Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1007/s11104-012-1404-3 |
Biological soil crusts increase the resistance of soil nitrogen dynamics to changes in temperatures in a semi-arid ecosystem | |
Delgado-Baquerizo, Manuel1; Maestre, Fernando T.2; Gallardo, Antonio1 | |
通讯作者 | Delgado-Baquerizo, Manuel |
来源期刊 | PLANT AND SOIL
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ISSN | 0032-079X |
EISSN | 1573-5036 |
出版年 | 2013 |
卷号 | 366期号:1-2页码:35-47 |
英文摘要 | Biological soil crusts (BSCs), composed of mosses, lichens, liverworts and cyanobacteria, are a key component of arid and semi-arid ecosystems worldwide, and play key roles modulating several aspects of the nitrogen (N) cycle, such as N fixation and mineralization. While the performance of its constituent organisms largely depends on moisture and rainfall conditions, the influence of these environmental factors on N transformations under BSC soils has not been evaluated before. The study was done using soils collected from areas devoid of vascular plants with and without lichen-dominated BSCs from a semi-arid Stipa tenacissima grassland. Soil samples were incubated under different temperature (T) and soil water content (SWC) conditions, and changes in microbial biomass-N, dissolved organic nitrogen (DON), amino acids, ammonium, nitrate and both inorganic N were monitored. To evaluate how BSCs modulate the resistance of the soil to changes in T and SWC, we estimated the Orwin and Wardle Resistance index. The different variables studied were more affected by changes in T than by variations in SWC at both BSC-dominated and bare ground soils. However, under BSCs, a change in the dominance of N processes from a net nitrification to a net ammonification was observed at the highest SWC, regardless of T. Our results suggest that the N cycle is more resistant to changes in T in BSC-dominated than in bare ground areas. They also indicate that BSCs could play a key role in minimizing the likely impacts of climate change on the dynamics of N in semi-arid environments, given the prevalence and cover of these organisms worldwide. |
英文关键词 | Semiarid ecosystem N depolymerization rate N mineralization rate DON |
类型 | Article |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000317988600004 |
WOS关键词 | DISSOLVED ORGANIC NITROGEN ; COLORADO PLATEAU ; BIOGEOCHEMICAL CYCLES ; MICROBIAL BIOMASS ; WATER ; RESPONSES ; CARBON ; MINERALIZATION ; INSIGHTS ; MODULATE |
WOS类目 | Agronomy ; Plant Sciences ; Soil Science |
WOS研究方向 | Agriculture ; Plant Sciences |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/179254 |
作者单位 | 1.Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013, Spain; 2.Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Area Biodiversidad & Conservac, Dept Biol & Geol, Mostoles 28933, Spain |
推荐引用方式 GB/T 7714 | Delgado-Baquerizo, Manuel,Maestre, Fernando T.,Gallardo, Antonio. Biological soil crusts increase the resistance of soil nitrogen dynamics to changes in temperatures in a semi-arid ecosystem[J],2013,366(1-2):35-47. |
APA | Delgado-Baquerizo, Manuel,Maestre, Fernando T.,&Gallardo, Antonio.(2013).Biological soil crusts increase the resistance of soil nitrogen dynamics to changes in temperatures in a semi-arid ecosystem.PLANT AND SOIL,366(1-2),35-47. |
MLA | Delgado-Baquerizo, Manuel,et al."Biological soil crusts increase the resistance of soil nitrogen dynamics to changes in temperatures in a semi-arid ecosystem".PLANT AND SOIL 366.1-2(2013):35-47. |
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