Whole‐lake estimates of carbon flux through algae and bacteria in benthic and pelagic habitats of clear‐water lakes

• DOI: 10.1890/07-1855.1
• Publication Date: 2009-07-07T18:47:08Z
• Authors: Jenny Ask; Jan Karlsson; Lennart Persson; Per Ask; Pär Byström; Mats Jansson
• Keywords: Geologic Sediments; Eukaryota; Fresh Water; 15. Life on land; 01 natural sciences; 7. Clean energy; Carbon; 13. Climate action; 14. Life underwater; Water Microbiology; Ecosystem; 0105 earth and related environmental sciences

This study quantified new biomass production of algae and bacteria in both benthic pelagic habitats clear‐water lakes to contrast how carbon from the atmosphere terrestrial sources regulates whole‐lake metabolism. We studied four small unproductive subarctic northern Sweden during one summer season. The was calculated as sum autotrophic by heterotrophic using allochthonous organic (OC). Whole‐lake dominated habitat (86% ± 4% [mean SD]) primary (77% 9%). Still, fueled OC constituted a significant portion (19% 11%) (51% 24%). In addition, overall net (primary minus respiration) close zero but highly negative (−163 81 mg C·m −2 ·d −1 ) regions all lakes. conclude (1) that supported part total habitats, (2) biomass, (3) respiration CO 2 flux flux. Taken together, these findings suggest previous investigations have greatly underestimated productivity when metabolism not been measured.