Impact of forest ditching on nutrient loadings of a small stream--a paired catchment study in Kronoby, W. Finland.
The effect of ditching of boreal forest land (W. Finland) on P and N dynamics and export was assessed using a paired catchment approach (response stream + control stream) for a 4-year study period. After the ditching operations, there was a small but significant increase in the NH4+ export, but no significant changes in the concentrations and loads of total reactive P, total non-reactive P, total organic N and NO3-. In both streams, the reactive P fraction largely followed the Fe concentrations. High input to output ratios, and thus, high retention was a typical feature of the inorganic N compounds. Total organic N and the TOC/TON ratio were positively correlated with the total organic carbon.
Aström
Mats
M
Department of Geology and Mineralogy, Abo Akademi University, Finland. mats.astrom@abo.fi
Aaltonen
Eeva-Kaarina
EK
Koivusaari
Juhani
J
D004738:Engineering; D004784:Environmental Monitoring; D005387:Finland; D009584:Nitrogen / Q000032:analysis*; D009930:Organic Chemicals; D010758:Phosphorus / Q000032:analysis*; D012987:Soil; D014197:Trees; D014867:Water / Q000737:chemistry; D014872:Water Movements
D009930:Organic Chemicals; D012987:Soil; D014867:Water; D010758:Phosphorus; D009584:Nitrogen