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  1. Authors: O. Kinne, H. -P. Bulnheim, B. Werner, H. von Westernhagen, H. Rosenthal, F. -W. Tesch, K. Anger and H. Kesseler
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609988
    Content type: Addendum Published on:

  3. Shadow responses, including reactions to both increase (“on“) and decrease (“off“) in light intensity have been hitherto described in the adults of various bottom-dwelling marine invertebrates. These reactions...

    Authors: H. -H. Sommer
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609986
    Content type: OriginalPaper Published on:

  4. Enchytraeus albidus is able to absorb dissolved14C-labeled neutral amino acids (glycine, L-alanine, L-valine,α-aminoisobutyric acid) and an amino-acid mixture from ambient water across the body surface against c...

    Authors: D. Siebers and H. -P. Bulnheim
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609985
    Content type: OriginalPaper Published on:

  5. 14C-glycine absorption by eggs of the herringClupea harengus from a 2 µM solution at 15°C depends on the stage of embryonic development. Unidirectional14C-glycine influx rates are small at early stages: 0.6 ± 0....

    Authors: D. Siebers and H. Rosenthal
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609984
    Content type: OriginalPaper Published on:

  6. In-situ investigations on the life of the common sea star (Asterias rubens L.) were carried out in 1976, employing the Underwater Laboratory “Helgoland“ in Lübeck Bay (Western Baltic Sea). The abundance ofA. rube...

    Authors: K. Anger, U. Rogal, G. Schriever and C. Valentin
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609982
    Content type: OriginalPaper Published on:

  7. In spring 1968, the centre of the upwelling region off NW Africa was investigated using R. V. “Meteor“. The hydrographic structure in this area is characterized by irregular upwelling in space and time. The co...

    Authors: M. Gillbricht
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 29:BF01609981
    Content type: OriginalPaper Published on:

  9. This report on an informal session held during the International Helgoland Symposium 1976, emphasizes basic perspectives of marine-ecosystem research and man's dependence on the sea. Particular reference is ma...

    Authors: J. W. Hedgpeth
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207873
    Content type: Informal Sessions Published on:

  10. This paper is a brief report on an informal session held during the International Helgoland Symposium 1976. On the basis of a tape recording and notes, it has been prepared by the author who acted as convener ...

    Authors: J. McN Sieburth
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207872
    Content type: Informal Sessions Published on:

  11. The effect of zinc sulphate has been investigated in mono- and multispecies cultures of the dinoflagellatesScrippsiella faeroense, Prorocentrum micans andGymnodinium splendens and of the diatomsSchroederella schr...

    Authors: H. Kayser
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207871
    Content type: Pollution Effects on Ecosystems Published on:

  12. “Marine Ecosystem Testing Units” (METU) is an experimental design for integrating responses of communities of marine organisms to low level pollutants under natural conditions of temperature, weather, season, ...

    Authors: W. P. Davis, B. S. Hester, R. L. Yoakum and R. G. Domey
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207870
    Content type: Pollution Effects on Ecosystems Published on:

  13. Overall comparisons of marine pelagic productions in different systems are speculative to a high degree. Yet they often bring to our attention processes which have not been sufficiently investigated. One such ...

    Authors: W. Greve and T. R. Parsons
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207869
    Content type: Pollution Effects on Ecosystems Published on:

  14. A major problem associated with the discharge of pulp or paper-mill effluent into shallow estuarine ecosystems, such as the upper L'Etang in Canada or the Don in Scotland, is the development of anoxic conditio...

    Authors: N. J. Poole, R. J. Parkes and D. J. Wildish
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207866
    Content type: Pollution Effects on Ecosystems Published on:

  16. The processes taking place at the partioning boundaries of a marine ecosystem are still rather obscure. At a permanent research station, water (in winter, ice) samples were taken throughout the year from 6 dif...

    Authors: M. V. Propp
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207864
    Content type: Pelagic Ecosystems Published on:

  17. Taxonomic composition and variations in density and biomass of the plankton community in the Öregrundsgrepen, a shallow coastal area, were investigated from June 1972 to November 1973. The phytoplankton biomas...

    Authors: S. Eriksson, C. Sellei and K. Wallström
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207863
    Content type: Pelagic Ecosystems Published on:

  18. A continuous, steady-state theory has been developed for the abundance of organisms in the pelagic ecosystem as a function of their body weight. It is based on accepted relationships for the weight-dependence ...

    Authors: T. Platt and K. Denman
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207862
    Content type: Pelagic Ecosystems Published on:

  19. A scheme has been developed for observing diurnal changes in dissolved organic matter in the photic zone and correlating the with specific microbial fractions and their rates of growth and uptake. Particulate ...

    Authors: J. McN Sieburth, K. M. Johnson, C. M. Burney and D. M. Lavoie
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207861
    Content type: Pelagic Ecosystems Published on:

  20. Employing in situ SCUBA methods a seasonal carbon budget has been established for aLaminaria saccharina population in a Scottish sea-loch. Concurrent studies of photosynthesis, secretion rates, reserve fluctuatio...

    Authors: C. S. Johnston, R. G. Jones and R. D. Hunt
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207859
    Content type: Benthic Ecosystems Published on:

  21. During a fortnight's saturation mission with the Underwater Laboratory (UWL) “Helgoland” in May and June 1975, samples of the macrobenthic fauna of rocks and boulders at 15 m depth in the Lübeck Bay were colle...

