The Effects of Natural and Human Disturbances on Soil Nitrogen Dynamics and Trace Gas Fluxes in a Puerto Rican Wet Forest

Pa, Steudler; Jm, Melillo; Rd, Bowden; Ms, Castro; Ae, Lugo

doi:10.2307/2388252

Cited by 138 publications

(102 citation statements)

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“…By the summer following the blowdown, however, uptake rates were routinely greater in the control than the blowdown. The lack of a strong CH4 response in this study differs from decreased uptake by tropical forest soils subjected to a catastrophic hurricane or to forest clearcutting (Keller et al 1986;Steudler et al 1991).…”

Section: Resultsmentioning

confidence: 57%

Fluxes of greenhouse gases between soils and the atmosphere in a temperate forest following a simulated hurricane blowdown

et al. 1993

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JSTOR is a not-for-profit service that helps scholars, researchers, and students discover, use, and build upon a wide range of content in a trusted digital archive. We use information technology and tools to increase productivity and facilitate new forms of scholarship. For more information about JSTOR, please contact support@jstor.org.Springer is collaborating with JSTOR to digitize, preserve and extend access to Biogeochemistry.http://www.jstor.org Abstract. Fluxes of nitrous oxide (N20), carbon dioxide (CO2), and methane (CH4) between soils and the atmosphere were measured monthly for one year in a 77-year-old temperate hardwood forest following a simulated hurricane blowdown. Emissions of CO2 and uptake of CH4 for the control plot were 4.92 MT C ha-l y-~ and 3.87 kg C ha-1 y-1, respectively, and were not significantly different from the blowdown plot. Annual N20 emissions in the control plot (0.23 kg N ha-1 y-1) were low and were reduced 78% by the blowdown. Net N mineralization was not affected by the blowdown. Net nitrification was greater in the blowdown than in the control, however, the absolute rate of net nitrification, as well as the proportion of mineralized N that was nitrified, remained low. Fluxes of CO2 and CH4 were correlated positively to soil temperature, and CH4 uptake showed a negative relationship to soil moisture. Substantial resprouting and leafing out of downed or damaged trees, and increased growth of understory vegetation following the blowdown, were probably responsible for the relatively small differences in soil temperature, moisture, N availability, and net N mineralization and net nitrification between the control and blowdown plots, thus resulting in no change in CO2 or CH4 fluxes, and no increase in N20 emissions.

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Section: Resultsmentioning

confidence: 57%

Fluxes of greenhouse gases between soils and the atmosphere in a temperate forest following a simulated hurricane blowdown

et al. 1993

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“…As análises foram realizadas num período máximo de 10 h após a coleta. As concentrações de N 2 O foram medidas em cromatógrafo gasoso com detector de captura de elétrons (Mini Shimadzu-2) mantido em temperatura de 310 °C (Bowden et al, 1990;Steudler et al, 1991 A concentração inicial do N-inorgânico (Quadro 2) foi obtida após extração feita com solução de KCl 2 mol L -1 e 10 g de terra, sendo as concentrações de N-NH 4 + e N-NO 3 -determinadas no extrato, usandose um sistema automático de injeção de fluxo contínuo (FIA) (Ruzicka & Hansen, 1981). O N-NH 4 + foi medido por condutivimetria, pelo método de Solorzano, e o N-NO 3 -foi determinado colorimetricamente na forma de N-NO 2 -, após a redução em coluna de Cd.…”

Section: Incubações Sob Condições Controladas De Laboratóriounclassified

Disponibilidade de nitrogênio e fluxos de N2O a partir de solo sob pastagem após aplicação de herbicida

Carmo

Andrade

Cerri³

et al. 2005

Rev. Bras. Ciênc. Solo

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“…Field measurements did indicate that the lowland tropical forests in Costa Rica were "hot spots" for the emissions of N 2 O due to its high rainfall and high nitrogen availability (Keller et al 1986Matson and Vitousek, 1987;Livingston et al, 1988;Robertson and Tiedje, 1988;Luizao et al, 1989;Steudler et al, 1991;Keller and Reiners, 1994).…”

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confidence: 99%

Simulation of nitrous oxide and nitric oxide emissions from tropical primary forests in the Costa Rican Atlantic Zone

Liu

Reiners

Keller

et al. 2000

Environmental Modelling & Software

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Nitrous oxide (N 2 O) and nitric oxide (NO) are important atmospheric trace gases participating in the regulation of global climate and environment. Predictive models on the emissions of N 2 O and NO emissions from soil into the atmosphere are required. We modified the CENTURY model (Soil Sci. Soc. Am. J., 51 (1987) 1173) to simulate the emissions of N 2 O and NO from tropical primary forests in the Atlantic Zone of Costa Rica at a monthly time step. Combined fluxes of N 2 O and NO were simulated as a function of gross N mineralization and water-filled pore space (WFPS). The coefficients for partitioning N 2 O from NO were derived from field measurements (Global Biogeochem. Cycles, 8 (1994) 399). The modified CENTURY was calibrated against observations of carbon stocks in various pools of forest ecosystems of the region, and measured WFPS and emission rates of N 2 O and NO from soil to the atmosphere.WFPS is an important factor regulating nutrient cycling and emissions of N2O and NO from soils making the accuracy of the WFPS prediction central to the modeling process. To do this, we modified the hydrologic submodel and developed a new method for the prediction of WFPS at the monthly scale from daily rainfall information. The new method is based on: (1) the relationship between monthly rainfall and the number of rainfall events, and (2) the relative cumulative frequency distribution of ranked daily rainfall events. The method is generic and should be applicable to other areas.Simulated monthly average WFPS was 0.68±0.02 -identical with the field measurement average of 0.68±0.02 from the annual cycle observed by Keller and Reiners (Global Biogeochem. Cycles, 8 (1994) . The simulated N 2 O/NO ratio was 11.2±1.9 compared with the measured value of 10.9±4.7. WFPS is the dominant determinant of the fraction of gross N mineralization that is emitted from the soil as N 2 O and NO. If WFPS were not limiting during part of the year, this fraction would be 4.2%. With some periods of lower WFPS, the realized fraction is 2.2%. Because of the strong relationships between N 2 O and NO emission rates and rainfall and its derivative, WFPS, these moisture variables can be used to scale up nitrogen trace gas fluxes from sites to larger spatial scales.

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The Effects of Natural and Human Disturbances on Soil Nitrogen Dynamics and Trace Gas Fluxes in a Puerto Rican Wet Forest

Cited by 138 publications

References 9 publications

Fluxes of greenhouse gases between soils and the atmosphere in a temperate forest following a simulated hurricane blowdown

Fluxes of greenhouse gases between soils and the atmosphere in a temperate forest following a simulated hurricane blowdown

Disponibilidade de nitrogênio e fluxos de N2O a partir de solo sob pastagem após aplicação de herbicida

Simulation of nitrous oxide and nitric oxide emissions from tropical primary forests in the Costa Rican Atlantic Zone

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