160 Productivity and Benthic Organisms
pp
gC/m'y
. 200.50°0,..60
D 100'2000.'5.35
rn60 . ,OO L .. Jnocoy.,age
Fig. 6.3. Distribution of primary production (PP) in the world ocean, based on radiocarbon uptake
experiments. XPIOO= Export production, flux at 100 m waterdepth. [W. H. Berger 1992, Z . Deutsche
Geol. Ges. 142: 149-178.]
o < 025%
IllliiI 0 .25 - 05%
•
> 0 .5%
•
> 1%
Fig. 6.4. Di stribution of organic matter content in marine sediments: percent Corg dry weight. [W. H.
Berger, J. C. Herguera , in P. G. Falkowski , A. D. Woodhead (eds) 1992 , Primary productivity and
biochemical cycles in the sea. Plenum Press New York. Data mainly from E. A. Romankevich,
1983.]
between anaerobic sediment and organic carbon content in sediments, after burial , is
of special interest in this context (Fig. 6.5). The lack of correlation between sedimentation rate and Corg in anoxic conditions, and the good correlation in oxic conditions,
is evident when all available data from Neogene marine sediments are considered. It
pp
gC/m'y
. 200.50°0,..60
D 100'2000.'5.35
rn60 . ,OO L .. Jnocoy.,age
Fig. 6.3. Distribution of primary production (PP) in the world ocean, based on radiocarbon uptake
experiments. XPIOO= Export production, flux at 100 m waterdepth. [W. H. Berger 1992, Z . Deutsche
Geol. Ges. 142: 149-178.]
o < 025%
IllliiI 0 .25 - 05%
•
> 0 .5%
•
> 1%
Fig. 6.4. Di stribution of organic matter content in marine sediments: percent Corg dry weight. [W. H.
Berger, J. C. Herguera , in P. G. Falkowski , A. D. Woodhead (eds) 1992 , Primary productivity and
biochemical cycles in the sea. Plenum Press New York. Data mainly from E. A. Romankevich,
1983.]
between anaerobic sediment and organic carbon content in sediments, after burial , is
of special interest in this context (Fig. 6.5). The lack of correlation between sedimentation rate and Corg in anoxic conditions, and the good correlation in oxic conditions,
is evident when all available data from Neogene marine sediments are considered. It