ABSTRACT
Watershed studies reveal important information on the effects of forest harvesting and ecosystem disturbances on water and solute yield. Since the rst study by Bormann and Likens (1967), studies of nutrient cycling in steep mountainous watersheds have shown that changes to stream yields of nutrients and mineral weathering products vary with vegetation cover, climate, and forest management practices. Most studies show increases in concentrations of nitrate after clearcutting (Bormann et al. 1968; Swank 1988; McHale et al. 2008). Concentrations of other solutes such as sulfate
CONTENTS
Introduction .........................................................................................................433 Watershed Studies at the MEF ..........................................................................434 Effects of Harvest and Regeneration of Upland Aspen Forests on Stream Chemistry ................................................................................................436 Conversion of an Upland Forest from Hardwoods to Conifers ................... 439
Effects of Uplands Clearcutting and Forest Conversion on Stream Solutes .............................................................................................................. 441 Effect of Cattle Grazing on Stream Fecal Coliform Counts in Streams ....446 Effect of Sulfate Additions on Stream Methylmercury .............................449
Chemical Responses to Upland Forest Harvesting in Lowland Peatland Watersheds in Relation to Other Studies ........................................450 Hydrologic Responses to Peatland Harvests .................................................. 452 Bog Stripcut and Clearcut .................................................................................. 452 Fen Clearcut .........................................................................................................454 Summary ..............................................................................................................455 References .............................................................................................................456
