Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1111/gcb.12306 |
Changes in biocrust cover drive carbon cycle responses to climate change in drylands | |
Maestre, Fernando T.1; Escolar, Cristina1; Ladron De Guevara, Monica2; Quero, Jose L.1,3; Lazaro, Roberto2; Delgado-Baquerizo, Manuel4; Ochoa, Victoria1; Berdugo, Miguel1; Gozalo, Beatriz1; Gallardo, Antonio4 | |
通讯作者 | Maestre, Fernando T. |
来源期刊 | GLOBAL CHANGE BIOLOGY
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ISSN | 1354-1013 |
EISSN | 1365-2486 |
出版年 | 2013 |
卷号 | 19期号:12页码:3835-3847 |
英文摘要 | Dryland ecosystems account for ca. 27% of global soil organic carbon (C) reserves, yet it is largely unknown how climate change will impact C cycling and storage in these areas. In drylands, soil C concentrates at the surface, making it particularly sensitive to the activity of organisms inhabiting the soil uppermost levels, such as communities dominated by lichens, mosses, bacteria and fungi (biocrusts). We conducted a full factorial warming and rainfall exclusion experiment at two semiarid sites in Spain to show how an average increase of air temperature of 2-3 degrees C promoted a drastic reduction in biocrust cover (ca. 44% in 4years). Warming significantly increased soil CO2 efflux, and reduced soil net CO2 uptake, in biocrust-dominated microsites. Losses of biocrust cover with warming through time were paralleled by increases in recalcitrant C sources, such as aromatic compounds, and in the abundance of fungi relative to bacteria. The dramatic reduction in biocrust cover with warming will lessen the capacity of drylands to sequester atmospheric CO2. This decrease may act synergistically with other warming-induced effects, such as the increase in soil CO2 efflux and the changes in microbial communities to alter C cycling in drylands, and to reduce soil C stocks in the mid to long term. |
英文关键词 | bacteria biological soil crusts carbon cycling climate change drylands fungi lichens soil CO2 efflux soil net CO2 exchange |
类型 | Article |
语种 | 英语 |
国家 | Spain |
收录类别 | SCI-E |
WOS记录号 | WOS:000326836000023 |
WOS关键词 | BIOLOGICAL SOIL CRUSTS ; CO2 EFFLUX ; SUCCESSIONAL STAGES ; NITROGEN-FIXATION ; SPECIES RICHNESS ; COLORADO PLATEAU ; SEMIARID PLANT ; NEGEV DESERT ; LICHEN ; RESPIRATION |
WOS类目 | Biodiversity Conservation ; Ecology ; Environmental Sciences |
WOS研究方向 | Biodiversity & Conservation ; Environmental Sciences & Ecology |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/177440 |
作者单位 | 1.Univ Rey Juan Carlos, Escuela Super Ciencias Expt & Tecnol, Dept Biol & Geol, Area Biodiversidad Conservac, Mostoles 28933, Spain; 2.Estn Expt Zonas Aridas CSIC, La Canada De San Urbano 04120, Spain; 3.Univ Cordoba, Escuela Tecn Super Ingn Agron & Montes, Dept Ingn Forestal, E-14071 Cordoba, Spain; 4.Univ Pablo de Olavide, Dept Sistemas Fis Quim & Nat, Seville 41013, Spain |
推荐引用方式 GB/T 7714 | Maestre, Fernando T.,Escolar, Cristina,Ladron De Guevara, Monica,et al. Changes in biocrust cover drive carbon cycle responses to climate change in drylands[J],2013,19(12):3835-3847. |
APA | Maestre, Fernando T..,Escolar, Cristina.,Ladron De Guevara, Monica.,Quero, Jose L..,Lazaro, Roberto.,...&Gallardo, Antonio.(2013).Changes in biocrust cover drive carbon cycle responses to climate change in drylands.GLOBAL CHANGE BIOLOGY,19(12),3835-3847. |
MLA | Maestre, Fernando T.,et al."Changes in biocrust cover drive carbon cycle responses to climate change in drylands".GLOBAL CHANGE BIOLOGY 19.12(2013):3835-3847. |
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