The Goddard Space Flight Center at NASA just put out this excellent video about pollination, phenology and the effects of climate change. Although NASA has satellite data showing that spring green-up has been occurring a half-day earlier each year, it’s a bit harder to figure out whether a corresponding change in phenology is occurring among pollinators. The video shows beekeepers–scientists…
Sorghum grown under acacia and palm trees in Burkina Faso. According to a new study by scientists at the World Forestry Centre in Nairobi, Kenya, we’ve underestimated that amount of trees worldwide that are grown in agricultural areas. Using satellite imagery, the scientists show at the 2nd World Congress of Agroforestry this week in Nairobi that trees cover more than…
The 10th International Congress of Ecology is taking place this week in Brisbane, Australia. This conference happens once every four years and aims to bring together ecologists from all corners of the world. The theme is “Ecology in a Changing Climate – Two hemispheres, one globe.” With the conference being held down under and hosted by the Ecological Society of Australia…
The debate about climate change has focused on one polarizing gas: carbon dioxide. CO2 and its portrayal to the general public is controversial because on one hand, it’s essential for all life, since plants need to breathe too. But on the other hand it’s a greenhouse gas that traps heat in our atmosphere, and in some instances –such as new…
Pearl mussels can vary greatly in lifespan over latitudinal and temperature gradients. Bergmann’s rule within physiological ecology postulates that animals get larger at higher latitudes and altitudes. Similarly, the temperature-size rule predicts that although animals grow more slowly at cold temperatures, they reach a larger adult size (but see Angiletta and Dunham 2003). A study published today in the Proceedings…
As plants become starved for CO2, rock weathering diminishes. Credit: study coauthor David Beerling Earth is currently in an ice age. (People, especially climate change naysayers, sometimes forget that.) The growth of the Antarctic ice sheet began about 25 million years ago, and by about 3 million years ago we had a full-blown ice age. What has remained a mystery…
Some existing projections of global warming predict that by the year 2100, global sea levels will have risen by one meter due to polar ice cap melting and water expansion caused by rising temperatures. In a paper this week in Nature Geoscience, however, researchers determined that given our current levels of atmospheric carbon dioxide, our seas should actually be 25…
If we want to convince people to take action against global warming, maybe we need to take advice from advertising. A report by the nonprofit EcoAmerica, as reported by The New York Times in early May, suggests that terms like “greenhouse gas” and “carbon dioxide” turn people off. Instead, they say, climate activists should change their rhetoric, emphasizing a “move…
Geoengineering is the idea that humans can slow, stop or reverse the effects of climate change by altering the composition of Earth’s atmosphere and biosphere. While controversial, these methods, including reducing sun exposure by injecting aerosols into the atmosphere or using giant mirrors to reflect the sun’s rays, were identified as a high-priority area for research by the G8-5 nations….
Jane Lubchenco, the administrator of NOAA (who, by the by, is a former president of ESA), gave a great interview on this week’s Living on Earth series. If you don’t listen to Living on Earth, it’s an excellent weekly radio show by Public Radio International that focuses on environmental issues. Lubchenco told the Living on Earth folks that she wants…
The EPA released a report yesterday that proposes to change the rules of the biofuels game. The report, titled “Regulation of Fuels and Fuel Additives: Changes to Renewable Fuel Standard Program,” examines the lifecycle of corn-for-ethanol practices and sets the “payback” period of carbon emissions for corn-for-ethanol fuel as 33 years. The payback period means that at first, corn-for-ethanol practices…
Climate change has the potential to not only increase average temperatures around the world, but also to increase the likelihood and severity of now-rare temperature events, like heat waves. The fate of many animal populations, therefore, can hinge on their ability to tolerate (relative) extreme heat. In the April issue of Functional Ecology, scientists explore the possible responses of animal…