March 24th, 2015 by iisg_superadmin
Scientists at the University of Illinois at Chicago have unearthed a species of Lake Michigan bacteria that may become a powerful weapon in the fight against tuberculosis. Found in the sediment off the coast of Milwaukee, the microbe’s medicinal power lies in the small compounds it makes to defend itself.
UIC researcher Brian Murphy and colleagues at the College of Pharmacy are still trying to pin down how the molecules attack the M. tuberculosis bacterium, but they know that the compounds display drug-like potency against a range of antimicrobial-resistant strains that rivals existing clinical treatments.
This study is part of a larger effort by Murphy and others to determine the disease-fighting potential of aquatic actinomycete bacteria. Current treatments for many diseases are built around the chemical defenses used by land-based bacteria, but a growing number of pathogens are now resistant to standard drugs. Results like these in Lake Michigan suggest that freshwater bacteria may create molecules that dangerous pathogens have yet to evolve defenses against, making the Great Lakes a potentially untapped reservoir of treatments for some of the world’s deadliest diseases.
To understand the potential of the lakes, Murphy has collected more than 600 strains of freshwater actinomycete bacteria with support from an IISG Discovery Grant. The size and diversity of the library will help reveal both whether these bacteria are significantly different than their land-based cousins and if strains found in different lakes produce unique chemical defenses.
This analysis is still underway, but Murphy and his team have already discovered that the makeup of actinomycete communities in Lake Huron varies both by location and depth, a diversity that makes the lake a potentially important site in the hunt for new cures.
February 9th, 2015 by iisg_superadmin
Three years after residents of Wauconda, IL approved a plan to transition to Lake Michigan water, the Lake County village has finally received the okay to build the infrastructure needed for delivery. Along with the nearby village of Volo, Wauconda is expected to begin tapping into the new source in 2018.
From the Chicago Tribune:
The agreement to deliver Lake Michigan water to Wauconda was a long time coming.
In 2012, Wauconda voters approved a $50 million plan to access Lake Michigan water, according to previous Tribune reports. But a deal with the water agency fell through in 2013, following a collapse in negotiations.
Talks started again in 2014, according to Tribune reports, with Wauconda and the agency reaching a deal early this year to deliver water to both Wauconda and Volo.
Now, planners are figuring out where to lay about 11 miles of new water pipe, said Darrell Blenniss, the joint water agency’s executive director. Read more
The move toward Lake Michigan water is important for Wauconda and Volo. Like many northeastern Illinois communities, these villages currently draw water from deep-rock aquifers that are being drained faster than they can recharge. Lake Michigan offers a more dependable supply for these growing communities. And because groundwater supplies can contain low levels of chemicals that drive up treatment costs, the switch may also prove more cost effective.
But transitioning aquifer-dependent communities to lake supplies is just one step towards securing long-term access to quality drinking water. Conservation is needed to ensure communities don’t pull more from the lake than federal law allows and to relieve some of the pressure on inland supplies.
That’s why IISG has teamed up with the Chicago Metropolitan Agency for Planning to help communities implement some of the key water supply management strategies laid out in the region’s Water 2050 plan. For example, we developed the Full-Cost Water Pricing Guidebook to help officials adopt prices that fully reflect water costs and encourage conservation. Margaret Schneemann, our water resource economist, has also helped planning groups and communities adopt lawn watering ordinances to curb inefficient outdoor water use.
To learn more about these and other efforts, visit our Water Supply page.
February 5th, 2015 by iisg_superadmin
Fisheries managers have long known that the population of rainbow smelt in the Great Lakes is on the decline. Once so abundant that they could be fished out with a pot or strainer, this important prey fish survives today in numbers hovering near historic lows. Numerous causes for the falling population have been proposed, but new research suggests that the population patterns and the forces driving them are more complicated than previously believed.
The 2014 study reveals that number of smelt that survive their first few months has actually been on the rise since 2000. But this increase in hatchlings isn’t translating into more adults, and it is unclear when and why that breakdown is happening. Whatever the cause, the loss of adult rainbow smelt is enough keep the population trending down even as offspring survival improves.
Researchers from USGS, IISG, Purdue University, and the U.S. EPA Great Lakes National Program Office, discovered the unexpected increase in offspring after analyzing roughly 40 years of fisheries data using a novel modeling technique.
