Summary

Vertically stratified microbial communities of phototrophic bacteria in the upper intertidal zones of the North Sea island of Mellum were investigated. Growth and population dynamics of the cyanobacterial mat were followed over three successive years. It was concluded that the initial colonization of the sandy sediments was by the cyanobacterium Oscillatoria. In well-established mats, however, the dominant organism was Microcoleus chthonoplastes. The observed succession of cyanobacteria during mat development is correlated with nitrogen fixation. Nitrogen fixation is necessary in this low-nutrient environment to ensure colonization by mat-constructing cyanobacteria. Under certain conditions, a red layer of purple sulfur bacteria developed underneath the cyanobacterial mat in which Chromatium and Thiocapsa spp. dominated, but Thiopedia and Ectothiorhodospira spp. have also been observed. Measurements of light penetrating the cyanobacterial mat indicated that sufficient light is available for the photosynthetic growth of purple sulfur bacteria. Profiles of oxygen, sulfide and redox potential within the microbial mat were measured using microelectrodes. Maximum oxygen concentrations, measured at a depth of 0.7 mm, reached levels more than twice the normal air saturation. Dissolved sulfide was not detected by the microelectrodes. Determination of acid-distilled sulfide, however, revealed appreciable amounts of bound sulfide in the mat. Redox profiles measured in the mat led to the conclusion that the upper 10 mm of the sedimentary sequence is in a relatively oxidized state.

References

[1]
Krumbein
W.E.
Cohen
Y.
Shilo
M.
(
1977
)
Solar Lake (Sinai), 4. Stromatolitic cyanobacterial mats
Limnol. Oceanogr.
 ,
22
,
635
656
.
[2]
Javor
B.
Castenholz
R.W.
(
1981
)
Laminated microbial mats, Laguna Guerrero Negro, Mexico
Geomicrobiol. J.
 ,
3
,
237
273
.
[3]
Jørgensen
B.B.
Revsbech
N.P.
Cohen
Y.
(
1983
)
Photosynthesis and structure of benthic microbial mats: microelectrode and SEM studies of four cyanobacterial communities
Limnol. Oceanogr.
 ,
28
,
1075
1093
.
[4]
Bauld
J.
(
1984
)
Microbial mat in marginal marine environments; Shark Bay, Western Australia and Spencer Gulf, South Australia
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
39
58
Alan R. Liss
,
New York
.
[5]
Krumbein
W.E.
Cohen
Y.
(
1974
)
Biogene, klastische und evaporitische Sedimentation in einem mesothermen monomiktischen ufernahen
Geol. Rundschau
 ,
63
,
1035
1065
See.
[6]
Gerdes
G.
Krumbein
W.E.
(
1984
)
Animal communities in recent potential stromatolites of hypersaline origin
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
59
83
Alan R. Liss
,
New York
.
[7]
Castenholz
R.W.
(
1984
)
Composition of hot spring microbial mats: a summary
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
101
119
Alan R. Liss
,
New York
.
[8]
Golubic
S.
(
1973
)
The relationship between blue-green algae and carbonate deposits
In
The Biology of Blue-Green Algae
 
Carr
N.G.
Whitton
B.A.
, Eds) In Botanical Monographs, Vol.
9
, pp
434
472
Blackwell
,
Oxford
.
[9]
Golubic
S.
(
1976
)
Organisms that build stromatolites
Walter
M.R.
, Ed) In
Developments in Sedimentology
 ,
20
, Stromatolites, pp
113
126
Elsevier
,
Amsterdam
.
[10]
Gerdes
G.
Krumbein
W.E.
Holtkamp
E.
(
1985
)
Salinity and water activity related zonation of microbial communities and potential stromatolites of the Gavish Sabkha
In
Hypersaline Ecosystems — The Gavish Sabkha
 
