Real-time wave information now available

by Gene Clark, PE (Wisconsin Sea Grant) and Dr. Chin Wu (UW Madison)

The sea caves at the Apostle Islands National Lakeshore are unique and spectacular natural rock formations. These eroded sandstone formations were formed when lake water and waves eroded the soft sandstone near the water edge, yielding a series of caves carved out of the exposed sandstone cliffs.

In Lake Superior, many sea caves are located on two of the islands—Devils Island and Sand Island—as well as on a relatively remote area on the mainland near Meyers Beach. The mainland sea caves can be viewed from above on land by a rugged two-mile hike along the bluff top trail from the Meyers Beach parking lot, but the best way to see these rock formations is on the water.

...read the rest of the article on the Wisconsin Coastal Management website.

Read a recent article in the Summer 2009 Aquatic Sciences Chronicle for further information and to watch a video about the project.

Photo courtesy the National Park Service.

New Climate Change Resources in the Library

Recently, Wisconsin's Water Library updated our website to include information on, and access to a variety of climate change materials. We have created several climate change recommended reading lists for adults, which are broken down by category. These include Economies and Society, Policy, Great Lakes and Water.

We have also added a climate change recommended reading list for children, as well as a list of websites that were designed specifically for kids. For teachers and educators, we have added a curriculum ideas page which will provide some good starting points for those wishing to incorporate climate change into their lesson plans.

Book cover of Climate change begins at home: Life on the two-way street of global warming by David Reay.

USGS Tracks Loon Migration by Satellite

Minnesota has the highest loon population in the continental US with over 10,000 adult loons. Many Midwestern loons reside in the Great Lakes during spring and summer months before they begin their annual migration to warmer areas such as the Pacific, Atlantic, or Gulf Coasts. Loons feed mainly on fish and other aquatic life.

Since the 1960's scientists have recorded cases of botulism in loons, but the numbers greatly increased starting in 1999. The Upper Midwest Environmental Sciences Center, a branch of the USGS, has equipped ten loons with satellite transmitters in hopes of tracking migration and ultimately discovering physical and biological links to the botulism outbreaks. The loons were tagged in July and their migration can be followed on this website. These transmitters allow researchers to track temperature and pressure, as well as location, which they hope will reveal foraging information. Other loons were also tagged with geolocators which will record information that researchers will collect when they remove the tags during the following season.

You can hear the call of a common loon here. For further reading, click here to access our recommended reading list on Great Lakes Birds.

Photo of Biologists Luke Fara and Kevin Kenow recording the measures of a common loon courtesy of Upper Midwest Environmental Sciences Center.

Highlight on Cat Islands

Last week, Lisa Jackson, US EPA administer, announced EPA’s first Great Lakes Restoration Initiative competitive grants which included a $1.5 million dollar grant for the Cat Island Chain Restoration Project in lower Green Bay.

Details of the project funded by the grant are:

Grant Number: 00E00552
Total Federal Award: $1,500,000
Applicant Name: Brown County
Project Title: Cat Island Chain Restoration Project

Project Description: This project supports the Great Lakes Restoration Initiative and the Great Lakes Water Quality Agreement, pursuant to Public Law 111-88. Specifically, it consists of constructing a 2.5 mile barrier in Lower Green Bay to begin the process of restoring the Cat Island Chain of barrier islands. Three barrier islands will be created over the next 20 years. These islands will protect and enhance 1,400 acres surrounding Duck Creek (a tributary to Green Bay). This project will also provide immediate environmental benefits by protecting wetlands and promoting emergent and submergent aquatic vegetation growth in Lower Green Bay.

Vicky Harris, Wisconsin Sea Grant outreach specialist, has been working in this area for years. Read about her work.

To learn more about the Great Lakes Restoration Initiative, visit their website.

image above from Wisconsin Sea Grant.

Why Worry About Asian Carp When There Are Quagga?

Dr. Charles Kerfoot, a researcher funded by NOAA and The National Science Foundation, isn't worried about Asian Carp. He says "by the time the carp get here, there won’t be anything left for them to eat," referring to the quagga activity that has been identified in Southern Lake Michigan.

These small European mollusks, about the size of a lima bean, have been discovered in abundance feeding on phytoplankton in Lake Michigan. A doughnut shaped collection of algae and other tiny plants was discovered in winter with the aid of NASA’s new Sea-viewing Wide Field-of-view Sensor (SeaWiFS). Between 10,000 and 15,000 quagga mussels can inhabit one square meter in the soft lake bed and have been found in all of the Great Lakes. Consuming phytoplankton at a rate of five to seven times that of the production rate, the massive number of quagge are excreting enough to stimulate the growth of Cladophora algae (see the DNR article on it here). When the algae dies and decomposes, it eliminates oxygen from the surrounding waters increasing the likelihood of botulism. The predictable result from all this is a decline in lake species starting with smaller ones such as zooplankton, and then continuing on to chub and alewives, eventually leading to even the larger fish that inhabit Lake Michigan.

The Journal of Great Lakes Research has published the article on Kerfoot's research called "Approaching Storm: Disappearing Winter Bloom in Lake Michigan," which is available online, here. For an overview of the topic see the Michigan Tech News release, here.

Video of quagga mussels feeding by John Karl at UW Sea Grant.

Lake Superior National Estuarine Reserve

The State of Wisconsin nominated the freshwater estuary situated on the confluence of the St. Louis River and Lake Superior for consideration as the 28th National Estuarine Research Reserve in 2008. NOAA has been working with the reserve state partner, University of Wisconsin-Extension and others, to complete the Final Environmental Impact Statement and Management Plan for the proposed Lake Superior Reserve. The proposed site consists exclusively of public lands and waters owned by the Wisconsin Department of Natural Resources, City of Superior, Douglas County and the University of Wisconsin. The site is a diverse complex of representative terrestrial and aquatic habitats that form a unique freshwater estuary where the St. Louis River empties into Lake Superior. Each of the four components identified as the preferred alternative are within close proximity to each other. The combination of components being considered will provide a wide range of estuarine research and public education opportunities and contribute to the national system of research reserves.

The Federal Register announcement for the Reserve appeared on September 3rd.

[Search help: Click on this link for advanced search and input September 3rd as publication date and search for the term "Lake Superior National Estuarine Reserve". The first hit will be the Federal Register notice.]

For more information about the reserve (including a link to the Final Environmental Impact Statement), visit NOAA's website.

Photo credit: Pokegama River wetlands - Mike Anderson; from the NERR's website.

Where Does the Salt from Winter Roads Go?

A recently released study conducted by the USGS Wisconsin Water Science Center has shown that streams are being adversely affected by the use of salt for deicing roads, sidewalks and parking lots. The study focused especially on eastern Wisconsin and Milwaukee, but also included other northern U.S. cities.

In eastern and south-central Wisconsin, chloride levels exceeding US EPA chronic water quality criteria were found in 100 percent of urban streams during winter. These chloride levels are the determinant of toxicity in the water. Further, the chloride levels of the water were not declining enough even by the time summer came in order for those streams to be suitable for many aquatic inhabitants. Nationally, 55 percent of northern streams samples chloride levels exceeded US EPA chronic water-quality criteria.

Matthew C. Larsen, the Associate Director for Water at the USGS says: "This study suggests the need for advancements that will reduce salt loads to surface waters." Read the full release: "Many Urban Streams Harmful to Aquatic Life Following Winter Pavement Deicing" on the USGS website. For further reading suggestions, see our recommended reading list on Understanding and Protecting Groundwater.

Photo by Michael Pereckas