Search Results - "Stark, John M"

Controls on Nitrogen Cycling in Terrestrial Ecosystems: A Synthetic Analysis of Literature Data by Booth, Mary S., Stark, John M., Rastetter, Edward

“…Isotope pool dilution studies are increasingly reported in the soils and ecology literature as a means of measuring gross rates of nitrogen (N) mineralization,…”
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Sagebrush carrying out hydraulic lift enhances surface soil nitrogen cycling and nitrogen uptake into inflorescences by Cardon, Zoe G., Stark, John M., Herron, Patrick M., Rasmussen, Jed A.

“…Plant roots serve as conduits for water flow not only from soil to leaves but also from wetter to drier soil. This hydraulic redistribution through root…”
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Microbial dynamics and carbon and nitrogen cycling following re-wetting of soils beneath two semi-arid plant species by Saetre, P, Stark, J.M

“…Sporadic summer rainfall in semi-arid ecosystems can provide enough soil moisture to drastically increase CO₂ efflux and rates of soil N cycling. The…”
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Soil C and N cycling in three semiarid vegetation types: Response to an in situ pulse of plant detritus by Hooker, Toby D., Stark, John M.

“…Plant detritus is an important source of labile C that drives soil microbial growth and regulates the balance of N mineralization and immobilization. In…”
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Ammonium availability and temperature control contributions of ammonia oxidizing bacteria and archaea to nitrification in an agricultural soil by Ouyang, Yang, Norton, Jeanette M., Stark, John M.

“…Soil ammonia-oxidizing bacteria and archaea (AOB and AOA) convert ammonium/ammonia to nitrite in the process of nitrification. However, the potentially…”
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High rates of nitrification and nitrate turnover in undisturbed coniferous forests by Stark, John M, Hart, Stephen C

“…A 15N isotope-dilution technique was used in intact soil cores to measure gross rates of nitrification and microbial assimilation of NOnegative 3 in 11…”
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Plant community effects on soil moisture and nitrogen cycling in a semi-arid ecosystem by Morris, Kendalynn A., Saetre, Peter, Norton, Urszula, Stark, John M.

“…Wildlands of the United States’ Intermountain West contain recurring interspersed plant-community types; namely native sagebrush ( Artemisia tridentata spp…”
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Ammonia-oxidizing bacteria are more responsive than archaea to nitrogen source in an agricultural soil by Ouyang, Yang, Norton, Jeanette M., Stark, John M., Reeve, Jennifer R., Habteselassie, Mussie Y.

“…In the majority of agricultural soils, ammonium (NH4+) is rapidly converted to nitrate (NO3−) in the biological ammonia and nitrite oxidation processes known…”
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Regulation and measurement of nitrification in terrestrial systems by Norton, Jeanette M, Stark, John M

“…Understanding nitrification rates and their regulation continues as a key area of research for assessing human's increasing impact on the terrestrial N cycle…”
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Soil temperature and moisture as key controls of phosphorus export in mountain watersheds by Gianniny, Gordon, Stark, John M., Abbott, Benjamin W., Lee, Raymond, Brahney, Janice

“…Oligotrophic mountain lakes act as sensitive indicators of landscape-scale changes in mountain regions due to their low nutrient concentration and remote,…”
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Unraveling mechanisms underlying effects of wetting–drying cycles on soil respiration in a dryland by Liang, Guopeng, Reed, Sasha C., Stark, John M., Waring, Bonnie G.

“…Rewetting of dry soils usually stimulates soil carbon (C) emission, a phenomenon known as the Birch effect. Soil C cycling in drylands, which store…”
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Carbon control on terrestrial ecosystem function across contrasting site productivities: the carbon connection revisited by Dove, Nicholas C., Stark, John M., Newman, Gregory S., Hart, Stephen C.

“…Understanding how altered soil organic carbon (SOC) availability affects microbial communities and their function is imperative in predicting impacts of global…”
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invasive annual cheatgrass increases nitrogen availability in 24-year-old replicated field plots by Stark, John M, Norton, Jeanette M

“…Previous studies comparing invaded and non-invaded sites suggest that cheatgrass (Bromus tectorum L.) causes soil N cycling to increase. Unfortunately, these…”
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Diffusion technique for preparing salt solutions, Kjeldahl digests, and persulfate digests for nitrogen-15 analysis by Stark, J.M. (Utah State Univ., Logan, UT.), Hart, S.C

“…When diffusion techniques are used to prepare samples for 15N analyses, low or variable N recovery is sometimes observed. The effect of low recovery on…”
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The effect of plant invasion on soil microbial carbon‐use efficiency in semi‐arid grasslands of the Rocky Mountain West by Nasto, Megan K., McLeod, Morgan Luce, Bullington, Lorinda, Lekberg, Ylva, Stark, John M.

“…Grassland ecosystems invaded by exotic plant species often exhibit substantially higher above‐ground productivity and soil nitrogen (N) than the native…”
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Evaluation of nutrient assimilative capacity in waterfowl impoundments: the role of environmental stressors by Wood, Rachel L, Stark, John M, Aanderud, Zachary T, Baker, Michelle A

“…The effectiveness of wetlands in sequestering nutrients and improving water quality relies on a suite of abiotic and biotic conditions. To more fully…”
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The invasive annual cheatgrass releases more nitrogen than crested wheatgrass through root exudation and senescence by Morris, Kendalynn A., Stark, John M., Bugbee, Bruce, Norton, Jeanette M.

“…Plant-soil feedbacks are an important aspect of invasive species success. One type of feedback is alteration of soil nutrient cycling. Cheatgrass invasion in…”
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Water and nitrogen uptake are better associated with resource availability than root biomass by Kulmatiski, Andrew, Adler, Peter B., Stark, John M., Tredennick, Andrew T.

“…Plant uptake of soil water and nitrogen can determine plant growth, community composition, and ecosystem functioning. Despite its importance, resource uptake…”
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Water pulses and biogeochemical cycles in arid and semiarid ecosystems by Austin, Amy T, Yahdjian, Laura, Stark, John M, Belnap, Jayne, Porporato, Amilcare, Norton, Urszula, Ravetta, Damian A, Schaeffer, Sean M

“…The episodic nature of water availability in arid and semiarid ecosystems has significant consequences on belowground carbon and nutrient cycling. Pulsed water…”
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Soil History as a Primary Control on Plant Invasion in Abandoned Agricultural Fields by Kulmatiski, Andrew, Beard, Karen H., Stark, John M.

“…1. Abandoned agricultural (AA) fields are often invaded by exotic plants. This observation has been difficult to explain because agricultural practices change…”
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