Search Results - (Author, Cooperation:T. M. Bezemer)

Showing 1 - 3 results of 3, query time: 0.11s Refine Results
  1. 1
    Staff View
    Publication Date:
    2015-10-16
    Publisher:
    Nature Publishing Group (NPG)
    Print ISSN:
    0028-0836
    Electronic ISSN:
    1476-4687
    Topics:
    Biology
    Chemistry and Pharmacology
    Medicine
    Natural Sciences in General
    Physics
    Keywords:
    *Biodiversity ; *Climate ; Climate Change/statistics & numerical data ; Conservation of Natural Resources ; Disasters/statistics & numerical data ; Droughts ; *Ecosystem ; Grassland ; Human Activities ; *Plant Physiological Phenomena
    Published by:
    Latest Papers from Table of Contents or Articles in Press
  2. 2
    Bruce, K. D. ; Jones, T. H. ; Bezemer, T. M. ; Thompson, L. J. ; Ritchie, D. A.

    Oxford, UK : Blackwell Science Ltd
    Published 2000
    Staff View
    ISSN:
    1365-2486
    Source:
    Blackwell Publishing Journal Backfiles 1879-2005
    Topics:
    Biology
    Energy, Environment Protection, Nuclear Power Engineering
    Geography
    Notes:
    The effect of elevated carbon dioxide levels on total bacterial communities was studied in a series of controlled and replicated model terrestrial ecosystems over a period of 38 weeks. The bacterial community was profiled using Denaturing Gradient Gel Electrophoresis (DGGE) analysis of bacterial 16S rRNA gene fragments amplified by the Polymerase Chain Reaction from DNA extracted directly from soil. Bacterial community DGGE profiles provided three major findings: (i) there was a high degree of profile similarity after ≈ 12 weeks (one plant generation); (ii) whilst overall DGGE profile was maintained over the 38 weeks (three plant generations), the banding patterns became more diverse with time; (iii) DGGE data provided no evidence for a shift in bacterial community structure resulting from exposure of the ecosystem to an increased atmospheric CO2 level.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses
  3. 3
    Staff View
    ISSN:
    1570-7458
    Keywords:
    cowpea ; Vigna unguiculata ; West Africa ; biological control ; foraging behaviour ; arrestment
    Source:
    Springer Online Journal Archives 1860-2000
    Topics:
    Biology
    Notes:
    Abstract The functional response of the egg parasitoid Uscana lariophaga Steffan (Hymenoptera: Trichogrammatidae) was tested under three different host distributions (even, clumped and random) within clusters of Callosobruchus maculatus Fab. (Coleoptera: Bruchidae) eggs. A Holling Type II functional response was found for all three distributions. Over low host densities, less than 50% of the host clusters was parasitized. At low host densities, U. lariophaga females parasitized significantly fewer eggs in random egg clusters with many beans than in clusters with fewer beans and an even or clumped egg distribution. At higher egg densities, plateau levels of maximum number of hosts parasitized were the same for all three egg distributions. Uscana lariophaga appears to be adapted to search for even or clustered egg distributions, as can be found in the field and under storage conditions.
    Type of Medium:
    Electronic Resource
    URL:
    Articles: DFG German National Licenses