Biochar Coupled Rehabilitation of Cyanobacterial Soil Crusts: A Sustainable Approach in Stabilization of Arid and Semiarid Soils

2020 ◽  
pp. 167-191
Author(s):  
Arun Kumar ◽  
Jay Shankar Singh
Keyword(s):  
Soil Crusts ◽  
Semiarid Soils ◽  
Arid And Semiarid

scholarly journals Dynamics of organic carbon losses by water erosion after biocrust removal

2014 ◽  
Vol 62 (4) ◽  
pp. 258-268 ◽  
Author(s):  
Yolanda Cantón ◽  
Jose Raúl Román ◽  
Sonia Chamizo ◽  
Emilio Rodríguez-Caballero ◽  
María José Moro
Keyword(s):  
Organic Carbon ◽  
Fine Particles ◽  
Water Erosion ◽  
Strong Increase ◽  
Runoff Water ◽  
Erosion Rates ◽  
Soil Crusts ◽  
C Balance ◽  
Carbon Losses ◽  
Arid And Semiarid

Abstract In arid and semiarid ecosystems, plant interspaces are frequently covered by communities of cyanobacteria, algae, lichens and mosses, known as biocrusts. These crusts often act as runoff sources and are involved in soil stabilization and fertility, as they prevent erosion by water and wind, fix atmospheric C and N and contribute large amounts of C to soil. Their contribution to the C balance as photosynthetically active surfaces in arid and semiarid regions is receiving growing attention. However, very few studies have explicitly evaluated their contribution to organic carbon (OC) lost from runoff and erosion, which is necessary to ascertain the role of biocrusts in the ecosystem C balance. Furthermore, biocrusts are not resilient to physical disturbances, which generally cause the loss of the biocrust and thus, an increase in runoff and erosion, dust emissions, and sediment and nutrient losses. The aim of this study was to find out the influence of biocrusts and their removal on dissolved and sediment organic carbon losses. One-hour extreme rainfall simulations (50 mm h-1) were performed on small plots set up on physical soil crusts and three types of biocrusts, representing a development gradient, and also on plots where these crusts were removed from. Runoff and erosion rates, dissolved organic carbon (DOC) and organic carbon bonded to sediments (SdOC) were measured during the simulated rain. Our results showed different SdOC and DOC for the different biocrusts and also that the presence of biocrusts substantially decreased total organic carbon (TOC) (average 1.80±1.86 g m-2) compared to physical soil crusts (7.83±3.27 g m-2). Within biocrusts, TOC losses decreased as biocrusts developed, and erosion rates were lower. Thus, erosion drove TOC losses while no significant direct relationships were found between TOC losses and runoff. In both physical crusts and biocrusts, DOC and SdOC concentrations were higher during the first minutes after runoff began and decreased over time as nutrient-enriched fine particles were washed away by runoff water. Crust removal caused a strong increase in water erosion and TOC losses. The strongest impacts on TOC losses after crust removal occurred on the lichen plots, due to the increased erosion when they were removed. DOC concentration was higher in biocrust-removed soils than in intact biocrusts, probably because OC is more strongly retained by BSC structures, but easily blown away in soils devoid of them. However, SdOC concentration was higher in intact than removed biocrusts associated with greater OC content in the top crust than in the soil once the crust is scraped off. Consequently, the loss of biocrusts leads to OC impoverishment of nutrient-limited interplant spaces in arid and semiarid areas and the reduction of soil OC heterogeneity, essential for vegetation productivity and functioning of this type of ecosystems.

Distribution patterns of Dikarya in arid and semiarid soils of Baja California, Mexico

2013 ◽  
Vol 6 (1) ◽  
pp. 92-101 ◽  
Author(s):  
Adriana L. Romero-Olivares ◽  
Raúl C. Baptista-Rosas ◽  
Ana E. Escalante ◽  
Stephen H. Bullock ◽  
Meritxell Riquelme
Keyword(s):  
Baja California ◽  
Distribution Patterns ◽  
Semiarid Soils ◽  
Arid And Semiarid

scholarly journals Variations in the coverage of biological soil crusts along a gradient of aridity in the center-west of argentina

2019 ◽  
Author(s):  
A.L Navas Romero ◽  
M.A. Herrera Moratta ◽  
B. Vento ◽  
R.A. Rodriguez ◽  
E.E. Martínez Carretero
Keyword(s):  
Environmental Factors ◽  
Strong Relationship ◽  
Biological Soil Crusts ◽  
The Other ◽  
Soil Crusts ◽  
Quadrat Method ◽  
Semiarid Areas ◽  
Arid And Semiarid Areas ◽  
Point Quadrat ◽  
Arid And Semiarid

AbstractThe biological soil crusts (biocrust) play a fundamental role in the arid and semiarid areas of South America. However, little attention has been paid to the distribution and coverage of them. In Argentina, studies about biocrust are still scarce. The goal of this contribution is to analyze the coverage of the biocrust and each of the functional component along a gradient of aridity in the center-west of Argentina. The gradient included three differentiated sites: semiarid, arid, and hyperarid sites. The coverage was recorded using the Point-quadrat method on 30 transects through a gradient consisting of three sites: semiarid, arid, and hyper-arid sites. The arid site was the system with the highest coverage of biocrust followed by the hyper-arid site. The semiarid site had the lowest values of coverage and showed significant differences among the three systems were found. Cyanobacteria’s dominate in the hyper-arid site. On the other hand, cyanobacteria and lichens were dominant in the arid site. The coverage of studied organisms showed variations in the semiarid site. These results support the idea that the coverage has a strong relationship with the features of the studied ecosystem and the environmental factors both at a mesoscale and a microscale in a determined community.

Nitrogen Mineralization Potential of Arid and Semiarid Soils of Morocco

1990 ◽  
Vol 54 (2) ◽  
pp. 438-443 ◽  
Author(s):  
M. El Gharous ◽  
R. L. Westerman ◽  
P. N. Soltanpour
Keyword(s):  
Nitrogen Mineralization ◽  
Mineralization Potential ◽  
Semiarid Soils ◽  
Arid And Semiarid

scholarly journals New isolation method of desiccation-tolerant microorganisms for the bioremediation of arid and semiarid soils

2010 ◽  
Author(s):  
M. Manzanera ◽  
J. J. Narváez-Reinaldo ◽  
L. SantaCruz-Calvo ◽  
J. I. Vílchez ◽  
J. González-López ◽  
...  
Keyword(s):  
Isolation Method ◽  
Semiarid Soils ◽  
Arid And Semiarid
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