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4 days ago · Biosphere Transformations and the “Rare Earth” Hypothesis. Astrobiological interest in palaeobiology has tended to focus on major evolutionary innovations that have increased organismal and ecological complexity, transforming the character of the biosphere and hence its remotely detectable signatures.
4 days ago · Arctic, northernmost region of Earth, centred on the North Pole and characterized by distinctively polar conditions of climate, plant and animal life, and other physical features. The term is derived from the Greek arktos (“bear”), referring to the northern constellation of the Bear.
2 days ago · Global warming has a profound impact on the biosphere of the Antarctic Peninsula and nearby Archipelagos (IPCC 2022).Recent studies have demonstrated that the reduction in Antarctic ice sheets due to warming (Rignot et al. 2013) has led to the emergence of ice-free tundra zones (Paolo et al. 2015; Wouters et al. 2015; Bokhorst et al. 2019).
2 days ago · In high-latitude ecosystems, changes in the seasonal patterns of sea ice threaten predators such as polar bears and walruses; both species rely on broken sea ice for their hunting activities.
5 days ago · The predominant isoprenoid quinone of strain TK19101T was ubiquinone-10. The polar lipids of strain TK19101T comprised phosphatidylcholine, phosphatidylethanolamine, phosphatidylglycerol, phospholipid, and unknown polar lipid. Phylogenetic analysis based on 16S rRNA gene sequences showed that strain TK19101T belonged to the genus Mesobacterium.
1 day ago · Background The Atribacterota are widely distributed in the subsurface biosphere. Recently, the first Atribacterota isolate was described and the number of Atribacterota genome sequences retrieved from environmental samples has increased significantly; however, their diversity, physiology, ecology, and evolution remain poorly understood. Results We report the isolation of the second member of ...
5 days ago · DOI: 10.1101/2024.06.28.601307 Corpus ID: 270963173; Deep mutational scanning reveals sequence to function constraints for SWEET family transporters @article{Narayanan2024DeepMS, title={Deep mutational scanning reveals sequence to function constraints for SWEET family transporters}, author={Krishna K. Narayanan and Austin T. Weigle and Lingyun Xu and Xuenan Mi and Chen Zhang and Li-Qing Chen ...
