Significance of pelagic and benthic metabolism for the carbon budget of a shallow lake
| Autor: | Magdalena Wielgat-Rychert, Krzysztof Rychert |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
geography geography.geographical_feature_category 010504 meteorology & atmospheric sciences 010604 marine biology & hydrobiology Lake ecosystem Pelagic zone Aquatic Science 01 natural sciences Sink (geography) Carbon cycle Oceanography Benthic zone Littoral zone Environmental science Autotroph Limnetic zone 0105 earth and related environmental sciences |
| Zdroj: | Annales de Limnologie - International Journal of Limnology. 53:101-110 |
| ISSN: | 2100-000X 0003-4088 |
| Popis: | Pelagic and benthic primary production and respiration were measured at an offshore station in the shallow, 1.2 m deep, polymictic Lake Gardno (Poland) to examine the role of the pelagic zone and the sediments in the overall carbon budget of this lake. The respiration rates in the sediments were within the same range of values as those in the pelagic zone. The results indicate that although the pelagic zone of the lake was net autotrophic (P:R = 2.46) based on annual cycles, total primary production to respiration (pelagic zone + sediments) was balanced, and the P:R ratio was 1.18. Thus, potentially only a small part of pelagic primary production is exported and buried in the sediments. The whole lake ecosystem does not act as an effective atmospheric CO2 sink. The balanced primary production to respiration ratio in the open water zone of the lake indicated that littoral production was most probably decomposed or buried within the littoral zone. |
| Databáze: | OpenAIRE |
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