Showing papers by "Lars J. Tranvik published in 2004"
TL;DR: In this paper, regional and global lake methane emissions, contributing to the greenhouse effect, are poorly known, and the authors develop a method to identify hot spots of methane production in the landscape.
Abstract: [ 1] Lake sediments are "hot spots'' of methane production in the landscape. However, regional and global lake methane emissions, contributing to the greenhouse effect, are poorly known. We develop ...
902 citations
TL;DR: In this paper, the authors calculated the carbon loss (mineralization plus sedimentation) and net CO2 escape to the atmosphere for 79,536 lakes and total running water in 21 major Scandinavian catchments.
Abstract: We calculated the carbon loss (mineralization plus sedimentation) and net CO2 escape to the atmosphere for 79 536 lakes and total running water in 21 major Scandinavian catchments (size range 437–4 ...
351 citations
TL;DR: Under the conditions used in this study, ergosterol was very stable both when added as a pure compound and when associated with dead fungi, and should be used cautiously as a biomarker for living fungi.
199 citations
TL;DR: In this paper, using both organic matter (OM) and carbon dioxide (CO 2 ) taken from a humic lake, a laboratory study was conducted using both OM and CO 2 samples.
Abstract: Decades of conflicting results have fueled a debate about how O-2 affects organic matter (OM) degradation and carbon cycling. In a laboratory study, using both OM taken directly from a humic lake a ...
148 citations
TL;DR: The particulate content of samples of the surface microlayer water collected from the open water between ice floes at latitudes 88° to 89°N in August 2001 was examined by transmission electron microscopy as discussed by the authors.
98 citations
TL;DR: In this article, seasonal variation of pCO2 and primary and bacterioplankton production were measured in the Gulf of Bothnia during an annual cycle Surface water was supersaturated with CO2 on an annual basis.
Abstract: Seasonal variation of pCO2 and primary and bacterioplankton production were measured in the Gulf of Bothnia during an annual cycle Surface water was supersaturated with CO2 on an annual basis, ind
47 citations
TL;DR: Carbon dioxide in Swedish hydroelectric reservoirs and natural lakes was studied to assess whether the emission of CO2 from inland waters has increased due to construction of reservoirs, and to gauge the level of pollution in the reservoir system.
Abstract: Carbon dioxide in Swedish hydroelectric reservoirs and natural lakes was studied to assess whether the emission of CO2 from inland waters has increased due to construction of reservoirs, and to gau ...
18 citations
TL;DR: This work investigated temporal changes in community composition of bacteria growing on riverine dissolved organic carbon using batch cultures adjusted to riverine or estuarine salinity levels and inocula levels to study the effects of salinity and carbon dioxide levels on community composition.
Abstract: We investigated temporal changes in community composition of bacteria growing on riverine dissolved organic carbon. Batch cultures were adjusted to riverine or estuarine salinity levels and inocula ...
16 citations
TL;DR: The 9th meeting of the Nordic Chapter of the International Humic Substances Society held at Mid Sweden University, Sundsvall, Sweden, May 19-21, 2003 as discussed by the authors focused on speciation of organic matter and its functions in nature and had themes ranging from analytical techniques to interpretation of ecosystem functions.
Abstract: This special issue of Aquatic Sciences is the result of contributions in the field of aquatic science to the 9th meeting of the Nordic Chapter of the International Humic Substances Society held at Mid Sweden University, Sundsvall, Sweden, May 19-21, 2003. The conference focused on speciation of organic matter and its functions in nature and had themes ranging from analytical techniques to interpretation of ecosystem functions: 1. Characterization and identification of natural organic matter 2. Abundance and functions of organic matter species in terrestrial systems 3. Abundance and functions of organic matter species in aquatic systems 4. Natural organic matter in relation to climate change 5. Interaction of organic matter with heavy metals and xenobiotics
2 citations