Environmental Controls on Soil and Whole-ecosystem Respiration from a Tallgrass Prairie

Franzluebbers, Kathrin; Franzluebbers, Alan J.; Jawson, M. D.

doi:10.2136/sssaj2002.0254

Cited by 45 publications

(18 citation statements)

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“…In general, an increase in soil temperature positively aff ected soil surface CO 2 effl ux when soil moisture was greater than 20%, but the opposite was true when soil moisture was <20%. Similar results were presented by Franzluebbers et al (2002). Additionally, across the entire growing season, certain plant species had lower soil surface CO 2 effl ux compared to other plant species (Table 4).…”

Section: Soil Surface Carbon Dioxide Effl Uxsupporting

confidence: 80%

Soil Carbon Dynamics and Carbon Budget of Newly Reconstructed Tall‐grass Prairies in South Central Iowa

Guzman

Al‐Kaisi

2010

J of Env Quality

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In addition to their aesthetic and environmental qualities, reconstructed prairies can act as C sinks and potentially offset rising atmospheric CO(2) concentration. The objective of this study was to quantify C budget components of newly established prairies on previously cultivated land. Net ecosystem production (NEP) was estimated using a C budgeting approach that assessed SOC content, soil surface CO(2)-C emission, and above- and belowground plant biomass. Study was conducted in southern Iowa, in 2005 to 2007. Results show that differences between sites for potential total C input were primarily due to root biomass contributions, which ranged from 0.8 to 5.4 Mg C ha(-1). Average potential aboveground biomass C input was 2.7 Mg C ha(-1) in 2006 and 5.5 Mg C ha(-1) in 2007. Total soil CO(2)-C emissions from heterotrophic respiration increased as prairie age increased from 2.9 to 4.0 Mg C ha(-1) and 3.1 to 4.7 Mg C ha(-1) in 2006 and 2007, respectively. Determination of NEP showed that the 1998 and 2003 reconstructed prairie sites had the greatest potential for soil C sequestration at 4.1 and 4.4 Mg C ha(-1). Increases in SOC content were only observed in the youngest established prairie site (2003) and the no-till site in 2003 at 2.1 and 2.6 Mg C ha(-1) yr(-1), respectively. Declines of SOC sequestration rates occurred when potential C equilibrium was reached (R(h) = NPP) within 10 yr since prairie establishment.

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Section: Soil Surface Carbon Dioxide Effl Uxsupporting

confidence: 80%

Soil Carbon Dynamics and Carbon Budget of Newly Reconstructed Tall‐grass Prairies in South Central Iowa

Guzman

Al‐Kaisi

2010

J of Env Quality

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“…Carbon dioxide fl uxes were positively correlated with soil and air temperature and negatively correlated with soil moisture content, indicating an increase in CO 2 emissions with an increase in temperature and a decrease in soil moisture (Table 3). Similarly, an increase in CO 2 fl ux with an increase in soil temperature was also observed in agricultural (Mosier et al, 2006), tall grass prairie (Franzluebbers et al, 2002), and forest soils (Bowden et al, 1998). However, Shinjo et al (2006) observed CO 2 emissions related with soil temperature, but not with soil moisture content.…”

Section: Factors Aff Ecting Carbon Dioxide Methane and Nitrous Oxidmentioning

confidence: 73%

Greenhouse Gas Emissions and Global Warming Potential of Reclaimed Forest and Grassland Soils

