Turbellaria from intertidal flats and salt-marshes in the estuaries of the south-western part of the Netherlands

Hydrobiologia ◽  
1977 ◽  
Vol 52 (1) ◽  
pp. 29-32 ◽  
Author(s):  
C. Den Hartog
Keyword(s):  
The Netherlands ◽  
Salt Marshes ◽  
The South ◽  
Intertidal Flats

Towards Control of an Estuary

1987 ◽  
Vol 19 (9) ◽  
pp. 155-174
Author(s):  
Henk L. F. Saeijs
Keyword(s):  
Shallow Water ◽  
Storm Surge ◽  
Salt Marshes ◽  
Large Scale ◽  
Western Europe ◽  
Oxygen Depletion ◽  
Negative Effects ◽  
Intertidal Flats ◽  
Environmental Consequences ◽  
Short Time

The Delta Project is in its final stage. In 1974 it was subjected to political reconsideration, but it is scheduled now for completion in 1987. The final touches are being put to the storm-surge barrier and two compartment dams that divide the Oosterschelde into three areas: one tidal, one with reduced tide, and one a freshwater lake. Compartmentalization will result in 13% of channels, 45% of intertidal flats and 59% of salt marshes being lost. There is a net gain of 7% of shallow-water areas. Human interventions with large scale impacts are not new in the Oosterschelde but the large scale and short time in which these interventions are taking place are, as is the creation of a controlled tidal system. This article focusses on the area with reduced tide and compares resent day and expected characteristics. In this reduced tidal part salt marshes will extend by 30–70%; intertidal flats will erode to a lower level and at their edges, and the area of shallow water will increase by 47%. Biomass production on the intertidal flats will decrease, with consequences for crustaceans, fishes and birds. The maximum number of waders counted on one day and the number of ‘bird-days' will decrease drastically, with negative effects for the wader populations of western Europe. The net area with a hard substratum in the reduced tidal part has more than doubled. Channels will become shallower. Detritus import will not change significantly. Stratification and oxygen depletion will be rare and local. The operation of the storm-surge barrier and the closure strategy chosen are very important for the ecosystem. Two optional closure strategies can be followed without any additional environmental consequences. It was essential to determine a clearly defined plan of action for the whole area, and to make land-use choices from the outset. How this was done is briefly described.

scholarly journals Palynological indications for Silurian – earliest Devonian age strata in the Netherlands

2021 ◽  
Vol 100 ◽  
Author(s):  
Alexander J.P. Houben ◽  
Geert-Jan Vis
Keyword(s):  
The Netherlands ◽  
Core Material ◽  
Late Devonian ◽  
Time Interval ◽  
The South ◽  
Early Devonian ◽  
The North ◽  
Depositional Settings ◽  
Palynological Study ◽  
Devonian Age

Abstract Knowledge of the stratigraphic development of pre-Carboniferous strata in the subsurface of the Netherlands is very limited, leaving the lithostratigraphic nomenclature for this time interval informal. In two wells from the southwestern Netherlands, Silurian strata have repeatedly been reported, suggesting that these are the oldest ever recovered in the Netherlands. The hypothesised presence of Silurian-aged strata has not been tested by biostratigraphic analysis. A similar lack of biostratigraphic control applies to the overlying Devonian succession. We present the results of a palynological study of core material from wells KTG-01 and S05-01. Relatively low-diversity and poorly preserved miospore associations were recorded. These, nonetheless, provide new insights into the regional stratigraphic development of the pre-Carboniferous of the SW Netherlands. The lower two cores from well KTG-01 are of a late Silurian (Ludlow–Pridoli Epoch) to earliest Devonian (Lochkovian) age, confirming that these are the oldest sedimentary strata ever recovered in the Netherlands. The results from the upper cored section from the pre-Carboniferous succession in well KTG-01 and the cored sections from the pre-Carboniferous succession in well S05-01 are more ambiguous. This inferred Devonian succession is, in the current informal lithostratigraphy of the Netherlands, assigned to the Banjaard group and its subordinate Bollen Claystone formation, of presumed Frasnian (i.e. early Late Devonian) age. Age-indicative Middle to Late Devonian palynomorphs were, however, not recorded, and the overall character of the poorly preserved palynological associations in wells KTG-01 and S05-01 may also suggest an Early Devonian age. In terms of lithofacies, however, the cores in well S05-01 can be correlated to the upper Frasnian – lower Famennian Falisolle Formation in the Campine Basin in Belgium. Hence, it remains plausible that an unconformity separates Silurian to Lower Devonian strata from Upper Devonian (Frasnian–Famennian) strata in the SW Netherlands. In general, the abundance of miospore associations points to the presence of a vegetated hinterland and a relatively proximal yet relatively deep marine setting during late Silurian and Early Devonian times. This differs markedly from the open marine depositional settings reported from the Brabant Massif area to the south in present-day Belgium, suggesting a sediment source to the north. The episodic presence of reworked (marine) acritarchs of Ordovician age suggests the influx of sedimentary material from uplifted elements on the present-day Brabant Massif to the south, possibly in relation to the activation of a Brabant Arch system.

