While the Brazilian government has dramatically curtailed deforestation, further efforts to slow the damage from logging would make the forest more resilient to another threat: climate change. Photo: David Funkhouser
Important global ecosystems like the Amazon rainforest and Great Barrier Reef are in danger of breaking down because of a combination of local pressures and climate change, but better local management could help make these areas more resilient, say the authors of a paper published by Science.
Ecosystems may show only a slight response to changing climate until they hit a tipping point, when even small changes could bring about a collapse. The paper’s authors contend that improving local conditions could forestall the impacts of climate change, perhaps more effectively than global efforts to curb the greenhouse gas emissions driving the warming.
While local governments have made some progress in protecting important ecosystems, the areas are still under increasing threats from development, land-clearing, overfishing and fertilizer pollution. The authors say that local stewardship of the areas “is at risk of failing.”
ON CONNECTICUT’S SHORE,
A SEARCH FOR CLUES
Hartford Courant, July 22,2007 (updated May 2, 2014, see endnote)
By DAVID K. FUNKHOUSER
BRANFORD –Peter Banca looked out a window of his Stony Creek home, across his sloping lawn to the green swath of marsh named for his father, a look of surprise on his face.
“I had no idea,” he said when confronted with the prediction that the marsh would disappear in a few decades. But he knew the implications immediately.
Banca marsh has been losing 10 or more feet of its seaward edge each year to what some scientists call sudden wetland dieback — a so-far unexplained phenomenon in which marsh grasses die off, leaving mud, pocked with holes, to wash away with the tide. Even away from the edge, pockets of marsh grass are fading into barren mud sinks.
The fate of Banca marsh, and of tidal wetlands around the world, may be tied to rising sea levels and global warming in intriguing ways. The life of these simple grasses ebbs and flows to the moon’s orbital cycles, to the pressing influence of humans and perhaps even to a fungus that sails across the Atlantic Ocean on dust storms kicked up by drought in Africa.