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Invisible Invasive Species Altering Ecosystems

By Guest PostDecember 10, 2010Environmentair temperatures, asian carp, australia, blue green algae, brackish diatom, climate change, cyanobacteria, dramatic fashion, ecology, ecosystems, elena litchman, european lakes, global change, great lakes, gypsy moths, invasive microbes, invasive species, lake michigan, macroorganism, malaria, microbial invaders, nitrogen fixing rhizobium, nonpathogenic microbes, north american, pathogenic parasitic fungus, portugal, scientific research, subtropical, temperate latitudes, tropical, zebra mussels

Elena Litchman, associate professor of ecology, who works at MSU's Kellogg Biological Station. Image credit: Michigan State University

EAST LANSING, Mich. — While Asian carp, gypsy moths and zebra mussels hog invasive-species headlines, many invisible invaders are altering ecosystems and flourishing outside of the limelight.

A study by Elena Litchman, Michigan State University associate professor of ecology, sheds light on why invasive microbial invaders shouldn’t be overlooked or underestimated.

“Invasive microbes have many of the same traits as their larger, ‘macro’ counterparts and have the potential to significantly impact terrestrial and aquatic ecosystems,” said Litchman, whose research appears in the December issue of Ecology Letters. “Global change can exacerbate microbial invasions, so they will likely increase in the future.” (more…)

Rewarding Eco-Friendly Farmers Can Help Combat Climate Change

By Guest PostDecember 2, 2010Environmentatmosphere, carbon dioxide, chesapeake bay, cier, climate change, combat, eco-friendly, ecosystem markets, farmers, fertilizer, fertilizer run-off, greenhouse gas, management practices, maryland, maryland farmers, matthias ruth, nitrogen, nutrient trading market, phosphorous, techniques, total maximum daily load, trading market

*UMD Study Advises State on Creation of ‘Nutrient Trading Market’*

COLLEGE PARK, Md. – Financially rewarding farmers for using the best fertilizer management practices can simultaneously benefit water quality and help combat climate change, finds a new study by the University of Maryland’s Center for Integrative Environmental Research (CIER). (more…)

Earth’s Lakes Warming Due to Climate Change

By Guest PostNovember 26, 2010Environmentalgal blooms, alpine lake, black, caspian seas, climate change, emerald bay, global survey, great lakes, kazakhstan, lake tahoe, lakes, lakes warming, natural ecosystem, North America, northern europe, northern hemisphere, philipp schneider, satellite data, simon hook, surface temperatures, temperature, trends

Lake Tahoe, seen here from Emerald Bay, was one of the primary validation sites for the global lake study. The lake, which straddles the borders of California and Nevada, is the largest alpine lake in North America. Image credit: NASA-JPL

WASHINGTON – In the first comprehensive global survey of temperature trends in major lakes, researchers have determined that Earth’s largest lakes have warmed during the past 25 years in response to climate change.

Philipp Schneider and Simon Hook of NASA’s Jet Propulsion Laboratory in Pasadena, Calif., used satellite data to measure the surface temperatures of 167 large lakes worldwide.

They reported an average warming rate of 0.45 degrees Celsius (0.81 degrees Fahrenheit) per decade, with some lakes warming as much as 1 degree Celsius (1.8 degrees Fahrenheit) per decade. The warming trend was global, and the greatest increases were in the mid- to high-latitudes of the Northern Hemisphere. (more…)

Biologists Report More Bad News for Polar Bears

By Guest PostNovember 24, 2010Environment3-d computer models, brown bears, climate change, ecology, Environment, extreme environment, genetic studies, global warming, graham slater, grizzly bears, ice ages, polar bears, van valkenburgh, vegetables

*Climate change will force them south, where they are unsuited for the diet*

A polar bear breaks through thin Arctic Ocean ice Aug. 23, 2009. Image credit: Canadian Coast Guard/USGS

Will polar bears survive in a warmer world? UCLA life scientists present new evidence that their numbers are likely to dwindle.

As polar bears lose habitat due to global warming, these biologists say, they will be forced southward in search of alternative sources of food, where they will increasingly come into competition with grizzly bears.

To test how this competition might unfold, the UCLA biologists constructed three-dimensional computer models of the skulls of polar bears and grizzly bears — a subspecies of brown bears — and simulated the process of biting. The models enabled them to compare the two species in terms of how hard they can bite and how strong their skulls are. (more…)

Water Flowing Through Ice Sheets Accelerates Warming, Could Speed Up Ice Flow, Says New Study

By Guest PostNovember 7, 2010Environmentclimate change, climate warming, conventional thermal models, crevasses, fractures, greenland, ice flows, ice sheet, ice sheets, konrad steffen, melt water, moulins, thermal models, thomas phillips

Melt water flowing through ice sheets via crevasses, fractures and large drains called moulins can carry warmth into ice sheet interiors, greatly accelerating the thermal response of an ice sheet to climate change, according to a new study involving the University of Colorado at Boulder.

The new study showed ice sheets like the Greenland Ice Sheet can respond to such warming on the order of decades rather than the centuries projected by conventional thermal models. Ice flows more readily as it warms, so a warming climate can increase ice flows on ice sheets much faster than previously thought, said the study authors. (more…)

Climate Change: Cultural Shift Needed Similar to Smoking, Slavery

By Guest PostOctober 28, 2010Culture, Environmentandy hoffman, attitudes, cigarette smoking, climate change, cultural attitudes, cultural shift, earth, ecological systems, erb institute, fossil fuels, holcim professor, moral problem, planetary scale, scientific evidence, slavery, university of michigan

ANN ARBOR, Mich.— Despite scientific evidence of climate change, it will take a significant cultural shift in attitudes to address the situation, says a University of Michigan researcher.

The shift would be much like what has happened with recent cigarette smoking bans and even similar to the abolition of slavery in the 19th century.

“The present reality is that we tend to overlook the social dimensions of environmental issues and focus strictly on their technological and economic aspects,” said Andy Hoffman, the Holcim (U.S.) Professor of Sustainable Enterprise at the Ross School of Business and School of Natural Resources and Environment. “To properly address climate change, we must change the way we structure our organizations and the way we think as individuals. (more…)

Mountain Vegetation Impacted by Climate Change

By Guest PostOctober 26, 2010Environmentclimate change, ecological systems, ecosystems, forests, herbaceous, low elevations, mountain vegetation, oregon, siskiyou mountains, species, stress-adapted, stresses, U.S. Geological Survey

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…)

Climate Change May Create Tipping Points for Populations, Not Just Species

By Guest PostOctober 23, 2010Environmentalpine, Arctic, biological effects of climate change, climate change, climate warms, daniel doak, duke university, earth, ecological challenges, ecologist, mountains of colorado, national science foundation, new mexico, nsf, plants, plants and animals, saran twombly, william morris

*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…)

Tag Archives: climate change