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We therefore studied quantitatively, the seasonal dynamics of matter deposition and mobilisation inside and outside (free path) a representative patch of arrowhead, <jats:italic>Sagittaria sagittifolia<\/jats:italic>, in the lowland River Spree, NE Germany, in August 2006. Our <jats:italic>in situ<\/jats:italic> study combined resuspension experiments, a hydrodynamically calibrated erosion chamber and concurrent measurements of the prevailing flow characteristics and bed load.<\/jats:p><jats:p>2.\u2002Increasing entrainment rates (<jats:italic>E<\/jats:italic>) of particles (<jats:italic>E<\/jats:italic><jats:sub>SPM<\/jats:sub>) and total P (<jats:italic>E<\/jats:italic><jats:sub>TP<\/jats:sub>), with increments of shear velocity (<jats:italic>U<\/jats:italic><jats:sub>*<\/jats:sub>) from 0.53 to 2.42\u2003cm\u2003s<jats:sup>\u22121<\/jats:sup>, were significantly higher inside the plant patch than outside. Indeed, <jats:italic>E<\/jats:italic><jats:sub>SPM<\/jats:sub> and <jats:italic>E<\/jats:italic><jats:sub>TP<\/jats:sub> at the lowest <jats:italic>U<\/jats:italic><jats:sub>*<\/jats:sub> were 8\u2010 and 12\u2010fold higher inside than outside the patch, reflecting the resuspension potential of the upper nutrient\u2010enriched layer and the extent of pulsed P inputs even at small increases in <jats:italic>U<\/jats:italic><jats:sub>*<\/jats:sub>.<\/jats:p><jats:p>3.\u2002Vertical distribution of velocity (<jats:italic>u<\/jats:italic>) revealed a flow pattern of a mixing layer inside the <jats:italic>S. sagittifolia<\/jats:italic> patch, and that of a boundary layer in the free path. The highest gradient of <jats:italic>u<\/jats:italic> in the mixing layer was located in the water column at about 0.5\u2003m depth, whereas the highest gradient of <jats:italic>u<\/jats:italic> for the boundary layer was found near the riverbed. The maximum of <jats:italic>U<\/jats:italic><jats:sub>*<\/jats:sub> (1.65\u2003cm\u2003s<jats:sup>\u22121<\/jats:sup>) was only 4\u2003mm above the sediment.<\/jats:p><jats:p>4.\u2002A plant mosaic provides a low\u2010energetic environment promoting extensive particle trapping and the accumulation of a fine\u2010grained, nutrient\u2010enriched sediment, and forming a large resuspension potential. Consequently, after plant decay and the concomitant increase of <jats:italic>U<\/jats:italic><jats:sub>*<\/jats:sub> this material is preferentially entrained at higher rates. Hence, the key role of submerged macrophytes in lowland rivers is more directly related to modifying the dynamic equilibria between vegetation trapping and resuspension, than to the retention of nutrients, particularly P, and the reduction of P loads downstream to other waters.<\/jats:p>","DOI":"10.1111\/j.1365-2427.2009.02277.x","type":"journal-article","created":{"date-parts":[[2009,8,7]],"date-time":"2009-08-07T06:55:07Z","timestamp":1249628107000},"page":"326-345","source":"Crossref","is-referenced-by-count":83,"title":["Effects of aquatic macrophytes on organic matter deposition, resuspension and phosphorus entrainment in a lowland river"],"prefix":"10.1111","volume":"55","author":[{"given":"ANDREAS","family":"KLEEBERG","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"JAN","family":"K\u00d6HLER","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"TATIANA","family":"SUKHODOLOVA","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"ALEXANDER","family":"SUKHODOLOV","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2010,1,13]]},"reference":[{"key":"e_1_2_6_2_1","doi-asserted-by":"publisher","DOI":"10.1029\/JC088iC14p09661"},{"key":"e_1_2_6_3_1","doi-asserted-by":"publisher","DOI":"10.1007\/BF00006012"},{"key":"e_1_2_6_4_1","doi-asserted-by":"publisher","DOI":"10.4319\/lo.1998.43.7.1500"},{"key":"e_1_2_6_5_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0924-7963(96)00129-7"},{"key":"e_1_2_6_6_1","doi-asserted-by":"publisher","DOI":"10.1002\/hyp.1412"},{"key":"e_1_2_6_7_1","doi-asserted-by":"publisher","DOI":"10.2307\/2255874"},{"key":"e_1_2_6_8_1","doi-asserted-by":"publisher","DOI":"10.1080\/02705060.1988.9665177"},{"key":"e_1_2_6_9_1","first-page":"143","volume-title":"Proceedings of the European Weed Research Society (EWRS)","author":"Dawson F.H.","year":"1978"},{"key":"e_1_2_6_10_1","first-page":"1429","article-title":"The concept of species succession in relation to river vegetation and management","volume":"20","author":"Dawson F.H.","year":"1978","journal-title":"Verhandlungen der internationalen Vereinigung f\u00fcr Limnologie"},{"key":"e_1_2_6_11_1","first-page":"437","volume-title":"Modelling Soil Erosion, Sediment Transport and Closely Related Hydrological Processes","author":"Droppo I.G.","year":"1998"},{"key":"e_1_2_6_12_1","doi-asserted-by":"publisher","DOI":"10.1016\/j.ecss.2004.02.006"},{"key":"e_1_2_6_13_1","doi-asserted-by":"publisher","DOI":"10.1111\/j.1365-2427.2004.01183.x"},{"key":"e_1_2_6_14_1","first-page":"344","volume-title":"Sediment Dynamics and Pollutant Mobility in Rivers \u2013 An Interdisciplinary Approach","author":"Flemming H.\u2010C.","year":"2007"},{"key":"e_1_2_6_15_1","doi-asserted-by":"publisher","DOI":"10.1016\/S0272-7714(05)80039-3"},{"key":"e_1_2_6_16_1","doi-asserted-by":"publisher","DOI":"10.1016\/0016-7037(96)00086-5"},{"key":"e_1_2_6_17_1","doi-asserted-by":"publisher","DOI":"10.1016\/0012-821X(83)90140-1"},{"key":"e_1_2_6_18_1","doi-asserted-by":"publisher","DOI":"10.1029\/2001JC000871"},{"key":"e_1_2_6_19_1","volume-title":"Biologische und morphologische Untersuchungen \u00fcber Wasser\u2010 und Sumpfgew\u00e4chse. 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