Sun, Sep 16, 2007 - Page 7 News List

US fights to restore Midwest wildlife habitat

RESCUE The government has spent about US$320 million on the monitoring and habitat restoration program since 1986, including US$35 million for island building


On the Mississippi River below the verdant bluffs that mark the far southern Minnesota-Wisconsin line in the US Midwest, the federal government is waging a multi-million dollar campaign against the elements.

For the last few weeks, the US Army Corps of Engineers has transformed a 5km stretch of river into a floating construction zone, restoring and creating new river islands.

The goal: restore wildlife habitat lost to a half-century of erosion and, in turn, bolstering fishing, waterfowl migration and the overall health of the river's northern stretches.

No one has tried a restoration program of this size on such a large river, said Marvin Hubbell, regional manager for the project for the US Army Corps of Engineers.

So far it has gotten favorable reviews from the engineering community and river lovers. Officials are considering it as a model for restoration on the Rio Grande as well as the Parana River in Brazil and the Yangtze River in China, Hubbell said.

The work on the Mississippi is part of a larger effort to create dozens of islands between Cairo, Illinois, and the Minneapolis-St. Paul area in Minnesota that has been going on for nearly two decades.

Gary Dillabar, 63, said he remembers when the Mississippi River near Stoddard, Wisconsin, was an open expanse of brown water. Last year, the corps added three islands, and now the water is clearer and fish are spawning there.

"It's one of the few places today where government money is being used and shows a good, positive result," Dillabar said. "Those projects are going to be the savior of the river."

Problems on the upper Mississippi began in the mid-1930s, when the corps installed dams that transformed it into a chain of shallow lakes. For a quarter-century the dams were a boon because they expanded fish habitat, corps biologist Randall Devendorf said.

But no one realized the wind whipped across much larger bodies of water, creating intense waves that eroded islands like never before.

A 8km portion of river between Brownsville and Genoa, Wisconsin, lost 200 of its 253 island hectares between 1939 and 1989, said Jim Nissen, a manager with the Upper Mississippi River National Wildlife and Fish Refuge.

With island loss came more wind and suspended sediment, blocking sunlight aquatic plants need. As plants died, fish and waterfowl lost food and cover.

A number of Mississippi River states, including Wisconsin, Minnesota and Illinois, joined with the US Geological Survey, the US Fish and Wildlife Service and the corps in the late 1980s to revitalize the river's ecosystem.

They developed a strategy for about 1,930km of the Mississippi and Illinois rivers that called for reducing water levels to expose more land, monitor the river's health and use sediment to reinforce existing islands and build new ones.

The hope was the islands would block the wind and serve as a base for re-introducing vegetation, the first step toward enticing wildlife.

"It helps ensure we have a resource here we can pass on to our kids,"Devendorf said as he watched three young bald eagles perch on a corps-built sand island near Brownsville.

The US government has spent about US$320 million on the monitoring and habitat restoration program since 1986, with about US$35 million of that covering 19 island-building projects on the upper Mississippi and Illinois rivers, Hubbell said. In 1999, Congress re-authorized US$33.5 million annually for the management program, with no end date.

Comments will be moderated. Keep comments relevant to the article. Remarks containing abusive and obscene language, personal attacks of any kind or promotion will be removed and the user banned. Final decision will be at the discretion of the Taipei Times.

TOP top