In situ dissolved organic carbon (DOC) release by submerged macrophyte–epiphyte communities in southern Quebec lakes
- 1 September 2009
- journal article
- Published by Canadian Science Publishing in Canadian Journal of Fisheries and Aquatic Sciences
- Vol. 66 (9), 1522-1531
- https://doi.org/10.1139/f09-099
Abstract
We studied the in situ release of dissolved organic carbon (DOC) by growing a submerged freshwater macrophyte–epiphyte complex. Incubations with benthic chambers in five southeastern Quebec lakes show a net DOC production for different communities of Myriophyllum spicatum and Potamogeton spp. Daytime DOC release rates range from undetectable to 9.7 mg C·m–2·h–1. Although DOC release was restricted to daylight hours and thus suggestive of a photosynthesis-related process, we found no strong link between DOC release rates and concurrent illumination or temperature. We found no difference in DOC release rates between the three main colonizing species of the studied region. The overall mean DOC release rate was 4.57 mg C·m–2·h–1(standard deviation (SD), ±0.65) or 56 µg C·g dry weight–1·h–1(SD, ±8), which we suggest can be used for extrapolations at the lake scale.Keywords
This publication has 44 references indexed in Scilit:
- Photosynthesis in the aquatic environmentPublished by Cambridge University Press (CUP) ,2010
- Phytoplankton trapped within seagrass (Posidonia oceanica) sediments are a nitrogen source: An in situ isotope labeling experimentLimnology and Oceanography, 2006
- Bacterial Growth on Allochthonous Carbon in Humic and Nutrient-enriched Lakes: Results from Whole-Lake 13C Addition ExperimentsEcosystems, 2006
- Prevalence of Heterotrophy and Atmospheric CO2 Emissions from Aquatic EcosystemsEcosystems, 2005
- Continuity in the photosynthetic production of dissolved organic carbon from eutrophic to oligotrophic watersMarine Ecology Progress Series, 2005
- Significance and mechanisms of photosynthetic production of dissolved organic carbonin a coastal eutrophic ecosystemLimnology and Oceanography, 2004
- High Organic Carbon Export Precludes Eutrophication Responses in Experimental Rocky Shore CommunitiesEcosystems, 2003
- Growth, photosynthesis, and extracellular organic release in colonized and axenic Myriophyllum spicatumCanadian Journal of Botany, 1989
- Release of dissolved organic matter by autolysis of a submersed macrophyte, Scirpus subterminalis1Limnology and Oceanography, 1974
- RELEASE OF DISSOLVED ORGANIC MATTER BY MARINE SEAWEEDS AND DISTRIBUTION OF THEIR TOTAL ORGANIC PRODUCTION TO INSHORE COMMUNITIES1Limnology and Oceanography, 1969