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  • Nature Publishing Group  (4,219)
  • 2005-2009  (4,219)
  • 2005  (4,219)
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  • 2005-2009  (4,219)
Year
  • 1
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    Relatedness among east African coelacanths (2005)
    Nature Publishing Group
    In:  Nature, 435 (7044). p. 901.
    Details
    Publication Date: 2019-11-11
    Description: Scattered groups of these ancient fish may all stem from a single remote population. Coelacanths were discovered in the Comoros archipelago to the northwest of Madagascar in 1952. Since then, these rare, ancient fish have been found to the south off Mozambique, Madagascar and South Africa, and to the north off Kenya and Tanzania — but it was unclear whether these are separate populations or even subspecies. Here we show that the genetic variation between individuals from these different locations is unexpectedly low. Combined with earlier results from submersible and oceanographic observations1, 2, our findings indicate that a separate African metapopulation is unlikely to have existed and that locations distant from the Comoros were probably inhabited relatively recently by either dead-end drifters or founders that originated in the Comoros.
    Type: Article , PeerReviewed
    Format: text
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  • 2
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    North Pacific seasonality and the glaciation of North America 2.7 million years ago (2005)
    Nature Publishing Group
    In:  Nature, 433 . pp. 821-825.
    Details
    Publication Date: 2019-09-23
    Description: In the context of gradual Cenozoic cooling, the timing of the onset of significant Northern Hemisphere glaciation 2.7 million years ago is consistent with Milankovitch's orbital theory, which posited that ice sheets grow when polar summertime insolation and temperature are low. However, the role of moisture supply in the initiation of large Northern Hemisphere ice sheets has remained unclear. The subarctic Pacific Ocean represents a significant source of water vapour to boreal North America, but it has been largely overlooked in efforts to explain Northern Hemisphere glaciation. Here we present alkenone unsaturation ratios and diatom oxygen isotope ratios from a sediment core in the western subarctic Pacific Ocean, indicating that 2.7 million years ago late-summer sea surface temperatures in this ocean region rose in response to an increase in stratification. At the same time, winter sea surface temperatures cooled, winter floating ice became more abundant and global climate descended into glacial conditions. We suggest that the observed summer warming extended into the autumn, providing water vapour to northern North America, where it precipitated and accumulated as snow, and thus allowed the initiation of Northern Hemisphere glaciation.
    Type: Article , PeerReviewed
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  • 3
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    Fisheries: Decline of Pacific tuna populations exaggerated? - Ransom and Worm Reply (2005)
    Nature Publishing Group
    In:  Nature, 434 . E2.
    Details
    Publication Date: 2017-03-10
    Type: Article , PeerReviewed
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  • 4
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    Transient sexual mimicry leads to fertilization (2005)
    Nature Publishing Group
    In:  Nature, 433 (7023). p. 212.
    Details
    Publication Date: 2021-08-16
    Description: Sexual mimicry among animals is widespread, but does it impart a fertilization advantage in the widely accepted ‘sneak–guard’ model of sperm competition? Here we describe field results in which a dramatic facultative switch in sexual phenotype by sneaker-male cuttlefish leads to immediate fertilization success, even in the presence of the consort male. These results are surprising, given the high rate at which females reject copulation attempts by males, the strong mate-guarding behaviour of consort males, and the high level of sperm competition in this complex mating system
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  • 5
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    Post-spawning egg care by a squid (2005)
    Nature Publishing Group
    In:  Nature, 438 (7070). p. 929.
    Details
    Publication Date: 2021-08-20
    Type: Article , PeerReviewed
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  • 6
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    Upper Cretaceous African climate development and implications for the marine carbon cycle (2005)
    Nature Publishing Group
    In:  Nature, 437 . pp. 241-244.
    Details
    Publication Date: 2017-03-10
    Description: The tropics have been suggested as the drivers of global ocean and atmosphere circulation and biogeochemical cycling during the extreme warmth of the Cretaceous period1, 2; but the links between orbital forcing, freshwater runoff and the biogeochemistry of continental margins in extreme greenhouse conditions are not fully understood. Here we present Cretaceous records of geochemical tracers for freshwater runoff obtained from a sediment core off the Ivory Coast that indicate that alternating periods of arid and humid African climate were driven by orbital precession. Our simulations of the precession-driven patterns of river discharge with a global climate model suggest that ocean anoxia and black shale sedimentation were directly caused by high river discharge, and occurred specifically when the northern equinox coincided with perihelion (the minimum distance between the Sun and the Earth). We conclude that, in a warm climate, the oceans off tropical continental margins respond rapidly and sensitively to even modest changes in river discharge.
    Type: Article , PeerReviewed
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  • 7
    Electronic Resource
    Electronic Resource
    Learning to unwind (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 734-736 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] The minichromosome maintenance (MCM) proteins are essential for the initiation and progression of DNA replication in eukaryotes. All eukaryotes possess six different MCMs (MCM2–7) that can form a number of different heteromeric complexes. Helicase activity has only been detected in vitro in ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb0905-734
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  • 8
    Electronic Resource
    Electronic Resource
    Research Highlights (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 741-741 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Histones on LSD Covalent histone modification, such as phosphorylation, acetylation, methylation and ubiquination, marks the transcription state of genes. These markings are dynamic and reflect the constant reprogramming of gene expression in response to various cellular signals. Histone ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb0905-741
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  • 9
    Electronic Resource
    Electronic Resource
    Jens Nyborg 1942–2005 (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 730-730 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] On Tuesday 19 July 2005, Jens Nyborg, the father of macromolecular crystallography in Denmark and an associate professor in the Department of Molecular Biology at Aarhus University, passed away. He was 63 years of age.... Shaped by the smiling landscape of his native island of Funen in Denmark, ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb0905-730
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  • 10
    Electronic Resource
    Electronic Resource
    Witnessing the structure revolution (2005)
    [s.l.] : Nature Publishing Group
    Nature structural & molecular biology 12 (2005), S. 731-731 
    Details
    ISSN: 1545-9985
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] What was it like to experience the thrill of discovering the first DNA and protein structures? As you read his new book, Richard Dickerson makes you a virtual eyewitness to these discoveries, surely among the most important of the past century. His title, Present at the Flood, comes from John ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/nsmb0905-731
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