2009

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Although greenhouse gas (GHG) emissions from soils are important, reclaimed mine soil (RMS) ecosystems are not widely assessed. Postreclamation land uses (forest, hay, and pasture) were investigated to: (i) monitor the magnitude of GHG fluxes, (ii) estimate their global warming potential (GWP), (iii) identify the relationship between GHG fluxes and soil properties, and (iv) develop a soil quality index by principal component analysis (PCA). The GHG fluxes were measured for 1 yr cycle and simultaneous measurements were also made for soil moisture and temperature. The RMS-forest, -hay, and -pasture land uses had weighted average fluxes of 1.16, 1.66, and 3.06 g CO(2)-C m(-2) d(-1); 0.33, 0.48 and 1.1 mg CH(4)-C m(-2) d(-1); and 0.33, 0.70, and 1.06 mg N(2)O-N m(-2) d(-1), respectively. The CO(2), CH(4), and N(2)O fluxes were consistently high in the RMS-pasture and low in the RMS-forest. The GWP (CO(2)-C equivalent) of the postreclamation land uses was in the order of RMS-forest (4.5 Mg ha(-1) yr(-1)) = RMS-hay (6.8 Mg ha(-1) yr(-1)) < RMS-pasture (12.3 Mg ha(-1) yr(-1)). The PCA showed that four PCs with eigenvalues > 1 explained 88.8% of the total variance in the soil properties. The first PC is mostly characterized by soil physical properties and the second by chemical properties. Soil and air temperatures were positively correlated with CO(2), CH(4), and N(2)O fluxes. The results suggest that GWP from RMS can be minimized by establishing forest land use.

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“…This is especially true for systems dominated by wet-dry cycles where a substantial contribution of soil micro-organisms to the CO 2 efflux is expected (Austin et al, 2004;Huxman et al, 2004a). However, some fraction of efflux should be related to the respiratory activity of plants and correlated with deeper, rooting zone soil moisture and transpiration (Franzluebbers et al, 2002;Chimner and Welker, 2005), and another fraction could be related to the release of CO 2 from the precipitation of carbonates in the soil profile during drying cycles (Emmerich, 2003).…”

Section: Introductionmentioning

confidence: 99%

Partitioning of evapotranspiration and its relation to carbon dioxide exchange in a Chihuahuan Desert shrubland

Scott

Huxman

Cable

et al. 2006

Hydrological Processes

194

154

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Key to evaluating the consequences of woody plant encroachment on water and carbon cycling in semiarid ecosystems is a mechanistic understanding of how biological and non-biological processes influence water loss to the atmosphere. To better understand how precipitation is partitioned into the components of evapotranspiration (bare-soil evaporation and plant transpiration) and their relationship to plant uptake of carbon dioxide (CO 2 ) as well as ecosystem respiratory efflux, we measured whole plant transpiration, evapotranspiration, and CO 2 fluxes over the course of a growing season at a semiarid Chihuahuan Desert shrubland site in south-eastern Arizona. Whole plant transpiration was measured using the heat balance sap-flow method, while evapotranspiration and net ecosystem exchange (NEE) of CO 2 were quantified using the Bowen ratio technique.Before the summer rainy season began, all water and CO 2 fluxes were small. At the onset of the rainy season, evapotranspiration was dominated by evaporation and CO 2 fluxes were dominated by respiration as it took approximately 10 days for the shrubs to respond to the higher soil moisture content. During the growing season, periods immediately following rain events (<2 days) were dominated by evaporation and respiration while transpiration and CO 2 uptake peaked during the interstorm periods. The surface of the coarse, well-drained soils dried quickly, rapidly reducing evaporation. Overall, the ratio of total transpiration to evapotranspiration was 58%, but it was around 70% during the months when the plants were active. Peak respiration responses following rain events generally lagged after the evaporation peak by a couple of days and were better correlated with transpiration. Transpiration and CO 2 uptake also decayed rather quickly during interstorm periods, indicating that optimal plant soil moisture conditions were rarely encountered. NEE of CO 2 was increasingly more negative as the growing season progressed, indicating a greater net uptake of CO 2 and greater water use efficiency due mainly to decreases in respiration.

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Environmental Controls on Soil and Whole-ecosystem Respiration from a Tallgrass Prairie

Cited by 45 publications

References 0 publications

Soil Carbon Dynamics and Carbon Budget of Newly Reconstructed Tall‐grass Prairies in South Central Iowa

Soil Carbon Dynamics and Carbon Budget of Newly Reconstructed Tall‐grass Prairies in South Central Iowa

Greenhouse Gas Emissions and Global Warming Potential of Reclaimed Forest and Grassland Soils

Partitioning of evapotranspiration and its relation to carbon dioxide exchange in a Chihuahuan Desert shrubland

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