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  • 1
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    Chemistry of ODP Hole 121-752B samples (Table 2) (1991)
    PANGAEA
    In:  Supplement to: Schuraytz, B C; O'Connell, S O; Sharpton, V L (1991): Data report: iridium and trace element measurements from the Cretaceous-Tertiary boundary, Site 752, Broken Ridge, Indian Ocean. In: Weissel, J; Peirce, J; Taylor, E; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 121, 913-919, https://doi.org/10.2973/odp.proc.sr.121.175.1991
    Details
    Publication Date: 2024-01-09
    Description: Fourteen samples spanning a 2.5 m interval that includes the Cretaceous-Tertiary (K/T) boundary from Hole 752B near the crest of Broken Ridge in the eastern Indian Ocean, were studied in order to search for anomalous enrichments of iridium (Ir) and shock-metamorphosed quartz grains. No allogenic quartz grains 〉10 µm were observed, hence the presence of quartz containing diagnostic evidence of shock-metamorphism could not be confirmed. Two Ir anomalies of 2.2±0.6 and 2.0±0.4 parts per billion (ppb) were measured in samples of dark green ash-bearing chalk at depths of 357.93 and 358.80 mbelow seafloor (mbsf), respectively, (Samples 121-752B-11R-3, 13-14 cm, and 121-752B-11R-3, 100-101 cm) using conventional Instrumental Neutron Activation Analysis (INAA). These samples containing anomalous enrichments of Ir were taken from approximately 82 cm above and 5 cm below the extinction level of Globotruncanids. Our results are consistent with those of Michel et al. (this volume), who observe elevated concentrations of Ir at these depths in addition to a larger Ir anomaly associated with the extinction level of Globotruncanids.
    Keywords: 121-752B; Antimony; Antimony, standard deviation; Arsenic; Arsenic, standard deviation; Barium; Barium, standard deviation; Caesium; Caesium, standard deviation; Calcium oxide; Calcium oxide, standard deviation; Cerium; Cerium, standard deviation; Chromium; Chromium, standard deviation; Cobalt; Cobalt, standard deviation; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Europium; Europium, standard deviation; Gold; Gold, standard deviation; Hafnium; Hafnium, standard deviation; Identification; Iridium; Iridium, standard deviation; Iron oxide, FeO; Iron oxide, FeO, standard deviation; Joides Resolution; Lanthanum; Lanthanum, standard deviation; Leg121; Lutetium; Lutetium, standard deviation; Neodymium; Neodymium, standard deviation; Nickel; Nickel, standard deviation; Ocean Drilling Program; ODP; Potassium oxide; Potassium oxide, standard deviation; Rubidium; Rubidium, standard deviation; Samarium; Samarium, standard deviation; Sample code/label; Sample mass; Scandium; Scandium, standard deviation; Selenium; Selenium, standard deviation; Sodium oxide; Sodium oxide, standard deviation; South Indian Ridge, South Indian Ocean; Strontium; Strontium, standard deviation; Tantalum; Tantalum, standard deviation; Terbium; Terbium, standard deviation; Thorium; Thorium, standard deviation; Uranium; Uranium, standard deviation; Ytterbium; Ytterbium, standard deviation; Zirconium; Zirconium, standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 938 data points
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    DATA PANGAEA
  • 2
    Electronic Resource
    Electronic Resource
    Effects of a predator and prey on a foraging reef fish: implications for understanding density-dependent growth (2002)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of fish biology 60 (2002), S. 0 
    Details
    ISSN: 1095-8649
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A temperate reef-fish, magpie morwong Cheilodactylus nigripes, was more abundant in habitats (turfing algae) that supported larger numbers of prey at four different locations across 〉1000 km of continuous coastline. Cheilodactylus nigripes fed at greater rates in patches of turfing algae known to contain greater abundance of prey (primarily gammarid amphipods). In the presence of the piscivorous New Zealand fur seal Arctocephalus forsteri, however, these fish fed at a substantially reduced rate. These results have severe implications for understanding density-dependent growth. If predators are attracted to larger numbers of prey (this study) and prey suffer slower rates of growth under heavier predation risk (previous studies), then experiments that manipulate densities of prey to test the effects of competition may confound the effects of predators and competitors on growth. Separation of the density-dependent effects of foraging (predation) and rivalry over the acquisition of limited resources (competition) is needed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1095-8649.2002.tb02447.x
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  • 3
    Electronic Resource
    Electronic Resource
    Experimental effects of kelp canopies on subtidal coralline algae (2001)
    Melbourne, Australia : Blackwell Science Pty
    Austral ecology 26 (2001), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Plants are often grouped as canopy species or understorey species because it is thought that that these sets of taxa interact in predictable ways. Mensurative experiments in southern Australia demonstrated that the percentage cover of encrusting coralline algae was greater, and articulated (branching) coralline algae less, on boulders under a canopy of dense kelp (〉7 plants per m2), Ecklonia radiata, than on boulders without kelp. Experimental clearances of kelp and reciprocal transplants of boulders between patches of E. radiata and patches without kelp showed that canopies maintained and facilitated the growth of encrusting coralline algae and reduced the cover of articulated coralline algae. Potential artefacts associated with clearing kelp and transplanting boulders were not detected when tested with a series of translocation controls. These results reject the model that the co-occurrence of E. radiata and encrusting corallines is just an assemblage of plants caused by spatial and temporal coincidence. Instead, they support the model that kelp facilitates the growth and survival of understorey algae.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1442-9993.2001.01089.pp.x
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  • 4
    Electronic Resource
    Electronic Resource
    Variations in the configuration of algae in subtidal forests: Implications for invertebrate assemblages (2004)
