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  • 1980-1984  (4)
Source
Material
Years
Year
  • 1
    Electronic Resource
    Electronic Resource
    Meiofauna and the thiobios in the east flower garden brine seep (1983)
    Springer
    Marine biology 73 (1983), S. 269-283 
    Details
    ISSN: 1432-1793
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology
    Notes: Abstract Special hydrodynamic-chemical conditions at the East Flower Garden brine seep have provided the opportunity to examine the community structure of the thiobios and the oxybiotic-thiobiotic boundary. The boundary between the thiobios, whose population maxima occur in sulfidedependent chemoclines and which presumably have an ecologic requirement for sulfide, and the oxybios, which occur in oxidized zones above the chemocline, is controlled by sulfide, not oxygen. The boundary, which may not be at zero sulfide, is determined by a time-concentration phenomenon based on a dynamic interplay of sulfide and oxygen supply rates and the biota's sulfide detoxification capabilities. In Gollum's Canyon, where oxygen is plentiful, the boundary is at 10–40 μg-atoms·l-1 sulfide. Total abundances of organisms at thiobiotic stations were comparable to total abundances at oxybiotic stations. Highest thiobiotic abundance was 202 051 organisms per m2; highest oxybiotic abundance was 240 572 organisms per m2. The thiobios is dominated by representatives of the lower Bilateria (viz. Gnathostomulida, Platyhelminthes and Aschelminthes). These groups accounted for 50–80% of all the organisms present in the thiobiotic stations but less than 20% of all organisms in the oxybiotic stations. At two thiobiotic stations, over 50% of all organisms were gnathostomulids. Thiobios included macrofaunal as well as meiofaunal components. Peak abundances of amphipods were associated with the thiobiotic environment.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00392253
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Recovery by the coralAcropora cervicornis after drilling mud exposure. The free amino acid pool (1984)
    Springer
    Archives of environmental contamination and toxicology 13 (1984), S. 243-258 
    Details
    ISSN: 1432-0703
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Notes: Abstract Corals were exposed to drilling mud for 24 hr and then allowed to recover for 48 hr in clean seawater. Depending on the concentration and the mud used, exposure produced either an increase or decrease in free amino acid (FAA) pool size. Aspartate was affected to a greater degree than other amino acids. No clear instance of recovery could be ascertained after 48 hr in clean seawater. In several cases, corals, apparently unaffected by a 24 hr exposure, nevertheless suffered significant changes in the FAA pool during the 48 hr recovery period. Thus, the degree of toxicity of the drilling mud could not be accurately predicted from the 24 hr exposure data. In many cases, the choice of a normalizing parameter determined whether two sets of data were significantly different or not. Accurate effects assessment depends on a comparison of several methods of normalization to confirm statistical results.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01055883
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    The importance of monitoring metabolic recovery in the coral Acropora cervicornis after short-term exposure to drilling muds: Calcification rate and protein concentration (1984)
    Springer
    Coral reefs 2 (1984), S. 215-225 
    Details
    ISSN: 1432-0975
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Geosciences
    Notes: Abstract The effect of used drilling muds on coral health was examined by monitoring changes in calcification rate and soluble tissue protein concentration in the coral Acropora cervicornis. Exposure to 25 ppm (v/v) of one mud for 24 h reduced calcification rate in the growing tips by as much as 62%. In recovery experiments, corals were exposed to drilling muds for 24 h; some of them were allowed to recover in clean seawater for 48 h. After the 24-hour exposure, calcification rates were significantly less than those of the controls. After a 48-hour recovery period, calcification rates returned to control levels for one mud but were still significantly below control levels for another. The results indicate that the capacity for recovery after exposure cannot be predicted from the results of experiments on exposure only. Recovery capacity must be independently verified for all studies on the effects of short-term exposure to drilling muds.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00263575
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    Paper (German National Licenses)
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  • 4
    Electronic Resource
    Electronic Resource
    Effect of eight outer continental shelf drilling muds on the calcification rate and free amino acid pool of the coralAcropora cervicornis (1984)
    Springer
    Bulletin of environmental contamination and toxicology 33 (1984), S. 362-372 
    Details
    ISSN: 1432-0800
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering , Medicine
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01625556
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    Paper (German National Licenses)
    Fulltext
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