Remains of Bosmina in sediments reflects historical changes in fish populations in a northern Swedish lake
(English)Manuscript (preprint) (Other academic)
Based on morphological measurements on Bosmina in a sediment core from a boreal lake we estimated 60 years back in time historical changes in Planktivore Community Capacity (PCC), a recent derived approach to estimate past planktivore pressure in lakes. We then validated the PCC approach with available information on changes in the lake fish community based on historical knowledge and more recent fish population studies in the lake. Based on available data on fish density, size structure and size dependent attack rate functions on zooplankton we calculated a measure of planktivore pressure in the lake, the Planktivore Population Capacity (PPC). The reconstructed PCC development over the time from Bosmina remains in the sediment core correlated well with PPC estimates (r2 = 0.89 p<0.05) as well as qualitatively with historical information on the development of fish community in the lake. The results from our study suggest that the derived PCC function based on morphological measurements on Bosmina remains in sediments can successfully be used to track historical changes in planktivore communities in lakes.
Research subject Limnology
IdentifiersURN: urn:nbn:se:umu:diva-53559OAI: oai:DiVA.org:umu-53559DiVA: diva2:513444