James Larson
James Larson
Science and Products
Cyanobacteria: Harmful Algae Blooms
Cyanobacteria (a.k.a. blue-green algae) are photosynthetic bacteria that occur in a wide array of terrestrial and aquatic habitats. In freshwaters, cyanobacteria sometimes form extremely dense populations that are termed blooms or harmful algal blooms (HABs). When forming blooms, cyanobacteria cause a variety of environmental issues, but one of the most important is the production of compounds (i...
Prey Assemblage in Response to Stamp Sands Intrusion
Between 1902 and 1932, it is estimated that 22.7 million metric tons of copper-rich rock were processed in mills near Gay, MI, near Lake Superior. Waste rock from this process (so-called stamp sands) was deposited into a pile adjacent to the Lake Superior beach. Since 1932, these stamp sands have eroded from the original pile and along the shoreline to the south and west (Kerfoot et al. 2021)...
Nutrient Dynamics in Great Lake Tributaries
Harmful algae blooms can produce cyanotoxins that are harmful to humans, pets, livestock, and ecosystem health. Harmful algae blooms are a frequent occurrence in the Great Lakes, particularly in Lake Erie and Lake Michigan at the mouths of the Maumee and Fox Rivers and are partially caused by an excess of nutrients such as nitrogen and phosphorous in the water column.
Using Water Level Management to Reduce Harmful Algae Bloom Toxicity
Cyanotoxin concentrations that exceed World Health Organization’s drinking water guidance were observed in ~50% of samples taken during bloom events at Lake Kabetogama in Voyagers National Park. Lake Kabetogama is part of a large lake complex that includes other connected lakes, outflows of which are regulated by man-made dams. Here, we are exploring whether dam management could influence the...
Science and Products
Cyanobacteria: Harmful Algae Blooms
Cyanobacteria (a.k.a. blue-green algae) are photosynthetic bacteria that occur in a wide array of terrestrial and aquatic habitats. In freshwaters, cyanobacteria sometimes form extremely dense populations that are termed blooms or harmful algal blooms (HABs). When forming blooms, cyanobacteria cause a variety of environmental issues, but one of the most important is the production of compounds (i...
Prey Assemblage in Response to Stamp Sands Intrusion
Between 1902 and 1932, it is estimated that 22.7 million metric tons of copper-rich rock were processed in mills near Gay, MI, near Lake Superior. Waste rock from this process (so-called stamp sands) was deposited into a pile adjacent to the Lake Superior beach. Since 1932, these stamp sands have eroded from the original pile and along the shoreline to the south and west (Kerfoot et al. 2021)...
Nutrient Dynamics in Great Lake Tributaries
Harmful algae blooms can produce cyanotoxins that are harmful to humans, pets, livestock, and ecosystem health. Harmful algae blooms are a frequent occurrence in the Great Lakes, particularly in Lake Erie and Lake Michigan at the mouths of the Maumee and Fox Rivers and are partially caused by an excess of nutrients such as nitrogen and phosphorous in the water column.
Using Water Level Management to Reduce Harmful Algae Bloom Toxicity
Cyanotoxin concentrations that exceed World Health Organization’s drinking water guidance were observed in ~50% of samples taken during bloom events at Lake Kabetogama in Voyagers National Park. Lake Kabetogama is part of a large lake complex that includes other connected lakes, outflows of which are regulated by man-made dams. Here, we are exploring whether dam management could influence the...