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[Spatial distribution and the influencing factors of organic carbon of biological crusts on regional scale in Mu Us sandy land, China]. / 毛乌素沙地区域尺度生物结皮有机碳.
Pang, Jing-Wen; Bu, Chong-Feng; Guo, Qi; Ju, Meng-Chen; Jiang, Man; Mo, Qiu-Xia; Wang, He-Ming.
Afiliação
  • Pang JW; Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
  • Bu CF; Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
  • Guo Q; State Key Laboratory of Soil Erosion and Dry-land Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
  • Ju MC; Beifang Investigation, Design & Research Co. Ltd., Tianjin 300200, China.
  • Jiang M; Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
  • Mo QX; Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
  • Wang HM; Institute of Soil and Water Conservation, Northwest A&F University, Yangling 712100, Shaanxi, China.
Ying Yong Sheng Tai Xue Bao ; 33(7): 1755-1763, 2022 Jul.
Article em Zh | MEDLINE | ID: mdl-36052777
As an important soil cover in deserts, biological crusts play a central role in ecosystem function such as nutrient cycling, nitrogen fixation, and carbon sequestration. Many biological crust organisms could fix CO2 through photosynthesis to improve soil organic carbon content. There is a knowledge gap in the origin of soil organic carbon (SOC) from biological crusts on a regional level, which restricts the prediction of soil carbon pool. Based on 45 plots in the Mu Us sandy land (42200 km2), we measured the SOC content and soil organic carbon density (SOCD) of two types of typical biological crusts (moss crusts, algal crusts) and their underlying soils, and analyzed together with the climate data, soil and vegetation factors to investigate the spatial distribution characteristics and controlling factors of organic carbon of biological crusts at the regional scale. The results showed that: 1) biological crusts significantly increased SOC and SOCD compared with bare ground. Moss crusts and the underlying SOC (4.93 g·kg-1) and SOCD (0.41 kg·m-2) were higher than those of algal crusts (1.89 g·kg-1, 0.18 kg·m-2). 2) On the regional scale, the SOC and SOCD of biological crusts had clear spatial distribution characteristics, demonstrating a banded distribution and block mosaic from northeast to central and west to southeast. 3) The SOC and SOCD of biological crusts and their underlying soils were mainly affected by climate, soil and vegetation conditions, while the main controlling factors depended on the types of biological crusts. The SOC and SOCD of moss crust were controlled by annual maximum temperature and potential evapotranspiration, whereas those of algal crusts were controlled by water vapor pressure.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carbono / Briófitas Tipo de estudo: Prognostic_studies País/Região como assunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Carbono / Briófitas Tipo de estudo: Prognostic_studies País/Região como assunto: Asia Idioma: Zh Revista: Ying Yong Sheng Tai Xue Bao Assunto da revista: SAUDE AMBIENTAL Ano de publicação: 2022 Tipo de documento: Article País de afiliação: China