BGD Biogeosciences Discussions BGD 1810-6285 Copernicus GmbH Göttingen, Germany 10.5194/bgd-9-8733-2012 Nutrient dynamics, transfer and retention along the aquatic continuum from land to ocean: towards integration of ecological and biogeochemical models Bouwman A. F. 1 2 Bierkens M. F. P. 3 5 Griffioen J. 4 5 Hefting M. M. 6 Middelburg J. J. 2 Middelkoop H. 7 Slomp C. P. 2 PBL Netherlands Environmental Assessment Agency, P.O. Box 303, 3720 AH Bilthoven, The Netherlands Department of Earth Sciences – Geochemistry, Faculty of Geosciences, Utrecht University, P.O. Box 80021, 3508 TA Utrecht, The Netherlands Department of Landscape Ecology, Geo-Information and Hydrology, Faculty of Geosciences, Utrecht University, P.O. Box 80.115, 3508 TC Utrecht, The Netherlands Department of Innovation, Environmental and Energy Sciences – Faculty of Geosciences, Utrecht University, P.O. Box 80115, 3508 TA Utrecht, The Netherlands Deltares, P.O. Box 85467, 3508 AL Utrecht, The Netherlands Ecology and Biodiversity, Department of Biology, Faculty of Natural Sciences, Utrecht University, P.O. Box 800.84, 3508 TB Utrecht, The Netherlands Department of Physical Geography – Faculty of Geosciences, Utrecht University, P.O. Box 80115, 3508 TC Utrecht, The Netherlands 19 07 2012 9 7 8733 8782 This is an open-access article ditributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. This article is available from http://www.biogeosciences-discuss.net/9/8733/2012/bgd-9-8733-2012.html The full text article is available as a PDF file from http://www.biogeosciences-discuss.net/9/8733/2012/bgd-9-8733-2012.pdf

In river basins, soils, groundwater, riparian zones, streams, rivers, lakes and reservoirs act as successive filters in which the hydrology, ecology and biogeochemical processing are strongly coupled and together act to retain a significant fraction of the nutrients transported. This paper compares existing river ecology concepts with current approaches to describe river biogeochemistry, and assesses the value of these concepts and approaches for understanding the impacts of interacting global change disturbances on river biogeochemistry. Through merging perspectives, concepts, modeling techniques, we propose integrated model approaches that encompass both aquatic and terrestrial components in heterogeneous landscapes. In this model framework, existing ecological and biogeochemistry concepts are extended with a balanced approach for assessing nutrient and sediment delivery on the one hand, and nutrient in-stream retention on the other hand.

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