USGS divers gather samples on the Thunder Bay Reef complex in July 2024 to assess the abundance of mussels and lakebed algal growth two years before treatment. Photo credit: Madeleine Giordano, USGS.
Madeleine M Giordano (Former Employee)
Science and Products
Cladophora biomass and supporting data collected in the Great Lakes, 2023 (ver. 2.0, April 2025) Cladophora biomass and supporting data collected in the Great Lakes, 2023 (ver. 2.0, April 2025)
Cladophora biomass and supporting data collected in the Great Lakes, 2021 Cladophora biomass and supporting data collected in the Great Lakes, 2021
USGS divers gather samples on the Thunder Bay Reef complex in July 2024 to assess the abundance of mussels and lakebed algal growth two years before treatment. Photo credit: Madeleine Giordano, USGS.
The bottom of Lake Huron as seen by USGS divers (GLSC; Chesterton, Indiana) six meters below the surface. Photo credit: Madeleine Giordano, USGS.
The bottom of Lake Huron as seen by USGS divers (GLSC; Chesterton, Indiana) six meters below the surface. Photo credit: Madeleine Giordano, USGS.
In Lake Erie, a USGS scuba diver swims with a smallmouth bass (Micropterus dolomieu) who is curious about the diver’s algae and mussel collections. Photo credit: Madeleine Giordano, USGS.
In Lake Erie, a USGS scuba diver swims with a smallmouth bass (Micropterus dolomieu) who is curious about the diver’s algae and mussel collections. Photo credit: Madeleine Giordano, USGS.
A USGS Great Lakes Science Center scuba diver peers at a clump of Cladophora algae swaying in the Lake Ontario current. Photo credit: Madeleine Giordano, USGS.
A USGS Great Lakes Science Center scuba diver peers at a clump of Cladophora algae swaying in the Lake Ontario current. Photo credit: Madeleine Giordano, USGS.
USGS scuba diver Madeleine Giordano collects mussels and algae samples from inside her quadrat while the USGS research vessel Stonecat looms above. Photo credit: Megan Lewan, USGS.
USGS scuba diver Madeleine Giordano collects mussels and algae samples from inside her quadrat while the USGS research vessel Stonecat looms above. Photo credit: Megan Lewan, USGS.
Science and Products
Cladophora biomass and supporting data collected in the Great Lakes, 2023 (ver. 2.0, April 2025) Cladophora biomass and supporting data collected in the Great Lakes, 2023 (ver. 2.0, April 2025)
Cladophora biomass and supporting data collected in the Great Lakes, 2021 Cladophora biomass and supporting data collected in the Great Lakes, 2021
USGS divers gather samples on the Thunder Bay Reef complex in July 2024 to assess the abundance of mussels and lakebed algal growth two years before treatment. Photo credit: Madeleine Giordano, USGS.
USGS divers gather samples on the Thunder Bay Reef complex in July 2024 to assess the abundance of mussels and lakebed algal growth two years before treatment. Photo credit: Madeleine Giordano, USGS.
The bottom of Lake Huron as seen by USGS divers (GLSC; Chesterton, Indiana) six meters below the surface. Photo credit: Madeleine Giordano, USGS.
The bottom of Lake Huron as seen by USGS divers (GLSC; Chesterton, Indiana) six meters below the surface. Photo credit: Madeleine Giordano, USGS.
In Lake Erie, a USGS scuba diver swims with a smallmouth bass (Micropterus dolomieu) who is curious about the diver’s algae and mussel collections. Photo credit: Madeleine Giordano, USGS.
In Lake Erie, a USGS scuba diver swims with a smallmouth bass (Micropterus dolomieu) who is curious about the diver’s algae and mussel collections. Photo credit: Madeleine Giordano, USGS.
A USGS Great Lakes Science Center scuba diver peers at a clump of Cladophora algae swaying in the Lake Ontario current. Photo credit: Madeleine Giordano, USGS.
A USGS Great Lakes Science Center scuba diver peers at a clump of Cladophora algae swaying in the Lake Ontario current. Photo credit: Madeleine Giordano, USGS.
USGS scuba diver Madeleine Giordano collects mussels and algae samples from inside her quadrat while the USGS research vessel Stonecat looms above. Photo credit: Megan Lewan, USGS.
USGS scuba diver Madeleine Giordano collects mussels and algae samples from inside her quadrat while the USGS research vessel Stonecat looms above. Photo credit: Megan Lewan, USGS.