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Registros recuperados: 37
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Benthic communities in the Southern Bight of the North Sea and their use in ecological monitoring OMA
Govaere, J.C.R.; Van Damme, D.; Heip, C.H.R.; De Coninck, L.A.P..
Macrobenthic and meiobenthic communities of an area off the Belgian coast of the North Sea were studied from 1970 until 1975 at 74 stations. On the basis of both macro- and meiobenthos, three zones can be distinguished in the area. The coastal zone is characterized by the macrobenthic <i>Abra alba</i> community, corresponding to the meiobenthic <i>Microarthridion littorale</i>-<i>Halectinosoma herdmani</i> community, and the open sea zone by the macrobenthic <i>Venus gallina</i> community and the meiobenthic <i>Leptastacus laticaudatus-Paramesochra helgolandica</i> community. In between is a transient zone where elements of both other zones mix. The distribution of these zones is governed by the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos Abra alba (W. Wood; 1802) [White furrow shell] Molluscs ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1980 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3661
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Benthos of a sublittoral sandbank in the Southern Bight of the North Sea: general considerations OMA
Willems, K.A.; Vanosmael, C.; Claeys, D.; Vincx, M.; Heip, C.H.R..
The benthic fauna of the Kwinte Bank, a linear sandbank in the Belgian coastal waters of the North Sea, was sampled on ten stations in September 1978. This sandbank shows a linear gradient from fine sandy sediments in the south to coarser sandy sediments in the north as a result of the tidal current pattern in the region. The influence of this gradient on macro- and meiofauna was studied. Diversity of polychaetes and harpacticoid copepods is correlated with median grain size of the sand fraction, diversity of nematodes is not. The influence of station location and sediment characteristics on density of all major macrobenthic groups is very outspoken, and linear density trends are common. This is not true for meiofauna in general and nematodes and copepods...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos Sand banks ANE; Belgium; Flemish Banks; Kwinte Bank ANE; North Sea; Southern Bight.
Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3393
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Dynamic patterns of dissolved nitrogen in the Southern Bight of the North Sea OMA
Baeyens, W.F.J.; Mommaerts, J.-P.; Goeyens, L.; Dehairs, F.A.; Dedeurwaerder, H.; Decadt, G..
Spatial and temporal variations of dissolved inorganic nitrogen (DIN) have been assessed in onshore and offshore areas of the Southern Bight on the basis of several years' measurements. They indicate that both the residual flow lines and DIN isoconcentration lines run parallel with the coast except in the vicinity of important freshwater discharge points such as the Scheldt estuary. Evidence was found that the seasonal DIN oscillations are not created through fluctuations in input conditions at the lateral boundaries, despite considerable fluctuations in these inputs which include the English Channel (from 500 tons(t) N day<sup>-1</sup> in June up to approximately 2000 t N day<sup>-1</sup> in February) and also rivers such as the...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dissolved organic nitrogen ANE; North Sea; Southern Bight.
Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3310
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Effects of alkaline aluminate waste dumping on seawater chemistry OMA
Vandelannoote, R.; Van 't Dack, L.; Van Grieken, R..
The alkaline aluminate waste, of which 1000-2000 tonnes are dumped a few times a year off the Belgian coast in the Southern Bight of the North Sea, contains 5.4% NaCl, 1.8% dissolved Al and 7.4% NaOH, in addition to traces of heavy metals and some aniline- and phenol-derivatives. The pH rises locally to 8.5 and the total Al-concentration reaches 120 mg liter<sup>-1</sup> (corresponding to an initial waste dilution factor of only 150) in the 10-m wide track just beyond the discharging barge, but these decay quickly to pH 8.1 and 1 mg liter<sup>-1</sup> in the 30-m wide track, 500m behind the barge. The relation between the waste concentration and seawater pH was studied. The white precipitate that forms immediately in the sea was...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Alkalinity Aluminium Chemical oceanography Ocean dumping Pollution monitoring Waste disposal ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1987 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3211
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Effects of titanium dioxide industry waste dumping on sea water chemistry OMA
Roekens, E.J.; Van Grieken, R.E..
