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107 Aktuelle Fachpublikationen zum Thema temperature

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[Special Issue Research Article] Structure and function of the global ocean microbiome

22.05.2015 | Shinichi Sunagawa; Luis Pedro Coelho; Samuel Chaffron; Jens Roat Kultima; Karine Labadie; Guillem Salazar; Bardya Dj ..., Science , 2015

Microbes are dominant drivers of biogeochemical processes, yet drawing a global picture of functional diversity, microbial community structure, and their ecological determinants remains a grand challenge. We analyzed 7.2 terabases of metagenomic data from 243 Tara Oceans samples from 68 locations ...

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[Report] The dominant role of semi-arid ecosystems in the trend and variability of the land CO2 sink

22.05.2015 | Anders Ahlström; Michael R. Raupach; Guy Schurgers; Benjamin Smith; Almut Arneth; Martin Jung; Markus Reichstein; Jo ..., Science , 2015

The growth rate of atmospheric carbon dioxide (CO2) concentrations since industrialization is characterized by large interannual variability, mostly resulting from variability in CO2 uptake by terrestrial ecosystems (typically termed carbon sink). However, the contributions of regional ecosystems ...

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[Report] A virus that infects a hyperthermophile encapsidates A-form DNA

22.05.2015 | Frank DiMaio; Xiong Yu; Elena Rensen; Mart Krupovic; David Prangishvili; Edward H. Egelman, Science , 2015

Extremophiles, microorganisms thriving in extreme environmental conditions, must have proteins and nucleic acids that are stable at extremes of temperature and pH. The nonenveloped, rod-shaped virus SIRV2 (Sulfolobus islandicus rod-shaped virus 2) infects the hyperthermophilic acidophile ...

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[Report] Whole-body endothermy in a mesopelagic fish, the opah, Lampris guttatus

15.05.2015 | Nicholas C. Wegner; Owyn E. Snodgrass; Heidi Dewar; John R. Hyde, Science , 2015

Endothermy (the metabolic production and retention of heat to warm body temperature above ambient) enhances physiological function, and whole-body endothermy generally sets mammals and birds apart from other animals. Here, we describe a whole-body form of endothermy in a fish, the opah (Lampris ...

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[Report] Direct observation of hierarchical protein dynamics

01.05.2015 | Józef R. Lewandowski; Meghan E. Halse; Martin Blackledge; Lyndon Emsley, Science , 2015

One of the fundamental challenges of physical biology is to understand the relationship between protein dynamics and function. At physiological temperatures, functional motions arise from the complex interplay of thermal motions of proteins and their environments. Here, we determine the hierarchy ...

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[Perspective] Biogeochemical tales told by isotope clumps

24.04.2015 | Benjamin H. Passey, Science , 2015

How do you take a dinosaur's temperature, reconstruct the elevation histories of Earth's great mountain ranges, probe the workings of photosynthesis, and confirm biological origins of a greenhouse gas? Increasingly, the answer lies in clumps. Clumped isotope geochemistry (1) is the latest branch ...

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[Editors' Choice] Ordering up just the right temperature

24.04.2015 | Marc S. Lavine, Science , 2015

Author: Marc S. Lavine

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[Report] The weakening summer circulation in the Northern Hemisphere mid-latitudes

17.04.2015 | Dim Coumou; Jascha Lehmann; Johanna Beckmann, Science , 2015

Rapid warming in the Arctic could influence mid-latitude circulation by reducing the poleward temperature gradient. The largest changes are generally expected in autumn or winter, but whether significant changes have occurred is debated. Here we report significant weakening of summer circulation ...

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[Report] Eddy-driven subduction exports particulate organic carbon from the spring bloom

10.04.2015 | Melissa M. Omand; Eric A. D’Asaro; Craig M. Lee; Mary Jane Perry; Nathan Briggs; Ivona Cetinić; Amala Mahadevan, Science , 2015

The export of particulate organic carbon (POC) from the surface ocean to depth is traditionally ascribed to sinking. Here, we show that a dynamic eddying flow field subducts surface water with high concentrations of nonsinking POC. Autonomous observations made by gliders during the North Atlantic ...

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[Report] Molecular nitrogen in comet 67P/Churyumov-Gerasimenko indicates a low formation temperature

10.04.2015 | M. Rubin; K. Altwegg; H. Balsiger; A. Bar-Nun; J.-J. Berthelier; A. Bieler; P. Bochsler; C. Briois; U. Calmonte; M. ..., Science , 2015

Molecular nitrogen (N2) is thought to have been the most abundant form of nitrogen in the protosolar nebula. It is the main N-bearing molecule in the atmospheres of Pluto and Triton and probably the main nitrogen reservoir from which the giant planets formed. Yet in comets, often considered the ...

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