Climate change has had a significant effect on mountain vegetation at low elevations in the past 60 years, according to a study done by the University of California at Davis, University of Wisconsin-Madison, and U.S. Geological Survey.
This information may guide future conservation efforts in helping decision makers develop regional landscape predictions about biological responses to climate changes. (more…)
*Researchers measure survival, reproduction of thousands of arctic and alpine plants over six years*
As Earth’s climate warms, species are expected to shift their geographical ranges away from the equator or to higher elevations.
While scientists have documented such shifts for many plants and animals, the ranges of others seem stable. (more…)
About the image: A now dry Colorado River delta branches into the Baja/Sonoran Desert near the Sea of Cortez. Image credit: Pete McBride
Rivers and streams supply the lifeblood to ecosystems across the globe, providing water for drinking and irrigation for humans as well as a wide array of life forms from single-celled organisms up to the fish humans eat.
But humans and nature itself are making it tough on rivers to continue in their central role to support fish species, according to new research by a team of scientists including John Sabo, a biologist at Arizona State University.
Globally, rivers and streams are being drained due to human use and climate change. These and other human impacts alter the natural variability of river flows.
Some affected rivers have dried and no longer run, while others have seen increases in the variability of flows due to storm floods. (more…)
Sixty-three percent of Americans believe that global warming is happening, but many do not understand why, according to a national study conducted by researchers at Yale University.
WASHINGTON — Scientists have long known that heat-absorbing components of Earth’s atmosphere, such as clouds and certain 
gases, prevent our planet from being an ice-covered ball. Now a study, for the first time, comprehensively calculates the relative contributions of the components responsible for that heating, known as the greenhouse effect.
Besides clarifying an important aspect of climate science, the study also demonstrates that rising concentrations of one heat-trapping gas — carbon dioxide — leads to much more greenhouse warming than just the heat the gas absorbs directly itself.
Various studies have looked at the contributions of water vapor, CO2, and other greenhouse gases. But none had systematically estimated the contributions of each of the main players, says climate scientist Gavin Schmidt of NASA Goddard Institute for Space Studies, and lead author of the new research. (more…)
*Researchers at University of California, Berkeley, work with Microsoft Research to analyze vast amounts of data without supercomputers.*
BERKELEY, Calif. — Studying the environment would be simple if it weren’t for one thing: Even an isolated ecosystem is unbelievably complicated. Factors to study include water systems, plant life cycles, carbon dioxide fluctuations, resource use by humans, and far more — and each can be studied at the scale of a plant or of the planet, and measured in an instant or over decades. (more…)
*Changes in population, including aging and urbanization, could affect global carbon dioxide emissions*
Changes in the human population, including aging and urbanization, could significantly affect global emissions of carbon dioxide over the next 40 years, according to research results published this week. (more…)
COLUMBIA, Mo. — When people discuss climate change, they usually think of impacts above ground, such as atmospheric changes, rising ocean levels, or melting glaciers. Less attention is paid to the effects right under their feet. Now, with the help of a $1.2 million grant from the federal Plant Feedstock Genomics for Bioenergy program, University of Missouri researchers are peering underground to see how climate change affects plant roots.
