Lake trophic status can be determined by the depth distribution of sediment phosphorus
2011 (English)In: Limnology and Oceanography, ISSN 0024-3590, Vol. 56, no 6, 2051-2063 p.Article, review/survey (Refereed) Published
In this meta-analysis, we examine how sediment phosphorus (P) burial pattern may be related to trophic state. We present sediment P profiles from 94 lakes that demonstrate fundamental differences in P burial between oligotrophic and eutrophic systems. In sediments of eutrophic (>= 30 mu g water column total P (TP) L-1) lakes, P concentrations are elevated in the surficial sediments in comparison with deeper layers, representing a large P pool that can be recycled. This pattern directly contrasts with sediment P profiles in oligotrophic lakes (< 10 mu g water column TP L-1), which exhibit increasing concentrations of permanently buried P with depth. Sediment processes regulating P burial may be important regulators of internal P recycling and consequently lake trophic status. Thus, mesotrophic lakes (10 to 30 mu g water column TP L-1), which exhibit consistent P concentrations with depth, are more vulnerable to external P inputs than oligotrophic lakes because they are at their maximal sediment P burial flux. Our data suggest that thresholds in sediment P pattern may correlate with thresholds in sediment P burial processes and consequently may indicate whether deposited P will be released to the water column.
Place, publisher, year, edition, pages
2011. Vol. 56, no 6, 2051-2063 p.
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:uu:diva-169326DOI: 10.4319/lo.2011.56.6.2051ISI: 000299349700008OAI: oai:DiVA.org:uu-169326DiVA: diva2:506196