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| 1 | An exploratory study on the use of enzyme activities as sediment tracers:biochemical fingerprints?显示文摘Little information exists on the potential of soil enzyme activities,which are sensitive to soil properties and management,for the characterization of sediment sources at the catchment scale.The objective of this study is to explore and evaluate enzyme activity as tracer for sediment fingerprinting in the Hiv catchment(55 km^2),Iran.Therefore,four enzymes were measured from 42 different sampling sites,covering three sediment source areas(rangeland/surface erosion,orchard/surface erosion,and streambank erosion),as well as from 12 sediment samples from reservoir check dams (sediment sinks).The results indicate that,based upon backward mode discriminant analysis,βglucosidase and dehydrogenase,allowed more than 95%of the samples to be correctly assigned to their source areas.These enzymes were selected as input data for a mixing-model to determine the relative contribution of the sampled sediment sources.The mean contributions from rangeland, orchard and streambank sources in the study area were estimated as 11.3%,15.1%and 73.7%, respectively.Using geochemical tracers,the mean contribution from rangeland,orchard and streambank sources was estimated as 14.1%,9.5%and 74.8%,respectively.Combined biochemical and geochemical tracers,similar values were obtained(18.7%,10.7%and 70.7%,respectively).Our results indicate that soil enzyme activity allows for a good characterization of sediment sources,and can provide a complementary tool to currently existing sediment fingerprinting approaches.However, the method should be also tested in other regions. | Kazem NOSRATI Gerard GOVERS Hassan AHMADI Forood SHARIFI Mohammad Ali AMOOZEGAR Roel MERCKX Matthias VANMAERCKE | 2011 | International Journal of Sediment Research2011，26，2： | 5 |
| 2 | Evaluating the effects of changes in landscape structure on soil erosion by water and tillage显示文摘 | Kristof Van Oost Gerard Govers Phillipe Desmet | | 0，2000，： | 1 |
| 3 | Evaluating the effects of changes in landscape structure on soil erosion by water and tillage显示文摘 | Kristof Van Oost Gerard Govers Phillipe Desmet | 2000 | Landscape Ecology2000，，6： | 1 |
| 4 | Relationship between discharge,velocity and flow area for rills eroding loose,non-layered materials显示文摘 | Gerard Govers | 1992 | Earth Surface Processes and Landforms1992，17，： | 1 |
| 5 | Effects of tillage on runoff and erosion patterns显示文摘 | Ingrid Takken Gerard Govers Victor Jetten Jeroen Nachtergaele An Steegen Jean Poesen | 2001 | Soil & Tillage Research2001，，1： | 1 |
| 6 | The effect of tillage-induced roughness on runoff and erosion patterns显示文摘 | Ingrid Takken Victor Jetten Gerard Govers Jeroen Nachtergaele An Steegen | 2001 | Geomorphology2001，，1： | 1 |
| 7 | Relations between discharge, velocity, and flow area for rill eroding loose, non-layered material显示文摘 | Gerard Govers | 1992 | Earth Surface Processes and Landforms1992，17，： | 1 |
| 8 | Relationship between discharge, velocity,and flow area for rills eroding in loose, nonlayered materials 显示文摘 | Govers Gerard | 1992 | Earth Surface Processes and Landforms1992，17，： | 1 |
| 9 | The impact of agricultural soil erosion on biogeo chemicalcycling显示文摘 | John N Quinton Gerard Govers Kristof Van Oost | 2010 | Nature Geoscience2010，3，5： | 1 |
| 10 | Rill erosion: Exploring the relationship between experiments modeling and field observations显示文摘 | GERARD GOVERS RAFAEL GIMENEZ KRISTOF VAN OOST | 2007 | Earth Science Reviews2007，84，： | 1 |
| 11 | Spatial variability in soil properties on slow-forming terraces in the Andes region of Ecuador显示文摘 | Gerd Dercon Jozef Deckers Gerard Govers | 2003 | Soil & Tillage Research2003，72，： | 1 |
| 12 | Spatially distributed modelling of soil erosion and sediment yield at regional scales in Spain显示文摘 | Joris de Vente Jean Poesen Gert Verstraeten Anton Van Rompaey Gerard Govers | 2007 | Global and Planetary Change2007，，3： | 1 |
| 13 | Variability in regional wheat yields as a function of climate, soil and economic variables : Assessing the risk of confounding 显示文摘 | Martha M Bakker Gerard Govers Frank Ewert | 2005 | Agriculture Ecosystems and Environment2005，110，： | 1 |
| 14 | Effects of tillage on runoff and erosion patterns显示文摘 | Ingrid Takken Gerard Govers | 2001 | Soil & Tillage Research2001，，61： | 1 |
| 15 | Effects of tillage on runoff and erosion pattens显示文摘 | Ingrid Takken Gerard Govers Victor Jetten | 2001 | Soil and Tillage2001，65，： | 1 |
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