scholarly journals A Novel Archaeal Lineage in Boiling Hot Springs around Oyasukyo Gorge (Akita, Japan)

2021 ◽  
Vol 36 (4) ◽  
pp. n/a
Author(s):  
Katsuhiro Asamatsu ◽  
Kai Yoshitake ◽  
Makoto Saito ◽  
Wipoo Prasitwuttisak ◽  
Jun-ichiro Ishibashi ◽  
...  
Keyword(s):  
2017 ◽  
Vol 8 ◽  
Author(s):  
Eric D. Becraft ◽  
Jeremy A. Dodsworth ◽  
Senthil K. Murugapiran ◽  
Scott C. Thomas ◽  
J. Ingemar Ohlsson ◽  
...  

2020 ◽  
Author(s):  
Valerie De Anda ◽  
Lin-Xing Chen ◽  
Nina Dombrowski ◽  
Zhengshuang Hua ◽  
Hong-Chen Jiang ◽  
...  

Abstract Single carbon (C1) compounds such as methanol, methylamines and formaldehyde are ubiquitous in nature and they are large components of the carbon cycle. In anoxic environments C1-utilizing microbes (methylotrophs) play an important role in controlling global carbon degradation. Currently described anaerobic methylotrophs are limited to methanogenic archaea, acetogenic bacteria, and sulfate-reducing bacteria. Here, we report the first archaeal lineage outside of methanogenic taxa that are capable of anaerobic methylotrophy. Phylogenetic analyses suggest these archaea form a new phylum within the TACK superphylum, which we propose be named Brockarchaeota. A survey revealed Brockarchaeota are globally distributed in geothermal springs. Metabolic inference from 15 metagenome-assembled genomes from hot springs and deep-sea sediments indicates that Brockarchaeota are strict anaerobes. They contain a variety C1 metabolisms including the methanol and trimethylamine methyltransferases system, the ribulose bisphosphate pathway coupled with the non-oxidative pentoses phosphate pathway, and reductive glycine pathway. Brockarchaeota have an incomplete methyl-branch of the Wood-Ljungdahl pathway probably used for formaldehyde oxidation, since they lack several core genes involved in methanogenesis including methyl-CoM reductases. Brockarchaeota also appear to play an important role in the breakdown of plant-derived polysaccharides, especially cellulose, starch and xylan. Their broad distribution and their capacity to use both C1 compounds and complex polysaccharides via anaerobic metabolism suggest that the Brockarchaeota occupy previously overlooked roles in carbon cycling.


1945 ◽  
Vol 14 (2) ◽  
pp. 16-22
Author(s):  
William C. Johnstone
Keyword(s):  

2017 ◽  
Vol 1 (1) ◽  
pp. 1-6
Author(s):  
Jennifer M. Bernstein

Vickers Hot Springs is located near the rural Southern California town of Ojai, and local residents have long enjoyed soaking in the sulfuric pools. But as knowledge of the springs spread, the area saw increases in fights, traffic, burglaries, and drug use. In response, two residents purchased the land and committed to restore the property while allowing limited public access, subsequently generating a great deal of controversy within the community. Privatizing Vickers Hot Springs follows the archetypical lesson of Garrett Hardin's 1968 essay, “The Tragedy of the Commons.” Hardin stated that the problem for common-pool resources was that a finite amount of services are demanded by a potentially infinite number of users, who have little to gain by sacrificing for the common good. But Hardin's theory does not always apply. Many communities have come together to manage resources, often without government oversight. Thus, the question is not whether or not Hardin's theory is accurate, but rather “under what conditions it is correct and when it makes the wrong predictions.” Case studies provide nuance to the broad brushstrokes of a theory, and whether Hardin's parable is applicable depends on the particularities of the common property resource conflict. Employing the frameworks established by Hardin, Dietz et al., and Ostrom, this paper examines the management of Vickers Hot Springs within its broader social, ecological, and political context, asking whether the particular circumstances of this resource use conflict made privatization the most predictable outcome.


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