Nature Connects the Dots, Even if We don’t – Bird Migrations delayed by Climate Change

BBC

Geese, ducks and swans that spend winter in wetlands of Northern Europe are changing their migration patterns as temperatures rise, say scientists.

Researchers in Finland found some waterfowl delayed migrations by up to a month compared with 30 years ago.

The Wildfowl and Wetlands Trust (WWT) says that numbers of some very familiar species are decreasing in the UK, as many birds do not fly as far.

The study is published in the Journal of Ornithology.

NASA:2008 – Natural Systems show warming

A new NASA-led study shows human-caused climate change has made an impact on a wide range of Earth’s natural systems, including permafrost thawing, plants blooming earlier across Europe, and lakes declining in productivity in Africa.

Cynthia Rosenzweig of NASA’s Goddard Institute for Space Science in New York and scientists at 10 other institutions have linked physical and biological impacts since 1970 with rises in temperatures during that period. The study, to be published May 15 in the journal Nature, concludes human-caused warming is resulting in a broad range of impacts across the globe.

“This is the first study to link global temperature data sets, climate model results, and observed changes in a broad range of physical and biological systems to show the link between humans, climate, and impacts,” said Rosenzweig, lead author of the study.

Observed impacts included changes to physical systems, such as glaciers shrinking, permafrost melting, and lakes and rivers warming. Biological systems also were impacted in a variety of ways, such as leaves unfolding and flowers blooming earlier in the spring, birds arriving earlier during migration periods, and plant and animal species moving toward Earth’s poles and higher in elevation. In aquatic environments such as oceans, lakes, and rivers, plankton and fish are shifting from cold-adapted to warm-adapted communities.

The team conducted a “joint attribution” study. They showed that at the global scale, about 90 percent of observed changes in diverse physical and biological systems are consistent with warming. Other driving forces, such as land use change from forest to agriculture, were ruled out as having significant influence on the observed impacts.

Associated Press:

Animals across the world are fleeing global warming by heading north much faster than they were less than a decade ago, a new study says.

About 2,000 species examined are moving away from the equator at an average rate of more than 15 feet per day, about a mile per year, according to new research published Thursday in the journal Science which analyzed previous studies. Species are also moving up mountains to escape the heat, but more slowly, averaging about 4 feet a year.

The species — mostly from the Northern Hemisphere and including plants — moved in fits and starts, but over several decades it averages to about 8 inches an hour away from the equator. “The speed is an important issue,” said study main author Chris Thomas of the University of York. “It is faster than we thought.”