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Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368413
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Larvae of uncommon caridean decapods in the German Bight: Species composition, distribution and abundance
Typically, the most abundant group of shrimp larvae in the German Bight is formed by representatives of the family Crangonidae. Larvae of the remaining species have been largely ignored, and only scarce inform...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368408 -
Diel vertical migrations ofMeganyctiphanes norvegica in the Kattegat: Comparison of net catches and measurements with Acoustic Doppler Current Profilers
Diel vertical migration of a stable and well-defined population of Nordic krill,Meganyctiphanes norvegica (Crustacea, Euphausiacea) was investigated during eight days in August 1989, in the Läsö-Deep, East of the...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368407 -
Rostock zooplankton studies off West Africa
Since the beginning of the seventies, upwelling research has become increasingly popular in the path of the Canary and Benguela Current, because of economic consideration, particularly in the relation to fishe...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368406 -
North Sea research: Where might it go?
Seven research suggestions are discussed: the phenomenon of the rare species, the life conditions of meiofauna in suboxic sediment layers, the part-time dormancy of animals and bacteria in the sediment, the im...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368393 -
Organotin compounds and aquatic bacteria: A review
Organotins are toxic to microorganisms. Trisubstituted organotins (R3SnX) are considered more toxic than disubstituted (R2SnX2) or monosubstituted (RSnX3) compounds, and tetrasubstituted compounds (R4Sn) are not ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368390 -
The implications of the precautionary principle for biological monitoring
Marine biological monitoring programmes frequently attempt to determine “safe” levels of contamination, based on assumptions about the assimilative capacity of the environment. This paper argues that such assu...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368389 -
Marine systems analysis and modeling
Oceanography and marine ecology have a considerable history in the use of computers for modeling both physical and ecological processes. With increasing stress on the marine environment due to human activities...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368387 -
Spatial and temporal variation in mercury contamination of seabirds in the North Sea
Once the moult patterns have been taken into account, feather methylmercury levels can be used to accurately measure the mercury burdens of seabirds. We used body feathers from live seabirds and from museum co...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368386 -
Structure of the invertebrate fauna in salt marshes of the Wadden Sea coast of Schleswig-Holstein influenced by sheep-grazing
Results of investigations on the influence of five different sheep grazing intensities on the invertebrate fauna of two mainland salt marsh sites of the German Wadden Sea coast are presented for the years 1990...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368383 -
A century of oceanographic and fisheries exploration on the continental shelf off Argentina
A detailed analysis is presented of the main contributions, both local and international, to the fields of oceanography and fishery sciences resulting from exploratory cruises carried out on the continental sh...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368375 -
A North Adriatic centenarian: The marine research station at Rovinj
The institute in Rovinj was founded in 1891 as the field station of the Berlin Aquarium. It soon gained in scientific importance. From 1911, it was governed by various scientific bodies, such as the ‘Kaiser-Wi...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368371 -
Dinoflagellate resting cysts as factors in phytoplankton ecology of the North Sea
The occurrence and distribution of dinoflagellate resting cysts were investigated at 11 locations in the south-eastern part of the North Sea. Twenty-six known cyst species and 7 unknown cyst types, which may a...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368363 -
Importance and abundance of the recently established speciesCoscinodiscus wailesii Gran & Angst in the German Bight
Grids of 17 to 50 stations in the German Bight were sampled 18 times within the framework of the multidisciplinary programmes ZISCH and PRISMA in winter and spring of 1988/89 and from April 1991–April 1992. Th...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368362 -
The importance of long time-series in understanding the variability of natural systems
The Marine Biological Association possesses long time-series of data on the biota and environment of the western English Channel. These series are of value in tracing the influence of climate change on marine ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368360 -
Benthic community structures in the North Sea
Coherent assemblages of marine benthic species have been recognized from the early twentieth century, and the classical papers of Petersen (1914, 1918) were based on studies of limited areas in the North Sea. ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368359 -
Ecology of the North Sea: Problems, successes, failures, future needs
