Spatial and temporal changes in phosphorus partitioning within a freshwater cyanobacterial mat community

0350906 - BC 2011 RIV NL eng J - Journal Article
Borovec, Jakub - Sirová, D. - Mošnerová, Petra - Rejmánková, E. - Vrba, J.
Spatial and temporal changes in phosphorus partitioning within a freshwater cyanobacterial mat community.
Biogeochemistry. Roč. 101, 1-3 (2010), s. 323-333. ISSN 0168-2563. E-ISSN 1573-515X
R&D Projects: GA MZe(CZ) QH81012
Institutional research plan: CEZ:AV0Z60170517; CEZ:AV0Z60050516
Keywords : phosphorus partitioning * cyanobacterial mat * diurnal changes * sequential fractionation * EPS
Subject RIV: DA - Hydrology ; Limnology
Impact factor: 2.674, year: 2010

Spatial and temporal changes in phosphorus distribution, partitioning and mobility in the benthic cyanobacterial mat (CBM) were evaluated using sequential chemical fractionation. Total P (TP) content was extremely low, ranging from 0.025 to 0.1 mg g-1DW. Extracellular polymeric substances (EPS) appear to bind significant amounts of P (up to 52% of TP), followed by the autigenic apatites (up to 35% of TP). While mass balance calculations revealed virtually no exchange of P with the ambient environment, our results show that P is not a static nutrient, but that the partitioning of its forms and hence, presumably, its bioavailability, is dependent on spatial and temporal fluctuation of physico-chemical parameters, mainly pH, in most of the vertical profile.
Permanent Link: http://hdl.handle.net/11104/0190776