geography, to understand the impact of environmental change on water quantity and quality in the Arctic, and to develop locally supported, sustainable political and social systems to maintain water security.

Description: 
The consequences of polar amplification of warming include a longer ice-free season leading to increased evaporative stress on lakes, and reductions in winter precipitation that can lead to reduced snowmelt contributions to lakes and rivers. Water quality is also a fundamental concern due to exponential growth of northern communities, and resource development activity intensifies. The confluence of climate change and development pressures has led to several northern communities voicing strong concerns over the sustainability of local fisheries as well as identifying looming water crises. Since water governance systems in northern Canada are under rapid evolution, we examine key vulnerabilities from both a human-centered perspective, as well as the biophysical evolution of freshwater systems in response to a warming climate. This requires working in partnership with indigenous peoples, and incorporating indigenous knowledge and governance structures directly into the research plan.

Project Type: Funded
Role: Principal Investigator


Start Date:  Month: Aug  Year: 2014
Collaborator: Patricia Wood
Collaborator Institution: York University
Collaborator Role: Principal Investigator

Selected Publications

Medeiros, A. S., Gajewski, K., Porinchu, D. F., Vermaire, J. C., & Wolfe, B. B. (2015) . Detecting the influence of secondary environmental gradients on chironomid-inferred paleotemperature reconstructions in northern North America. Quaternary Science Reviews, 124: 265-274.

Fortin, M. C., Medeiros, A. S., Gajewski, K., Barley, E. M., Larocque-Tobler, I., Porinchu, D. F., & Wilson, S. E. (2015) . Chironomid-environment relations in northern North America. Journal of Paleolimnology, 54:223-237.

Vinke, K., Medeiros, A. S., & Giberson, D. J. (2015) . Diversity patterns in subarctic stream benthic invertebrate assemblages from the Sahtu Settlement Area, Northwest Territories, Canada. Arctic Science, 1:9-25.

Medeiros, A. S., Taylor, D. J., Couse, M., Hall, R. I., Quinlan, R., & Wolfe, B. B. (2014) . Biological and nutrient responses to catchment disturbance and warming in small lakes near the Alaskan tundra–taiga boundary. The Holocene, 24:1308-1319.

Medeiros, A. S., Friel, C. E., Finkelstein, S. A., & Quinlan, R. (2012) . A high resolution multi-proxy record of pronounced recent environmental change at Baker Lake, Nunavut. Journal of paleolimnology, 47:661-676.

Medeiros, A. S., & Quinlan, R. (2011) . The distribution of the Chironomidae (Insecta: Diptera) along multiple environmental gradients in lakes and ponds of the eastern Canadian Arctic. Canadian journal of fisheries and aquatic sciences, 68:1511-1527.

All Publications

Journal Articles

Medeiros, A. S., Gajewski, K., Porinchu, D. F., Vermaire, J. C., & Wolfe, B. B. (2015) . Detecting the influence of secondary environmental gradients on chironomid-inferred paleotemperature reconstructions in northern North America. Quaternary Science Reviews, 124: 265-274.

Fortin, M. C., Medeiros, A. S., Gajewski, K., Barley, E. M., Larocque-Tobler, I., Porinchu, D. F., & Wilson, S. E. (2015) . Chironomid-environment relations in northern North America. Journal of Paleolimnology, 54:223-237.

Vinke, K., Medeiros, A. S., & Giberson, D. J. (2015) . Diversity patterns in subarctic stream benthic invertebrate assemblages from the Sahtu Settlement Area, Northwest Territories, Canada. Arctic Science, 1:9-25.

Taylor, D. J., Ballinger, M. J., Medeiros, A. S., & Kotov, A. A. (2015) . Climate‐associated tundra thaw pond formation and range expansion of boreal zooplankton predators. Ecography.

MacDonald, L. A., Farquharson, N., Merritt, G., Fooks, S., Medeiros, A. S., Hall, R. I., ... & Sweetman, J. N. (2015) . Limnological regime shifts caused by climate warming and Lesser Snow Goose population expansion in the western Hudson Bay Lowlands (Manitoba, Canada). Ecology and evolution, 5:921-939.

Medeiros, A. S., Taylor, D. J., Couse, M., Hall, R. I., Quinlan, R., & Wolfe, B. B. (2014) . Biological and nutrient responses to catchment disturbance and warming in small lakes near the Alaskan tundra–taiga boundary. The Holocene, 24:1308-1319.

