UTILIZATION OF DISSOLVED ORGANIC CARBON BY NATURAL POPULATIONS OF EPIBENTHIC SALT MARSH DIATOMS1
| Autor: | W. Marshall Darley, Connie T. Ohlman, Barbara B. Wimpee |
|---|---|
| Rok vydání: | 1979 |
| Předmět: |
Differential centrifugation
geography geography.geographical_feature_category Heterotroph Substrate (chemistry) chemistry.chemical_element Plant Science Aquatic Science Biology biology.organism_classification chemistry.chemical_compound chemistry Algae Chlorophyll Environmental chemistry Salt marsh Dissolved organic carbon Botany Carbon |
| Zdroj: | Journal of Phycology. 15:1-5 |
| ISSN: | 0022-3646 |
| DOI: | 10.1111/j.1529-8817.1979.tb02952.x |
| Popis: | Natural populations of pennate diatoms collected from the mudflats of a Georgia salt marsh were cleansed by differential centrifugation and tested for their ability to assimilate and respire 14C-acetate, lactate and glucose at 1 μM concentrations. A correction was made for contaminating bacterial activity. Utilization rates were measured in the light and dark and in the presence of a second substrate. Mean incorporation rates were (in pmol ·μg chl a−1· h−1± SE): acetate, 117 ± 37; lactate, 53.7 ± 20.4; glucose 13.0 ± 5.8. Using a carbon/chlorophyll ratio of 53.2 and a generation time of 48 h we calculate these algae could obtain up to 1% of their carbon heterotrophically if several usable substrates were each available at 1 μM concentrations. |
| Databáze: | OpenAIRE |
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