Friedman
G.M.
Krumbein
W.E.
, Eds) pp
238
266
Springer
,
Berlin
.
[11]
Margulis
L.
Barghoorn
E.S.
Ashendorf
D.
Banerjee
S.
Chase
D.
Francis
S.
Giovannoni
S.
Stolz
J.
(
1980
)
The microbial community in the layered sediments at Laguna Figueroa, Baja California, Mexico: does it have Precambrian analogues
Precambrian Res.
 ,
11
,
93
123
.
[12]
Walter
M.R.
(
1976
)
Introduction
Walter
M.R.
, Ed) In
Developments in Sedimentology
 ,
20
, Stromatolites, pp
1
3
Elsevier
,
Amsterdam
.
[13]
Örstedt
O.S.
(
1842
)
Beretnung om en Exkursion til Trindelen
Naturhist. Tidskrift
 ,
3
,
552
569
.
[14]
Schulz
E.
(
1937
)
Das Farbstreifen-Sandwatt und seine Fauna, eine ökologische biozönotische Untersuchung an der Nordsee
Kieler Meeresforsch.
 ,
1
,
359
378
.
[15]
Schulz
E.
Meyer
H.
(
1939
)
Weitere Untersuchungen über das Farbstreifen-Sandwatt
Kieler Meeresforsch.
 ,
1
,
321
336
.
[16]
Hoffmann
C.
(
1942
)
Beiträge zur Vegetation des Farbstreifen-Sandwattes
Kieler-Meeresforsch.
 ,
4
,
85
108
.
[17]
Stal
L.J.
Krumbein
W.E.
van Gemerden
H.
(
1984
)
Das Farbstreifen-Sandwatt — ein laminiertes mikrobielles Ökosystem im Wattenmeer
Veröff. Naturf. Ges. Emden
 ,
1984/1987
,
1
60
.
[18]
Stal
L.J.
Grossberger
S.
Krumbein
W.E.
(
1984
)
Nitrogen fixation associated with the cyanobacterial mat of a marine laminated microbial ecosystem
Mar. Biol.
 ,
82
,
217
224
.
[19]
Hartung
W.
(
1975
)
Mellum als eine werdende Nordseeinsel
In
Naturschutzgebiete im Oldenburgerland
 
Blaszyk
P.
, Ed) pp
11
26
Holzberg
,
Oldenburg
.
[20]
Rippka
R.
Deruelles
J.
Waterbury
J.B.
Herdman
M.
Stanier
R.Y.
(
1979
)
Generic assignments, strain histories and properties of pure cultures of cyanobacteria
J. Gen. Microbiol.
 ,
111
,
1
61
.
[21]
Geitler
L.
(
1932
) (
Kolkwitz
R.
, Ed) Vol.
14
, In
Cyanophyceae, Rabenhorst's Kryptogamen-Flora
 , pp
1196
Akad. Verlagsgesellsch
,
Leipzig
.
[22]
Krumbein
W.E.
Giele
C.
(
1979
)
Calcification in a coccoid cyanobacterium associated with the formation of desert stromatolites
Sedimentology
 ,
26
,
593
604
.
[23]
Stal
L.J.
van Gemerden
H.
Krumbein
W.E.
(
1984
)
The simultaneous assay of chlorophyll and bacteriochlorophyll in natural microbial communities
J. Microbiol. Methods
 ,
2
,
295
306
.
[24]
Revsbech
N.P.
Jørgensen
B.B.
Blackburn
T.H.
Cohen
Y.
(
1983
)
Microelectrode studies of the photosynthesis and O2, H2S and pH profiles of a microbial mat
Limnol. Oceanogr.
 ,
28
,
1062
1074
.
[25]
Clark
L.C.
Wolf
R.
Granger
D.
Taylor
Z.
(
1953
)
Continuous recording of blood oxygen tensions by polarography
J. Appl. Physiol.
 ,
6
,
189
193
.
[26]
Berner
R.A.
(
1963
)
Electrode studies of hydrogen sulfide in marine sediments
Geochim. Cosmochim. Acta
 ,
27
,
563
575
.
[27]
Fenchel
T.
(
1969
)
The ecology of the marine microbenthos IV: structure and function of the benthic ecosystem, its chemical and physical factors and the microfauna communities, with special reference to the ciliated protozoa
Ophelia
 ,
6
,
1
182
.
[28]
Van Gemerden
H.
(
1968
)
Growth measurements of Chromatium cultures
Arch. Mikrobiol.
 ,
64
,
103
110
.
[29]
Trüper
H.G.
Schlegel
H.G.
(
1964
)
Sulphur metabolism in Thiorhodaceae, I. Quantitative measurements on growing cells of Chromatium okenii
Antonie van Leeuwenhoek
 ,
30
,
225
238
.
[30]
Methods of Seawater Analysis
 
