Variation in riverine phosphorus between 1994 and 2003 as affected by land-use and loading reductions in six medium-sized to large German rivers

DC FieldValueLanguage
dc.contributor.authorSchulz, Marcus
dc.contributor.authorBischoff, Maik
dc.date.accessioned2021-12-23T15:57:12Z-
dc.date.available2021-12-23T15:57:12Z-
dc.date.issued2008
dc.identifier.issn00759511
dc.identifier.urihttps://osnascholar.ub.uni-osnabrueck.de/handle/unios/2783-
dc.description.abstractLand use and in-stream transformation exert great influence on concentrations and loads of phosphorus (P) in rivers. We aimed to display differences in the courses of total P (TP) and soluble reactive P (SRP) concentrations and loads in six medium-sized to large rivers in the central region of Germany, and to identify the reasons for different long-term trends. Therefore, we applied multivariate statistics to 10-year-time series (1994-2003) of TP, SRP, discharge (Q), water temperature (T), pH, dissolved organic carbon (DOC), total organic carbon (TOC), dissolved oxygen (DO), total iron (Fe), and total manganese (Mn). Statistical results were related to land use in the catchments of the rivers. TP concentrations ranged between 0.02 and 0.78 mg l(-1), and SRP concentrations ranged between 0.01 and 0.44 mg l(-1). Q correlated negatively with TP and SRP concentrations over the entire year. Furthermore, Fe correlated significantly and positively to TP and SRP and therefore, ferric hydroxides likely were the major P sorption sites. DOC showed significant positive correlation to SRP particularly in spring, indicating manure exposure in early spring as a major source of both, DOC and SRP. Significant negative correlations between DO and SRP in summer hint at internal P loading in rivers or in flushed lakes. Different forms of land use were the reasons of enhanced or retarded recovering from previous increases in P concentrations. High portions of arable land within some of the catchments impeded the process of decreases since 1996 because of remaining high-diffuse emissions from fertilized soils. Agricultural practices, exposing fertilizer to soils within the river catchments and high Q in early spring caused high TP and SRP loads to downstream systems, and evoked risks for downstream river reaches. (C) 2007 Elsevier GmbH. All rights reserved.
dc.language.isoen
dc.publisherELSEVIER GMBH
dc.relation.ispartofLIMNOLOGICA
dc.subjectcatchment characteristics
dc.subjectDYNAMICS
dc.subjectemissions
dc.subjectimissions
dc.subjectLimnology
dc.subjectLOWLAND RIVER
dc.subjectMACROPHYTES
dc.subjectMarine & Freshwater Biology
dc.subjectMODEL
dc.subjectmultivariate statistics
dc.subjectORGANIC-MATTER
dc.subjectphosphorus
dc.subjectRETENTION
dc.subjectSEDIMENT
dc.subjectSPREE
dc.subjectSYSTEM
dc.subjectWATERS
dc.titleVariation in riverine phosphorus between 1994 and 2003 as affected by land-use and loading reductions in six medium-sized to large German rivers
dc.typejournal article
dc.identifier.doi10.1016/j.limno.2007.10.002
dc.identifier.isiISI:000256407600004
dc.description.volume38
dc.description.issue2
dc.description.startpage126
dc.description.endpage138
dc.identifier.eissn18735851
dc.publisher.placeHACKERBRUCKE 6, 80335 MUNICH, GERMANY
dcterms.isPartOf.abbreviationLimnologica
dcterms.oaStatusBronze
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