150
W. Schramm
Pilayella littoralis Kjellm.
Fig.5.8a,b. Changes in macrophytobenthic communities in Puk Lagoon (Gdansk Bay,
Poland) from 1957 to 1988. (After Kruk-Dowgiallo 1991)
~
.,
': '4'
• •
I
--~
~~\
. ~
r
II
,~.f I .:. I .•. (
i"'
,
I,
~.
1
•
~:~: .. l
II,)
!
~_
I,
~ .' 1=
I.,.
\
Greifswalder Bodden
- submerged vegetation -
I'~:il Potamogeton pectinatus
~ Red algae
(maps from 1938 and 1955
reconstructed from SIEFERT 1938
and SUBKLEW 1955)
10 km
i---'---II
Fig. 5.9. Long-term changes in macrophytobenthic communities in the Greifswalder Bodden, southern Baltic. (After Messner and von Oertzen 1991)