Article (Scientific journals)
Effect of water availability on induced cyanobacterial biocrust development
Román, JR; Roncero Ramos, Beatriz; Rodríguez-Caballero, Emilio et al.
2021In Catena, 197
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Keywords :
Semiarid; Biocrust restoration; Exopolysaccharides; Soil organic carbon; Cyanobacteria inoculation; Water availability
Abstract :
[en] Cyanobacteria inoculation has recently become an innovative biotechnological tool for restoring degraded arid soils. A major challenge for researchers, however, is the search for suitable species able to cope with water stress under field conditions. The aim of this study was to test the effect of water availability on induced biocrust growth in three different degraded soils from semiarid areas of Almeria (Spain). Three native N-fixing cyano-bacterial strains, Nostoc commune, Scytonema hyalinum and Tolypothrix distorta, were inoculated on soil samples from the study areas, individually and as a consortium. Two different irrigation treatments simulating the water availability in the selected areas, in a dry year (180 mm/year) and a wet year (380 mm/year), were applied for three months under laboratory conditions. Cyanobacteria cover, chlorophyll a spectral absorption (Chla spectral absorption), soil organic carbon (SOC) and total exopolysaccharide (EPS) gains were measured as indicators of biocrust development. Cyanobacteria crust cover, SOC and EPS gains were higher in inoculated soils than in uninoculated soils. Even though the hydration regime had a generally significant effect on cyanobacteria cover, Chla spectral absorption and EPS, similar biocrust development and improvement in edaphic conditions were observed under both hydration regimes for all treatments. Of the candidate inoculants, N. commune showed remarkably higher performance under dry conditions than the rest, providing evidence of high potential for growing under water-limited conditions and being a good candidate inoculant for restoration of arid degraded areas.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Román, JR;  University of Almería > Agronomy
Roncero Ramos, Beatriz ;  Université de Liège - ULiège > Département des sciences de la vie > Centre d'ingénierie des protéines
Rodríguez-Caballero, Emilio;  University of Almería > Agronomy
Chamizo, S;  University of Almería > Agronomy
Cantón, Y;  University of Almería > Agronomy
Language :
English
Title :
Effect of water availability on induced cyanobacterial biocrust development
Publication date :
2021
Journal title :
Catena
ISSN :
0341-8162
eISSN :
1872-6887
Publisher :
Elsevier, Netherlands
Volume :
197
Peer reviewed :
Peer Reviewed verified by ORBi
Name of the research project :
RESUCI project (CGL2014-59946-R); REBIOARID project (RTI2018-101921-B-I00); Spanish National Plan for Research; RH2O-ARID (P18-RT-5130); FPU predoctoral fellowship (FPU14/05806); Special Funds for Research, IPD-STEMA Programme; HIPATIA-UAL postdoctoral fellowship
Funders :
UE - Union Européenne [BE]
FEDER - Fonds Européen de Développement Régional [BE]
Junta de Andalucía [ES]
Educational, Culture and Sports Ministry of Spain
ULiège - Université de Liège [BE]
University of Almería
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