Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s00442-002-1130-2 |
Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability | |
Schaeffer, SM; Billings, SA; Evans, RD | |
通讯作者 | Schaeffer, SM |
来源期刊 | OECOLOGIA
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ISSN | 0029-8549 |
出版年 | 2003 |
卷号 | 134期号:4页码:547-553 |
英文摘要 | We investigated the effects of changes in soil C and N availability on N mineralization, nitrification, denitrification, NH3 volatilization, and soil respiration in the Mojave Desert. Results indicate a C limitation to microbial N cycling. Soils from underneath the canopies of Larrea tridentata (DC.) Cov., Pleuraphis rigida Thurber, and Lycium spp. exhibited higher rates of CO2 flux, lower rates of NH3 volatilization, and a decrease in inorganic N (NH4+-N and NO3--N) with C addition. In addition to C limitation, soils from plant interspaces also exhibited a N limitation. Soils from all locations had net immobilization of N over the course of a 15-day laboratory incubation. However, soils from interspaces had lower rates of net nitrification and potential denitrification compared to soils from under plant canopies. The response to changes in C availability appears to be a short-term increase in microbial immobilization of inorganic N. Under controlled conditions, and over a longer time period, the effects of C and N availability appear to give way to larger differences due to spatial location. These findings have implications for ecosystems undergoing changes in soil C and N availability due to such processes as desertification, exotic species invasions, or elevated atmospheric CO2 concentration. |
英文关键词 | ammonia volatilization denitrification microbial activity mineralization soil respiration |
类型 | Article |
语种 | 英语 |
国家 | USA |
收录类别 | SCI-E |
WOS记录号 | WOS:000181582700012 |
WOS关键词 | SHRUB-STEPPE ECOSYSTEM ; NORTHERN CHIHUAHUAN DESERT ; ELEVATED ATMOSPHERIC CO2 ; MICROBIAL BIOMASS ; HARDWOOD FOREST ; DENITRIFICATION ; IMMOBILIZATION ; GRASSLAND ; OXIDE ; LIMITATIONS |
WOS类目 | Ecology |
WOS研究方向 | Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/145534 |
作者单位 | (1)Univ Arkansas, Stable Isotope Lab, Fayetteville, AR 72701 USA |
推荐引用方式 GB/T 7714 | Schaeffer, SM,Billings, SA,Evans, RD. Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability[J],2003,134(4):547-553. |
APA | Schaeffer, SM,Billings, SA,&Evans, RD.(2003).Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability.OECOLOGIA,134(4),547-553. |
MLA | Schaeffer, SM,et al."Responses of soil nitrogen dynamics in a Mojave Desert ecosystem to manipulations in soil carbon and nitrogen availability".OECOLOGIA 134.4(2003):547-553. |
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