Lichens Bite the Dust - A Bioweathering Scenario in the Atacama Desert

被引：14

作者：

Jung, Patrick ^{[1
]}

Baumann, Karen ^{[2
]}

Emrich, Dina ^{[3
]}

Springer, Armin ^{[4
,5
]}

Felde, Vincent J. M. N. L. ^{[6
]}

Dultz, Stefan ^{[7
]}

Baum, Christel ^{[2
]}

Frank, Marcus ^{[4
,5
]}

Buedel, Burkhard ^{[8
]}

Leinweber, Peter ^{[2
]}

机构：

[1] Univ Appl Sci Kaiserslautern, Appl Logist & Polymer Sci, Carl Schurz Str 10-16, D-66953 Pirmasens, Germany

[2] Univ Rostock, Fac Agr & Environm Sci Soil Sci, Justus von Liebig Weg 6, D-18051 Rostock, Germany

[3] Univ Freiburg, Fac Environm & Nat Resources, Chair Appl Vegetat Ecol, Tennenbacher Str 4, D-79106 Freiburg, Germany

[4] Univ Med Rostock, Med Biol & Electron Microscopy Ctr, Strempelstr 14, D-18057 Rostock, Germany

[5] Univ Rostock, Dept Life Light & Matter, D-18051 Rostock, Germany

[6] Univ Kassel, Fac Organ Agr Sci, Dept Soil Sci, Nordbahnhofstr 1a, D-37213 Witzenhausen, Germany

[7] Leibniz Univ Hannover, Inst Soil Sci, Herrenhauser Str 2, D-30419 Hannover, Germany

[8] Univ Kaiserslautern, Plant Ecol & Systemat, Erwin Schrodinger Str, D-67663 Kaiserslautern, Germany

来源：

ISCIENCE | 2020年 / 23卷 / 11期

关键词：

Biogeoscience; Earth sciences; Earth-Surface Processes; Geomicrobiology; Weathering;

D O I：

10.1016/j.isci.2020.101647

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Bioweathering mediated by microorganisms plays a significant role in biogeochemical cycles on global scales over geological timescales. Single processes induced by specific taxa have been described but could rarely be demonstrated for complex communities that dominate whole landscapes. The recently discovered grit crust of the coastal Atacama Desert, which is a transitional community between a cryptogamic ground cover and a rock-bound lithic assemblage, offers the unique chance to elucidate various bioweathering processes that occur simultaneously. Here, we present a bioweathering scenario of this biocenosis including processes such as penetration of the lithomatrix, microbial responses to wet-dry cycles, alkalinolysis, enzyme activity, and mineral re-localization. Frequently occurring fog, for example, led to a volume increase of microorganisms and the lithomatrix. This, together with pH shifts and dust accumulation, consequently results in biophysical breakdown and the formation of a terrestrial protopedon, an initial stage of pedogenesis fueled by the grit crust.

引用

页数：28

共 56 条

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