. Carbon and the biosphere; proceedings of the 24th Brookhaven symposium in biology, Upton, , May 16-18, 1972. Carbon cycle (Biogeochemistry). 252 WETZEL AND RICH. Submersed macrophytes and attached algae Emergent macrophytes and eulittoral algae INCREASING FERTILITY Fig. 3 Generalized relative contributions of phytoplankton, chemosynthetic dark C02 fixation, and allochthonous sources of dissolved organic carbon (DOC) to lakes of increasing fertility in the progression of dominating pelagic and littoral flora (see Fig. 2). TABLE 4 CHEMOSYNTHETIC RATES OF DARK C02 FIXATION IN THE PELAGIC ZO
. Carbon and the biosphere; proceedings of the 24th Brookhaven symposium in biology, Upton, , May 16-18, 1972. Carbon cycle (Biogeochemistry). 252 WETZEL AND RICH. Submersed macrophytes and attached algae Emergent macrophytes and eulittoral algae INCREASING FERTILITY Fig. 3 Generalized relative contributions of phytoplankton, chemosynthetic dark C02 fixation, and allochthonous sources of dissolved organic carbon (DOC) to lakes of increasing fertility in the progression of dominating pelagic and littoral flora (see Fig. 2). TABLE 4 CHEMOSYNTHETIC RATES OF DARK C02 FIXATION IN THE PELAGIC ZONE OF LAWRENCE LAKE, MICH. % of light gc m-2 year ! Mean mg C m-2 day"1 COj fixation 1968 1969 1970 1971 Average through the DOC pool annually. This percentage likely decreases as systems become more eutrophic, particularly where littoral metabolism becomes dominant. POC suspended in the water column of Lawrence Lake followed a conspicuously consistent pattern both seasonally (see Wetzel, Rich, Miller, and Allen, 1972) and from year to year (Table 5). Fluctuations in the POC pool closely paralleled those of phytoplankton primary productivity. A gradual. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Brookhaven National Laboratory; Woodwell, G. M; Pecan, Erene V. [Washington] Technical Information Center, U. S. Atomic Energy Commission; [available from National Technical Information Service, Springfield, Va. ]
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