Over De Invloed Van Enkele Fysico-Chemische Faktoren Op De Faunistische Rijkdom Van De Noordoost-Vlaamse Kreken

  • H. Gysels
Artikelen

Influence of some physical and chemical factors on the faunistic importance of the creeks in the north of the province of east — flanders

Summary

In the north of the province of East-Flanders, extending from some 30 km north-west of Ghent to north-west of Antwerp, and also along the river Scheldt, there are a lot of inland waters called "kreken" (creeks). They are the remains of consecutive dike ruptures, some of which go back to medieval times.

In general the water of the creeks is slightly brackish: the chloride content generally varies between 0.6 and 1.8 g Cl per litre. One southern creek however, more distant from the river, may be considered as a freshwater biotope (0.14 g Cl per litre), while on the other hand the north-west group is more brackish (2.2–3.65 g Cl per litre).

The creeks have well-buffered waters and are very productive of planktonic and other life. As the waters mostly are oligohaline, many fresh water species are present, but one should note that these are also euryhaline species, i.e. that they can withstand considerable changes in the salinity of the waters in which they live. Most characteristic, however, are the invertebrates which are more or less confined to the brackish biotopes.

Although merely lifted from a preliminary inventory, the faunistic lists of this paper illustrate the considerable scientific importance of the creeks sufficiently. Physicochemical data obtained by water analysis and considerations upon their importance in relation with animal life are added; finally a plea is made for conservation of these unique natural sites.

Preview

Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.

Literatuur

  1. DUMONT, H.J. et H. GYSELS, 1972. Etude faunistique et écologique sur les criques de la Flandre Orientale et le long de l'Escaut. Considérations sur leur chimisme, leur faune planctonique, entomologique et malacologique et discussion de leur état biologique actuel. Ann.Soc.R.Belg., 101 (3): 157–182.Google Scholar
  2. GOETGHEBUER, M., 1937. Une excursion au Boerenkreek à St.Jean-in-Eremo. Bull.Ann.Soc.ent.Belg., 77: 35–36.Google Scholar
  3. MASSART, J., 1912. Pour la protection de la nature en Belgique. Lamertin, Brussel, 308 p.Google Scholar
  4. MEEL, L. van, 1960. Etudes hydrobiologiques sur les eaux saumâtres de la Belgique. IV. Les criques au Nord de la province de Flandre-Orientale (Période 1951–1958). Med.K.B.I.N., 36, (38): 86 p.Google Scholar
  5. RIDDER, M. de, 1956. Bijdrage tot de kennis van het chemisme der brakke wateren van België. Biol.Jb.Dodon., 23: 72–103.Google Scholar
  6. RIDDER, M. de, 1957. Onderzoekingen over brakwaterrotatoriën. I. De Rode Geul te Assenede. Biol.Jb.Dodon., 24: 89–131.Google Scholar
  7. RIDDER, M. de, 1960. Onderzoekingen over brakwaterrotatoriën. VIII. De Grote Geul te Kieldrecht. Natuurwet.Tijdschr., 41: 105–116.Google Scholar
  8. RIDDER, M. de, 1962. Onderzoekingen over brakwaterrotatoriën. IX. De Boerenkreek en de Oostpolderkreek te St.Jan-in-Eremo (O.Vl.). Biol.Jb.Dodon., 30: 60–69.Google Scholar

Copyright information

© Kluwer Academic Publishers 1972

Authors and Affiliations

  • H. Gysels
    • 1
  1. 1.Instituut voor DierkundeRijks-Universiteit van GentBelgium

Personalised recommendations