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Data-driven Nutrient-landscape Relationships across Regions and Scales
Stockholm University, Faculty of Science, Department of Physical Geography.
Stockholm University, Faculty of Science, Department of Physical Geography. Stockholm University, Faculty of Science, Stockholm University Baltic Sea Centre.
Stockholm University, Faculty of Science, Department of Physical Geography.
Number of Authors: 3
2016 (English)In: Water environment research, ISSN 1061-4303, E-ISSN 1554-7531, Vol. 88, no 11, 2023-2031 p.Article in journal (Refereed) Published
Abstract [en]

Previous studies have identified relationships between nutrient exports and upstream conditions, but have often disconnected interpretations from hydrological flows and changes. Here, we investigated basic relationships between largely flow-independent nutrient concentrations and two key descriptors of upstream landscape and human activity: population density and arable land cover. Consistent data were gathered from previous studies of the Baltic Sea and Mississippi River basins. These data span wide ranges of subcatchment scales, hydroclimatic conditions, and landscape characteristics. In general, investigated relationships were stronger in the Baltic than in the Mississippi region and stronger for total nitrogen (TN) than total phosphorous (TP) concentrations. However, TN concentration was both highly and consistently correlated to arable land cover across all scales and both regions. These findings support that TN export from catchments is dictated principally by retention and slow release from subsurface legacy stores while export TP concentrations appear to be dictated more by faster particulate surface transport.

Place, publisher, year, edition, pages
2016. Vol. 88, no 11, 2023-2031 p.
Keyword [en]
Nutrients, population, arable land, agriculture, Baltic, Mississippi
National Category
Environmental Engineering Earth and Related Environmental Sciences Biological Sciences
Identifiers
URN: urn:nbn:se:su:diva-140277DOI: 10.2175/106143016X14504669768255ISI: 000393312900007OAI: oai:DiVA.org:su-140277DiVA: diva2:1081807
Available from: 2017-03-15 Created: 2017-03-15 Last updated: 2017-11-29Bibliographically approved

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Lyon, Steve W.Destouni, Georgia
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