1976
Grasshoff
K.
, Ed)
Verlag Chemie
,
Weinheim
.
[31]
Stal
L.J.
Krumbein
W.E.
(
1981
)
Aerobic nitrogen fixation in pure cultures of a benthic marine Oscillatoria (cyanobacteria)
FEMS Microbiol. Lett.
 ,
11
,
295
298
.
[32]
Hoffmann
C.
(
1949
)
Über die Durchlässigkeit dünner Sandschichten für Licht
Planta
 ,
37
,
48
56
.
[33]
Pentecost
A.
(
1984
)
Effects of sedimentation and light intensity on mat-forming Oscillatoriaceae with particular reference to Microcoleus lyngbyaceus Gomont
J. Gen. Microbiol.
 ,
130
,
983
990
.
[34]
Schubert
W.
Giani
D.
Rongen
P.
Krumbein
W.E.
Schmidt
W.
(
1980
)
Photoacoustic in vivo spectra of recent stromatolites
Naturwissenschaften
 ,
67
,
129
132
.
[35]
Van Gemerden
H.
(
1980
)
Survival of Chromatium vinosum at low light intensities
Arch. Microbiol.
 ,
125
,
115
121
.
[36]
Cohen
Y.
Padan
E.
Shilo
M.
(
1975
)
Facultative anoxygenic photosynthesis in the cyanobacterium Oscillatoria limnetica
J. Bacteriol.
 ,
123
,
855
861
.
[37]
Javor
B.J.
Castenholz
R.W.
(
1984
)
Productivity studies of microbial mats, Laguna Guerrero Negro, Mexico
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
149
170
Alan R. Liss
,
New York
.
[38]
Van Baalen
C.
(
1962
)
Studies on marine blue-green algae
Botanica Marina
 ,
4
,
129
139
.
[39]
Potts
M.
Krumbein
W.E.
Metzger
J.
(
1978
)
Nitrogen fixation rates in anaerobic sediments determined by acetylene reduction, a new 15N field assay, and simultaneous total N15N determination
(
Krumbein
W.E.
, Ed) In
Environmental Biogeochemistry and Geomicrobiology, Vol. 3: Methods, Metals and Assessment
 , pp
753
769
Ann Arbor Science
,
Ann Arbor, MI
.
[40]
Stolz
J.
(
1984
)
Fine structure of the stratified microbial community at Laguna Figueroa, Baja California, Mexico, II. Transmission electron microscopy as a diagnostic tool in studying microbial communities in situ
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
23
38
Alan R. Liss
,
New York
.
[41]
Montesinos
E.
Guerrero
R.
Abella
C.
Esteve
I.
(
1983
)
Ecology and physiology of the competition for light between Chlorobium limicola and Chlorobium phaeobacteroides in natural habitats
Appl. Environ. Microbiol.
 ,
46
,
1007
1016
.
[42]
Kämpf
C.
Pfennig
N.
(
1980
)
Capacity of Chromatiaceae for chemotrophic growth. Specific respiration rates of Thiocystis violacea and Chromatium vinosum
Arch. Microbiol.
 ,
127
,
125
135
.
[43]
Nultsch
W.
Schuchart
H.
Koenig
F.
(
1983
)
Effects of sodium azide on phototaxis of the blue-green alga Anabaena variabilis and consequences to the two-photoreceptor systems-hypothesis
Arch. Microbiol.
 ,
134
,
33
37
.
[44]
Howsley
R.
Pearson
H.W.
(
1979
)
pH-Dependent sulphide toxicity to oxygenic photosynthesis in cyanobacteria
FEMS Microbiol. Lett.
 ,
6
,
287
292
.
[45]
Van Niel
C.B.
(
1931
)
On the morphology and physiology of the purple and sulphur bacteria
Arch. Mikrobiol.
 ,
3
,
1
112
.
[46]
Oren
A.
Shilo
M.
(
1979
)
Anaerobic heterotrophic dark metabolism in the cyanobacterium Oscillatoria limnetica: sulfur respiration and lactate fermentation
Arch. Microbiol.
 ,
122
,
77
84
.
[47]
Stal
L.J.
Krumbein
W.E.
(
1985
)
Metabolism of cyanobacteria in anaerobic marine sediments
 , in press Proc. 2nd Int. Colloquium Mar. Bact..
[48]
Howarth
R.W.
Merkel
S.
(
1984
)
Pyrite formation and the measurement of sulfate reduction in salt marsh sediments
Limnol. Oceanogr.
 ,
29
,
598
608
.
[49]
Howarth
R.W.
Marino
R.
(
1984
)
Sulfate reduction in salt marshes, with some comparisons to sulfate reduction in microbial mats
In
Microbial Mats: Stromatolites
 
Cohen
Y.
Castenholz
R.W.
Halvorson
H.O.
, Eds) pp
245
263
Alan R. Liss
,
New York
.
[50]
Garlick
S.
Oren
A.
Padan
E.
(
1977
)
Occurrence of facultative anoxygenic photosynthesis among filamentous and unicellular cyanobacteria
J. Bacteriol.
 ,
129
,
623
629
.
[51]
Nelson
D.C.
Jannasch
H.W.
(
1983
)
Chemoautotrophic growth of a marine Beggiatoa in sulfide-gradient cultures
Arch. Microbiol.
 ,
136
,
262
269
.
[52]
Jørgensen
B.B.
Revsbech
N.P.
Blackburn
T.H.
Cohen
Y.
(
1979
)
Diurnal cycle of oxygen and sulfide microgradients and microbial photosynthesis in a cyanobacterial mat sediment
Appl. Environ. Microbiol.
 ,
38
,
46
58
.