Science Explorer

Exploring: Soil Sciences

Dependence of soil respiration on soil temperature and soil moisture in successional forests in Southern China

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70030715 (HTML Document 21.74 KB)

, Chinese Academy of Sciences. Additional publication details Title: Dependence of soil respiration on soil temperature and soil moisture in successional ... Dependence of soil respiration on soil temperature and soil moisture in successional forests in Southern China Journal of Integrative Plant Biology ... variations in soil respiration and its relationship with biophysical factors in forests near the Tropic of Cancer remain highly uncertain. To contribute ... towards an improvement of actual estimates, soil respiration rates, soil temperature, and soil moisture were measured in three successional subtropical ...

Soil nutrients influence spatial distributions of tropical trees species

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70031994 (HTML Document 20.76 KB)

Soil nutrients influence spatial distributions of tropical trees species Proceedings of the National Academy of Sciences of the United States of ... soil resource-based niche assembly at a local scale, using species and soil nutrient distributions obtained at high spatial resolution in three diverse ... million individual trees of 1,400 species and 10 essential plant nutrients, we used Monte Carlo simulations of species distributions to test plant-soil ... strong associations to soil nutrient distributions. Neutral dispersal assembly cannot account for these plant-soil associations or the observed niche ...

A soil burn severity index for understanding soil-fire relations in tropical forests

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70033109 (HTML Document 17.53 KB)

Academy of Sciences 2008. Additional publication details Title: A soil burn severity index for understanding soil-fire relations in tropical forests Volume: 37 Issue: 7-8 ... A soil burn severity index for understanding soil-fire relations in tropical forests By: T.B. Jain, W.A. Gould, R.T. Graham, D.S. Pilliod, L.B ... . We placed these components within a fire-disturbance continuum to guide our literature synthesis and develop an integrated soil burn severity index ... . The soil burn severity index provides a set of indicators that reflect the range of conditions present after a fire. The index consists of seven ...

Temperature response of soil respiration largely unaltered with experimental warming

Modified 2016-12-13
https://pubs.er.usgs.gov/publication/70178934 (HTML Document 29.42 KB)

Temperature response of soil respiration largely unaltered with experimental warming Proceedings of the National Academy of Sciences of the United ... , and Albert Tietema 2 ) from soil is a major yet poorly understood flux in the global carbon cycle. Climatic warming is ... hypothesized to increase rates of soil respiration, potentially fueling further increases in global temperatures. However, despite considerable scientific ... attention in recent decades, the overall response of soil respiration to anticipated climatic warming remains unclear. We synthesize the largest global ...

A simplified, data-constrained approach to estimate the permafrost carbon–climate feedback

Modified 2016-03-24
https://pubs.er.usgs.gov/publication/70169238 (HTML Document 27.63 KB)

Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences By: C.D. Koven, E.A.G. Schuur, C. Schädel, T. J ... of permafrost soils using a simplified, data-constrained model that combines three elements: soil carbon (C) maps and profiles to identify the ... distribution and type of C in permafrost soils; incubation experiments to quantify the rates of C lost after thaw; and models of soil thermal dynamics in ... assumes that C stocks do not decompose at all when frozen, but once thawed follow set decomposition trajectories as a function of soil temperature ...

Transient dwarfism of soil fauna during the Paleocene-Eocene Thermal Maximum

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70037494 (HTML Document 20.75 KB)

Transient dwarfism of soil fauna during the Paleocene-Eocene Thermal Maximum Proceedings of the National Academy of Sciences of the United States of ... America By: Abstract Soil organisms, as recorded by trace fossils in paleosols of the Willwood Formation, Wyoming, show significant body-size ... abundance during the PETM, suggesting longer periods of soil development and improved drainage conditions. Crayfish burrows and molluscan body ... subsurface temperatures, lower soil moisture conditions, or nutritionally deficient vegetation in the high-CO 2 atmosphere inferred for the PETM. Smaller ...