An investigation was made to determine the influence of the dumping of a 1000 ton day<sup>-1</sup>, on the average, of acid-iron waste from the titanium dioxide industry into the shallow but turbulent Southern Bight of the North Sea. This waste contains some 20% sulphuric acid and 2% iron. After the passage of the barge that discharges 10 ton of waste min<sup>-1</sup> into its wake, the vertical and horizontal distributions of the pH, iron-concentrations and turbidity were measured as a function of time. It appeared that a few seconds after the discharge and for a very brief period, the pH was down to approx. 4 and the Fe-concentration was 13 mg l<sup>-1</sup>. More than 1 min after the discharge a pH below 6 and an...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Dumping Marine chemistry Titanium compounds ANE; North Sea; Southern Bight.
Ano: 1983 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3292
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Epibenthos OMA
Redant, F..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos Check lists Molluscs ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1976 URL: http://www.vliz.be/imisdocs/publications/288150.pdf
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Estimates of dry and wet deposition and resuspension fluxes of several trace metals in the Southern Bight of the North Sea OMA
Dedeurwaerder, H.L.; Dehairs, F.A.; Decadt, G.; Baeyens, W.F.J..
In this study we have investigated air-sea exchanges in the Belgian coastal area located in the Southern Bight of the North Sea. Since 1980 the tropospheric aerosol contents for the trace elements Cd, Cu, Mn, Pb, Zn and for the reference elements Al , Fe, Na have been monitored on an intermittent basis from a maritime sampling platform (Light-Vessel West-Hinder; position: 51°23.5'N- 2°21.5'E, fig. 1). During 1981 sampling campaigns at sea were paralleled by sampling campaigns on land, in the coastal area (natural reserve De Blankaert, located at 20 Km inland), in order to allow for a better evaluation of the specific source or sink role of the sea. No major source of pollution exists between the maritime and the continental sampling sites. During these...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Aeolian deposits Resuspension Trace metals ANE; North Sea; Southern Bight.
Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3323
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Free-living Plathelminthes from the Belgian coast and adjacent areas OMA
Schockaert, E.R.; Jouk, P.E.H.; Martens, P.M..
From own observations and data from the literature. a species list is given of the free-living Plathelminthes which occur on the Belgian coast. in the Netherlands Delta area en some localities in Northern France. In the whole area considered over 250 species have been observed more than 150 of them are from Belgian sandy beaches. some sublitoral stations and/or brackish water areas.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Platyhelminthes ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1989 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7365
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Het meiobenthos in de zuidelijke Noordzee OMA
Van Damme, D.; Heip, C.H.R..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos Check lists ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1976 URL: http://www.vliz.be/imisdocs/publications/156192.pdf
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Influence de la circulation des masses d'eaux dans la dynamique du peuplement <i>Abra alba</i> de la Baie sud de la mer Nord = Influence of the circulation of water masses in the dynamics of the population <i>Abra alba</i> of the southern Bay of the North Sea OMA
Dewarumez, J.-M.; Belgrano, A.; Craeymeersch, J.A.; Duquesne, S.; Heip, C.H.R.; Hilde, D.; Vincx, M..
Tipo: Info:eu-repo/semantics/article Palavras-chave: Abra alba (W. Wood; 1802) [White furrow shell] ANE; North Sea; Southern Bight.
Ano: 1993 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7253
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<i>Boreopontia heipi</i> n.g., n.sp., an interstitial harpacticoid (Copepoda) from the Southern Bight of the North Sea OMA
Willems, K.A..
During a comprehensive investigation of the meiofauna of the Kwinte Bank, a sandbank in the Southern Bight of the North Sea, several specimens were collected of an interstitial harpacticoid of the family Cylindropsyllidae, representing a new genus. These specimens, referred to as <i>Arenopontia</i> sp. A by Willems <i>et al</i>. (in press), occurred in two stations with a pure, very well sorted coarse sand. The physical characteristics were: a median grain size: 402-517 µm; sorting: 0.30-0.24 Ø; mud (<63 µm) content: 0.05-0 % ; gravel (>2000 µm) content: 1.13-0.24 %. The copepod association was dominated by <i>Interleptomesochra eulittoralis</i> Noodt, 1952). <i>Leptastacus laticaudatus intermedius</i>...
Tipo: Info:eu-repo/semantics/article Palavras-chave: New genera New species Boreopontia heipi Willems; 1981 Copepoda [copepods] Harpacticoida ANE; Belgium; Flemish Banks; Kwinte Bank ANE; North Sea; Southern Bight.
