Soil biogeochemistry of the capillary fringe in laboratory mesocosms with contrasting soil textures

2020 ◽  
Vol 84 (3) ◽  
pp. 1011-1021
Author(s):  
Jaclyn C. Fiola ◽  
Martin C. Rabenhorst ◽  
Erica Scaduto ◽  
Christopher R. Seitz ◽  
Keegan M.S. Rankin
Keyword(s):  
Capillary Fringe ◽  
Soil Biogeochemistry

Soil biogeochemistry across Central and South American tropical dry forests

2021 ◽  
Author(s):  
Bonnie G. Waring ◽  
Mark E. De Guzman ◽  
Dan V. Du ◽  
Juan M. Dupuy ◽  
Maga Gei ◽  
...  
Keyword(s):  
Tropical Dry Forests ◽  
South American ◽  
Dry Forests ◽  
Soil Biogeochemistry

Water exclusion from tunnel cavities in the saturated capillary fringe

2004 ◽  
Vol 27 (3) ◽  
pp. 237-243 ◽  
Author(s):  
E.G. Youngs ◽  
A.R. Kacimov ◽  
Yu.V. Obnosov
Keyword(s):  
Capillary Fringe

scholarly journals Spatial impacts of a multi-individual grave on microbial and microfaunal communities and soil biogeochemistry

PLoS ONE ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. e0208845 ◽  
Author(s):  
Sarah W. Keenan ◽  
Alexandra L. Emmons ◽  
Lois S. Taylor ◽  
Gary Phillips ◽  
Allison R. Mason ◽  
...  
Keyword(s):  
Soil Biogeochemistry ◽  
Spatial Impacts

Soil biogeochemistry during the early spring in low arctic mesic tundra and the impacts of deepened snow and enhanced nitrogen availability

2009 ◽  
Vol 99 (1-3) ◽  
pp. 127-141 ◽  
Author(s):  
Kate M. Buckeridge ◽  
Yan-Ping Cen ◽  
David B. Layzell ◽  
Paul Grogan
Keyword(s):  
Nitrogen Availability ◽  
Early Spring ◽  
Soil Biogeochemistry ◽  
Low Arctic

scholarly journals Quantitative high-resolution observations of soil water dynamics in a complicated architecture using time-lapse ground-penetrating radar

2015 ◽  
Vol 19 (3) ◽  
pp. 1125-1139 ◽  
Author(s):  
P. Klenk ◽  
S. Jaumann ◽  
K. Roth
Keyword(s):  
High Resolution ◽  
Water Content ◽  
Soil Water ◽  
Ground Penetrating Radar ◽  
Time Lapse ◽  
Test Site ◽  
Water Dynamics ◽  
Soil Water Dynamics ◽  
Capillary Fringe ◽  
Ground Penetrating

Abstract. High-resolution time-lapse ground-penetrating radar (GPR) observations of advancing and retreating water tables can yield a wealth of information about near-surface water content dynamics. In this study, we present and analyze a series of imbibition, drainage and infiltration experiments that have been carried out at our artificial ASSESS test site and observed with surface-based GPR. The test site features a complicated but known subsurface architecture constructed with three different kinds of sand. It allows the study of soil water dynamics with GPR under a wide range of different conditions. Here, we assess in particular (i) the feasibility of monitoring the dynamic shape of the capillary fringe reflection and (ii) the relative precision of monitoring soil water dynamics averaged over the whole vertical extent by evaluating the bottom reflection. The phenomenology of the GPR response of a dynamically changing capillary fringe is developed from a soil physical point of view. We then explain experimentally observed phenomena based on numerical simulations of both the water content dynamics and the expected GPR response.

scholarly journals Spatial changes in soil stable isotopic composition in response to carrion decomposition

2019 ◽  
Vol 16 (19) ◽  
pp. 3929-3939 ◽  
Author(s):  
Sarah W. Keenan ◽  
Sean M. Schaeffer ◽  
Jennifer M. DeBruyn
Keyword(s):  
Soft Tissue ◽  
Isotopic Composition ◽  
Microbial Communities ◽  
Soft Tissues ◽  
Soil Microbial Communities ◽  
Bulk Soil ◽  
Soil Biogeochemistry ◽  
Stable Isotopic Composition ◽  
Stable Isotopic ◽  
Carrion Decomposition

Abstract. Decomposition provides a critical mechanism for returning nutrients to the surrounding environment. In terrestrial systems, animal carcass, or carrion, decomposition results in a cascade of biogeochemical changes. Soil microbial communities are stimulated, resulting in transformations of carbon (C) and nitrogen (N) sourced from the decaying carrion soft tissues, changes to soil pH, electrical conductivity, and oxygen availability as microbial communities release CO2 and mineralize organic N. While many of the rapid changes to soil biogeochemistry observed during carrion decomposition return to background or starting conditions shortly after soft tissues are degraded, some biogeochemical parameters, particularly bulk soil stable δ15N isotopic composition, have the potential to exhibit prolonged perturbations, extending for several years. The goal of this study was to evaluate the lateral and vertical changes to soil stable isotopic composition 1 year after carrion decomposition in a forest ecosystem. Lateral transects extending 140 cm from three decomposition “hotspots” were sampled at 20 cm intervals, and subsurface cores were collected beneath each hotspot to a depth of 50 cm. Bulk soil stable isotopic composition (δ15N and δ13C) indicated that 1 year after complete soft tissue removal and decay, soils were significantly 15N enriched by 7.5±1.0 ‰ compared to control soils up to 60 cm from the hotspot center, and enrichment extended to a depth of 10 cm. Hotspot soils also contained 10 % more N compared to control soils, indicating that decomposition perturbs N pools. Our results demonstrate that carrion decomposition has the potential to result in long-term changes to soil biogeochemistry, up to at least 1 year after soft tissue degradation, and to contribute to bulk soil stable isotopic composition.

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