Fish populations are typically analyzed using a statistical model that that assumes the relationships between different variables—things like number of offspring, number of adults, degree of predatory pressure, and amount of rainfall—remain the same over time. For this study, researchers used statistical tools rarely used by fishery scientists that better reflect the ever-changing nature of the Great Lakes and make it possible to detect more subtle population patterns.
Perhaps most surprising is that offspring survival is on the rise in Lake Michigan despite the fact that their parents are up to 70 mm shorter now than they were in the 1970s.
“We were expecting to see a decrease in productivity because the adults are maturing at smaller sizes, which should mean fewer eggs and less healthy hatchlings,” said Zach Feiner, a PhD student at Purdue University and lead author of the study. “This raises a lot of questions about how well we understand rainbow smelt fisheries.”
Researchers speculate that the drop in the number of adult smelt may actually be allowing hatchlings to thrive. Adult rainbow smelt frequently supplement their diet of zooplankton by dining on their offspring. Fewer adults means fewer predators for juvenile smelt. The need to find food in a lake infested with millions of quagga and zebra mussels that filter out plankton may also be driving adults further out into the lake and away from spawning grounds.
***Photo courtesy of Crystal Lake Mixing Project.
December 10th, 2014 by iisg_superadmin
A closer look at web tools and sites that boost research and empower Great Lakes communities to secure a healthy environment and economy.
It’s getting a little chilly for a stroll in the Windy City, but don’t let that stop you from enjoying it’s beautiful downtown lakefront. With Chicago Water Walk, you can explore some of the city’s most celebrated sites—Navy Pier, the Chicago River, downtown marinas, Buckingham Fountain, and Museum Campus—from anywhere.
The mobile-friendly website takes viewers on a journey through time to discover how Lake Michigan and the Chicago River transformed a small trading post into one of the economic and cultural hubs of the world—and the vital role these natural resources play in the city’s present and future.
Each stop in the virtual tour combines history, current events, and water sciences with fun facts to show the importance of aquatic ecosystems in the city’s past, present, and future. Stunning photos, historical images, and links to videos and other resources bring these issues to life and reveal a lakefront that will surprise even lifelong Chicagoans.
Visit the website and you’ll learn why the decision to reverse the Chicago River is still making waves more than a century later, how a city that sits along Lake Michigan can be concerned about having enough water in the future, and how native trees and plants are helping the city prepare for changing weather patterns. You’ll also hear about efforts to restore much-needed habitats for millions of birds, fish, and other wildlife.
And for those willing to brave the cold, a mobile tour app is available for free on Apple devices. You can follow the suggested routes or visit the sites that most appeal to you using the app’s interactive map.
The Chicago Water Walk website and app were developed by Illinois-Indiana Sea Grant with funding from the Illinois Department of Natural Resources Coastal Management Program and technical support from the University of Illinois Administrative Information Technology Services.
November 19th, 2014 by iisg_superadmin
Former intern Jacob Wood received an award earlier this month for a poster he presented during Purdue University’s GIS Day, an annual event dedicated to geospatial research and geographic information systems (GIS).
“The poster detailed my work over the summer with IISG on mapping Lake Michigan catch data. Jarrod Doucette and myself have been working creating a web app for the IISG website to visualize two decades of recorded fish catch data from the Indiana, Michigan, Illinois, and Wisconsin Departments of Natural Resources. I thought presenting the poster at Purdue’s GIS Day would be a great way to show the work that I accomplished for IISG over the summer.”
Read more about our summer internship program and hear from past interns about what they are up to now.
November 11th, 2014 by iisg_superadmin
If you’re a regular visitor to Great Lakes beaches, you likely noticed that this year’s swim season was chillier than normal. Cold enough, in fact, that many chose to skip swimming in favor of other beach activities. And according to officials at the National Weather Service, this may explain the unusually low number of current-related fatalities and rescues this year.
From Michigan Sea Grant:
There were 6 fatalities and 12 rescues related to currents on the Great Lakes, which is below the 12-year average of 12 fatalities and 25 rescues per year.