scholarly journals A southern North Sea Miocene dinoflagellate cyst zonation

2004 ◽  
Vol 83 (4) ◽  
pp. 267-285 ◽  
Author(s):  
D.K. Munsterman ◽  
H. Brinkhuis
Keyword(s):  
The Netherlands ◽  
North Sea ◽  
North Atlantic ◽  
The South ◽  
Dinoflagellate Cyst ◽  
South Eastern ◽  
Southern North Sea ◽  
Age Model

AbstractAn integrated stratigraphical analysis emphasizing organic-walled dinoflagellate cyst (dinocyst) distribution has been carried out on multiple boreholes penetrating the Miocene in the subsurface of the Netherlands (southern North Sea Basin). The bulk of the investigated successions is attributed to the Breda Formation, a regional lithostatigraphical unit most complete in the south-eastern part of the Netherlands. In concert with a first regional integrated bio (chrono) sequence-stratigraphical framework, fourteen informal dinocyst zones for the southern North Sea Miocene (SNSM), and three subzones are proposed for the Breda Formation. By also integrating (chrono)stratigraphic information from Mediterranean and North Atlantic dinocyst studies a first ever detailed age-model is here proposed for the Miocene in the subsurface of the Netherlands.

Microbiology of surgical site infections after gastrointestinal surgery in the south region of The Netherlands

2014 ◽  
Vol 9 (3) ◽  
pp. 291-298 ◽  
Author(s):  
Amita A Ramcharan ◽  
Casper DJ den Heijer ◽  
Ed EJ Smeets ◽  
Margriet MJ Rouflart ◽  
Frank H van Tiel ◽  
...  
Keyword(s):  
The Netherlands ◽  
Gastrointestinal Surgery ◽  
Surgical Site Infections ◽  
The South

Restoration of salt marshes in the Netherlands

2002 ◽  
pp. 29-51 ◽  
Author(s):  
J. P. Bakker ◽  
P. Esselink ◽  
K. S. Dijkema ◽  
W. E. van Duin ◽  
D. J. de Jong
Keyword(s):  
The Netherlands ◽  
Salt Marshes

Salt marshes along the coast of The Netherlands

1993 ◽  
pp. 73-95 ◽  
Author(s):  
J. P. Bakker ◽  
J. de Leeuw ◽  
K. S. Dijkema ◽  
P. C. Leendertse ◽  
H. H. T. Prins ◽  
...  
Keyword(s):  
The Netherlands ◽  
Salt Marshes

Harlequin Stock-Jobber

2020 ◽  
pp. 61-80
Author(s):  
Joyce Goggin ◽  
Merlijn Erken ◽  
Frans De Bruyn ◽  
Henk Looijesteijn ◽  
Helen J. Paul ◽  
...  
Keyword(s):  
The Netherlands ◽  
Commedia Dell'arte ◽  
The South ◽  
South Sea ◽  
The Rich ◽  
Character Types

This short comic harlequinade is written in the rich and enormously popular theatrical tradition of the Italian commedia dell’arte, imported into the Netherlands via France. Langendijk borrows a range of well-known commedia character types to populate his farce. In a series of twelve scenes he tells the story of Capitano. who plans a voyage to the South Sea (the Mississippi country) to trade in shares. Harlequin, himself a speculator in shares, undertakes to sell Capitano provisions for his voyage. When Capitano discovers that the provisions Harlequin has sold him are nothing but wind-filled bladders and animal guts, a battle ensues between two squadrons armed with inflated pig’s bladders. The cowardly Capitano faints from shock, and Harlequin is taken captive but is set free when he promises to bequeath his paper shares to his captors. The play concludes with Harlequin auctioning off a candle stub, which is handed back and forth between the characters until Gilles, who buys the candle, burns his fingers and drops the stub on a pile of shares that go up flames. The foolish investors are left with nothing, an ending that provides a comic warning to those who risk being burnt by the bubble craze.

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