Ano: 1981 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3411
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<i>Echinoderes higginsi</i> sp. n. (Kinorhyncha, Cyclorhagida) from the southern North Sea with a key to the genus <i>Echinoderes</i> Claparède OMA
Huys, R.; Coomans, A..
Echinoderes higginsi sp.n. is described from shallow subtidal sand north of the mouth of the Westerscheldt estuary, The Netherlands. The species is compared with other species having the same spine formulac. It appears to be most closely related to E. kristenseni Higgins. 1983 and, to a lesscr extent. to E. riedli Higgins, 1966. Condyldres multispinosus (McIntyre. 1962) is reported from the same locality, the first report of this centroderid kinorhynch since the original description. Some additional information on E. levunderi Karling, 1954 is presented. The presence of lateroventral adhesive tubes on the fourth segment, lateral spines on segment 7 and small additional setae on segment 12 in the male is noted. Echinoderes canariensis Greeff, 1869 and E....
Tipo: Info:eu-repo/semantics/article Palavras-chave: New species ANE; Netherlands; Westerschelde ANE; North Sea; Southern Bight.
Ano: 1989 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=7083
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<i>Syrticola flandricus</i> n.g., n.sp., a harpacticoid copepod from the Southern Bight of the North Sea OMA
Willems, K.A.; Claeys, D..
During a comprehensive study of the macro- and meiobenthos of the Kwintebank, a sandbank in the Southern Bight of the North Sea, eleven female specimens of a cylindropsyllid, belonging to a new genus, were collected from one of the stations sampled. The station's coordinates are 51°18'00''N 2°40'10''E. The sediment at this stations is a pure, very well sorted, coarse sand (median grain size: 517 µm; sorting: 0.24; mud<63µm: 0%) with a harpacticoid community similar to the <i>Leptastacus laticaudatus-Paramesochra helgolandica</i>- community from the "Open Sea" Zone described by Govaere et al. (1980). All specimens have been deposited at the "Koninklijk Belgisch Instituut voor Natuurwetenschappen", Vautierstraat 31, B-1040 Brussels, under no....
Tipo: Info:eu-repo/semantics/article Palavras-chave: New genera New species Copepoda [copepods] Syrticola flandricus Willems & Claeys; 1982 ANE; North Sea; Southern Bight.
Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3423
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Macrobenthos of a sublittoral sandbank in the Southern Bight of the North Sea OMA
Vanosmael, C.; Willems, K.A.; Claeys, D.; Vincx, M.; Heip, C.H.R..
The benthic fauna of a linear sandbank, the Kwinte Bank, in the Belgian coastal waters of the North Sea was sampled on ten stations in September 1978. Density and species composition of the macrofauna and sediment characteristics have been studied. The Kwinte Bank shows a gradient from finer sediments in the south to coarser sediments in the north, resulting from the tidal current pattern in the region, and can be considered as a biogeographical island as the bank is surrounded by a region of much finer sediments. The macrofauna consists of 73 identified species and has an average density of 4910 ind./m² and an average diversity of 2.5 bits/ind. Interstitial polychaetes predominate and among those <i>Hesionura augeneri</i> is the most abundant...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Benthos Sand banks ANE; Belgium; Flemish Banks; Kwinte Bank ANE; North Sea; Southern Bight.
Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3390
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MAST III - The optimisation of crest level design of sloping coastal structures through prototype monitoring and modelling (OPTICREST) - contract MAS3-CT97-0116: detailed scientific and technical report OMA
De Rouck, J.; Boone, C.; Van de Walle, B..
Tipo: Info:eu-repo/semantics/book Palavras-chave: Coastal engineering Coastal waters Modelling Wave crests ANE; Belgium; Brugge; Zeebrugge ANE; North Sea; Southern Bight.
Ano: 2001 URL: http://www.vliz.be/imisdocs/publications/262263.pdf
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Mathematical model of the nitrogen cycle in the Southern Bight of the North Sea OMA
Pichot, G.; Runfola, Y..
The nitrogen cycle between dissolved inorganic and organic matter, phytoplankton, zooplankton, non living particulate organic matter, and sediments is studied in the ecosystem formed by the Southern Bight of the North Sea. A consistent pattern of mean annual fluxes of nitrogen based on the primary production and the zooplankton grazing is set up. A mathematical model describing the dynamic behaviour of nutrients, phytoplankton, zooplankton and dissolved organic matter is proposed. The results of the simulation fairly well fit the recent observations made in the frame of the Math. Model Sea Research Programme.
