Researchers have found that marine bacteria exploit resource patches efficiently by switching between attached and planktonic lifestyles, and fine-tuning the time spent on patches depending on their quality. Bacteria stayed longer on higher-quality patches, as predicted by patch use theory. Future studies in this area could help to predict the role of marine bacteria in the global carbon cycle.
Tectonic processes are thought to have triggered past ice ages, but how? A new analysis of mountain building in the maritime tropics of Southeast Asia attributes the last ice age, which reached a maximum 15,000 years ago, to increasing rock weathering in the rising island arc from Sumatra to New Guinea over the past 15 million years, with the first ice sheets in the Northern Hemisphere appearing about 3 million years ago.
The 2020 minimum extent, which was likely reached on Sept. 15, 2020 measured 1.44 million square miles (3.74 million square kilometers).
Sea ice is frozen ocean water that melts each summer, then refreezes each winter. “The year 2020 will stand as an exclamation point on the downward trend in Arctic sea ice extent.” Shrinking sea ice is just one of many…
High-severity wildfires in northern coastal California have been increasing by about 10 percent per decade since 1984, according to a new study.
The concentration of mercury in the fish in Alaska’s Yukon River may exceed the EPA’s human health criterion by 2050 if greenhouse gas emissions that cause global warming are not constrained, according to new research.