Author Archive

Dave Dempsey

Dave Dempsey is a writer active in conservation for more than 25 years. A frequent freelance contributor and newsweekly columnist, Dave is the author of four award-winning books on the environment and a biography of Michigan’s longest-serving Governor, William Milliken.

A native of Michigan who now lives in the Twin Cities metro in Minnesota, Dave served as environmental advisor to Michigan Governor James J. Blanchard from 1983-89. President Clinton appointed him to the Great Lakes Fishery Commission in 1994. Dave has also held numerous administrative, policy and consulting positions for nonprofit conservation and environmental organizations in Michigan and Minnesota. He was both policy director and executive director at the Michigan Environmental Council and Great Lakes policy consultant for Clean Water Action.

Dave has a bachelor of arts degree from Western Michigan University and a master’s degree in natural resource development from Michigan State University, and has served as an adjunct university instructor at MSU in environmental policy.

Invasion of the Fish Snatchers?

Bighead carp are one of two non-native species of Asian carp causing widespread concern among Great Lakes advocates. The other is silver carp.

Great Lakes advocates are calling it a “conservation emergency” now that non-native Asian carp have been detected within seven miles of Lake Michigan. They want an immediate closure of locks and gateways leading to the lake in a literally”last-ditch” attempt to keep the fish out.

The fear is that the giant fish will disrupt the valuable Great Lakes sport fishery by outcompeting species at the top of the Lake Michigan food web, consuming the forage fish the established species depend on — and like many of the other 180 non-native aquatic species already in the Great Lakes, causing general ecosystem disruption.

Grass to Gas: Landfills Want Yard Waste



A landfill gas-to-energy plant in Conestoga, Pennsylvania.
When it comes to corporations fighting climate change, landfill owners don’t necessarily leap to mind. But in Michigan, the landfill industry is working to repeal a 19-year-old ban on the disposal of grass clippings and tree trimmings in dumps — on the grounds that the yard waste, mixed with typical garbage when buried, makes a perfect brew for what it terms renewable methane production.

The Western Lake Erie Waterkeeper

One of the leading voices in the campaign to rescue Lake Erie from dying again is a persistent, thoughtful, dedicated water protector promoting awareness of the Lake’s benefits, supporting lighthouse restoration, fighting resurgent algae and proposed new pollution sources, and seeking funding to restore all of the Great Lakes. She’s an example of the citizen action that has a fighting chance of fending off multiple threats to the Lakes and renewing their beauty and productivity.

Environmentalist, Conservationist, Or Neither?

Darby Nelson, a member of a Minnesota state panel that advises the Legislature on fish, game and wildlife habitat spending, is a classic conservationist.

Almost 40 years after the first Earth Day, the term environmentalist is in some disrepute. Once a badge of honor for public-spirited citizens seeking to protect and clean up air, land, water and fish and wildlife, the word is now often associated with special interest politics. Is it time somehow to restore the term to its original associations or to choose another, like conservationist?

Great Lakes Get $475 Million in New Money, Questions Persist

Pollution from industrial facilities like this one at East Harbor in Indiana up to the 1970s left a legacy of contamination still in need of cleanup from new Great Lakes restoration funding.

Giving President Obama a major victory, Congress on Thursday sent him a spending bill containing $475 million in new funding to help restore the Great Lakes. During his 2008 campaign, candidate Obama committed to a multi-year effort to combat Great Lakes invasive species, habitat loss, climate change impacts and threats to water quality. The Great Lakes contain almost one-fifth of the world’s available surface freshwater.

An Ocean of Effort

Ocean trash is one of the problems photographed by Christopher Swain on his 1,000-mile ocean advocacy and education journey.

As the Obama Administration’s Interagency Ocean Policy Task Force moves into its sixth public meeting on an interim report in Cleveland this week, one determined ocean advocate is continuing to make his way from Massachusetts to Washington, D.C, in part to dramatize his concern about the state of the seas.

Christopher Swain’s 1000-mile swim, which includes frequent stops along the way to educate students and to do sampling, was born out of a childhood connection to the sea growing up in Massachusetts. He says the journey will take about 200 days of swimming over two years — and will continue off-and-on through the winter.

The Missing Link in Climate Change: Product Policy

Although images of giant coal-fired smokestacks and automobile tailpipes characterize greenhouse gas scenarios, a new report proposes a different way of thinking about it – product policy.  Products and packaging contribute 44% of U.S. greenhouse gas emissions and reduction plans are more likely to succeed if extended producer responsibility (EPR) is made a cornerstone of commerce and environmental policy, the report says.

Is Great Lakes Shoreline Public or Private?

Legal skirmishes in Ohio and Michigan are reviving debates over whether those who own Great Lakes shoreline properties exclusively control their waterfront land or whether the public can access and travel along the coast.  The same legal doctrine at issue in these battles is a central focus in current debates about n a time of potential c ommercialization of Great Lakes water.

Algae Blooms in Lake Erie Bring Back Bad Memories

Lyngbya wollei, south shore Maumee Bay in Ohio, September 23, 2009.

Lake Erie, declared dead by the news media in the 1960s because of widespread, repulsive algae blooms, is once again marred, this time by both old and new causes. Some scientists and lake advocates worry that the unsightly algae is a warning of a lake once again in decline.

Tom Bridgeman, a lake scientist with the University of Toledo’s Lake Erie Center, said, “I’ve never seen the water as green as it was this year — and it’s not showing any signs of dying off yet. This is a growing problem.” Increased phosphorus runoff from farms and city streets, coupled with the feeding and excretion habits of non-native mussels introduced through ballast water, is believed to be associated with the resurgent blooms.

The western end of the lake has suffered from a surge in microsystis algae this summer. Bridgeman hypothesizes that in addition to phosphorus, underwater sediment shifts are culpable.

Dog Death Caps Summer of Blue-Green Algae in MN

Blue-green algae blooms on Minnesota lakes are linked to a dog death and illnesses, and apparently caused by runoff pollution.

The death of a dog after it frolicked in a Minnesota lake plagued with blue-green algae was a sad coda for a late summer in the state. Although no necropsy was done, a spokesperson for the Minnesota Pollution Control Agency said  “the circumstances and manner of death were consistent with exposure to algal toxins.” He added that the MPCA had received reports of several other sick dogs likely exposed to the algae.

Compounding the sadness, the dog that died after exposure in Fox Lake, a black Lab named Sady, was a wedding gift to the dog’s owners from a friend and soldier killed in Iraq.

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