As is typical, the majority of the 2014 incidents occurred along Lake Michigan. On average from 2002-2014, Lake Michigan had 25 incidents per year, while Lake Erie had 5 incidents per year, Lake Superior had 3 incidents and Huron and Ontario average 1 to 1.5 per year, respectively.
The data for 2014 has now been updated in the Great Lakes Current Incident Database, available at DangerousCurrents.org. The database was developed and is maintained by Michigan Sea Grant and National Weather Service (NWS). Megan Dodson, a NWS meteorologist, gathers the statistics for the database and provides yearly swim season assessments of conditions related to currents.
Dodson noted the cool weather influenced not just the below-average number of incidents, but where they happened too.
“A majority of the current-related incidents in 2014 occurred near river mouths, which is unusual when compared with past years,” she said. “The cooler air and water temperatures may have driven beachgoers to swim near river mouths and other outlets, where the water is much warmer. However, there are currents present that can be strong and vary depending on the flow of the outlet and the waves at the beach. While these currents are most dangerous during times of high waves, they can still be strong despite calmer lake conditions — as we saw during the 2014 swim season.” Read more
Swim season may be over, but it is never too early to start planning for next year. To stay safe in the water, be sure to:
- Steer clear of the pier — Nearly 60 percent of fatalities and rescues in the Great Lakes database occurred near breakwaters and piers. Structural currents are nearly always present near these barriers, even when waves are low. Breaking waves can also bounce off the structure, making swimming nearly impossible.
- Stay dry when waves are high — Nearly 85 percent of fatalities and rescues in the Great Lakes database happened when waves are 3-5 feet or greater. Unlike in the oceans, Great Lakes waves crash against the shoreline in rapid succession, making it difficult to swim. Additionally, strong rip currents are more likely when waves are above 3 feet. The combination of quickly approaching waves and strong currents create extremely dangerous conditions for swimmers.
- Don’t swim in the outlet — Water flowing from a river mouth or other outlet can push swimmers out into the lake. Nearly 40 percent of the 2014 incidents were outlet-current related.
November 3rd, 2014 by iisg_superadmin
After decades of remediation work, two Michigan sites are no longer considered Areas of Concern (AOCs). The U.S. Environmental Protection Agency officially removed Deer Lake in the Lake Superior basin and White Lake in the Lake Michigan Basin from the list of toxic hot spots last week.
These are the third and fourth U.S. sites to be delisted since a 1987 cleanup agreement with Canada identified areas hit hardest by legacy pollutants like PCBs and mercury. The Oswego River in New York became the first in 2006, and Pennsylvania’s Presque Isle Bay was delisted last year.
From the Detroit Free Press
The Deer Lake AOC, along the southern shore of Lake Superior on the Upper Peninsula, was listed because of mercury contamination that leached into water flowing through an abandoned iron mine, as well as other pollutants. Mercury contamination in fish—and reproductive problems—also were documented in animals and birds, including bald eagles.
The remediation efforts included a Great Lakes Restoration Initiative grant for $8 million that helped pay for a project diverting water from Partridge Creek. It previously fed the stream flowing through old mine workings under Ishpeming, which then ran into another creek and into Deer Lake.
The White Lake AOC was on Lake Michigan in Muskegon County and had been contaminated by pollution—especially organic solvents—from tannery operations, chemical manufacturing and other sources, degrading fish and wildlife habitats.
A $2.5-million grant was used to remove contaminated sediment and restore shoreline, with more than 100,000 cubic yards being removed. Read more
More than two dozen AOCs remain throughout the Great Lakes states. But as many as 10 are targeted for completion in the next five years thanks in part to funding from the Great Lakes Restoration Initiative, which will enter its second phase next year.
Two of the sites slated for delisting are the Buffalo and Grand Calumet rivers, where IISG’s Caitie McCoy has partnered with federal, state, and local groups under the Great Lakes Legacy Act to connect nearby communities with the remediation and restoration. A big part of this work has focused on integrating environmental cleanup projects into the classroom with place-based curriculum and stewardship projects.
***Deer Lake in Ishpeming. Credit: Stephanie Swart, Michigan Department of Environmental Quality.
October 28th, 2014 by iisg_superadmin
Earlier this month, officials in Michigan announced that genetic material from silver carp, a species of Asian carp, had been discovered in the Kalamazoo River around 20 miles upstream from where the river flows into Lake Michigan. It was the first time a positive sample of eDNA had been found that close to the lake.
