Different carbon support for community respiration and secondary production in unproductive lakes
2007 (English)In: Oikos, ISSN 0030-1299, E-ISSN 1600-0706, Vol. 116, no 10, 1691-1696 p.Article in journal (Refereed) Published
This study investigates the allocation of allochthonous organic carbon (AlloOC) to pelagic respiration and biomass production in unproductive lakes. Metabolic process rates and stable isotopic composition (delta C-13) of crustacean zooplankton and respired CO2 were measured in the epilimnion of 13 forest lakes in northern Sweden. The delta C-13 of zooplankton was low (-31.2 to -38.0 parts per thousand) compared to that of respired CO2 (-28.4 to -30.6 parts per thousand), implying that the relative importance of AlloOC was lower for zooplankton (ca 40%) than for respiration (ca 80%). Combining delta C-13 and carbon flux data revealed that a large amount of metabolized AlloOC was lost in respiration, compared to the amount transferred to zooplankton (< 3%). Thus, despite large respiratory losses, AlloOC was still important for zooplankton growth, implying a high supply of AlloOC in comparison to phytoplankton generated organic carbon in the lakes.
Place, publisher, year, edition, pages
Oxford: Blackwell Publishing, 2007. Vol. 116, no 10, 1691-1696 p.
dissolved organic carbon, stable-isotope analysis, food webs, phytoplankton production, bacterial metabolism, growth efficiency, Northern Sweden, humic lakes, zooplankton, matter
Environmental Sciences Ecology
IdentifiersURN: urn:nbn:se:umu:diva-6201DOI: 10.1111/j.2007.0030-1299.15825.xISI: 000249493100010OAI: oai:DiVA.org:umu-6201DiVA: diva2:145869