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Cyanobacteria and loess-an underestimated interaction

Titelangaben

Svirčev, Zorica ; Dulić, Tamara ; Obreht, Igor ; Codd, Geoffrey A. ; Lehmkuhl, Frank ; Marković, Slobodan B. ; Hambach, Ulrich ; Meriluoto, Jussi:
Cyanobacteria and loess-an underestimated interaction.
In: Plant and Soil. Bd. 439 (2019) Heft 1-2 . - S. 293-308.
ISSN 1573-5036
DOI: https://doi.org/10.1007/s11104-019-04048-3

Volltext

Link zum Volltext (externe URL): Volltext

Abstract

Background
Biocrusts are important functional units in dryland ecosystems. Regarded as ecosystem engineers, cyanobacteria in biocrusts contribute several major physico-chemical and biological processes. However, the role of cyanobacteria in the process of loess formation has been underestimated. Recently, their contribution to sediment development was presented in the BLOCDUST model of loess formation.
Scope
This perspective paper features the environmental impact of cyanobacteria and biocrusts with a focus on processes involved in the formation of loess sediments. We propose that the formation of loess can be mediated by cyanobacteria, including initial trapping, and the accumulation and preservation of loess-forming particles. Moreover, the initial structure may be further altered by weak mineral weathering, dissolution and mineral re-precipitation due to cyanobacterial metabolic processes. Possible negative aspects of environmental impact related to the potential toxicity of cyanobacterial biocrusts are also discussed. We highlight specific biotic-abiotic interactions between biocrusts and loess (e.g. exudation of organic polymers, carbonate dissolution and re-precipitation, and dust-dependent metabolic activities of cyanobacteria) which are essential for the formation of stabilized loess and propose the term “synergosis” to comprise these interactions.
Conclusion
The role of cyanobacteria in loess formation has only recently been recognized and the possible biogenic nature of loessification is underestimated as compared to their eolian nature. Mineral weathering and mineral precipitation processes as well as mineral dust flux between litho- and atmosphere mediated by cyanobacteria and biocrusts require more attention due to their significant contribution to ecosystem properties.

Weitere Angaben

Publikationsform: Artikel in einer Zeitschrift
Begutachteter Beitrag: Ja
Keywords: Biocrusts; Cyanobacteria; Loess; BLOCDUST; Organominerals; Synergosis
Institutionen der Universität: Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften
Fakultäten > Fakultät für Biologie, Chemie und Geowissenschaften > Fachgruppe Geowissenschaften > Lehrstuhl Geomorphologie
Profilfelder > Advanced Fields > Ökologie und Umweltwissenschaften
Profilfelder > Advanced Fields > Nichtlineare Dynamik
Forschungseinrichtungen > Forschungszentren > Bayreuther Zentrum für Ökologie und Umweltforschung - BayCEER
Fakultäten
Profilfelder
Profilfelder > Advanced Fields
Forschungseinrichtungen
Forschungseinrichtungen > Forschungszentren
Titel an der UBT entstanden: Ja
Themengebiete aus DDC: 500 Naturwissenschaften und Mathematik > 550 Geowissenschaften, Geologie
500 Naturwissenschaften und Mathematik > 570 Biowissenschaften; Biologie
Eingestellt am: 09 Dec 2019 09:58
Letzte Änderung: 31 Aug 2022 11:00
URI: https://eref.uni-bayreuth.de/id/eprint/53519