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| Big gaps in quest to sequence genomes of all animals Posted: 06 Dec 2021 06:06 AM PST Efforts to sequence the genomes of the world's animals tend to focus on those that most resemble humans with the work conducted almost entirely in the Global North, according to new analysis. Researchers warn current efforts are overlooking huge swathes of diversity and opportunity. Their analysis found that nearly 3,300 animal species have had their genomes sequenced and assembled, a process that gives organizational context to an organism's DNA. While the rate is picking up, the number is small in comparison to the world's 1.66 million animal species, and vertebrates make up the lion's share of current sequences. They account for 54% of all the assemblies, despite representing only 3.9% of animal species. In contrast, the invertebrates of the Arthropoda phylum, which includes insects and spiders, comprise only 34% of current datasets while representing 78.5% of all species. |
| X-ray laser reveals how radiation damage arises Posted: 06 Dec 2021 06:06 AM PST An international research team has used the X-ray laser European XFEL to gain new insights into how radiation damage occurs in biological tissue. The study reveals in detail how water molecules are broken apart by high-energy radiation, creating potentially hazardous radicals and electrically charged ions, which can go on to trigger harmful reactions in the organism. |
| Microplastic pollution aids antibiotic resistance Posted: 06 Dec 2021 05:02 AM PST Microplastics dispersed in the environment may enhance antibiotic resistance. A study found the chemical-leaching plastics draw bacteria and other vectors and make them susceptible to antibiotic resistant genes. |
| Trees are biggest methane ‘vents’ in wetland areas – even when they’re dry Posted: 05 Dec 2021 06:24 PM PST Most of the methane gas emitted from Amazon wetlands regions is vented into the atmosphere via tree root systems -- with significant emissions occurring even when the ground is not flooded, say researchers. |
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