Mechanisms and rates of atmospheric deposition of selected trace elements and sulfate to a deciduous forest watershed. [Roles of dry and wet deposition concentrations measured in Walker Branch Watershed]

Lindbeŕg, Steven E.; Harriss, Robert C.; Turner, R. R.; Shriner, D.S.; Huff, D. D.

doi:10.2172/5997611

Cited by 22 publications

(15 citation statements)

References 0 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The amounts of tf inorganic N in forest gaps (3.5 kg ha -1 ), edges (3.4 kg ha -1 ) and closed forest plots (4.9 kg ha -1 ), July through September, were within range of annual tf fluxes for northern hardwood forests in upper Michigan (9.9 kg ha -1 year -1 ) (MacDonald et al 1992) and at Hubbard Brook Experimental Forest in New Hampshire (10.6 and 1.8 kg ha -1 for tf and incident precipitation, respectively) (Eaton et al 1973). There is a strong negative relation in tf concentrations with the amount of precipitation (e.g., Lindberg et al 1979). Total nutrient deposition, on the other hand, is positively related to precipitation amounts (Parker 1983).…”

Section: Resultsmentioning

confidence: 99%

The effects of gap disturbance on nitrogen cycling and retention in late-successional northern hardwood–hemlock forests

Scharenbroch

Bockheim

2008

Biogeochemistry

View full text Add to dashboard Cite

Late-successional forests in the upper Great Lakes region are susceptible to nitrogen (N) saturation and subsequent nitrate (NO 3 -) leaching loss. Endemic wind disturbances (i.e., treefall gaps) alter tree uptake and soil N dynamics; and, gaps are particular susceptible to NO 3 -leaching loss. Inorganic N was measured throughout two snow-free periods in throughfall, forest floor leachates, and mineral soil leachates in gaps (300-2,000 m 2 , 6-9 years old), gap-edges, and closed forest plots in late-successional northern hardwood, hemlock, and northern hardwood-hemlock stands. Differences in forest water inorganic N among gaps, edges, and closed forest plots were consistent across these cover types: NO 3 -inputs in throughfall were significantly greater in undisturbed forest plots compared with gaps and edges; forest floor leachate NO 3 -was significantly greater in gaps compared to edges and closed forest plots; and soil leachate NO 3 -was significantly greater in gaps compared to the closed forest. Significant differences in forest water ammonium and pH were not detected. Compared to suspected N-saturated forests with high soil NO 3 -leaching, undisturbed forest plots in these late-successional forests are not losing NO 3 -(net annual gain of 2.8 kg ha -1 ) and are likely not N-saturated. Net annual NO 3 -losses were observed in gaps (1.3 kg ha -1 ) and gap-edges (0.2 kg ha -1 ), but we suspect these N leaching losses are a result of decreased plant uptake and increased soil N mineralization associated with disturbance, and not N-saturation.

show abstract

Section: Resultsmentioning

confidence: 99%

The effects of gap disturbance on nitrogen cycling and retention in late-successional northern hardwood–hemlock forests

Scharenbroch

Bockheim

2008

Biogeochemistry

View full text Add to dashboard Cite

show abstract

“…Wet deposition includes two processes: rainout, where the constituent is incorporated into droplets within the cloud; and washout, where the constituent is removed by falling precipitation below the cloud (Rodhe & Grandell 1972). Precipitation is usually regarded as the most important and efficient mechanism of particulate, aerosol, and gas removal from the atmosphere (Junge 1963), but exceptions can occur for some constituents (Lindberg et al 1979). The efficiency of these scavengng processes has been described and summarized by numerous investigators (US Energy Research andDevelopment Administration 1977, McMahon &Dennison 1979), and is related to constituent properties such as particle size, solubility, and chemical activity.…”

Section: Nitrogen Forms and Deposition Processesmentioning

confidence: 99%

Sources, fates, and impacts of nitrogen inputs to terrestrial ecosystems: review and synthesis

et al. 1988

View full text Add to dashboard Cite

Abstract. The relative importance of nitrogen inputs from atmospheric deposition and biological fixation is reviewed in a number of diverse, non-agricultural terrestrial ecosystems. Bulk precipitation inputs of N (I-12kgN ha-' yr-') are the same order of magnitude as, or frequently larger than, the usual range of inputs from nonsymbiotic fixation (< 1 -5 kg N ha-' yr-I), especially in areas influenced by industrial activity. Bulk precipitation measurements may underestimate total atmospheric deposition by 3040% because they generally do not include all forms of wet and dry deposition. Symbiotic fixation generally ranges from z lo-160 kg N ha-' yr-' in ecosystems where N-fixing species are present during early successional stages, and may exceed the range under unusual conditions.Rates of both symbiotic and nonsymbiotic fixation appear to be greater during early successional stages of forest development, where they have major impacts on nitrogen dynamics and ecosystem productivity. Fates and impacts of these nitrogen inputs are important considerations that are inadequately understood. These input processes are highly variable in space and time, and few sites have adequate comparative information on both nitrogen deposition and fixation.The existing information on N inputs is deficient in several areas: -more intensive studies of total atmospheric deposition, especially of dry deposition, are needed over a wide range of ecosystems; -additional studies of symbiotic fixation are needed that carefully quantify variation over space and time, examine more factors regulating fixation, and focus upon the availability of N and its effects upon productivity and other nutrient cycling processes; -process-level studies of associative N-fixation should be conducted over a range of ecosystems to determine the universal importance of rhizosphere fixation; -further examination of the role of free-living fixation in wood decomposition and soil organic matter genesis is needed, with attention upon spatial and temporal variation; and -investigations of long-term biogeochemical impacts of these inputs must be integrated with process-level studies using modem modelling techniques.

