dc.contributor.author | Billings, Sharon A. | |
dc.contributor.author | Schaeffer, Sean M. | |
dc.date.accessioned | 2012-04-18T18:14:25Z | |
dc.date.available | 2012-04-18T18:14:25Z | |
dc.date.issued | 2004 | |
dc.identifier.citation | Billings, S. A., S. M. Schaeffer, and R. D. Evans (2004), Soil microbial activity and N availability with elevated CO2 in Mojave Desert soils, Global Biogeochem. Cycles, 18, GB1011, http://dx.doi.org/10.1029/2003GB002137 | |
dc.identifier.uri | http://hdl.handle.net/1808/9150 | |
dc.description.abstract | We examined the effects of elevated CO2 on soil nitrogen (N) dynamics in the Mojave Desert by measuring plant N isotope composition (δ15N), soil microbial biomass N, soil respiration, resin-available N, and C and N dynamics during soil incubations. With elevated CO2, foliage of Larrea tridentata and Krameria erecta had mean δ15N 2.1 and 1.1‰ higher with elevated CO2, respectively, and elevated CO2 increased microbial biomass N in dry soils under a perennial grass (6.8 ± 1.4 versus 3.7 ± 0.3 μg/g). Elevated CO2 significantly increased cumulative resin-available N in the field by 12%, driven by available soil moisture. Rates of soil respiration with elevated CO2 were sporadically higher under Pleuraphis and Larrea. Soils under shrubs had greater potential net N mineralization (102.6 ± 24.2 μg/g) than soils under grasses and in plant interspaces (40.0 ± 9.69 μg/g). Rates of recalcitrant N turnover in soil incubations were related to soil substrate availability. Results indicate that shifts in soil microbial structure and/or activity may occur with elevated CO2 and may result in increases in plant-available N when soil moisture is available. | |
dc.language.iso | en_US | |
dc.publisher | American Geophysical Union | |
dc.rights | This published article is © American Geophysical Union and can found on the publisher's website at http://dx.doi.org/10.1029/2003GB002137 | |
dc.subject | elevated CO2 | |
dc.subject | soil microorganisms | |
dc.title | Soil microbial activity and N availability with elevated CO2 in Mojave Desert soils | |
dc.type | Article | |
kusw.kuauthor | Billings, Sharon A. | |
kusw.kudepartment | Ecology and Evolutionary Biology | |
kusw.oanotes | 17-Apr-12 subject to Restrictions below, author can archive publisher's version/PDF"
"•Preprints and Authors final version on Authors own or departmental website
•Set statements to accompany pre-print, submitted, accepted and published articles
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•Publisher's version/PDF must be used in Institutional Repository 6 months after publication." | |
kusw.oastatus | fullparticipation | |
dc.identifier.doi | 10.1029/2003GB002137 | |
kusw.oaversion | Scholarly/refereed, publisher version | |
kusw.oapolicy | This item meets KU Open Access policy criteria. | |
dc.rights.accessrights | openAccess | |