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Grand Haven students participate in annual fishing event
Grand Haven Tribune (5/15)
In Michigan, Grand Haven Area Public Schools partnered with a nonprofit organization called Pursuing a Dream to give about 300 students with special needs the opportunity to fish and enjoy the outdoors.

NYPA funding aids three St. Lawrence River projects
Watertown Daily Times (5/10)
The St. Lawrence River Research and Education Fund has provided funding for three projects that support environmental education in and around the riverís ecosystem.

Lake Michigan Academy students learn from 'Salmon in School' project
MLive (5/9)
About 100 schools throughout Michigan are selected to take part in the Lake Michigan Academy program that aims to help stock local rivers and support fishing as a leisure activity.

Huron Perth students find Lake Huron threats
Blackburn News (5/1)
Nearly 60 high school students from the public and separate boards in Huron and Perth counties spent one day at the Oakwood Inn in Grand Bend, Ontario, where they were learning about the environmental threats and challenges to Lake Huron.

TEACH Calendar of Events
What's going on in your neighborhood this month? Meet other people and learn together at recreational and educational events! Our new dynamic calendar is updated daily with current educational events.
TEACH Invasive Species

table of contents
Introduction
The Zebra Mussel
Other species making headlines
How do invasive species get here?
Prevention and control
How can you prevent the spread of nonindigenous species?
References and more information

If you live on the Great Lakes or in a similar coastal area, you've no doubt heard of zebra mussels or sea lamprey. Chances are you've also seen patches of purple loosestrife growing in your community or on the side of a local highway. You might not have recogized this attractive flowering plant as a non-native species, but it is. Although pretty to look at, these purple stalks are choking out native plant species by overtaking and altering their habitat.

Sea Lamprey. Click to see larger image.These are just three of the more than 140 nonindigenous, or invasive, species that have become established in and around the Great Lakes since the 1800s. In fact, due in large part to increases in the volume of shipping traffic, the introduction of new "exotic" species has increased dramatically over the past 50 years. More than 87 nonindigenous aquatic species have been accidentally introduced into the Great Lakes in the 20th Century alone. Once introduced, invasive species must be managed and controlled, as they are virtually impossible to eradicate.

While many non-native species have no serious ecological impact, the introduction of a single key species can, as in the example of the sea lamprey, cause a sudden and dramatic shift in the entire ecosystem's structure. New species can significantly change the interactions between existing species (and between those species and their non-living environment), creating ecosystems that are unstable and unpredictable.

Graphic: Sea Lamprey shown attached to a lake trout. Courtesy U.S. Fish & Wildlife Service.

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