    Oxford, UK : Blackwell Science Pty
    Austral ecology 29 (2004), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: Abstract  The ecology of Australia's most extensive canopy-forming alga, Ecklonia radiata, is often studied with little regard as to whether it occurs in monospecific stands or as part of a mixed assemblage of canopy-forming algae. We tested the hypothesis that E. radiata does not primarily occur as monospecific stands, rather it occurs more often in stands of mixed algae. At a 1-m2 scale we recognized three main configurations within forests of algae (hereafter called stands): E. radiata that occurs as (i) monospecific stands; (ii) clumps (four or more individuals together) surrounded by species of Fucales; or (iii) individual plants (or clusters of fewer than three plants) interspersed among species of Fucales. All three types of stand occurred in similar proportions (percentage cover) across two regions of Australia's southern coastline (Western and South Australia). We also tested the hypothesis that these three types of stands (identified at 1 m2) contain different assemblages of invertebrates associated with the holdfast of E. radiata. Assemblages of invertebrates varied between monospecific and interspersed stands, but not between monospecific and clumped stands. These results suggest that variation in the configuration of subtidal algae (stands measured at a 1-m2 scale) has the potential to influence the composition and abundance of associated biota. We suggest that although studies in stands of monospecific E. radiata may provide useful information for the majority of forests containing E. radiata (monospecific and clumped stands made up 65% of forests sampled), caution must be used when extrapolating to stands of mixed, interspersed algae (〉31% of forests sampled).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1442-9993.2004.01372.x
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  • 5
    Electronic Resource
    Electronic Resource
    Interactive effects of shade and surface orientation on the recruitment of spirorbid polychaetes (2001)
    Melbourne, Australia : Blackwell Science Pty
    Austral ecology 26 (2001), S. 0 
    Details
    ISSN: 1442-9993
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Biology
    Notes: A series of observations and an experiment were carried out to test hypotheses about the effects of shade on the densities of spirorbid polychaetes (Neodexiospira spp.) on intertidal pneumatophores (mangrove roots) of Avicennia marina. Densities of spirorbids were greater on pneumatophores surrounded by seagrass (Zostera mucronata) than patches without seagrass. Within patches of seagrass, the density and survivorship of spirorbids on pneumatophores was greater near the substratum (covered by seagrass) than high above the substratum (not covered by seagrass). The model that these patterns of abundance are explained by greater recruitment of spirorbids to shaded surfaces was assessed. This was done by experimentally testing the hypothesis that recruitment to patches without seagrass would not differ between the upper (unshaded) and lower surfaces (unshaded) of clear plastic sheets, but would be greater on the lower surfaces (shaded) than upper surfaces (unshaded) of black plastic sheets. Recruitment was consistent with these predictions and therefore provided evidence that differences in densities of spirorbids between substrata with and without seagrass may be due largely to differences in shading.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1442-9993.2001.01090.pp.x
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  • 6
    Electronic Resource
    Electronic Resource
    Internal magnetic fields in YBa"2Cu"3O"7"-"δ from Muon spin rotation experiments: Discussion in terms of a glasslike superconducting state
    Amsterdam : Elsevier
    Physica C: Superconductivity and its applications 153-155 (1988), S. 71-74 
    Details
    ISSN: 0921-4534
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0921-4534(88)90496-0
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  • 7
    Electronic Resource
    Electronic Resource
    The electric field gradient at ^1^9F in diamond
    Amsterdam : Elsevier
    Solid State Communications 68 (1988), S. 587-589 
    Details
    ISSN: 0038-1098
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0038-1098(88)90208-6
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  • 8
    Electronic Resource
    Electronic Resource
    The lattice site of ^1^0F implanted into diamond by TDPAD
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 35 (1988), S. 423-430 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(88)90305-9
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  • 9
    Electronic Resource
    Electronic Resource
    The Stuttgart positron beam, its performance and recent experiments
    Amsterdam : Elsevier
    Nuclear Inst. and Methods in Physics Research, B 50 (1990), S. 300-306 
    Details
    ISSN: 0168-583X
    Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002
    Topics: Physics
    Type of Medium: Electronic Resource
    URL: http://linkinghub.elsevier.com/retrieve/pii/0168-583X(90)90372-2
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  • 10
    Electronic Resource
    Electronic Resource
    Limits for two-photon ande + e − decay widths of positron-electron scattering resonances for√s=1.78 to 1.92 MeV (1991)
    Springer
    The European physical journal 340 (1991), S. 209-218 
    Details
    ISSN: 1434-601X
    Keywords: 14.80.Pb ; 13.10. + q ; 12.20.Fv
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Motivated by the observation of energy- and momentum-correlatede + e − pairs in heavy ion collisions, a search for resonances ine + e − scattering at the corresponding energies has been made. Thee + e − decay channel is analyzed in a time window from ∼ 10−13 s to ∼ 10−11 s with a set-up optimized for low-background detection of delayede + e − decays. The two-photon decay channel of a hypothetical resonance is investigated by measuring the two-photon annihilation-in-flight excitation function. New upper limits for the partiale + e − decay width Γee of a few meV are derived for total centre-of-mass energies √s between 1.78 and 1.92 MeV, taking into account the dilepton as well as the two-photon decay of a neutral resonance.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01303834
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