Inorganic nutrient acquisition in a shallow clearwater lake: dominance of benthic microbiota
2006 (English)In: Aquatic Sciences, ISSN 1015-1621, E-ISSN 1420-9055, Vol. 68, no 2, 172-180 p.Article in journal (Refereed) Published
This mesocosm study from the oligotrophic Lake Eckarfjärden in Sweden shows, in contrast to many previous studies, that benthic microbiota dominated production following elevated nutrient concentrations in the water. Increased nutrient concentrations favoured microphytobenthos, whereas phytoplankton biomass remained roughly the same. Microphytobenthos biomass and production were clearly stimulated by nitrogen addition, while phytoplankton showed signs of phosphorus limitation. There were tight interactions between pelagic and benthic habitats and between organisms, and pelagic as well as benthic heterotrophic bacteria were disfavoured when microphytobenthos had access to nitrogen.
We conclude that increased nutrient concentrations in the water column may trigger immediate responses in both habitats, altering the tight interactions between microbiota, but not necessarily resulting in a shift towards pelagic production.
Place, publisher, year, edition, pages
2006. Vol. 68, no 2, 172-180 p.
IdentifiersURN: urn:nbn:se:uu:diva-93056DOI: 10.1007/s00027-006-0805-xOAI: oai:DiVA.org:uu-93056DiVA: diva2:166416