The results drew national attention and had many concerned that it wouldn’t be long until the infamous invader entered the Great Lakes. Further testing, though, reveals that there is no evidence of Asian carp in the river, Lake Michigan, or any of the other Great Lakes.
“We are pleased these samples were negative, but that doesn’t mean our efforts to keep Michigan’s waters are over,” DNR Fisheries Division Chief Jim Dexter said in a statement.
Asian carp were imported in the South several decades ago, where they served a utilitarian role on fish farms. But with no natural predator, the prodigious eaters and reproducers quickly escaped and began steadily invading the Mississippi River system.
Having arrived on the doorsteps of the Great Lakes, officials in Michigan, Ohio, Wisconsin, Pennsylvania, New York and others are working diligently to organize a strategy for keeping the invasive swimmers out.
Environmentalists, ecologists and others say the carp could decimate food chains and habitats in the Great Lakes, diminishing biodiversity there and threatening a multibillion-dollar fishing industry.
The threat comes from the invaders ravenous diet and ability to out-compete native fish for food. In the Illinois River, they have already fundamentally changed the food web.
From the Spring 2013 Helm:
Asian carp do more than compete for food. They actually force native fish to change their diets, feeding on species lower on the food chain than they natural would. In a healthy food web, filter-feeders, like gizzard shad and paddlefish, eat a variety of plankton species, ensuring that there is enough food to go around. But Asian car have all but wiped out the larger zooplankton in the Illinois River, pushing fish that have historically relied on that food source to turn to smaller zooplankton and phytoplankton for a meal. As the number of Asian carp in an area grows, more and more native fish are left competing for a smaller supply of plankton.
To learn more about Asian carp and efforts to prevent their spread, visit our Aquatic Invasive Species page.
***Photo courtesy of the Asian Carp Regional Coordinating Committee
September 23rd, 2014 by iisg_superadmin
Indiana communities along Lake Michigan are celebrating this year’s SepticSmart Week, Sept. 22-26, by reminding homeowners of the importance of septic system maintenance to environmental and public health.
An estimated 60,000 households in Lake, Porter, and LaPorte counties depend on septic systems to treat wastewater. Without regular maintenance, these systems can backup or overflow, contaminating nearby lakes, rivers, and groundwater supplies with everything from excess nutrients to E. coli to pharmaceutical chemicals. Septic system failures are also one of the primary causes of beach closures in Indiana.
To prevent failures, U.S. EPA and the Northwest Indiana Septic System Coordination Work Group has some advice for homeowners:
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Protect it and inspect it: Have your system inspected every three years by a licensed contractor and have your tank pumped when necessary, typically every 3-5 years. Many septic system failures occur during the holiday season, so be sure to get your system inspected and serviced now before inspectors’ schedules fill up around the holidays.
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Think at the sink: Avoid pouring fats, grease and solids down the drain. These substances can clog pipes and the drain field.
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Don’t overload the commode: Only put things in the drain or toilet that belong there. Coffee grounds, dental floss, diapers and wipes, feminine hygiene products, cigarette butts, and cat litter can clog and damage septic systems.
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Don’t strain your drain: Be water efficient and spread out water use. Fix plumbing leaks and install faucet aerators and water-efficient products. Spread out laundry and dishwasher loads throughout the day. Too much water at once can overload a system that hasn’t been pumped recently.
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Shield your field: Remind guests not to park or drive on the drain field, which could damage buried pipes or disrupt underground flow.
The Northwest Indiana Septic System Coordination Work Group brings together federal, state, and local governments and agencies, state and county health departments, and not-for-profits to provide homeowners with information and assistance on the proper care of septic systems. IISG’s Leslie Dorworth has been a part of the group since it began in 2012. For more information or to get involved locally, contact Dorreen Carey at the Indiana DNR Lake Michigan Coastal Program at 219-921-0863 or dcarey@dnr.in.gov.
SepticSmart Week is part of U.S. EPA’s year-round SepticSmart program. In addition to educating property owners, the program is an online resource for industry practitioners, local governments and community organizations that provides access to tools to educate clients and residents.
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