Contribution of biological crust to soil CO₂ efflux in a Mediterranean shrubland ecosystem

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• 作者：Lourdes Morillas^a ; ^{lmorvin@upo.es} ; Veronica Bellucco^a ; ^b ; ^{vbellucco@uniss.it} ; Mauro Lo Cascio^a ; ^b ; ^{mlocascio@uniss.it} ; Serena Marras^a ; ^b ; ^{serenam@uniss.it} ; Donatella Spano^a ; ^b ; ^{spano@uniss.it} ; Simone Mereu^a ; ^b ; ^{si.mereu@gmail.com}
• 关键词：Soil temperature ; Soil moisture ; Semiarid ecosystems ; Soil respiration ; Spatial and temporal heterogeneity ; Carbon cycling
• 刊名：Geoderma
• 出版年：2017
• 出版时间：1 March 2017
• 年：2017
• 卷：289
• 期：Complete
• 页码：11-19
• 全文大小：723 K
• 卷排序：289

文摘

Biocrust contributes substantially to total soil CO2 efflux in semiarid ecosystems. Soil temperature is not a key driver of biocrust respiration in semiarid ecosystems. Biocrust respiration is decoupled from the CO2 efflux of deeper soil layers. The Lloyd and Taylor model was the best fit for soil but not for biocrust respiration. Accurate carbon cycle analysis should account for the respiration of the biocrust.