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  • 1
    Electronic Resource
    Electronic Resource
    Imposex in Nucella lapillus and intersex in Littorina littorea: interspecific comparison of two TBT-induced effects and their geographical uniformity (1998)
    Springer
    Hydrobiologia 378 (1998), S. 199-213 
    Details
    ISSN: 1573-5117
    Keywords: Nucella lapillus ; Littorina littorea ; imposex ; intersex ; TBT effect monitoring ; geographical differences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Two different tributyltin (TBT)-induced virilisation phenomena in prosobranch snails – intersex in Littorina littorea and imposex in Nucella lapillus – are compared in order to facilitate their simultaneous use in geographical large scale effect monitoring surveys. Imposex in dogwhelks is a more sensitive biomarker and should be used in areas that are only slightly or moderately contaminated with TBT (ambient TBT concentrations 〈 2.0 ng as Sn l-1). The assessment of intersex intensities in periwinkle populations has considerable advantages in areas with higher TBT concentrations and should be used also wherever dogwhelks are absent irrespective of the TBT exposure level. The intersex index (ISI) and vas deferens sequence (VDS) index are proposed as the most suited parameters for effect monitoring purposes. The geographical uniformity of intersex and imposex is analysed and proven for the coasts of Ireland, France, and Germany. A relative loss of TBT sensitivity in females can be found, but to a varying extent in both species. The implications of this result for biological TBT effect monitoring programmes are discussed in light of the fact that intersex and imposex have both been found to be irreversible. Because it is the objective of these programmes to assess current TBT contaminations and resulting biological effects, only relatively young specimens should be considered in the sampling strategy.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003218411850
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  • 2
    Electronic Resource
    Electronic Resource
    Presence and significance of naturally occurring chemical elements of the periodic system in the plant organism and consequences for future investigations on inorganic environmental chemistry in ecosystems (1992)
    Springer
    Plant ecology 103 (1992), S. 1-30 
    Details
    ISSN: 1573-5052
    Keywords: Element Concentration Cadasters ; IUBS project ; Multielement analysis ; Element toxicity ; Occurrence ; Essentiality ; Accumulation ; Consumption
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract After acceptance of the “Element Concentration Cadasters in Ecosystems” (ECCE) programme as an international project sponsored by the International Union of Biological Sciences (IUBS) at the 24th General Assembly of IUBS in Amsterdam in Sept 1991, the present status of “Biological Trace Element Research” (BTER) is presented here from the biological point of view. Especially information on occurrence, essentially, toxicity and uptake form of all 88 naturally occurring chemical elements is presented. In addition an estimated annual production of each element in the year 2000 and examples of their technical application is given. A scientific proposal for further research work on a local, regional and global scale has been discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00033413
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