Bouchard, F., K. W. Turner, L. A. MacDonald, C. Deakin, H. White, N. Farquharson, A. S. Medeiros et al. (2013) Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low. Geophysical Research Letters, 40:6112-6117.

Medeiros, A. S., Biastoch, R. G., Luszczek, C. E., Wang, X. A., Muir, D. C., & Quinlan, R. (2012) . Patterns in the limnology of lakes and ponds across multiple local and regional environmental gradients in the eastern Canadian Arctic. Inland Waters, 2:59-76.

Medeiros, A. S., Friel, C. E., Finkelstein, S. A., & Quinlan, R. (2012) . A high resolution multi-proxy record of pronounced recent environmental change at Baker Lake, Nunavut. Journal of paleolimnology, 47:661-676.

Medeiros, A. S., & Drezner, T. D. (2012) . Vegetation, climate, and soil relationships across the Sonoran Desert. Ecoscience, 19:148-160.

Medeiros, A. S., & Quinlan, R. (2011) . The distribution of the Chironomidae (Insecta: Diptera) along multiple environmental gradients in lakes and ponds of the eastern Canadian Arctic. Canadian journal of fisheries and aquatic sciences, 68:1511-1527.

Medeiros, A. S., Luszczek, C. E., Shirley, J., & Quinlan, R. (2011) . Benthic biomonitoring in arctic tundra streams: A community-based approach in Iqaluit, Nunavut, Canada. Arctic 64:59-72.

Medeiros, A. S., & Molot, L. A. (2006) . Trends in iron and phosphorus loading to Lake Ontario from waste water treatment plants in Hamilton and Toronto. Journal of Great Lakes Research, 32:788-797.

Book Reviews

Medeiros AS. 2012. Review: Changing cold environments, a Canadian perspective. Canadian Geographer, 56(4):e7-e8.

Approach To Teaching

    2015:
  • GEOG 4200: Water Quality and Stream Ecosystems
  • GEOG 2500: Vegetation and Soils
  • GEOG 3200: Terrestrial Ecology
  • GEOG 3700: Disaster! Earth’s Extreme Natural Events
  • GEOG 3900: Physical Geography of the City (Urban Ecology)
  • GEOG 3500: Biogeography
    2014:
  • GEOG 2420: Statistical Analysis in Geography
  • GEOG 4400: Physical Hydrology and Water Resources



Professor Medeiros is an expert in freshwater ecology, biogeochemical processes, and Arctic environments. His research focuses on the use of biological, hydrological, and geochemical indicators to examine responses to environmental change in northern ecosystems; past, present, and future. This is applied through the examination of gradients of ecological condition (e.g., climate change, ecological sustainability, anthropogenic disturbance) over large spatial and temporal scales. His research on the evolution of northern ecosystems over the past 10,000 years allows for predictions and modeling of future responses to environmental change.

Area of Specialization

Arctic Ecology

Degrees

PhD, York University
MES, York University
BSc Hon, First Class, Brock University

Research Interests:

Global/Climate Change , Geography , Biogeochemistry, Paleoecology, Arctic Environments

Current Research Projects

Water Security for Northern Peoples: threats to the quantity and quality of northern freshwater systems

Summary: 
Positive water balances in northern regions are an essential component for a multitude of ecosystem services, as well as for access to clean and available freshwater for northern peoples. This project seeks to bridge work in physical and human geography, to understand the impact of environmental change on water quantity and quality in the Arctic, and to develop locally supported, sustainable political and social systems to maintain water security.

Description: 
The consequences of polar amplification of warming include a longer ice-free season leading to increased evaporative stress on lakes, and reductions in winter precipitation that can lead to reduced snowmelt contributions to lakes and rivers. Water quality is also a fundamental concern due to exponential growth of northern communities, and resource development activity intensifies. The confluence of climate change and development pressures has led to several northern communities voicing strong concerns over the sustainability of local fisheries as well as identifying looming water crises. Since water governance systems in northern Canada are under rapid evolution, we examine key vulnerabilities from both a human-centered perspective, as well as the biophysical evolution of freshwater systems in response to a warming climate. This requires working in partnership with indigenous peoples, and incorporating indigenous knowledge and governance structures directly into the research plan.

