极地研究

极地研究 ›› 1999, Vol. 10 ›› Issue (1-English): 25-32.

• 目次 • 上一篇    下一篇

Biotic weathering of rocks by lichens in Antarctica

 Chen Jie1 and Hans-Peter Blume2   

  1. 1 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2 Institute of Plant Nutrition and Soil Science, University of Kiel, D-24098 Kiel, Germany
  • 出版日期:1949-03-30 发布日期:1949-03-30
  • 通讯作者: Chen Jie

Biotic weathering of rocks by lichens in Antarctica

 Chen Jie1 and Hans-Peter Blume2   

  1. 1 Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China;
    2 Institute of Plant Nutrition and Soil Science, University of Kiel, D-24098 Kiel, Germany
  • Online:1949-03-30 Published:1949-03-30
  • Contact: Chen Jie

PDF (PC)

1322

摘要：

Weathering process of rocks in Antarctica can be accelerated by the colonization of lichens, which dominate surface vegetation and endolithic communities respectively in the maritime Antarctic and in Antarctic cold deserts. The effects of lichens on their substrate rocks can be attributed to both physical and chemical causes. As the result of the weathering induced by lichens, the surface corrosion and exfoliation of colonized rocks occur. The mobilization of iron in the rock forming minerals and the precipitation of poorly ordered iron oxides are investigated. Furthermore, the neoformation of crystalline metal oxalates and secondary clay minerals are identified in the colonized rocks. Due to unique climatic conditions, the biotic weathering process of rocks in Antarctica somewhat differs from that of other regions of the world.

关键词: Antarctica, lichens, weathering, epilithic, endolithic

Abstract:

Weathering process of rocks in Antarctica can be accelerated by the colonization of lichens, which dominate surface vegetation and endolithic communities respectively in the maritime Antarctic and in Antarctic cold deserts. The effects of lichens on their substrate rocks can be attributed to both physical and chemical causes. As the result of the weathering induced by lichens, the surface corrosion and exfoliation of colonized rocks occur. The mobilization of iron in the rock forming minerals and the precipitation of poorly ordered iron oxides are investigated. Furthermore, the neoformation of crystalline metal oxalates and secondary clay minerals are identified in the colonized rocks. Due to unique climatic conditions, the biotic weathering process of rocks in Antarctica somewhat differs from that of other regions of the world.

Key words: Antarctica, lichens, weathering, epilithic, endolithic