Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1016/j.ejsobi.2017.07.002 |
Wetting-drying cycles influence on soil respiration in two Mediterranean ecosystems | |
Morillas, Lourdes1,2; Roales, Javier1; Portillo-Estrada, Miguel3; Gallardo, Antonio1 | |
通讯作者 | Morillas, Lourdes |
来源期刊 | EUROPEAN JOURNAL OF SOIL BIOLOGY |
ISSN | 1164-5563 |
EISSN | 1778-3615 |
出版年 | 2017 |
卷号 | 82页码:10-16 |
英文摘要 | This study assesses which factors are involved in the soil respiration (Sr) response to wetting-drying cycles in two Mediterranean ecosystems. We analysed Sr, mineral nitrogen, ion-exchange resin mineral nitrogen, and phosphate levels at weekly intervals over one year in two Mediterranean ecosystems with contrasting characteristics: a pine forest with high levels of organic matter and nutrients and a shrubland with low carbon and nutrients availability. Higher Sr was detected in the pine forest (0.12-0.76 g CO2 m(-2) hour(-1)) than in the shrubland (0.04-0.67 g CO2 m(-2) hour(-1)). For both sites, Sr increased during wet periods and decreased during dry periods. Compared with Sr in the pine forest, the trend observed for resin mineral nitrogen was the opposite. No pattern was observed for resin mineral nitrogen at the shrubland site, or for mineral nitrogen or phosphate at either site. The initial water status of the wetting-drying cycles determined the Sr response, whereas the length of the drought period before the rewetting event had no effect. The impact of the initial soil water content on Sr played a crucial role when the wetting-drying events occur in a dry soil, having a secondary role in wet soils. Finally, soil water status drove Sr during the growing season win both ecosystems; however, soil temperature had no effect on CO2 efflux. In a changing world with projections of intensifying wetting-drying events, our results highlight the influence of soil water status on respiration rates, especially when these events occur in a dry soil. (C) 2017 Elsevier Masson SAS. All rights reserved. |
英文关键词 | Soil moisture CO2 efflux Mineral nitrogen Phosphate Resin mineral N Carbon mineralization |
类型 | Article |
语种 | 英语 |
国家 | Spain ; Italy ; Belgium |
收录类别 | SCI-E |
WOS记录号 | WOS:000415779600002 |
WOS关键词 | PRECIPITATION PULSES ; WATER ; NITROGEN ; DECOMPOSITION ; RELEASE ; EFFLUX ; DESERT |
WOS类目 | Ecology ; Soil Science |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/198870 |
作者单位 | 1.Univ Pablo Olavide, Dept Sistemas Fis Quim & Nat, Ctra Utrera Km1, Seville, Spain; 2.Univ Sassari, Dept Sci Nat & Environm Resources, Via Enrico de Nicola 9, I-07100 Sassari, Italy; 3.Univ Antwerp, Dept Biol, Ctr Excellence PLECO Plant & Ecosyst, Univ Pl 1, B-2610 Antwerp, Belgium |
推荐引用方式 GB/T 7714 | Morillas, Lourdes,Roales, Javier,Portillo-Estrada, Miguel,et al. Wetting-drying cycles influence on soil respiration in two Mediterranean ecosystems[J],2017,82:10-16. |
APA | Morillas, Lourdes,Roales, Javier,Portillo-Estrada, Miguel,&Gallardo, Antonio.(2017).Wetting-drying cycles influence on soil respiration in two Mediterranean ecosystems.EUROPEAN JOURNAL OF SOIL BIOLOGY,82,10-16. |
MLA | Morillas, Lourdes,et al."Wetting-drying cycles influence on soil respiration in two Mediterranean ecosystems".EUROPEAN JOURNAL OF SOIL BIOLOGY 82(2017):10-16. |
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