Navratil(後のaの頭に´),T., Dhanley,J.B., Skrivan(rの頭にv),P., Kram(aの頭に´),P., Mihaljevic(cの頭にv),M. and Drahota,P.(2007): Manganese biogeochemistry in a central Czech Republic catchment. Water Air Soil Pollut., 186, 149-165.

『チェコ共和国中央部の流域におけるマンガンの生物地球化学的性質』


Abstract
 Mn biogeochemistry was studied from 1994 to 2003 in a small forested catchment in the central Czech Republic using the watershed mass balance approach together with measurements of internal stores and fluxes. Mn inputs in bulk deposition were relatively constant during a period of sharply decreasing acidic deposition, suggesting that the Mn source was terrestrial, and not from fossil fuel combustion. Mn inputs in bulk deposition and Mn supplied by weathering each averaged 13 mg m-2 year-1 (26 mg m-2 year-1 total input), whereas Mn export in streamwater and groundwater averaged 43 mg m-2 year-1. Thus an additional Mn source is needed to account for 17 mg m-2 year-1. Internal fluxes and pools of Mn were significantly greater than annual inputs and outputs. Throughfall Mn flux was 70 mg m-2 year-1, litterfall Mn flux was 103 mg m-2 year-1, and Mn net uptake by vegetation was 62 mg m-2 year-1. Large pools of labile or potentially labile Mn were present in biomass and surficial soil horizons. Small leakages from these large pools likely supply the additional Mn needed to close the watershed mass balance. This leakage may reflect an adjustment of the ecosystem to recent changes in atmospheric acidity.

Keywords: Manganese; Biogeochemistry; Czech Republic; Catchment; Biotite weathering; Forest ecosystem; Mass balance』

1. Introduction
2. Site description
3. Material and methods
4. Results and discussion
 4.1. Manganese in ecosystem compartments
  4.1.1. Bedrock
  4.1.2.Soil
  4.1.3. Stream sediment
  4.1.4. Biomass
 4.2. Summary of manganese concentrations and pools
 4.3. Mn input and output fluxes
  4.3.1. Atmospheric inputs
  4.3.2. Output through surface and subsurface flow
 4.4. Internal fluxes
  4.4.1. Mineral weathering
  4.4.2. Canopy leaching
  4.4.3. Soil leaching
  4.4.4. Annual increments in wood and bark
  4.4.5. Litterfall
 4.5. Mn mass balance
5. Summary and conclusions
Acknowledgement
References


ホーム