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  • 1
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    Hydrogeology and simulated effects of ground-water development of the Floridan aquifer system, southwest Georgia, northwest Florida, and southernmost Alabama (1988)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0002(1403-H)
    In: Professional paper
    Pages: VIII, H-71 + 24 pl.
    Series Statement: U.S. Geological Survey professional paper 1403-H
    Language: English
    Branch Library: GFZ Library
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  • 2
    Series available for loan
    Series available for loan
    Methods and computer program documentation for determining anisotropic transmissivity tensor components of two-dimensional ground-water flow (1987)
    Washington, DC : United States Gov. Print. Off.
    Associated volumes
    Details Availability
    Call number: SR 90.0004(2308)
    In: United States Geological Survey water-supply paper
    Type of Medium: Series available for loan
    Pages: IV, 46 S.
    Series Statement: U.S. Geological Survey water-supply paper 2308
    Language: English
    Location: Lower compact magazine
    Branch Library: GFZ Library
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  • 3
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    Palynology and Vegetation History (2021)
    Frontiers Media SA
    Details
    Publication Date: 2024-04-05
    Description: This Research Topic commemorates the centenary of the first quantitative pollen diagram by Lennart von Post, the founder of paleoecological palynology. The main aim is to provide a thorough view of the use of palynology in aspects such as the reconstruction of Quaternary vegetation and environmental changes, the role of natural and anthropogenic drivers in the development of the Quaternary vegetation, the shaping of present-day ecological and biogeographical patterns, the potential application of this knowledge in biodiversity conservation and landscape restoration and the development of new methods of pollen analysis and data management. The Research Topic is subdivided into four main conceptual parts, namely (1) modern analog studies; (2) land cover estimates from pollen data; (3) vegetation dynamics reconstructions from Europe, North and South America, Africa and Oceania; and (4) large-scale reviews and meta-analyses. Hopefully, this Research Topic will serve to appraise the state of the art of modern palynology and highlight the usefulness of this discipline in long-term ecological research.
    Keywords: QH540-549.5 ; Q1-390 ; palynology ; Paleoclimates ; conservation ; Climate Change ; Quaternary ; biogeography ; vegetation history ; human disturbance ; paleoenvironments ; Paleoecology ; thema EDItEUR::P Mathematics and Science::PS Biology, life sciences::PSA Life sciences: general issues::PSAF Ecological science, the Biosphere
    Language: English
    Format: image/jpeg
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    E-BOOK
  • 4
    Electronic Resource
    Electronic Resource
    Genetic similarity and quality interact in mate choice decisions by female mice (2003)
    [s.l.] : Nature Publishing Group
    Nature genetics 35 (2003), S. 103-106 
    Details
    ISSN: 1546-1718
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Medicine
    Notes: [Auszug] Females express mate preferences for genetically dissimilar males, especially with respect to the major histocompatibility complex, MHC, and for males whose sexually selected signals indicate high genetic quality. The balance of selection pressure on each trait will depend on how females weight ...
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1038/ng1231
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  • 5
    Electronic Resource
    Electronic Resource
    Scent-rubbing and status signalling by male mammals (1990)
    Springer
    Chemoecology 1 (1990), S. 92-95 
    Details
    ISSN: 1423-0445
    Keywords: scent-rubbing ; scent-marking ; scent-matching ; resource holders ; territories ; Mammalia
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Summary There is no consensus about the function of scent-rubbing, a widespread behaviour in which mammals rub their bodies vigorously in substances, many strong-smelling and some artificial, such as rotting meat, intestinal contents and engine oil. Here we suggest that scent-rubbing is involved in status advertisement and that, as in assessment using scent marks, the mechanism used by competitors to assess potential opponents may be scent-matching. In scent-matching a resource holder is assessed (identified) by comparing its odour with odours on or near the defended resource. In scent marking the odour originates from the resource holder (glandular secretion, urine and faeces); in scent-rubbing the odour originates in the environment. A prerequisite of unambiguous scent-matching is that the odour of scent-marks should be uniquely characteristic of one individual. This may be why marking substances are very complex chemically. Scent-rubbing often occurs with scent-marking and, rather than acting independently of scent-marking, the odours acquired may either (i) add to the complexity of the signal, thus reducing signal ambiguity, or (ii) increase the range of the signal by adding a strong smelling component. Subordinates could potentially cheat by rubbing in the same odours as the resource holder. Resource holders could prevent cheating (i) by checking other status cues and by testing competitors whose scent matches, then escalating contests when the competitor's fighting ability (more formally, Resource Holding Power) proves to be lower than that of a resource holder and (ii) by mixing the substances used for scent-rubbing with the unique substances used in scent-marking.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01241649
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  • 6
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    A study of CR-39 plastic charged-particle detector replacement by consumer imaging sensors (2016)
    American Institute of Physics (AIP)
    Details
    Publication Date: 2016-08-04
    Description: Consumer imaging sensors (CIS) are examined for real-time charged-particle detection and CR-39 plastic detector replacement. Removing cover glass from CIS is hard if not impossible, in particular for the latest inexpensive webcam models. We show that $10-class CIS are sensitive to MeV and higher energy protons and α -particles by using a 90 Sr β -source with its cover glass in place. Indirect, real-time, high-resolution detection is also feasible when combining CIS with a ZnS:Ag phosphor screen and optics. Noise reduction in CIS is nevertheless important for the indirect approach.