After defining ‘ecology’, outlining the basic categories of ecological research and listing examples of modern ecological investigations, this introductory paper focusses on basic considerations; it is, in ess...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368358 -
Trophic interactions between zooplankton andPhaeocystis cf.globosa
Mesozooplankton grazing onPhaeocystis cf.globosa was investigated by laboratory and field studies. Tests on 18 different species by means of laboratory incubation experiments, carried out at the Biologische Ansta...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368356 -
Induction and regulation of metamorphosis in planktonic larvae:Phoronis mülleri (Tentaculata) as archetype
The larvae ofPhoronis mülleri are comprised of many diverse behavioural forms that can be manipulated experimentally to facilitate precise assertions about the induction of metamorphosis. Various parameters for i...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368355 -
Guest research facilities at the Biologische Anstalt Helgoland: Past and present
The Biologische Anstalt Helgoland (BAH) offers unique possibilities for research and education in marine sciences in the southern part of the North Sea. Besides its own research duties, the Institute provides ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368354 -
Correlation of viable cell counts, metabolic activity of sulphur-oxidizing bacteria and chemical parameters of marine sediments
Viable counts of aerobic and anaerobic chemotrophic sulphur-oxidizers as well as phototrophic sulphur bacteria were determined in sediment samples taken from two different areas along the Baltic Sea shore whic...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368352 -
Microbial colonization of copepod body surfaces and chitin degradation in the sea
Next to cellulose, chitin (composed of N-acetyl-D-glucosamine sugar units) is the most frequently occurring biopolymer in nature. Among the most common sources of chitin in the marine environment are copepods ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368350 -
Microbial hydrolytic enzyme activities in deep-sea sediments
The potential hydrolysis rates of five different hydrolytic enzymes were determined in deep-sea sediments from the northeast Atlantic (BIOTRANS area) in March 1992. Fluorogenic substrates were used to assay ex...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368348 -
Efficiency of uronic acid uptake in marine alginate-degrading fungi
Despite the fact that many marine fungi, including phycomycetes, yeasts, ascomycetes and hyphomycetes, have been recorded from living and/or dead phaeophytes, only a few of these have been shown to be capable ...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368346 -
Oil pollution in the North Sea—a microbiological point of view
In this study we determined oil degradation rates in the North Sea under most natural conditions. We used the heavy fuel oil, Bunker C, the major oil pollutant of the North Sea, as the model oil. Experiments w...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368345 -
Highlights and sidelights of early Biology on Helgoland
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368338 -
From marine ecology to biological oceanography
Looking back from the 1990s it seems natural to view the work done in the Biologische Anstalt Helgoland by Friedrich Heincke and his colleagues, beginning in 1892, as marine ecology or marine biology, and that...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368334 -
Science and organization in open-sea research: The plankton
Looking forward on this occasion, rather than reviewing the past 100 years, it appears that 100 years hence, we will have to manage the environment worldwide like a global garden. How will the ecological knowl...
Citation: Helgoländer Meeresuntersuchungen 1995 49:BF02368329 -
Buchbesprechungen
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366259 -
Ultrastructure and functional morphology of the protonephridia and segmental fenestrated lacunae inProtodrilus rubropharyngeus (Polychaeta, Protodrilidae)
The protonephridia ofProtodrilus rubropharyngeus are described. They consist of a terminal cell, one nephridiopore cell, and different types of duct cells (proximal, medial, distal) with the duct running intracel...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366258 -
Hatching rhythms and dispersion of decapod crustacean larvae in a brackish coastal lagoon in Argentina
Mar Chiquita, a brackish coastal lagoon in central Argentina, is inhabited by dense populations of two intertidal grapsid crab species,Cyrtograpsus angulatus andChasmagnathus granulata. During a preliminary one-y...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366257 -
Phytoplankton and the physical environment in the Helgoland region
The phytoplankton development in the waters around Helgoland can be described as a function of the physical environment (derivates of the temperature). This is a consequence of the fundamental annual cycle reg...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366256 -
Annual variation in condition, respiration and remineralisation ofMytilus edulis L. in the Sound, Denmark
By means of monthly in situ incubations, variations in oxygen uptake, nutrient release and C/N-ratio were monitored during a period of 14 months of a mussel population (Mytilus edulis L.) located on an exposed be...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366255 -
Growth and reproduction of an estuarine population of the colonial hydroidCordylophora caspia (Pallas) in the northern Baltic Sea
Growth and reproduction of the colonial hydroidCordylophora caspia were monitored during the breeding season in natural conditions. In 1987, a life history study was carried out on the upright stems of the main s...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366254 -
