For decades, government agencies and private groups have been working to rebuild Great Lakes coastal wetlands such as swamps, bogs, and marshes that have been depleted by development. A federal report suggests the work is beginning to pay off.
The eight-state Great Lakes region — extending from western New York to eastern Minnesota— was the only section of the United States where coastal wetland acreage increased during a five-year period when scientists took extensive measurements with satellites and field photography.
The gain was modest — 13,610 acres, an area not quite as large as the New York City borough of Manhattan. Yet it happened as the rest of the nation’s coastal wetlands shrank by 360,720 acres. Full story for BostonGlobe.com subscribers.