Daily production and consumption in an eelgrass (Zostera marina) community in saline Lake Grevelingen: discrepancies between the O2 and 14C method
Lindeboom, H.; De Bree, B.H.H. (1982). Daily production and consumption in an eelgrass (Zostera marina) community in saline Lake Grevelingen: discrepancies between the O2 and 14C method. Neth. J. Sea Res. 16: 362-379
In: Netherlands Journal of Sea Research. Netherlands Institute for Sea Research (NIOZ): Groningen; Den Burg. ISSN 0077-7579; e-ISSN 1873-1406, meer
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| Auteurs | | Top |
- Lindeboom, H., meer
- De Bree, B.H.H.
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| Abstract |
During seven 28-hour measurement periods in 1980 and 1981 the oxygen production and consumption in an eelgrass community in Lake Grevelingen were determined using light and dark plexiglass enclosures. Applying an oxygen to carbon conversion factor of 0.29 the amount of carbon fixed and the amount of organic carbon consumed were estimated. During the daylight period a net production was found, whereas over 24 hours a net production in spring and a net consumption later in the year were found. On an annual basis, production and consumption were approximately equal, with a net production occurring in the over-ground eelgrass community and a net consumption in the sediment. Close to the plexiglass enclosures samples were taken in order to measure primary production with the 14C method. Comparison of the results of the O2 and 14C methods showed that the first yielded considerably higher C fixation values ( 1.2 to 2.0 times for the production of Zostera marina and 2.7 to 5.4 times for that of the microphytobenthos). Production values assessed with the 14C method in comparison with the consumption values assessed with the O2 method were always much too low, and a carbon mass balance based on the two methods fails. |
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