title: Terrestrial organic matter input suppresses biomass production in lake ecosystems.
abstract: Terrestrial ecosystems export large amounts of organic carbon (t-OC) but the net effect of this OC on the productivity of recipient aquatic ecosystems is largely unknown. In this study of boreal lakes, we show that the relative contribution of t-OC to individual top consumer (fish) biomass production, and to most of their potential prey organisms, increased with the concentration of dissolved organic carbon (DOC; dominated by t-OC sources) in water. However, the biomass and production of top consumers decreased with increasing concentration of DOC, despite their substantial use (up to 60%) of t-OC. Thus, the results suggest that although t-OC supports individual consumer growth in lakes to a large extent, t-OC input suppresses rather than subsidizes population biomass production.
authors.forename: Jan
authors.initials: J
authors.lastname: Karlsson
authors.forename: Ann-Kristin
authors.initials: AK
authors.lastname: Bergström
authors.forename: Par
authors.initials: P
authors.lastname: Byström
authors.forename: Cristian
authors.initials: C
authors.lastname: Gudasz
authors.forename: Patricia
authors.initials: P
authors.lastname: Rodríguez
authors.forename: Catherine
authors.initials: C
authors.lastname: Hein
mesh_terms: D000818:Animals; D018533:Biomass; D002244:Carbon / Q000737:chemistry / Q000378:metabolism; D017753:Ecosystem; D005399:Fishes / Q000502:physiology*; D060106:Lakes; D015048:Zooplankton / Q000502:physiology*
chemical_list: D002244:Carbon