Fire-prone forests in the American west are presently slated for extensive fuels reduction treatments, yet the effect on soil CO2 efflux rates, or soil respiration, has received little attention. This study utilizes the homogeneity of a Sierra Nevada ponderosa (Pinus ponderosa Dougl. ex P. & C. Laws)–Jeffrey pine (Pinus jeffreyi, Grev. & Balf.) plantation to investigate changes in soil respirat...

Here we report N(2)O emission results for freshwater marshes isolated from human activities at the Sanjiang Experimental Station of Marsh Wetland Ecology in northeastern China. These results are important for us to understand N(2)O emission in natural processes in undisturbed freshwater marsh. Two adjacent plots of Deyeuxia angustifolia freshwater marsh with different water regimes, i.e., seaso...

Pyrophosphate is themain form of condensedP in the fluid fertilizer ammonium polyphosphate (APP). When APP is applied to soil, pyrophosphate is hydrolyzed to orthophosphate. Hydrolysis of pyrophosphate was investigated in a highly calcareous soil over 3 wk. Changes in P speciation were measured using solid-state P nuclear magnetic resonance (NMR) spectroscopy for dried soil samples and ion chro...

H34C-05.Moody, J. A., and D. A. Martin (2001), Initial hydrologic and geomorphic response following a wildfire in the Colorado Front Range, Earth Surf.Processes Landforms, 26, 1049–1070.Moody, J. A., J. D. Smith, and B. W. Ragan (2005), Critical shear stress forerosion of cohesive soils subjected to temperatures typical of wildfires,J. Geophys. Res., 110, F01004, doi:10.1029...

soil alkalinity and salinity are serious problems in arid and semi-arid regions, and therefore monitoring of soil ph and electrical conductivity (ec) is necessary in any region. the present study aimed to properly interpolate soil ph and ec as soil quality indices in a semi-arid mountainous area with annual precipitation of 342.4 mm. the study area is the karimabad rangelands in hamadan provinc...

Proxy information is used to stratify larger areas, and then measurements within each of these strata are agCarbon storage in soils is important to forest ecosystems. Moreover, gregated and multiplied by the area of each stratum forest soils may serve as important C sinks for ameliorating excess (Schimel and Potter, 1995). Soil survey maps and laboraatmospheric CO2. Spatial estimates of soil or...

A b s tra c t A lthough below ground ecosystems have been studied extensively and soil biota play integral roles in biogeochem icai processes, surprisingly we have a lim ited understanding o f global patterns in below ground biom ass and com m unity structure. T o address this critical gap, we conducted a meta-analysis o f published data (> 1300 datapoints) to com pare below ground plant, m icr...

soil moisture is a determinant factor in most of complex environmental processes and has an important role in agricultural drought occurrence. methods based on remote sensing are preferred to point measurements due to their better spatial and temporal precision. hence, in this research amsr-e surface soil moisture data of aqua satellite have been evaluated and their correlation to five years (2...

To evaluate spatial variability of nitrous oxide (N2O) emissions and to elucidate their determining factors on a field-scale basis, N2O fluxes and various soil properties were evaluated in a 100- x 100-m onion (Allium cepa L.) field. Nitrous oxide fluxes were determined by a closed chamber method from the one-hundred 10- x 10-m plots. Physical (e.g., bulk density and water content), chemical (e...

eurotia ceratoides (l.) c. a. mey is an important plant species in semi-arid landsin iran. new approaches are required to determine the distribution of this plant species. forthis reason, geographical distributions of eurotia ceratoides were assessed using threedifferent models including: multiple discriminant analysis (mda), ecological niche factoranalysis (enfa) and logistic regression (lr). ...