Why do species die out? This is the overarching question being asked by many leading researchers. Knowing more about what leads to a species' becoming extinct could enable us to do something about it. The passenger pigeon is a famous example and the species has been studied extensively.
The passenger pigeon (Ectopistes migratorius) was once found in huge numbers in North America. Records tell of passing flocks that darkened the skies for several days at a time. The species may have peaked at five billion individuals. A more conservative estimate is three billion.
When studying the effect of climate change on biodiversity, it is important to consider the climate near the ground (microclimate) which a plant or an animal actually experiences. Deep shady depressions, dense old forests or places close to water for example are always considerably cooler than their surroundings.
Tropical Depression 5S was consolidating just offshore Cape Leveque, Western Australia when NASA's Aqua satellite gathered temperature data that showed the strongest part of the depression remained over water.
At 10 a.m. EST (1500 UTC) on Jan. 9, Tropical Cyclone 5S formed with maximum sustained winds near 30 knots (34.5 mph/55.5 kph). It was centered near 16.2 degrees south latitude and 122.4 degrees east longitude. That's about 109 nautical miles north of Broome, Australia. It was moving to the west at 2 knots (3.3 mph/3.7 kph).
Researchers at Linköping University have studied how combinations of different environmental factors affect the chlorination of organic matter in soils. The results show that the supply of fresh organic compounds, which promote the growth of the microorganisms, increases chlorination. The discovery could mean that chlorine in ecosystems has a different significance than previously believed.
Scientists have found fossil evidence of deep-sea marine life burrowing up to eight metres below the seabed -- four times the previously observed depth for modern deep-sea life.
A team of scientists from the University of Leeds and the National Oceanography Centre examined remains of deep-sea burrows in rocky outcrops that were part of the ocean floor roughly 250 million years ago.
These outcrops are made up of sand-sheets that are widespread on modern ocean floors, suggesting that deep-sea burrowing marine life may be much more abundant than previously considered.
NASA-NOAA's Suomi NPP satellite passed over the Southern Indian Ocean and captured a visible image of Tropical Cyclone Ava as it continued to move away from southeastern Madagascar and weaken.
On Jan. 9, 2018 the Visible Infrared Imaging Radiometer Suite (VIIRS) instrument aboard NASA-NOAA's Suomi NPP satellite captured a visible image of Ava. The image showed most of the clouds and thunderstorms east of the center of circulation. The Joint Typhoon Warning Center (JTWC) noted that all other strong thunderstorms have dissipated from the system.
The endurance of emperor penguins, trudging through the perpetual Antarctic night to their breeding colonies, is legendary. Many trek more than 100 km from their ocean feeding grounds to rookeries at inland locations in preparation for mating; and the male partners often face a lengthy fast of more than 100 days while mating and incubating their eggs before embarking on the lengthy return journey. However, Gerald Kooyman from the University of California San Diego explains that not all emperor penguin colonies are as icebound.
From cars and bicycles to airplanes and space shuttles, manufacturers around the world are trying to make these vehicles lighter, which helps lower fuel use and lessen the environmental footprint.
EDMONTON (Jan. 9, 2018)--It's simple math, says scientist Clayton Lamb. The closer grizzly bears are to humans, the more ways there are for the bears to die. Put more simply, more roads equal fewer grizzly bears.
In a recent study examining a long-term DNA dataset of grizzly bear activity in British Columbia, Lamb and his colleagues conclusively determined what scientists have long suspected: higher road density leads to lower grizzly bear density, a critical problem for a species still rebounding from a long period of human persecution.
Location. Location. Location.
When buying and selling real estate, the phrase is a realtor's mantra.
It is also the central theme of a recently released journal report on factors that can predict heart failure risk.
According to new research in the American Heart Association journal, Circulation: Cardiovascular Quality and Outcomes, almost 5 percent of heart failure risk was connected to neighborhood factors.