show abstract

“…Incident precipitation is described as water that falls on the forest directly (Parker 1983). It is also referred to as gross fall (Lindberg et al 1979) and most times, the incident precipitation is oft en intercepted by the canopy (Kittredge 1948). Th roughfall refers to the precipitation which passes through the canopy and falls to the ground.…”

Section: Introductionmentioning

confidence: 99%

Litterfall, precipitation and nutrient fluxes in a secondary lowland rain forest in Ile-Ife, Nigeria

2011

View full text Add to dashboard Cite

Litterfall, precipitation and nutrient fl uxes in a secondary lowland rain forest in Ile-Ife, Nigeria RESUMO (Queda de serrapilheira, precipitação e fl uxo de nutrientes em uma fl oresta pluvial secundária de terras baixas em Il-Ife, Nigéria) Produção de serapilheira, precipitação e o fl uxo de nutrientes foram investigados em uma parcela de 0,25 ha de uma fl oresta pluvial secundária de terras baixas em Ile-Ife, Nigéria, por um período de um ano. O estudo determinou a magnitude dos fl uxos de nutrientes através da serrapilheira, da chuva incidente, da interceptada, da escoada pelo tronco, e também avaliou a importância relativa desses componentes como vias de transporte de nutrientes para o solo desta fl oresta. Houve variação mensal signifi cativa na produção e acúmulo de serapilheira com maiores valores ocorrendo de novembro a março. A concentração de elementos em tanto na chuva interceptada como na escoada pelo tronco foram maiores que na chuva incidente. Maiores quantidades de cálcio, magnésio, ferro, cobre, zinco e nitrogênio foram depositados anualmente a partir da serrapilheira no chão da fl oresta, enquanto maiores quantidades de mercúrio, potássio, sódio, fósforo, chumbo e enxofre foram depositados através de precipitação. Ocorreu lixiviação de todos os elementos pela passagem da precipitação pelo dossel com a exceção de cobre, íons de hidrogênio, e chumbo, que foram retidos no dossel. Como conclusão este estudo mostra que a serapilheira é a principal via para a ciclagem de cálcio, magnésio, nitrogênio e todos micronutrientes investigados. A precipitação é o principal via para a ciclagem de potássio, fósforo, enxofre e traços de metais tóxicos (mercúrio e chumbo) na fl oresta. Palavras ABSTRACT(Litterfall, precipitation and nutrient fl uxes in a secondary lowland rain forest in Ile-Ife, Nigeria). Litterfall, precipitation and nutrient fl uxes were investigated in a 0.25 ha plot of a secondary lowland rain forest in Ile-Ife, Nigeria, for a period of one year. Th e study determined the magnitude of nutrient fl uxes through (litterfall, incident rainfall, throughfall and stemfl ow) and evaluated the relative importance of these components as pathways of nutrient transport to the soil of this forest. Th ere was a signifi cant monthly variation in litterfall and the highest values of the standing crop of litter occurred from November to March. Th e concentration of elements in both throughfall and stemfl ow were higher than those of incidence rainfall. Greater quantities of calcium, magnesium, iron, zinc, copper and nitrogen were deposited annually from the forest fl oor while greater quantities of mercury, potassium, sodium, phosphorus, lead and sulphur were deposited via precipitation. Th ere was net leaching of all elements from the canopy as precipitation pass through it with the exception of copper, hydrogen ions and lead, which were retained in the canopy. Th e fi nding of this study shows that litterfall is the major pathway for the cycling of calcium, magnesium, nitrogen and all micronutrients inve...

show abstract

Mechanisms and rates of atmospheric deposition of selected trace elements and sulfate to a deciduous forest watershed. [Roles of dry and wet deposition concentrations measured in Walker Branch Watershed]

Cited by 22 publications

References 0 publications

The effects of gap disturbance on nitrogen cycling and retention in late-successional northern hardwood–hemlock forests

The effects of gap disturbance on nitrogen cycling and retention in late-successional northern hardwood–hemlock forests

Sources, fates, and impacts of nitrogen inputs to terrestrial ecosystems: review and synthesis

Litterfall, precipitation and nutrient fluxes in a secondary lowland rain forest in Ile-Ife, Nigeria

Contact Info

Product

Resources

About