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Stream ecological studies on the invertebrate fauna in

Kobbeå

- a typical rift valley stream on the Danish island Bornholm in the Baltic Sea

  by Preben Kristensen pk@ringeby.dk

        FaunaKobbeåPhotosMS ThesisReferencesSearchContactBIOkon.dk

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26) Tingsted Å ca 650 m upstream Kongstubbevej (33UVB89930936) 4-6-2001.

25) Tingsted Å ca 700 m downstream Kongstubbevej (33UVB88820886) captured 4-6-2001.

24) Tingsted Å at Stensgård Bridge 4-6-2001.

23) Blykobbe Å at Store Gadegård (33UVB87260893) 4-6-2001

22) Blykobbe Å in Sursænkedal 21-8-2003 (nedstrøms vejbroen).

21) Blykobbe Å in Sursænkedal 21-8-2003.

20) Blykobbe Å in Sursænkedal 21-8-2003.

19) Blykobbe Å in Sursænkedal 21-8-2003. Here and there there are small ponds, but the oxygen content in those ponds are very low.

18) Blykobbe Å in Sursænkedal 21-8-2003.

17) Blykobbe Å in Sursænkedal 21-8-2003.

16) Blykobbe Å in Sursænkedal 21-8-2003. On the surface of the stones you can find the larvae galleries of the trichoptera Tinodes pallidulus.

15) Blykobbe Å in Sursænkedal 21-8-2003.

14) Blykobbe Å in Sursænkedal 21-8-2003. In the dry summer the stream was completely dry. The reason why the stream dries out is a combination of the sandy underground, and a (too large) extraction of ground water for water supply. Further down the stream (at Blykobbe Bro, picture 6) the water is constant flowing.

13) Blykobbe Å in Sursænkedal 4-6-2001.

12) Blykobbe Å in Sursænkedal 4-6-2001.

11) Blykobbe Å in Sursænkedal.

10) Blykobbe Å in Sursænkedal.

9) Blykobbe Å in Sursænkedal.

8) Blykobbe Å in Sursænkedal. The winter pictures are captured 3-2-2001.

7) Blykobbe Å on the military training ground ("Ådalen") 4-6-2001.

6) Blykobbe Å ca 200 m downstream  Blykobbe Bro (at the main road Rønne-Hasle). April 2001.

5) Blykobbe Å at Vandmøllekroen 6-6-2001.

4) This part of the stream is captured between Prinsens Kilde and Vandmøllekroen.

3) Here is the catch device.

2) Here is the stream at Prinsens Kilde. Blykobbe Å is one of the largest streams on Bornholm. The stream is divided in two parts, and the in the one there is a catch device for catching sea trout on their spawning run.

1) Blykobbe Å at "Nyker Strandvej" (in the bachground), ca 200 m downstream the spring "Prinsens Kilde". This and the next 3 picturesare captured 8-12-2002.