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ScienceDaily: Top Environment News |
| Mass die-off of Magellanic penguins seen during 2019 heat wave Posted: 04 Jan 2022 01:34 PM PST In 2019, researchers witnessed the consequences of an extreme heat event at Punta Tombo in Argentina, one of the world's largest breeding colonies for Magellanic penguins. On Jan. 19, temperatures at the site spiked in the shade to 44 C, or 111.2 F, killing at least 354 penguins. Nearly three-quarters of the penguins that died were adults, many of which likely died of dehydration, based on postmortem analyses. |
| How plants respond to heat stress Posted: 04 Jan 2022 09:06 AM PST Plants, like other organisms, can be severely affected by heat stress. To increase their chances of survival, they activate the heat shock response, a molecular pathway also employed by human and animal cells for stress protection. Researchers have now discovered that plant steroid hormones can promote this response in plants. |
| Sustainable silk material for biomedical, optical, food supply applications Posted: 04 Jan 2022 08:22 AM PST Researchers discuss the properties of silk and recent and future applications of the material. It has been used in drug delivery and is ideal for wearable and implantable health monitoring sensors. Silk is also useful in optics and electronics and more recently has come to the forefront of sustainability research. The use of silk coatings may also reduce food waste, which is a significant component of the global carbon footprint. |
| Solving the disappearance of bears and lions with ancient DNA Posted: 04 Jan 2022 07:26 AM PST Researchers suggest a change in climate is the likely cause of the mysterious disappearance of ancient lions and bears from parts of North America for a thousand years or more prior to the last Ice Age. |
| Climate change, invasive species drive native trout declines Posted: 04 Jan 2022 06:56 AM PST Researchers have found that climate change drives native trout declines by reducing stream habitat and facilitating the expansion of invasive trout species. |
| Inverted order: The direction of your DNA may be as important as which parent it came from Posted: 04 Jan 2022 06:55 AM PST Researchers generated mice with a specific DNA sequence inverted to determine if orientation affects expression of a gene called H19. Expression can also be impacted if the surrounding DNA is altered by a process called methylation. Interestingly, methylation was only relevant when the inverted sequence was inherited from the father. When inherited from the mother, the inversion had the opposite effect on H19 expression, suggesting a more complex mechanism is at play. |
| Predator interactions chiefly determine where Prochlorococcus thrive Posted: 03 Jan 2022 02:22 PM PST Where the microbe Prochlorococcus lives is not determined primarily by temperature, as previously thought. A study finds a relationship with a shared predator actually sets the microbe's range. The findings could help scientists predict how Prochlorococcus populations will shift with climate change. |
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