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ScienceDaily: Earth & Climate News |
Tigers cling to survival in Sumatra's increasingly fragmented forests Posted: 05 Dec 2017 02:02 PM PST A research expedition tracked endangered tigers through the Sumatran jungles for a year and found tigers are clinging to survival in low density populations. The study found that well-protected forests are disappearing and are increasingly fragmented: Of the habitat tigers rely on in Sumatra, 17 percent was deforested between 2000 to 2012 alone. Their findings have renewed fears about the possible extinction of the elusive predators. |
Amazon floodplain trees emit as much methane as all Earth’s oceans combined Posted: 05 Dec 2017 11:26 AM PST New research solves mystery of missing methane source in the Amazon Rainforest. |
Cooling climate drove evolution of Tasmanian Devil and its relatives Posted: 05 Dec 2017 11:25 AM PST A big drop in global temperatures 12-14 million years ago may explain the evolutionary success of Australia's unique marsupial carnivores, a new study has found. |
Variation within species is critical aspect of biodiversity Posted: 05 Dec 2017 09:00 AM PST Concerns about biodiversity tend to focus on the loss of species from ecosystems, but a new study suggests that the loss of variation within species can also have important ecological consequences. |
Smaller branches pack the fastest, biggest fire-spreading punch Posted: 05 Dec 2017 09:00 AM PST The diameter of the branches that are burning is the biggest single factor behind which ones will form embers the most quickly and how much fire-starting energy they'll pack, preliminary findings of a new study indicate. |
Estrogens and changes in heart physiology linked Posted: 05 Dec 2017 09:00 AM PST Scientists have created zebrafish mutants in four different receptors -- found inside or on the surface of cells -- that respond to estrogens, and they have used the mutants to help unravel a novel mechanism of estrogen action on heart physiology. Broader use of the mutants may have significant implications for studies of estrogenic environmental endocrine disruptors. |
Beyond wind speed: A new measure for predicting hurricane impacts Posted: 05 Dec 2017 09:00 AM PST What if there was a better way to forecast and communicate hurricanes' damaging economic impacts, before they happen? Civil engineers have developed an innovative new approach to assessing the resiliency of coastal communities to hurricanes. They've created a 'multi-hazard hurricane impact level model,' which estimates economic damages to be caused by storms, before they happen. |
Meteorite analysis shows reduced salt is key in Earth's new recipe Posted: 05 Dec 2017 07:42 AM PST Scientists have found the halogen levels in the meteorites that formed the Earth billions of years ago are much lower than previously thought. |
Lemur study highlights role of diet in shaping gut microbiome Posted: 05 Dec 2017 07:41 AM PST A study of the bacteria in the guts of three lemur species offers new insights into the role of diet in shaping these microbial ecosystems -- and how these microbes may relate to primate health. |
Once they start composting, people find other ways to be 'green' Posted: 05 Dec 2017 07:41 AM PST Composting food scraps can prompt people to make other earth-friendly choices, new research has found. When one California city started a composting program to keep food waste out of its landfill, residents began to pay more attention to other environmentally sound practices, such as taking shorter showers. |
Posted: 05 Dec 2017 06:36 AM PST Scientists have shown for the first time that dark fiber -- the vast network of unused fiber-optic cables installed throughout the country and the world -- can be used as sensors for detecting earthquakes, the presence of groundwater, changes in permafrost conditions, and a variety of other subsurface activity. |
Future arctic sea ice loss could dry out California Posted: 05 Dec 2017 06:21 AM PST Arctic sea ice loss of the magnitude expected in the next few decades could impact California's rainfall and exacerbate future droughts, according to new research. |
Fish exposed to treated wastewater have altered behavior Posted: 05 Dec 2017 06:21 AM PST Researchers have found that fish living downstream from a wastewater treatment plant showed changes to their normal behavior --- ones that made them vulnerable to predator --- when exposed to elevated levels of antidepressant drugs in the water. |
Hearing hybrid and electric vehicles while quieting noise pollution Posted: 05 Dec 2017 06:15 AM PST Low-emission vehicles are considered too quiet for hearing-impaired pedestrians, so the European Union is mandating that they be equipped with acoustic vehicle alerting systems. With these alert systems would come a marked increase in the amount of noise on the roads across Europe. |
How ant colonies behave in different environments Posted: 05 Dec 2017 06:15 AM PST A new article finds that some ant colonies defend more gallantly than others, revealing that colonies themselves may have personalities. Trees that have more active, aggressive colonies have less leaf damage, suggesting that colony personality may play an important role in plant health and survival. |
Despite city tree benefits, California urban canopy cover per capita lowest in US Posted: 04 Dec 2017 02:28 PM PST Trees in California communities are working overtime. From removing carbon dioxide and pollutants from the air, intercepting rainfall and increasing property values, California's 173.2 million city trees provide ecosystem services valued at $8.3 billion a year. However, according to a recent study, more benefits could be realized if the Golden State's urban forests didn't have the lowest canopy cover per capita in the nation. |
The Patterns of climate change Posted: 04 Dec 2017 12:07 PM PST Researchers have developed a technique to monitor and predict how plant species will respond to climate change. The experiment was conducted in an area the size of two football pitches within the Garraf National park south west of Barcelona. The landscape is mostly a Mediterranean scrubland, featuring thickets of low rise shrubs and herbs such as rosemary and thyme, and home to many protected species. |
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