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Linear Unit: Meter (1.000000)
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Great Lakes Nearshore Waters: Cyanobacteria
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<DIV STYLE="text-align:Left;font-size:12pt"><DIV><DIV><P><SPAN>This data was derived as part of the Overall Assessment of the State of Nearshore Waters. Cyanobacteria, a blue-green algae, occurs naturally in freshwater but an overgrowth can result in a harmful algae bloom that can release toxins dangerous to human and ecosystem health. Cyanobacteria is assessed by calculating the extent of cyanobacteria blooms detected within a Regional Unit, using satellite composites. An additional flag is assigned to Regional Units where cyanobacteria is a source of high stress, as it is considered a serious concern. Thresholds for severity are based on World Health Organization guidelines.</SPAN><SPAN> Satellite composites are from the National Oceanic & Atmospheric Association (NOAA) Harmful Algal Bloom Monitoring program.</SPAN></P><P><SPAN>LAKE ERIE: 10-day composite images from the MODIS satellite, with Cyanobacteria Index algorithm applied; June - October, 2012-2017</SPAN></P><P><SPAN>LAKE ONTARIO: 10-day composite images from the MODIS satellite, with Cyanobacteria Index algorithm applied; June - October, 2016-2018</SPAN></P><P><SPAN>LAKE SUPERIOR: 7-day composite images from the </SPAN><SPAN>Sentinel 3A</SPAN><SPAN>satellite, with Cyanobacteria Index algorithm applied; June - October, 2019</SPAN></P><P><SPAN>LAKE HURON: 7</SPAN><SPAN>-day composite images, with Cyanobacteria Index algorithm applied; June - October, </SPAN><SPAN>2019</SPAN></P><P><SPAN>Points represent the Regional Unit centroid.</SPAN></P><P><SPAN>Low Stress: no bloom; High Stress: bloom</SPAN></P></DIV></DIV></DIV>
Great Lakes
Lake Superior
Lake Huron
Lake Erie
Lake Ontario
Nearshore Framework
ecosystem health
water quality
cumulative stress
Nuisance & Harmful Algae
Cyanobacteria
Summary of cyanobacteria blooms detected within each Regional Unit; data is part of the Overall Assessment of the State of Nearshore Waters.
Environment and Climate Change Canada - Strategic Policy Branch - RDGO; National Oceanic & Atmospheric Association (NOAA) Harmful Algal Bloom Monitoring program
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20260427