Results 61 to 70 of about 6,420 (208)

Evidence of Vent-Adaptation in Sponges Living at the Periphery of Hydrothermal Vent Environments: Ecological and Evolutionary Implications

Frontiers in Microbiology, 2020
The peripheral areas of deep-sea hydrothermal vents are often inhabited by an assemblage of animals distinct to those living close to vent chimneys.
Magdalena N. Georgieva, Sergi Taboada, Sergi Taboada, Sergi Taboada, Ana Riesgo, Cristina Díez-Vives, Fabio C. De Leo, Fabio C. De Leo, Rachel M. Jeffreys, Jonathan T. Copley, Crispin T. S. Little, Crispin T. S. Little, Pilar Ríos, Pilar Ríos, Javier Cristobo, Javier Cristobo, Jon T. Hestetun, Adrian G. Glover   +17 more
doaj   +1 more source

Interplanetary frontiers: terraforming from an invasion science perspective

Oikos, EarlyView.
The pursuit of a multi‐planetary existence represents one of humanity's greatest frontiers. If applied justly, it offers an opportunity to extend its civilization's lifespan amid escalating sustainability crises on Earth. One approach increasingly gaining traction is terraforming, a hitherto theoretical ecological and evolutionary experiment revolving ...
Teun Everts, Ronaldo Sousa, Phillip J. Haubrock   +2 more
wiley   +1 more source

The Climate Niche Pressure on the Yunnan–Guizhou Plateau Predominates the Diversification of Advertisement Calls in Frogs (Leptobrachella)

Integrative Zoology, EarlyView.
The diversification of advertisement calls is largely driven by climatic niche differentiation. Our results provide acoustic evidence for studies on ecological speciation in anurans.
Tuo Shen, Shize Li, Jing Liu, Lang Mu, Guangmei Yang, Yixin Diao, Haijun Su, Bin Wang   +7 more
wiley   +1 more source

Topology‐based Visual Analysis of Hydrothermal Plumes

Computer Graphics Forum, EarlyView.
Abstract Hydrothermal plumes are turbulent structures of intense heat and mineral smoke that rise and disperse into the deep ocean. Existing models generally characterize these systems as a single axisymmetric plume originating from a point source. However, this assumption breaks down in weakly venting, spatially distributed systems, where low‐flux ...
Adhitya Kamakshidasan, Tushar Jain, Karen Bemis, Valerio Pascucci   +3 more
wiley   +1 more source

A distinct gene expression mechanism for d‐amino acid utilization in hyperthermophilic archaeon Pyrococcus horikoshii

The FEBS Journal, EarlyView.
The genes PH0137, PH0138, and PH0140 form a cluster in the genome of Pyrococcus horikoshii. The PH0140 gene encodes a transcription factor identified as a d‐amino acid‐responsive regulatory protein (DARP). In feast mode, l‐Ile‐bound DARP binds to the promoter and represses transcription of PH0137 and PH0138. In famine mode, DARP binds to d‐allo‐Ile and
Ryushi Kawakami, Tomoki Kawase, Taira Uehara, Haruhiko Sakuraba, Tomohiko Matsuzawa, Junji Hayashi, Toshihisa Ohshima   +6 more
wiley   +1 more source

Endemism shapes viral ecology and evolution in globally distributed hydrothermal vent ecosystems

Nature Communications
Viruses are ubiquitous in deep-sea hydrothermal vents, where they influence microbial communities and biogeochemistry. Yet, viral ecology and evolution remain understudied in these environments.
Marguerite V. Langwig, Faith Koester, Cody Martin, Zhichao Zhou, Samantha B. Joye, Anna-Louise Reysenbach, Karthik Anantharaman   +6 more
doaj   +1 more source

On the Potential for Bioenergy and Biofuels from Hydrothermal Vent Microbes [PDF]

Oceanography, 2012
The discovery of deep-sea hydrothermal vents caused scientists to reconsider their notions about life in the deep sea. In these seemingly inhospitable environments, free-living microbes, as well as microbial-animal symbioses, thrive in the warm waters ...
Peter R. Girguis, James F. Holden
doaj  

Prebiotic aqueous reactions catalyzed by native nickel without hydrogen

The FEBS Journal, EarlyView.
Serpentinizing (H2‐producing) hydrothermal vents are candidate environments for metabolic origin. They generate highly reducing conditions that convert CO2 to formate and methane in abiotic reactions resembling reactions of the acetyl‐CoA pathway of CO2 fixation. They also contain natural catalysts. Native nickel (Ni0), like Fe0, Co0, and their alloys,
Carolina Garcia Garcia, Max Brabender, William F. Martin   +2 more
wiley   +1 more source

Fluid ingress and surface wettability of 3D‐printed closed‐hollow obturator specimens across material types and printing orientations

Journal of Prosthodontics, EarlyView.
Abstract Purpose To evaluate the effects of material type, printing orientation, and thermocycling on cumulative fluid ingress in three‐dimensional (3D)‐printed closed‐hollow obturator specimens and to compare water contact angle among material–printing orientation groups.
Wisarut Prawatvatchara, Soranun Chantarangsu, Somphote Angkanawiriyarak, Raiwint Khunwisetkul, Kwanwong Boonpitak, Visaluk Punyawattananon, Cheewin Towithelertkul   +6 more
wiley   +1 more source

The Role of Oxidative Stress in Periodontitis

Journal of Periodontal Research, EarlyView.
Oxidative stress is involved in multiple chemical reactions that take place in different intracellular organelles: mitochondria, rough endoplasmic reticulum, peroxisomes, autophagy, and aging, and can be influenced by exogenous factors: nutrition, physical activity, psychological status, environmental conditions, microbiome, and drugs.
Pedro Bullon, Francesca Giampieri, Beatriz Bullon, Maurizio Battino   +3 more
wiley   +1 more source