Tipo: Info:eu-repo/semantics/article Palavras-chave: ANE; North Sea; Southern Bight.
Ano: 1976 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3535
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Meiobenthos of a sublittoral sandbank in the Southern Bight of the North Sea OMA
Willems, K.A.; Vincx, M.; Claeys, D.; Vanosmael, C.; Heip, C.H.R..
The meiofauna of a subtidal linear sandbank, the Kwinte Bank, in the Belgian coastal waters of the North Sea was analysed, with particular reference to the nematodes and harpacticoids. Nematodes are evenly spread over the whole sandbank but species differ. Diversity is very high (on average 3.8 bit /ind.) and 136 species were identified. Density on the contrary is low (on average 384 ind./10 cm²). Three species groups can be distinguished which are correlated with sediment characteristics. All trophic groups of nematodes are equally distributed within the sediment. Copepods are both more numerous and more diverse in the coarser sediments of the northern side of the sandbank. One cyclopoid and 65 harpacticoid species were identified with an average...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Meiobenthos Sand banks Harpacticoida Nematoda [Nematodes] ANE; Belgium; Flemish Banks; Kwinte Bank ANE; North Sea; Southern Bight.
Ano: 1982 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3394
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Mercury and organochlorines in four sperm whales stranded on the Belgian coast, November 1994 OMA
Joiris, C.R.; Holsbeek, L.; Bossicart, M.; Tapia, G..
Four sperm whales (three subadult males stranded on the Belgian coast, a fourth older male found dead at sea) were analysed for total mercury, methylmercury and organochlorines. All four were part of a total of 24 sperm whales that stranded on the North Sea coasts over a period of six months, a highly unusual phenomenon. Total mercury levels ranged from 0.5 µg/g fw in kidney and 1 in muscle, up to 15 in liver. The finding of at least 90% of the mercury in its inorganic form confirms the existence of detoxification mechanisms in the liver of cetaceans. PCB concentrations in muscle, liver, kidney and blubber ranged from 10 to 25 µg/g lipids. These results are in the same order of magnitude as literature data, which however does not imply that there is no...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Detoxification Mercury Social behaviour Stranding ANE; Belgium ANE; North Sea; Southern Bight.
Ano: 1997 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=837
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Nitrogen cycling and budget in Belgian coastal waters: North Sea areas with and without river inputs OMA
Mommaerts, J.-P.; Pichot, G.; Ozer, J.; Adam, Y.A.; Baeyens, W.F.J..
The coastal sea off Belgium has been extensively studied for a number of years on a multidisciplinary basis. Thus the stocks within the system's various compartments as well as the carbon or nitrogen fluxes between them resulting from biological activity at several trophic levels have been measured. Further, the tidal and residual circulations have been investigated and modeled in addition to the erosive properties of the flow. There are strong differences between the more coastal part of this area and the open sea. In particular, inputs from rivers and channels seem to exert an influence beyond what could normally be expected in coastal areas.Adequate modelling of the nitrogen cycle in such a diverse environment demanded a fine approach, including a...
Tipo: Info:eu-repo/semantics/article Palavras-chave: Nitrogen cycle River inflow ANE; Belgium; Belgian Coast ANE; North Sea; Southern Bight.
Ano: 1984 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3333
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North Sea spawning grounds of the sole (<i>Solea solea</i>) located from the 1984 Belgian plankton survey OMA
Borremans, C..
During spring 1984 large ichthyoplankton surveys were performed to determine the spawning period and the spawning places of the sole in the Southern Bight of the North Sea. In March and April most eggs were found close to the Belgian coast and the coast of Brittany, which agrees with results of previous plankton surveys. In the second of the surveys, however, high densities were also found at stations about 50 km from the coast -in the open sea. An attempt is made to explain whether these early eggs were laid in the locality, contrary to what is normally accepted, or drifted there from the Belgian or the English coast.
Tipo: Info:eu-repo/semantics/article Palavras-chave: Plankton surveys Spawning grounds Solea solea [Sole] ANE; Belgium; Belgian Coast ANE; British Isles; England; English Coast ANE; North Sea; Southern Bight.
Ano: 1987 URL: http://www.vliz.be/nl/open-marien-archief?module=ref&refid=3229
Registros recuperados: 37
Primeira ... 12 ... Última
 

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