... 11:37 AM Aquatic EffectsofAcidicDeposition issues, from emissions (SOS/T 1) through valuation (SOS/T 27) Of these reports, six covered aspects ofacidicdeposition aquatic effects (SOS/T through ... emissions of sulfur and nitrogen from power plants, industrial facilities, and motor vehicles are linked to acidicdeposition in many parts of the world The potential effectsofacidicdeposition ... understanding of the aquatic effectsof atmospheric depositionof nitrogen and sulfur It is intended to emphasize advancements in those aspects of aquatic effects research that are of direct policy...
... 2.1.2 Aquatic EffectsofAcidicDeposition Sensitivity to Acidification Surface waters that are sensitive to acidification from acidicdepositionof S or N typically exhibit a number of characteristics ... measured in other forms ofdeposition Gaseous deposition is calculated from the product of ambient air concentrations and estimated deposition velocities The derivation ofdeposition velocities ... estimation of atmospheric deposition in remote areas The estimation ofdepositionof atmospheric pollutants in high-elevation areas is problematic, in part because all components of the deposition...
... quantify the effectsofacidicdeposition on a regional scale A critical limitation of much of the acidicdepositioneffects research conducted to date has been, however, the nature of the questions ... quantifying the relative importance of land use activities in exacerbating or ameliorating acidicdepositioneffects The importance ofacidicdeposition as an agent of acidification does not preclude ... impacted by acidicdeposition Portions of northern Florida and to a lesser extent the Upper Midwest also contain appreciable numbers ofacidic lakes and streams, although the role ofacidic deposition...
... sensitivity of streams to acidicdeposition or the importance of episodic processes to stream chemistry The Sierra Nevada is particularly sensitive to potential acidicdepositioneffects because of the ... response to future acidicdeposition 4.2 Applachian Mountains The Appalachian Mountain region constitutes an important region of concern with respect to the effectsofacidicdeposition Many streams ... population ofacidic lakes, combined with increasing emissions of S and N for the state, stimulated investigations of the acid–base chemistry of these lakes (Pollman and Canfield, 1991) Most of these acidic...
... acidification from acidicdeposition Because of the paucity of dose–response data for the region, it is unclear what level ofdepositionof either S or N would be appropriate for the protection of aquatic ... 136 Aquatic EffectsofAcidicDeposition strong acid anions from acidicdeposition They applied regression analysis to estimate stream-water base cation concentrations as a function of SiO2 and ... hypothesis of acidification by acidicdeposition (Hendry and Brezonik, 1984; Eilers et al., 1988c; Baker et al., 1986, 1988b) Evaporative concentration of modest amounts ofacidic deposition, ...
... anthropogenic effectsofacidicdeposition In particular, N-driven episodic acidification is frequently associated with high levels of N deposition 6.2.2 Anthropogenic Effects Nitrate in snowmelt runoff ... Mountains are highly sensitive to potential acidicdepositioneffects because of the predominance of granitic bedrock, thin acidic soils, large amounts of precipitation, coniferous vegetation, and ... account for the ubiquitous nature of episodes These processes operate with or without acidicdeposition and can account for episodic loss of a few µeq/L of ANC to losses of 50 µeq/L or more during snowmelt...
... Aquatic EffectsofAcidicDeposition saturation At sites with high N deposition (20 to 54 kg N/ha per year) and significant leaching losses of NO3-, N is removed from precipitation by means of roofs ... atmospheric concentrations and depositionof N compounds and their biological effects in California forests that receive much higher depositionof N than S 7.2 Environmental Effects Excess N can affect ... from nitrification of the recent deposition (Nadelhoffer et al in press) In areas of the U.S heavily influenced by photochemical smog, such as the Los Angeles Basin, depositionof oxidized N compounds...
... February 9, 2000 2:18 PM 176 Aquatic EffectsofAcidicDeposition Increasing depositionof S and/or N Excluding the previously existing deposition via construction of roofs over entire forested plots ... relate to ecosystem responses to acidicdeposition Some of the most important contributions to the state of scientific understanding of the aquatic effectsofacidicdeposition during the past decade ... 180 Aquatic EffectsofAcidicDeposition ment began in April 1991 Data were routinely collected of meteorology, deposition, throughfall, soil solution, hydrology (tensiometers), runoff, soil chemistry,...
... 9.1 Aquatic EffectsofAcidicDeposition Model of Acidification of Groundwater in Catchments (MAGIC) MAGIC has been the principal model used thus far by NAPAP for making projections of likely future ... Atmospheric fluxes of the mass balance ions are corrected for estimated dry depositionof particulates and aerosols Dry deposition is represented as a proportion of wet deposition, using dry deposition ... Cumulative Effectsof Some of the Recent (Post-1990) Changes to the Structure and Method of Application of the MAGIC Model MAGIC Predictions (Sullivan and Cosby, 1995) of the Percentage of Adirondack...
