论文
论文标题: Biological soil crust community types differ in photosynthetic pigment composition, fluorescence and carbon fixation in Shapotou region of China
作者: Lan, Shubin; Ouyang, Hailong; Wu, Li; Zhang, Delu; Hu, Chunxiang
出版刊物: APPLIED SOIL ECOLOGY
出版日期: MAR
出版年份: 2017
卷/期:
DOI: 10.1016/j.apsoil.2016.11.009
论文摘要: In order to ensure the smooth operation of the Baotou-Lanzhou railway in Shapotou region of China (southeast edge of the Tengger Desert), vegetation protecting system was established, and then substantial biological soil crusts (BSCs) gradually developed there, however so far little study has focused on the refined crust community types and their related ecological functions. In this study, eight main crust community types were distinguished from the restoration region, and their pigment composition and photosynthetic performance were compared through spectrophotometry, chlorophyll fluorescence and infrared gas analysis technologies. The results showed that crust chlorophyll-a and carotenoids contents had a good linear relationship (R-2 = 0.964; P < 0.001), generally increased with the development and succession of BSCs, while crust scytonemin content was highest in cyanolichen soil crusts. When chlorophyll-a content was less than 15 mu g cm(-2), crust original fluorescence (Fo) linearly increased with the increasing chlorophyll-a content (R-2 = 0.758; P = 0.001), providing a convenient approach to monitor crust photosynthetic biomass in situ, but without crust destruction. Compared with cyanobacterial and cyanolichen soil crusts, chlorolichen and moss soil crusts had the higher photosynthetic activities (Fv/Fm), although the chlorolichen soil crusts performed the lowest net photosynthetic carbon fixation (average 1.5-1.8 mmol CO2 m(-2) h(-1)), while moss soil crusts had the greater carbon fixation efficiency, about 2.4-7.5 fold higher according to the different community types. Conclusively, a finely divided classification of BSCs will not only improve the estimation of crust carbon fixation, but also strengthen the accuracy and importance of crust community types at the landscape scale. (C) 2016 Elsevier B.V. All rights reserved.
== 实验室与学会 ==
  • == 实验室与学会 ==
  • 淡水生态与生物技术国家重点实验室
  • 中国科学院藻类生物学重点实验室
  • 农业部淡水养殖病害防治重点实验室
  • 武汉白暨豚保护基金会
  • 湖北省海洋湖沼学会
  • 中国动物学会原生动物学分会
  • 中国动物学会斑马鱼分会
  • 湖北省暨武汉动物学会
  • 中国水产学会鱼病学专业委员会
  • 中国鱼类学会
== 平台建设 ==
  • == 平台建设 ==
  • “一带一路”海域赤潮数据库
  • 国家水生生物种质资源库
  • 国家斑马鱼资源中心
  • 中国科学院淡水藻种库
  • 中国科学院武汉生命科学大型仪器区域中心
  • 湿地生态系统观测研究野外站联盟
  • 中国科学院水生生物研究所分析测试中心
  • 中国科学院超级计算武汉分中心
  • 水生生物博物馆
== 相关网站推荐 ==
  • == 相关网站推荐 ==
  • 中国科学院
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  • 科学技术部
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  • 国家自然科学基金委员会
  • 中国科学院武汉分院
  • 湖北省科学技术厅
  • 湖北省生态环境厅
  • 湖北省农业农村厅