Meeresalgen von Helgoland: Zweite Ergänzung
This investigation complements two previous publications by Kornmann & Sahling [1977, 1983]. The paper summarizes floristic changes that have taken place in the marine macroalgal flora of Helgoland, North Sea,...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366253 -
Redescription ofGymnodinium heterostriatum Kofoid et Swezy 1921 (Dinophyceae)
The dinoflagellateGymnodinium heterostriatum Kofoid et Swezy is described anew from live material of the upwelling region off the NW African coast. The characteristics that distinguish it fromGymnodinium striatis...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02366252 -
Evidence for tidally-induced vertical migration of some gelatinous zooplankton in the Wadden Sea area near Sylt
Gelatinous zooplankton is more abundant in the Wadden Sea area of North Sylt than in the adjacent North Sea. The hypothesis is tested that medusae maintain their position in the North Sylt Wadden Sea by ascend...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367045 -
Recruitment of shore crabsCarcinus maenas on tidal flats: Mussel clumps as an important refuge for juveniles
During the late summer and early fall, juvenile shore crabs (Carcinus maenas L.) occurred in high abundances in mussel clumps scattered on tidal flats of the Wadden Sea. Abundances were much lower on bare tidal f...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367044 -
Drifting meio- and macrobenthic invertebrates on tidal flats in Königshafen: A review
Many benthic species have been recorded to occur in the water column above the tidal flats in Königshafen. They were either passively suspended from the sediment or performed active migrations. Concerning both...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367043 -
Turnover of postlarval bivalves in sediments of tidal flats in Königshafen (German Wadden sea)
After larval settlement, juvenile bivalves may rapidly re-enter the water column and attain secondary dispersal by byssus-drifting. In order to estimate the quantitative importance of byssus-drifting, the abun...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367042 -
Response of macrofauna to drifting tidal sediments
The effect of hydrodynamically-mobilized sediment on abundance and vertical distribution of macrobenthic fauna was studied in Königshafen, a sheltered tidal bay at the northern end of the Island of Sylt (North...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367041 -
Effects ofFucus vesiculosus covering intertidal mussel beds in the Wadden Sea
The brown algaFucus vesiculosus formamytili (Nienburg) Nienhuis covered about 70% of mussel bed (Mytilus edulis) surface area in the lower intertidal zone of Königshafen, a sheltered sandy bay near the island of ...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367039 -
Grazing on green algae by the periwinkleLittorina littorea in the Wadden Sea
On sedimentary tidal flats in the Wadden Sea near the Island of Sylt, the periwinkleLittorina littorea occurred preferentially on clusters and beds of mussels and on shell beds (100 to 350 m−2), achieved moderate...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367038 -
Benthic grazers and suspension feeders: Which one assumes the energetic dominance in Königshafen?
Size-frequency histograms of biomass, secondary production, respiration and energy flow of 4 dominant macrobenthic communities of the intertidal bay of Königshafen were analysed and compared. In the shallow sa...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367037 -
Biomass and abundance of macrofauna in intertidal sediments of Königshafen in the northern Wadden Sea
Intertidal sediments of Königshafen (Island of Sylt, North Sea) were sieved for mesofauna (>0.25 mm) and macrofauna (>1 mm) in spring and autumn 1990. Although sediments are coarser than in other parts of the...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367036 -
Hydrodynamics and particulate matter budget of Königshafen, southeastern North Sea
A basic control mechanism for the input and output of materials in the Königshafen, a sandy backbarrier embayment, is the action of the tides. Thus, the description of the hydrodynamic conditions provides basi...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367035 -
A comparison of summer nutrient data obtained in Königshafen Bay (North Sea, German Bight) during two investigation periods: 1979–1983 and 1990–1992
A comparison of summer nutrients obtained during the investigation periods 1979–1983 and 1990–1992 was made, to elucidate whether or not changes have occurred in Königshafen Bay during the last decade. In both...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367034 -
The surficial sediments of Königshafen-variations over the past 50 years
The investigation highlights the untypical nature of the intertidal sediments of the sheltered Königshafen embayment in the north of the island of Sylt. The area is characterized by medium sand, which might be...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367033 -
The development of northern Sylt during the Latest Holocene
Former stages of the morphological development of northern Sylt are reconstructed to extend knowledge of the type and approximate time of the formation of a sandy bay (Königshafen) in the Wadden Sea. Apart fro...
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367032 -
Königshafen: The natural history of an intertidal bay in the Wadden Sea — an introduction
Citation: Helgoländer Meeresuntersuchungen 1994 48:BF02367031