2000 LCU Data for the Upper Mississippi River System

Modified 2006-04-05
https://www.umesc.usgs.gov/data_library/umesc_metadata/land_cover/umesc_2000_lcu.html (HTML Document 112.34 KB)

Reed Grass, Smartweed, and other moist soil species. Attribute_Definition_Source: Upper Midwest Environmental Sciences Center and the Long Term ... : Citation: Citation_Information: Originator: Upper Midwest Environmental Sciences Center Originator: Long Term Resource Monitoring Program ... , Wisconsin Publisher: Upper Midwest Environmental Sciences Center Online_Linkage: http://www.umesc.usgs.gov/data_library/land_cover_ use ... /2000_lcu_umesc.html Online_Linkage: http://www.umesc.usgs.gov Description: Abstract: The U.S. Geological Survey's Upper Midwest Environmental Sciences Center ...

Mobility of organic solvents in water-saturated soil materials

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70013002 (HTML Document 18.12 KB)

Environmental Geology and Water Sciences By: Abstract This investigation presents an analysis of the mobility of 37 organic solvents in saturated ... soil-water systems, focusing on adsorption phenomena at the solid-liquid interface This analysis was made, in part, by applying predictive expressions ... that estimate the potential magnitude of adsorption by soil materials Of the 37 solvents considered, 19 were classified as either "very highly mobile ... satisfactory first approximations of the magnitude of adsorption of these solvents by soil materials ?? 1985 Springer-Verlag New York Inc. Additional ...

Selected papers in the hydrologic sciences 1984; July 1984

Modified 2012-02-02
https://pubs.er.usgs.gov/publication/wsp2262 (HTML Document 18.42 KB)

Water Supply Paper 2262 Download citation as: RIS Abstract The rapid, accurate measurement of the oxygen content of soil gas in the unsaturated zone ... or dissolved oxygen in soil water in the saturated zone can be useful in wetland vegetation studies. A method has been devised and tested in the Great ... Dismal Swamp, a wetland with fine silt-clay and organic soils, that appears to provide good results. A 60-milliliter sample of soil gas or water is ... withdrawn from permanently installed chambers at various depths in the soil profile. The oxygen concentration of air samples is measured with a ...

SOFIA - Groundwater Control of Mangrove Surface Elevation: Shrink and Swell Varies with Soil Depth

Modified 2013-09-04
https://sofia.usgs.gov/publications/papers/mang_surf_elev/index.html (HTML Document 12.99 KB)

Groundwater Control of Mangrove Surface Elevation: Shrink and Swell Varies with Soil Depth 1 U.S. Geological Survey, Florida Integrated Science ... Center, c/o Florida International University, Department of Biological Sciences, Owa Ehan. 167, University Park, 11200 SW 8 Street, Miami, Florida 33199 2 ...

Development and application of a soil organic matter-based soil quality index in mineralized terrane of the Western US

Modified 2016-12-05
https://pubs.er.usgs.gov/publication/70178655 (HTML Document 20.95 KB)

Development and application of a soil organic matter-based soil quality index in mineralized terrane of the Western US Environmental Earth Sciences ... By: S.W. Blecker, Lisa L. Stillings, M.C. Amacher, J.A. Ippolito, and N.M. DeCrappeo Abstract Soil quality indices provide a ... developed in agroecosytems, then forested ecosystems, an index using the relation between soil organic matter and other key soil properties in more semi ... types, acid sulfate and Cu/Mo porphyry in California and Nevada, were studied. Soil samples were collected from undisturbed soils in both mineralized and ...

Agricultural Non-point Pollutant Loading Patterns in Upper Mississippi River Watersheds

Modified 2016-01-29
https://www.umesc.usgs.gov/reports_publications/psrs/psr_1998_12.html (HTML Document 18.89 KB)

loadings to the UMRS. The objectives of this study are to develop a soil erosion map using the Universal Soil Loss Equation (USLE ... hydrologic response units by overlaying slope, soil, landcover and isoerodent (rainfall index) maps for calculating soil ... erosion rates using the Universal Soil Loss Equation and sediment delivery ratio and (3) use of multiple regression ... consists of digital maps of USGS 8-digit hydrologic units, landcover, soil, slope, soil erodibility factor, rainfall erosion ...

Persisting effects of armored military maneuvers on some soils of the Mojave Desert

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70013037 (HTML Document 19.49 KB)

Persisting effects of armored military maneuvers on some soils of the Mojave Desert Environmental Geology and Water Sciences By: Abstract Soil ... California's eastern Mojave Desert Recording penetrometer measurements show that tracks left by a single pass of an M3 "medium" tank have average soil ... resistance values that are 50% greater than those of the surrounding untracked soil in the upper 20 cm At one site, measurements made along short ... , undisturbed soils Dirt roadways at three former base camp locations could not be penetrated below 5-10 cm because of extreme compaction Soil bulk density ...

