Hall,
Steven
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Academic or Administrative Unit
The Department of Ecology, Evolution, and Organismal Biology seeks to teach the studies of ecology (organisms and their environment), evolutionary theory (the origin and interrelationships of organisms), and organismal biology (the structure, function, and biodiversity of organisms). In doing this, it offers several majors which are codirected with other departments, including biology, genetics, and environmental sciences.
History
The Department of Ecology, Evolution, and Organismal Biology was founded in 2003 as a merger of the Department of Botany, the Department of Microbiology, and the Department of Zoology and Genetics.
Dates of Existence
2003–present
Related Units
- College of Agriculture and Life Sciences (parent college)
- College of Liberal Arts and Sciences (parent college)
- Department of Botany (predecessor, 2003)
- Department of Microbiology (predecessor, 2003)
- Department of Zoology and Genetics (predecessor, 2003)
The Department of Ecology, Evolution, and Organismal Biology seeks to teach the studies of ecology (organisms and their environment), evolutionary theory (the origin and interrelationships of organisms), and organismal biology (the structure, function, and biodiversity of organisms). In doing this, it offers several majors which are codirected with other departments, including biology, genetics, and environmental sciences.
History
The Department of Ecology, Evolution, and Organismal Biology was founded in 2003 as a merger of the Department of Botany, the Department of Microbiology, and the Department of Zoology and Genetics.
Dates of Existence
2003–present
Related Units
- College of Agriculture and Life Sciences (parent college)
- College of Liberal Arts and Sciences (parent college)
- Department of Botany (predecessor, 2003)
- Department of Microbiology (predecessor, 2003)
- Department of Zoology and Genetics (predecessor, 2003)
About
ORCID iD
Search Results
Mechanisms underlying episodic nitrate and phosphorus leaching from poorly drained agricultural soils
Potential carbon mineralization assays are confounded by different soil drying temperatures
Standardized Data to Improve Understanding and Modeling of Soil Nitrogen at Continental Scale
Dinitrogen Emissions Dominate Nitrogen Gas Emissions From Soils With Low Oxygen Availability in a Moist Tropical Forest
Insights on agricultural nitrate leaching from soil block mesocosms
Extreme low-flow conditions in a dual-chamber denitrification bioreactor contribute to pollution swapping with low landscape-scale impact
Poorly drained depressions can be hotspots of nutrient leaching from agricultural soils
Resolving the influence of lignin on soil organic matter decomposition with mechanistic models and continental-scale data
Field-applying an inexpensive, 13C-depleted, labile carbon source to study in situ fate and short-term effects on soils
Aims: Here, we evaluated the impact of adding an in situ pulse of an inexpensive and 13C-depleted source of Clabile—crude glycerol carbon (Cglyc), a by-product from biodiesel
production—to agricultural soils under typical crop rotations in Iowa, USA.
Methods:We broadcast-applied Cglyc at three rates (0, 216, and 866 kg C ha−1) in autumn after soybean harvest, tracked its fate, and measured its impact on soil C and N dynamics
to four depths (0–5, 5–15, 15–30, and 30–45 cm). Nineteen days later, we measured Cglyc in microbial biomass carbon (MBC), salt-extractable organic C, and potentially mineralizable C pools.We paired these measurements with nitrate N (NO3−–N) and potential net Nmineralization to examine short-term effects on N cycling.
Results: Cglyc was found to at least 45-cm depth with the majority in MBC (18%–23% of total Cglyc added). The δ13C values of the other measured C pools were too variable to
accurately track the Clabile fate. NO3−–N was decreased by 13%–57% with the 216 and 866 kg C ha−1 rates, respectively, and was strongly related to greater microbial uptake
of Cglyc (i.e., immobilization via microbial biomass). Crude glycerol application had minor effects on soil pH—the greatest rate decreased pH 0.18 units compared to the control.
Conclusions:Overall, glycerol is an inexpensive and effectiveway to measure in situ,Clabile dynamics with soil depth—analogous to how mobile, dissolved organic C might behave in
soils—and can be applied to rapidly immobilize NO3−–N.
Controls on organic and inorganic soil carbon in poorly drained agricultural soils with subsurface drainage