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.”
(Post first published on State of the Planet April 22, 2014.)
“Right now, we’re living in a world of a Pliocene atmosphere,” scientist Maureen Raymo of the Lamont-Doherty Earth Observatory tells the Yale Forum on Climate Change and the Media. “But the whole rest of the climate system — the oceans are trying to catch-up, the ice sheets are waning, and everything is trying to catch up to this Pliocene atmosphere.”
CO2 levels in the atmosphere hit the 400 parts per million mark last spring, and scientists expect we will hit that level for all of the month of April and possibly into July this year. The last time CO2 levels were that high was about 3 million years ago – in the Pliocene.