Future dryness in the Southwest US and the hydrology of the early 21st century drought

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70037566 (HTML Document 21.03 KB)

Future dryness in the Southwest US and the hydrology of the early 21st century drought Proceedings of the National Academy of Sciences of the United ... the models produced considerably greater drought activity, particularly in the Colorado River Basin, as judged from soil moisture anomalies and other ... soil moisture over the historical record ranged from 4 to 10 years, but in the 21st century simulations, some of the dry events persisted for 12 years ... soil moisture. As the climate continues to warm and soil moisture deficits accumulate beyond historical levels, the model simulations suggest that ...

Topographic controls on the chemistry of subsurface stormflow

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70023418 (HTML Document 19.58 KB)

winter of 1996-97, resulting in elevated NO3- concentrations in soil water, groundwater and streamflow. We sampled shallow subsurface stormflow (SSSF ... topographic index of Beven and Kirkby (1979; Hydrological Sciences Bulletin 24: 43-69). Topographic index was positively correlated with NO3- concentrations ... in SSSF. The strength of the NO3- -topography relationship was best explained by antecedent soil temperature and antecedent precipitation conditions ... . Results suggest a topographically driven flushing of high NO3- shallow soil at the site during storm events. Copyright ?? 2001 John Wiley & Sons, Ltd. Additional publication details Series title: Hydrological Processes ...

4f4e4771e4b07f02db47e1e4.xml

Modified 2016-12-05
https://data.usgs.gov/metadata/USGS_Libraries_Program/4f4e4771e4b07f02db47e1e4.xml ( 7.08 KB)

Limnology Marine biology Ocean sciences Planetary sciences Soil sciences ... USGS Thesaurus Aquatic biology Atmospheric sciences ... Geophysics Glaciology Hydrology Information sciences Land use change ...

Simulated long-term changes in river discharge and soil moisture due to global warming

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70026889 (HTML Document 20.41 KB)

Simulated long-term changes in river discharge and soil moisture due to global warming Hydrological Sciences Journal/Journal des Sciences ... and soil moisture, that could occur by the middle of the 21st century in response to combined increases of greenhouse gases and sulphate aerosols ... from other tropical and many mid-latitude rivers are smaller, with both positive and negative signs. For soil moisture, the results of this study ... the dry season. From middle to high latitudes of the Northern Hemisphere, soil moisture decreases in summer but increases in winter. Additional ...

Responses of wind erosion to climate-induced vegetation changes on the Colorado Plateau

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70036038 (HTML Document 20.60 KB)

Responses of wind erosion to climate-induced vegetation changes on the Colorado Plateau Proceedings of the National Academy of Sciences of the United ... likely cause reductions in perennial vegetation cover, which leaves soil surfaces exposed to erosion. Accelerated rates of dust emission from wind erosion ... , depending on the species. Second, we used these vegetation monitoring results and measurements of soil stability as inputs into a field-validated wind ... erosion model and found that declines in perennial vegetation cover coupled with disturbance to biological soil crust resulted in an exponential ...

Geographer.pdf

Modified 2013-12-05
https://education.usgs.gov/docs/Geographer.pdf (PDF Document 321.32 KB)

the sciences including climate and land-use changes, geology, meteorology, soil sciences, hydrology, biology, and much more. Geographer, GS-150 ...

Coccidioides niches and habitat parameters in the southwestern United States: A matter of scale

Modified 2012-03-12
https://pubs.er.usgs.gov/publication/70031049 (HTML Document 20.29 KB)

have been infected by Coccidioides at all of the sites. Soil variables considered in the upper 20 cm of the soil profile included pH, electrical ... . Thermometerswere buried to determine the temperature range in the upper part of the soil where Coccidioides is often found. With the exception of temperature ... regimes and soil textures, it is striking that none of the other variables or group of variables that might be definitive are indicative of the ... examined soil locations are noteworthy as generally 50% of the individuals who were exposed to the dust or were excavating dirt at the sites were infected ...