... 256 Aquatic EffectsofAcidicDepositionof forests promotes surface water acidification via increased dry and occult depositionof S, increased evapotranspiration, and increased uptake of base cations ... February 9, 2000 2:23 PM 244 Aquatic EffectsofAcidicDeposition the park This is the portion of the Adirondack Mountains that currently contains the majority of the acidic lakes (Baker et al., 1990a,c; ... PM 240 Aquatic EffectsofAcidicDeposition 10.1.3 ELS-II During Phase II of the Eastern Lake Survey (ELS-II), a subset of ELS-I lakes was resampled during the spring and fall of 1986 This database...
... (approximately 10 µS/cm) of the study lakes and would be expected to be sensitive to episodic effectsofacidicdeposition if S or N deposition to the park increased substantially If acidicdeposition in ... Dry depositionof both N and S is expected to be low, however, probably less than 50% of wet deposition Thus, the total depositionof both S and N is very low at GLAC, and shows no indication of ... February 9, 2000 2:27 PM 284 Aquatic EffectsofAcidicDeposition uptake of N has been reached at current levels of N inputs It is likely that future increase in N deposition to these watersheds would...
... processes; that is, not a result ofacidicdeposition or depositionof acid precursors Nitrification—Oxidation of ammonium to nitrite or nitrate by microorganisms A by-product of this reaction is H+ Nitrogen ... near-shore region of a body of water; often defined as the band from the shoreline to the outer edge of the occurrence of rooted vegetation Long-term acidification—The decrease of acid neutralizing ... concentration of proton donors equals the concentration of proton acceptors Equivalent—Unit of ionic concentration, a mole of charge; the quantity of a substance that either gains or loses one mole of protons...
... november 1982 in Bokrijk-Genk Wang D., Karnosky D.F & Bormann F.H (1986) Effectsof ambient ozone on the productivity of Populus tremuloides Michx grown under field conditions Can J For Res 16, ... acid rain treatment than cv Robusta, as well for photosynthesis as for water vapor conductance Effectsof treatment were statistically significant (P = 0.05) for cv Beaupr6, but not for cv Robusta ... surements of upper and lower leaf surfaces (Fig 2) For both clones and treatments, g shows its maximal value...
... the presence of mm CaCl2 (Table 1), emphasizing the specificity of the effect of Zn2+ Thermal destabilization of PSP-I ⁄ PSP-II was also noticed at acidic pH (Fig 2B) in the absence of Zn2+ cations ... Dependence on protein concentration of the gel filtration chromatographic behaviour of PSP-I ⁄ PSP-II Effectsof Zn2+ (B) and acidic pH (C) A 0.75 lgÆmL)1 solution of 125I-labelled PSP-I ⁄ PSP-II ... enhanced at acidic pH Gel filtration of a 0.75 lgÆmL)1 solution of 125 I-labelled PSP-I ⁄ PSP-II at pH resulted in broadening of the peak and the appearance of species at the elution volume of the...
... sulfuric acid of pH’s corresponding to the average proton of the canopy of various spruce stands of the Fichtelgebirge The equivalent fraction of Mg (% Mg of E K, Ca, Mg, Al) in the solution of those ... function of acid deposition and Mg supply of the soil (Kaupenjohann, 1989) It is interesting to note that an increase of the acid load of the same soil (Fig 2) caused a higher release of both ... Effectsof high N-inputs near a chicken farm on nutrient status and vitality of Pinus sylvestris (L.) nutrient supply of P sylvestris, chemical constitution of the soil solution...
... Effectsof NO donors and inhibitor on wound healing 151 5.2.1 Effectsof GSNO on wound healing 151 5.2.2 Effectsof SNAP on wound healing 155 5.2.3 Effectsof GSH on wound healing 157 5.2.4 Effects ... 4.9.1.1.1 Effectsof GSNO on MMP2 expression in scars 138 4.9.1.1.2 Effectsof AG on MMP2 expression in scars 139 4.9.1.1.3 Effectsof GSNO on MMP9 expression in scars 141 4.9.1.1.4 Effectsof AG ... 4.2.1.2 Effectsof AG on load to failure 102 4.2.2 Stiffness of the scars 104 4.2.2.1 Effectsof GSNO, SNAP and GSH on scar stiffness 4.2.2.2 Effectsof AG on scar stiffness 4.3 104 104 108 4.3.1 Effects...
... as a result of the increase of the redox potential and decrease of the sulphides (Saeki, 1993) The change in redox potential more strongly affected the speciation of Zn than that of Cu and Pb ... finding of Wong (1995) and Hofstede (1994) Although the leachable Cu increased with the composting process, the magnitude of leachable Cu in sludge compost without red mud amendment after 50 days of ... them that the quantities of metals extracted by CaCl2, expressed as a percentage of total metal content, were small pH of the sludge compost also affected the solubility of the metal hydroxides...
... strongly acidic conditions (Hofstede, 1994) Leachabilitv of heavv metals Over 80% of the total metal content in the artificial MSW was derived from the spiking and therefore the mobility of metals ... composting of MSW although the increment was diminished by the addition of red mud (Hofstede, 1994) This was due to adsorption of soluble organic matter to red mud Plant availabilitv of heavy metals ... result of the redistribution of metal speciation during composting by humification of the organic matter Chromium speciation in municipal solid 0 day q 20th waste 21 of cornpasting Cr (w/kg) day of...