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  • 1
    Electronic Resource
    Electronic Resource
    Intertidal zonation of benthic macrofauna in a subtropical salt marsh and nearby unvegetated flat (SE, Brazil) (1997)
    Springer
    Hydrobiologia 353 (1997), S. 171-180 
    Details
    ISSN: 1573-5117
    Keywords: zonation ; macrofauna ; salt marsh ; tidal flat ; ParanaguáBay ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Intertidal zonation and seasonal variability of benthic macrofaunawere analysed along a Spartina alterniflora (Loisel) marshand nearby unvegetated flat in a subtropical bay. Fivereplicate samples were taken along six tidal levels from the uppermarsh, limited by mangroves, to the lower unvegetated flat.Sediment composition, live and dead above- and below-ground biomassof S. alterniflora and detritus biomass from the vegetatedand unvegetated areas were determined to evaluate whethervariations on plant structure and detritus along the 25 m transectaffect the dynamics of benthic invertebrates. Composition andabundance of invertebrates varied with the elevation and plantcover clearly plays a key role on the distribution patterns of themacrofauna. Below-ground and dead above-ground biomass presentedthe highest correlation with the densities of the invertebrates.Vertical distribution of benthic fauna, however, appears not to beaffected by bellow-ground fraction. Higher detritus biomass in theupper unvegetated flat coincided with higher densities ofdetritivorous or omnivorous species in this level. An eruptivealgal growth during summer affected positively most of the dominantspecies.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003090701675
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 2
    Electronic Resource
    Electronic Resource
    Retinal toxicity of intravitreal lazaroid (21-aminosteroid U75412E) (1992)
    Springer
    International ophthalmology 16 (1992), S. 153-157 
    Details
    ISSN: 1573-2630
    Keywords: 21-aminosteroids ; lazaroids ; lipid peroxidation ; retinal toxicity ; U75412E
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract The 21-aminosteroids or lazaroids are a novel series of compounds being developed for the acute treatment of traumatic or ischemic injury of the nervous system. These compounds were specifically designed to localize within cell membranes and inhibit lipid peroxidation reactions. In this study, 21-aminosteroid U75412E was injected into the vitreous body of rabbit eyes to evaluate its suitability for intraocular injection and its toxicity on intraocular tissues. Doses ranged from 20 Μg to 200 Μg. Retinal toxicity was determined through light and transmission electron microscopy and electroretinography. No retinal toxicity was noted in doses of 30 Μg and below.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00916434
    Library Location Call Number Volume/Issue/Year Availability
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    Paper (German National Licenses)
    Fulltext
  • 3
    Electronic Resource
    Electronic Resource
    The role of above- and below-ground components of Spartina alterniflora (Loisel) and detritus biomass in structuring macrobenthic associations of Paranaguá Bay (SE, Brazil) (1999)
    Springer
    Hydrobiologia 400 (1999), S. 167-177 
    Details
    ISSN: 1573-5117
    Keywords: macrofauna ; Spartina alterniflora ; salt marsh ; detritus biomass ; tidal flat ; Paranaguá Bay ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of Spartina alterniflora marshes and detritus availability on the spatial structure and time variability of macrobenthic associations was investigated in Paranaguá Bay, a subtropical estuary in southern Brazil. Four sampling sites were established along the salinity and exposure gradient of Paranaguá Bay in the winter and summer of 1992. At each site, 5 samples (0.02 m2corer) were taken in the salt marshes and adjacent unvegetated tidal flats. Sediment composition, salt marsh structure (stem height and density, live and dead above- and below-ground biomass of S. alterniflora) and vegetal detritus biomass were determined to assess whether they can affect the dynamics of macrobenthic invertebrates. The development of salt marshes and the amount of detritus, the latter mainly originated from adjacent mangroves, were determined by the energy and salinity gradients along the bay. Plant above- and below-ground components, together with detritus biomass, exert a strong influence on the composition and distribution of macrofauna in Paranaguá Bay. Salt marshes support higher densities and species number of macrobenthic invertebrates. Multivariate analyses showed that oscillations of different fractions of Spartina alterniflora, as well as detritus availability, affect the different components of macrobenthic associations in a variable degree. Spatial and temporal shifts of infaunal organisms appear to be more evident than those of mobile epibenthic forms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003753001411
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
  • 4
    Electronic Resource
    Electronic Resource
    The role of above- and below-ground components of Spartina alterniflora (Loisel) and detritus biomass in structuring macrobenthic associations of Paranaguá Bay (SE, Brazil) (1999)
    Springer
    Hydrobiologia 400 (1999), S. 167-177 
    Details
    ISSN: 1573-5117
    Keywords: macrofauna ; Spartina alterniflora ; salt marsh ; detritus biomass ; tidal flat ; Paranaguá Bay ; Brazil
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract The influence of Spartina alterniflora marshes and detritus availability on the spatial structure and time variability of macrobenthic associations was investigated in Paranaguá Bay, a subtropical estuary in southern Brazil. Four sampling sites were established along the salinity and exposure gradient of Paranaguá Bay in the winter and summer of 1992. At each site, 5 samples (0.02 m2corer) were taken in the salt marshes and adjacent unvegetated tidal flats. Sediment composition, salt marsh structure (stem height and density, live and dead above- and below-ground biomass of S. alterniflora) and vegetal detritus biomass were determined to assess whether they can affect the dynamics of macrobenthic invertebrates. The development of salt marshes and the amount of detritus, the latter mainly originated from adjacent mangroves, were determined by the energy and salinity gradients along the bay. Plant above- and below-ground components, together with detritus biomass, exert a strong influence on the composition and distribution of macrofauna in Paranaguá Bay. Salt marshes support higher densities and species number of macrobenthic invertebrates. Multivariate analyses showed that oscillations of different fractions of Spartina alterniflora, as well as detritus availability, affect the different components of macrobenthic associations in a variable degree. Spatial and temporal shifts of infaunal organisms appear to be more evident than those of mobile epibenthic forms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1023/A:1003753001411
    Library Location Call Number Volume/Issue/Year Availability
    BibTip Others were also interested in ...
    Paper (German National Licenses)
    Fulltext
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