the bold

Lake Guardian: Shipboard and Shoreline Science Workshop Day 1 Wrap Up!

By Dr. Joel Hoffman

In July 2011, scientists and educators from around the Great Lakes will be aboard EPA’s Lake Guardian research vessel to research environmental conditions in Lake Superior, and share their stories.

Science Workshop, Day#1 Wrap up

Wednesday we officially kicked-off the science education workshop on the Lake Guardian Research Vessel! Our educators arrived by plane and car from across the Great Lakes – New York to Minnesota. For those who have not been on a large lake or to sea on a large research vessel, it’s hard to describe your first impression. You enter the R/V Lake Guardian from the back deck, walking a gang plank from the shore on to the working portion of the vessel. A massive, black steel tower, called an A-frame, and a number of large cables and winches, take up the better portion of your view. These are the mechanical systems used to lower various sampling gears hundreds or thousands of feet down into the lake. You can’t see the front of the boat. The three decks stretch to the sky, over the top of which you can see the diesel stacks. There is a constant hum and vibration when you stop onboard. This is the sound of the engine idling, providing power to the ship.

After settling in, the educators spent the afternoon at the Great Lakes Aquarium while the scientists aboard the ship prepped the biological and chemical labs, as well as readied their field sampling equipment, for use. We brought onboard science equipment including two special nets that are pulled behind the vessel – a manta trawl for sampling plastics and a tucker trawl for sampling fish larvae.  Also a variety of microscopes with cameras attached for photographing, counting and measuring organisms. A special sensor was brought that can quickly determine the different types of algae present in the lake. And a great deal of filtering equipment was brought along for water quality sampling. We will blog more on the science equipment as we go along.

Tomorrow we run out to Stony Point to intercept a remote sampling vehicle that “flies” through the water by itself, taking measurements of the lake’s physical and chemical characteristics, such as temperature and color. It has been sampling for the past two days across the western arm of Lake Superior, taking continuous measurements. From there, we will head back towards Duluth for our first official Year of Lake Superior sampling site as part of the Coordinated Science and Monitoring Initiative. This will be our first major science station for the cruise.

Group of teachers at the Great Lakes Aquarium working on their first assignment - concept mapping.

Group of teachers at the Great Lakes Aquarium working on their first assignment - concept mapping.

The first day of the cruise is always tough and exciting. Tough because there are many preparations to be made, exciting because Thursday, we will push away from the dock, say farewell to land, and go to work.

About the author: Dr. Joel Hoffman is a research biologist in EPA’s Mid-Continent Ecology division, and. the head scientist for the 2011 Lake Guardian Shipboard and Shoreline workshop on Lake Superior.

Editor's Note: The opinions expressed here are those of the author. They do not reflect EPA policy, endorsement, or action, and EPA does not verify the accuracy or science of the contents of the blog.

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Exploring The Sea – EPA Monitors Waste Disposal Sites Off The Mid-Atlantic Coast

Each year, as the summer season comes to an end, I reflect on the experiences that made it a great summer. As a new employee at EPA, this summer was particularly exciting. I had the experience of working with the Mid-Atlantic Region’s Coastal Science Team, led by Renee Searfoss and Jim Gouvas . The two-week monitoring cruise, aboard EPA’s Ocean Survey Vessel (OSV), the BOLD consisted of two surveys spanning from North Carolina to the south tip of New Jersey. Working in shifts of four hours on and eight hours off, I worked from noon until 4pm and again from midnight to 4am! Those lucky enough to work the 4-8 shift were able to enjoy both the sunrise and sunset!

EPA is required to biannually monitor the Region’s two designated ocean disposal sites – the Norfolk Ocean Disposal and the Dam Neck Ocean Disposal Sites – to ensure that no further degradation has occurred from the placement of dredge material or fish waste. For the first survey, we collected sediment samples, monitored fish waste and conducted sonar scanning.

At the Dam Neck Disposal Site, we collected fifty surface sediment samples, which were analyzed for grain size, total organic carbon (TOC), metals, distribution, biomass and the presence of bottom-dwelling species. By comparing data with a control site, we could tell what has occurred at the waste sites due to the material disposed there.

The team conducted eight tow runs using a rocking-chair dredge to collect sediment from the ocean floor (picture), such as Horseshoe crab and Hermit crab, which were identified and returned to the site. Lastly, the team conducted eight transects using a trawl net. This part was exciting – you never know what you could catch! Although different species of fish, such as Northern Sea Robins and Spotted Hakes, were identified, you won’t find any fishermen fishing the area, there weren’t any commercially useful fish present.

In short, the voyage was very successful and made for an extremely memorable summer experience. Everyone comes with a wealth of experience and all shared a passion for the ocean and its continued preservation. Research expeditions like this one are crucial to maintain our knowledge of the effects humans have on our oceans.

About the auth0r: Matthew Colip works as a biologist in EPA Region 3’s Water Protection Division dealing with issues related to data and information systems management.

Editor's Note: The opinions expressed here are those of the author. They do not reflect EPA policy, endorsement, or action, and EPA does not verify the accuracy or science of the contents of the blog.

Please share this post. However, please don't change the title or the content. If you do make changes, don't attribute the edited title or content to EPA or the author.