    Print ISSN: 0034-6748
    Electronic ISSN: 1089-7623
    Topics: Electrical Engineering, Measurement and Control Technology , Physics
    Published by American Institute of Physics (AIP)
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  • 7
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    Monte Carlo simulation of ELT-scale multi-object adaptive optics deformable mirror requirements and tolerances (2013)
    Oxford University Press
    Details
    Publication Date: 2013-09-26
    Description: Multi-object adaptive optics (MOAO) has been demonstrated by the CANARY instrument on the William Herschel Telescope. However, for proposed MOAO systems on the next-generation extremely large telescopes (ELTs), such as ELT Adaptive optics for GaLaxy Evolution (EAGLE), many challenges remain. Here we investigate requirements that MOAO operation places on deformable mirrors (DMs) using a full end-to-end Monte Carlo adaptive optics (AO) simulation code. By taking into consideration a prior global ground-layer (GL) correction, we show that actuator density for the MOAO DMs can be reduced with little performance loss. We note that this reduction is only possible with the addition of a GL DM, whose order is greater than or equal to that of the original MOAO mirrors. The addition of a GL DM of lesser order does not affect system performance (if tip/tilt star sharpening is ignored). We also quantify the maximum mechanical DM stroke requirements (3.5 μm desired) and provide tolerances for the DM alignment accuracy, both lateral (to within an eighth of a sub-aperture) and rotational (to within 0 $_{.}^{\circ}$ 2). By presenting results over a range of laser guide star asterism diameters, we ensure that these results are equally applicable for laser tomographic AO systems. We provide the opportunity for significant cost savings to be made in the implementation of MOAO systems, resulting from the lower requirement for DM actuator density.
    Print ISSN: 0035-8711
    Electronic ISSN: 1365-2966
    Topics: Physics
    Published by Oxford University Press
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  • 8
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    A trade-off between natural and sexual selection underlies diversification of a sexual signal (2015)
    Oxford University Press
    Details
    Publication Date: 2015-03-27
    Description: A longstanding hypothesis in evolutionary biology is that trade-offs between natural and sexual selection often underlie the diversification of sexual signals in the wild. A classic example of this "selection trade-off hypothesis" proposes that males evolve elaborate and conspicuous ornamentation in low-risk environments where female preferences dominate selection on sexual traits, but they evolve muted and relatively cryptic sexual traits in high-risk environments where selection from predators acts against conspicuous sexual traits and female preferences potentially weaken or reverse. However, little direct empirical evidence supports this notion. Using the model system of Bahamas mosquitofish ( Gambusia hubbsi )—where males have recently evolved greater orange coloration in their dorsal fins in blue holes lacking predatory fish relative to populations with fish predators—we tested this hypothesis using fish replicas differing only in dorsal-fin color. Specifically, we employed plastic fish models in a combination of field and lab experiments to directly examine conspicuity to predators and female preferences for dorsal-fin color. We found that orange-shifted dorsal fins resembling the color exhibited in predator-free populations appeared more conspicuous to predatory bigmouth sleepers ( Gobiomorus dormitor ) that are evolutionarily naive to mosquitofish. Wild-caught female mosquitofish preferred the orange-shifted dorsal-fin model during dichotomous choice tests; evolutionary history with predators did not affect female preferences. Similar mate-choice trials with lab-born virgin females also found preferences for the orange-shifted dorsal-fin model and revealed significant genetic variation for female preferences. Our study provides direct empirical evidence documenting a trade-off between natural and sexual selection in a colorful sexual signal.
    Print ISSN: 1045-2249
    Electronic ISSN: 1465-7279
    Topics: Biology
    Published by Oxford University Press
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  • 9
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    Chemically programmed self-sorting of gelator networks (2013)
    Springer Nature
    Details
    Publication Date: 2013-02-13
    Description: Chemically programmed self-sorting of gelator networks Nature Communications 4, 1480 (2013). doi:10.1038/ncomms2499 Authors: Kyle L. Morris, Lin Chen, Jaclyn Raeburn, Owen R. Sellick, Pepa Cotanda, Alison Paul, Peter C. Griffiths, Stephen M. King, Rachel K. O’Reilly, Louise C. Serpell & Dave J. Adams
    Electronic ISSN: 2041-1723
    Topics: Biology , Chemistry and Pharmacology , Natural Sciences in General , Physics
    Published by Springer Nature
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  • 10
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    Shallow breathing: bacterial life at low O2 (2013)
    Springer Nature
    Details
    Publication Date: 2013-02-16
    Description: Nature Reviews Microbiology 11, 205 (2013). doi:10.1038/nrmicro2970 Authors: Rachel L. Morris & Thomas M. Schmidt Competition for molecular oxygen (O2) among respiratory microorganisms is intense because O2 is a potent electron acceptor. This competition leads to the formation of microoxic environments wherever microorganisms congregate in aquatic, terrestrial and host-associated communities. Bacteria can harvest O2
    Print ISSN: 1740-1526
    Electronic ISSN: 1740-1534
    Topics: Biology , Medicine
    Published by Springer Nature
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