Effects of whole catchment liming and Mg addition on soil water and runoff at two forested watersheds in the Black Forest (Germany)

Nitrogen Excess in North American Ecosystems: Predisposing Factors, Ecosystem Responses, and Management Strategies

“…Glatzel (1990) concluded that the N storage capacity of forest soils may be managed by optimal tree species selection and by improving the base status of soils by liming and fertilization. However, some studies indicate that liming increases net nitrification rates and leaching, probably as a result of more favorable Ϫ NO 3 soil pH values after liming (Marschner et al 1989, Deboer et al 1993, Brahmer 1994. Riparian ecotones.-Riparian ecotones can be highly effective in removing N and P in runoff from agricultural watersheds (Lowrance et al 1984, Peterjohn andCorrell 1984).…”

The long-term effects of catchment liming and reduced sulphur deposition on forest soils and runoff chemistry in southwest Sweden

“…However, an observation common to many studies is poor lime penetration with a large proportion of the effects from liming limited to the O and upper A and E soil horizons (Brahmer, 1994;Blette and Newton, 1996).…”

Relationships Between Hydrology and Soils Describe Vegetation Patterns in Seasonally Flooded Tree Islands of the Southern Everglades, Florida

“…However, NO 3 ) + NO 2 ) concentrations were not related to patterns in soil Eh. Thus, this variation may have been related to nitrification influenced by groundwater fluxes of mineral-rich water that increased availability of oxidized forms of N (Brahmer, 1994;Zhu and Ehrenfeld, 1999). In seasonally flooded soils of an Amazon floodplain, large numbers of nitrifying bacteria were found despite low soil Eh, and were correlated with spatially variable soil moisture and NH 4 + concentrations (Koschorreck and Darwich, 2003).…”

“…As canal sources of water are enriched in inorganic forms of N relative to marsh surface water, subsurface flow through the permeable karst limestone may be a significant source of available nitrogen if this upward movement of water occurs in seasonally flooded tree islands. Thus, increased nitrification rates produced by spatially variable inflows of calcium-rich, high pH groundwater may increase N availability in soils (Brahmer, 1994;Zhu and Ehrenfeld, 1999). In the southern Everglades, groundwater inflows of inorganic N are thought to be important (Sutula et al, 2001), and in an Australian swamp explain up to 50% of the total nitrogen budget (Raisin et al, 1999).…”