    Authors: B. Gulliksen
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207858
    Content type: Benthic Ecosystems Published on:

  24. In the Gulf of Aqaba (Red Sea), 25 species of damselfish (Pomacentridae) which form typical interspecific communities were studied. Several species are typical for different depth zones, others are “ubiquitous...

    Authors: H. W. Fricke
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207851
    Content type: Coral-Reef Ecosystems Published on:

  26. The term “reef” has still to be defined in ecological terms. It is essential to discuss and to classify the most significant characteristics of coral-reef ecosystems. Coral reefs involve a number of interdepen...

    Authors: B. V. Preobrazhensky
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207847
    Content type: Coral-Reef Ecosystems Published on:

  27. The North Inlet marsh — estuarine ecosystem (located at South Carolina, USA) is described via three sub-models: intertidal, benthic-subtidal and water column. The principal storage compartments and fluxes of e...

    Authors: R. Dame, F. Vernberg, R. Bonnell and W. Kitchens
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207846
    Content type: Tidal Ecosystems Published on:

  28. This paper presents a technical description and some preliminary results of a relatively large experimental tidal mud-flat ecosystem, constructed in parallel set-ups in the experimental aquarium of the Nederla...

    Authors: P. A. W. J. de Wilde and B. R. Kuipers
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207845
    Content type: Tidal Ecosystems Published on:

  31. Several different experimental approaches were used to examine recruitment of benthic meiofauna to patches of selected species of algae. In one approach algal-coated, baited slides were incubated in a salt mar...

    Authors: J. J. Lee, J. H. Tietjen, C. Mastropaolo and H. Rubin
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207841
    Content type: Tidal Ecosystems Published on:

  32. The intensity of predation pressure exerted on the macrofauna in muddy sediments was investigated in Königshafen (island of Sylt, eastern North Sea). Tests in aquaria revealed shrimpCrangon crangon, juveniles of ...

    Authors: K. Reise
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207840
    Content type: Tidal Ecosystems Published on:

  34. The reproductibility of tank experiments concerning unicellular marine algal development was analyzed by means of parallel experiments with cultures ofThalassiosira rotula andSkeletonema costatum, using large fle...

    Authors: U. H. Brockmann, K. Eberlein, G. Hentzschel, H. K. Schöne, D. Siebers, K. Wandschneider and A. Weber
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207836
    Content type: Experimental Ecosystems Published on:

  36. A flow-through microcosm facility using unfiltered ocean source water is described. “Stagnation” cleaning has proven to be a simple and effective way of maintaining seawater distribution systems free of foulin...

    Authors: E. C. Evans III
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207834
    Content type: Experimental Ecosystems Published on:

  37. A multispecific closed-circuit sand ecosystem was fuelled by regular addition of soluble amino acids during 28 months (205 g C m−2 year−1). Bacteria and nematode densities undergo a similar evolution, divided int...

    Authors: S. Chamroux, G. Boucher and P. Bodin
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207833
    Content type: Experimental Ecosystems Published on:

  38. A marine microcosm, consisting of a pelagic phase interacting with a benthic phase, is described. Variations in water turnover, turbulence, incident radiation and ratio of pelagic volume to benthic surface are...

    Authors: K. T. Perez, G. M. Morrison, N. F. Lackie, C. A. Oviatt, S. W. Nixon, B. A. Buckley and J. F. Heltshe
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207832
    Content type: Experimental Ecosystems Published on:

  39. A micro-ecosystem, composed of three trophic levels, was built in 1973. Up to the present time (1976) the biological and chemical state has remained essentially the same. The trophic levels are spatially separ...

    Authors: J. Ringelberg
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207831
    Content type: Experimental Ecosystems Published on:

  40. A brief account is given of the Controlled Ecosystem Pollution Experiment (CEPEX) program, with results from a recent experiment disigned to ascertain effects of mercury on planktonic ecosystems. The experimen...

    Authors: G. D. Grice, M. R. Reeve, P. Koeller and D. W. Menzel
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207830
    Content type: Experimental Ecosystems Published on:

  41. The Dalhousie University Aquatron tower tank (10 m deep, 3.66 m in diameter, with viewing ports at regular intervals down its side) can be operated in a continuous flow mode or as a closed system and has progr...

    Authors: R. J. Conover and M. A. Paranjape
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207829
    Content type: Experimental Ecosystems Published on:

  42. The first model in marine ecology was that of the biocoenosis by Moebius (1883), conceived as a self-contained box limited by a finite food resource. This box was almost immediately broken bown by Dean (1893) ...

    Authors: J. W. Hedgpeth
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207828
    Content type: General Aspects Published on:

  45. As part of a project aimed at assessing the available energy in a pelagic system and the efficiency of its transfer, monthly biomass estimates of the 23 main macroplanktonic and mesoplanktonic species have bee...

    Authors: J. B. L. Matthews and J. L. W. Bakke
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207824
    Content type: General Aspects Published on:

  49. Authors: O. Kinne and H. -P. Bulnheim
    Citation: Helgoländer wissenschaftliche Meeresuntersuchungen 1977 30:BF02207819
    Content type: EditorialNotes Published on:
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Helgoland Marine Research

ISSN: 1438-3888

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