surveys give us some knowledge about the occurrence in oceanic sites (Zobell CE. 1946,
Kriss A.E. 1967, Weyland H. 1969, Walker J.D. and Collwell R.R. 1975, Okami Y. and
Okazaki T. 1978, Weyland H. 1981 a).
In the course of our investigations on the bacterial populations of the sea sediments,
actinomycetes could be found repeatedly. These observations gave rise to more detailed
studies on occurrence, distribution, heterogeneity and activity status of actinomycetes in
the marine environment.
MATERIAL AND METHODS
Sediment samples were collected during various cruises of the F.R.V.“Anton Dohrn”,
R. V.“Meteor” and R. V.“Polarstern” using van Veen- and Shipek-grabs or Reineck-box
corers. From immediately prepared dilutions of the top sediment layers pour plate and
spread plate cultures were performed using a variety of media. In mangrove areas usually
small boats and small van Veen-grabs were employed for sampling. In polar regions and
in the Atlantic preliminaries and cultivations were performed at 1°C as well as at 18°C.
Details of cultivation, counting and identification as well as of physiological tests :
temperature characteristics, cation dependence, salinity requirement, barotolerance and
baroresistance are discribed by H. Weyland (1981 a and 1981 b), by E. Helmke (1980 and
1981) and by E. Helmke and H. Weyland (1984).
00*
60*
30*
0*
30*
60*
60 *
30*
O'
30"
60*
RESULTS AND DISCUSSION
Various sea regions were investigated (Fig. 1 ). Results are given from areas of the Norwegian Sea north of the polar circle, off the Faeroe Islands, of the North Sea, of the North
Figure 1 : Investigated areas.
74
Kriss A.E. 1967, Weyland H. 1969, Walker J.D. and Collwell R.R. 1975, Okami Y. and
Okazaki T. 1978, Weyland H. 1981 a).
In the course of our investigations on the bacterial populations of the sea sediments,
actinomycetes could be found repeatedly. These observations gave rise to more detailed
studies on occurrence, distribution, heterogeneity and activity status of actinomycetes in
the marine environment.
MATERIAL AND METHODS
Sediment samples were collected during various cruises of the F.R.V.“Anton Dohrn”,
R. V.“Meteor” and R. V.“Polarstern” using van Veen- and Shipek-grabs or Reineck-box
corers. From immediately prepared dilutions of the top sediment layers pour plate and
spread plate cultures were performed using a variety of media. In mangrove areas usually
small boats and small van Veen-grabs were employed for sampling. In polar regions and
in the Atlantic preliminaries and cultivations were performed at 1°C as well as at 18°C.
Details of cultivation, counting and identification as well as of physiological tests :
temperature characteristics, cation dependence, salinity requirement, barotolerance and
baroresistance are discribed by H. Weyland (1981 a and 1981 b), by E. Helmke (1980 and
1981) and by E. Helmke and H. Weyland (1984).
00*
60*
30*
0*
30*
60*
60 *
30*
O'
30"
60*
RESULTS AND DISCUSSION
Various sea regions were investigated (Fig. 1 ). Results are given from areas of the Norwegian Sea north of the polar circle, off the Faeroe Islands, of the North Sea, of the North
Figure 1 : Investigated areas.
74