Project Type: Funded
Role: Principal Investigator


Start Date:  Month: Aug  Year: 2014
Collaborator: Patricia Wood
Collaborator Institution: York University
Collaborator Role: Principal Investigator

All Publications

Journal Articles

Medeiros, A. S., Gajewski, K., Porinchu, D. F., Vermaire, J. C., & Wolfe, B. B. (2015) . Detecting the influence of secondary environmental gradients on chironomid-inferred paleotemperature reconstructions in northern North America. Quaternary Science Reviews, 124: 265-274.

Fortin, M. C., Medeiros, A. S., Gajewski, K., Barley, E. M., Larocque-Tobler, I., Porinchu, D. F., & Wilson, S. E. (2015) . Chironomid-environment relations in northern North America. Journal of Paleolimnology, 54:223-237.

Vinke, K., Medeiros, A. S., & Giberson, D. J. (2015) . Diversity patterns in subarctic stream benthic invertebrate assemblages from the Sahtu Settlement Area, Northwest Territories, Canada. Arctic Science, 1:9-25.

Taylor, D. J., Ballinger, M. J., Medeiros, A. S., & Kotov, A. A. (2015) . Climate‐associated tundra thaw pond formation and range expansion of boreal zooplankton predators. Ecography.

MacDonald, L. A., Farquharson, N., Merritt, G., Fooks, S., Medeiros, A. S., Hall, R. I., ... & Sweetman, J. N. (2015) . Limnological regime shifts caused by climate warming and Lesser Snow Goose population expansion in the western Hudson Bay Lowlands (Manitoba, Canada). Ecology and evolution, 5:921-939.

Medeiros, A. S., Taylor, D. J., Couse, M., Hall, R. I., Quinlan, R., & Wolfe, B. B. (2014) . Biological and nutrient responses to catchment disturbance and warming in small lakes near the Alaskan tundra–taiga boundary. The Holocene, 24:1308-1319.

Bouchard, F., K. W. Turner, L. A. MacDonald, C. Deakin, H. White, N. Farquharson, A. S. Medeiros et al. (2013) Vulnerability of shallow subarctic lakes to evaporate and desiccate when snowmelt runoff is low. Geophysical Research Letters, 40:6112-6117.

Medeiros, A. S., Biastoch, R. G., Luszczek, C. E., Wang, X. A., Muir, D. C., & Quinlan, R. (2012) . Patterns in the limnology of lakes and ponds across multiple local and regional environmental gradients in the eastern Canadian Arctic. Inland Waters, 2:59-76.

Medeiros, A. S., Friel, C. E., Finkelstein, S. A., & Quinlan, R. (2012) . A high resolution multi-proxy record of pronounced recent environmental change at Baker Lake, Nunavut. Journal of paleolimnology, 47:661-676.

Medeiros, A. S., & Drezner, T. D. (2012) . Vegetation, climate, and soil relationships across the Sonoran Desert. Ecoscience, 19:148-160.

Medeiros, A. S., & Quinlan, R. (2011) . The distribution of the Chironomidae (Insecta: Diptera) along multiple environmental gradients in lakes and ponds of the eastern Canadian Arctic. Canadian journal of fisheries and aquatic sciences, 68:1511-1527.

Medeiros, A. S., Luszczek, C. E., Shirley, J., & Quinlan, R. (2011) . Benthic biomonitoring in arctic tundra streams: A community-based approach in Iqaluit, Nunavut, Canada. Arctic 64:59-72.

Medeiros, A. S., & Molot, L. A. (2006) . Trends in iron and phosphorus loading to Lake Ontario from waste water treatment plants in Hamilton and Toronto. Journal of Great Lakes Research, 32:788-797.

Book Reviews

Medeiros AS. 2012. Review: Changing cold environments, a Canadian perspective. Canadian Geographer, 56(4):e7-e8.


Teaching:

Approach To Teaching

    2015:
  • GEOG 4200: Water Quality and Stream Ecosystems
  • GEOG 2500: Vegetation and Soils
  • GEOG 3200: Terrestrial Ecology
  • GEOG 3700: Disaster! Earth’s Extreme Natural Events
  • GEOG 3900: Physical Geography of the City (Urban Ecology)
  • GEOG 3500: Biogeography
    2014:
  • GEOG 2420: Statistical Analysis in Geography
  • GEOG 4400: Physical Hydrology and Water Resources