A5107141563- Aquatic Ecosystems and Phytoplankton Dynamics
- Marine and coastal ecosystems
- Fish Ecology and Management Studies
- Soil and Water Nutrient Dynamics
- Water Quality and Pollution Assessment
- Geology and Paleoclimatology Research
- Aquatic Invertebrate Ecology and Behavior
- Environmental DNA in Biodiversity Studies
- Microbial Community Ecology and Physiology
- Coastal wetland ecosystem dynamics
- Isotope Analysis in Ecology
- Hydrology and Watershed Management Studies
- Hydrology and Sediment Transport Processes
- Water Quality Monitoring Technologies
- Oceanographic and Atmospheric Processes
- Marine and fisheries research
- Coastal and Marine Dynamics
- Remote Sensing and LiDAR Applications
Environment and Climate Change Canada
2011-2025
Bangor University
2007
Lake Winnipeg has experienced dramatic increases in nutrient loading and phytoplankton biomass over the last few decades, accompanied by a marked shift community composition towards dominance of cyanobacteria. Comprehensive lake-wide observations algal blooms are critical to assessing lake's health status, its response management practices, an improved understanding processes driving blooms. We present analysis spatial temporal variability on using satellite-derived chlorophyll indices for...
Abstract Water clarity in North America's Laurentian Great Lakes has undergone considerable change over the last several decades as a consequence of invasive species, eutrophication, and implemented nutrient management practices. Satellite observations from CZCS, SeaWiFS, MODIS‐Aqua sensors have been used tandem with long term records Secchi disk depth ( Z SD ) to provide retrospective analysis spatial temporal variations water Lakes. A simple empirical algorithm is presented, relating...
Mid-winter limnological surveys of Lake Erie captured extremes in ice extent ranging from expansive cover 2010 and 2011 to nearly ice-free waters 2012. Consistent with a warming climate, on the Great Lakes is decline, thus condition encountered may foreshadow lakes future winter state. Here, we show that pronounced changes annual are accompanied by equally important shifts phytoplankton bacterial community structure. Expansive supported blooms filamentous diatoms. By comparison, free...
Early detection and comprehensive monitoring of inland water algal blooms is fundamental to their effective management mitigation potential ecosystem public health impacts. With the spatial temporal limitations in situ sampling, bloom capabilities have been enhanced greatly by advancements satellite Earth Observation (EO). Three turbid, eutrophic Canadian lakes (Lake Winnipeg (LW); Lake Erie (LE); Woods (LoW)) focus Environment Climate Change Canada (ECCC) research initiatives due concerns...
The MERIS (MEdium Resolution Imaging Spectrometer) maximum chlorophyll index was applied to Lake of the Woods, an inland water body under significant quality pressure from recurring cyanobacteria blooms, in order address commonly raised concern that blooms on lake have increased recently. Recent trends bloom characteristics (intensity, timing and aerial extent) were analysed relation local climate variables, offering important new insights into mechanisms driving algal occurrences lake.
Since the early 2000s Lake Erie has seen a dramatic increase in phytoplankton biomass, manifested particular by rise severity of cyanobacteria blooms and prevalence potentially toxic taxa such as Microcystis. Satellite remote sensing provided unique capacity for synoptic detection these blooms, enabling spatial temporal trends their extent to be documented. Algorithms satellite algal often rely on single consistent relationship between or cyanobacterial biomass spectral indices Maximum...
In this study, we simulate three-dimensional transport of algal blooms in Lake Erie using a combination remote sensing and hydrodynamic modelling. The algorithms use data from the Sentinel-3 OLCI satellite sensor to derive chlorophyll-a concentration cyanobacteria Erie. derived initializes an bloom model driven by lake component Water Cycle Prediction System for Great Lakes, system coupled atmosphere-lake-hydrological models operated out Environment Climate Change Canada. is modelled as...
Despite significant declines in external phosphorus loads, Lake of the Woods continues to experience severe recurring cyanobacterial harmful algal blooms (cHABs) covering as much 80% lake surface area. Satellite-derived bloom indices were used assess status, trends, and drivers cHAB conditions for period 2002 2021 support developing ecosystem objectives response indicators lake. Areas greatest potential concern, with most prolonged occurrences, southeast Significant decreases suggest may now...
Recent observations have confirmed the presence of dense accumulations diatom Aulacoseira islandica within surface lake ice on Lake Erie. MERIS (Medium Resolution Imaging Spectrometer) full-resolution satellite imagery is shown to clearly distinguish optical signature these phytoplankton blooms. The Level 1 maximum chlorophyll index applied Erie under winter, partially (>50%) ice-covered conditions, demonstrating for first time potential detection blooms within, or surrounding, ice.