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CSMI Lake Huron 2017

1/20

The R/V Lake Guardian docked in Detroit during the Summer Survey. For CSMI Lake Huron, the boat docked in Alpena, Michigan.

2/20

Kit Hastings and Sasha Karatayev don survival suits as part of safety training.

Two people wearing red survival suits on the deck of a large boat. There is an emergency rescue watercraft on deck behind them.

3/20

The CSMI focused on Lake Huron this year. It took about two weeks to collect samples from about 100 sites in Lake Huron, its Northern Channel, and Georgian Bay. Samples from Saginaw Bay were collected by another agency.

A map of Lake Huron, the Northern Channel, Georgian Bay, and Saginaw Bay. Alpena, Michigan is also labeled.

4/20

Collecting a PONAR grab sample of sediment and organisms from the bottom of the lake.

Two people open up a grab sampler into a bucket on the dock of a large boat. Three people are standing behind them.

5/20

Knut Mehler, Kit Hastings, and Allison Neubauer (Illinois-Indiana Sea Grant) wash a benthos sample down in the elutriator and run it through a mesh sleeve to separate the organisms from the sediment.

Two people tilt up a pan with sediment in it while a third person uses a hose to wash the sediment through a hole into a mesh sleeve with a bottle on the end of it. They are working on the deck of a large boat.

6/20

Scientists working around the clock to collect samples from Lake Huron.

Several people work on the back deck of a large boat at twilight.

7/20

Elizabeth Hinchey-Malloy (EPA) and Allison Neubauer (Illinois-Indiana Sea Grant) conducted education and outreach on board by making video calls to classrooms.

A person holds up a bowl of mud while another person points a tablet at it to record an image or video. They are both wearing hard hats and life jackets inside a lab.

8/20

The rosette is used to collect water samples, as well as temperature, conductivity, and chlorophyll levels. No water samples were collected on this cruise, but it was still used to collect a site profile.

Two people stand on the deck of a large boat to prepare a large piece of equipment to be deployed.

9/20

This large rock was the only thing pulled up in one PONAR sample. The site was deemed too rocky for sampling with that method.

10/20

The benthic sled has a camera mounted on the front of it to take videos of a transect on the bottom of the lake. This is a new method to sample dreissenid mussel concentration and coverage, which can be quite patchy, over a long transect.

A person kneels before a metal frame with sled feet on the deck of a large boat. They are turning on lights and adjusting a camera.

11/20

Deploying the benthic sled.

Two people help steady a metal frame as it is lifted off the deck of a large boat by a winch.

12/20

Deploying the benthic sled.

A metal frame with sled feet is lowered into the water.

13/20

Video from the benthic sled is used to estimate the coverage of dreissenid mussels, which can be very patchy, with some areas having even coverage while others have densely-populated pockets. This method may be a better estimate than PONAR sampling.

A still image from a video taken at the bottom of the lake. The tips of two sled feet are visible, as well as the lake bottom of mud with some dreissenid mussels. The sled feet are stirring up mud in plumes.

14/20

Places like the one in this image with uneven bottoms are unsuitable for using the benthic sled.

Image of the screen of a depth finder showing an area with an uneven lake bottom.

15/20

A lighthouse in the Northern Channel of Lake Huron.

A white lighthouse with a red roof on a wooded shoreline by the water.

16/20

Surise or sunset over still water. A few dark clouds are near the horizon.

17/20

Clouds over water at sunrise or sunset. Some of the clouds are grey and others are orange.

18/20

A sunset over water. A bright red sun peaks through a few white clouds.

19/20

Sunrise over water. The sun is a light yellow and the clouds cover half of the sky.

20/20

Sunrise over water. The sky is cloudless but hazy, intense red by the horizon and yellow for much of the sky above that. The sun is bright yellow.

Great Lakes Center

Buffalo State • 1300 Elmwood Ave • Science and Mathematics Complex 319
Buffalo, NY 14222 • Phone: (716) 878-4329 • Fax: (716) 878-6644

greatlakes@buffalostate.edu

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