Microbial secreted exopolysaccharides affect the hydrological behavior of induced biological soil crusts in desert sandy soils

Colica, Giovanni; Li, Hua; Rossi, Federico; Li, Dunhai; Liu, Yongding; Philippis, Roberto De

doi:10.1016/j.soilbio.2013.09.017

Cited by 187 publications

(125 citation statements)

References 51 publications

Supporting

Mentioning

114

Contrasting

Unclassified

Order By: Relevance

“…However, while C-EPSs are more dispersed in the soil and thus more easily degradable by the microflora, TBEPSs bind tightly to the soil particles, and are characterized by EPS at high MW. This fraction most probably plays a key role in giving a structural stability to the crusts and in affecting the hydrological behavior of the soil covered by IBSCs, as previously suggested (Colica et al, 2014).…”

Section: Discussionsupporting

confidence: 54%

“…In all the experimental sites, the desert is characterized by a mass of dunes with an average height of 5 m above the ground and the soil is constituted by bare sand carried by the wind from the desert area between the towns of Urad Qianqi and Dengkou (Inner Mongolia, China) (Colica et al, 2014). In this case study, the physicochemical characteristics of the soils, classified as sandy soils by Lan et al (2010), are the same in all the investigated sites.…”

Section: Study Area and Cyanobacterial Crust Inductionmentioning

confidence: 98%

“…Beside their ecological role in BSCs, recently thoroughly documented by Mager and Thomas (2011), EPSs represent a huge carbon source which can be exploited by residing microorganisms and colonizing plants and give an important contribution to the hydrological behavior of the crusts (Rossi et al, 2012b;Colica et al, 2014). In some cases, the amount of these substances was reckoned to represent up to 500% of the cell biomass (Chenu, 1993).…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages

Chen

Rossi

Deng

et al. 2014

Soil Biology and Biochemistry

Self Cite

View full text Add to dashboard Cite

Section: Discussionsupporting

confidence: 54%

Section: Study Area and Cyanobacterial Crust Inductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages

Chen

Rossi

Deng

et al. 2014

Soil Biology and Biochemistry

Self Cite

View full text Add to dashboard Cite

“…Especially in arid or semi-arid environments, the role of EPSs secreted by Cyanobacteria is crucial for microbial communities surviving within (and below) biocrusts (De Philippis and Vincenzini, 1998;Pereira et al, 2009;Mager and Thomas, 2011;Rossi et al, 2012;Colica et al, 2014;Rossi and De Philippis, 2015). The synthesis of EPSs contributes to the stability of soil structure and hydrated microenvironments in soil, making it a key ingredient of biocrust formation.…”

Section: Microbial Eps Productionmentioning

confidence: 99%

Hydration status and diurnal trophic interactions shape microbial community function in desert biocrusts

Kim

2017

Biogeosciences

View full text Add to dashboard Cite

Abstract. Biological soil crusts (biocrusts) are selforganised thin assemblies of microbes, lichens, and mosses that are ubiquitous in arid regions and serve as important ecological and biogeochemical hotspots. Biocrust ecological function is intricately shaped by strong gradients of water, light, oxygen, and dynamics in the abundance and spatial organisation of the microbial community within a few millimetres of the soil surface. We report a mechanistic model that links the biophysical and chemical processes that shape the functioning of biocrust representative microbial communities that interact trophically and respond dynamically to cycles of hydration, light, and temperature. The model captures key features of carbon and nitrogen cycling within biocrusts, such as microbial activity and distribution (during early stages of biocrust establishment) under diurnal cycles and the associated dynamics of biogeochemical fluxes at different hydration conditions. The study offers new insights into the highly dynamic and localised processes performed by microbial communities within thin desert biocrusts.

show abstract

“…Chen et al, 2014;Colica et al, 2014;Fischer et al, 2010;Katznelson, 1989;Kidron et al, 1999;Malam Issa et al, 2009;Mazor et al, 1996;Rossi et al, 2012) was mentioned as one reason for the decreasing infiltration and higher water repellency. However, cyanobacteria always dominated the crusts studied there.…”

Section: Water Repellency and Infiltrationmentioning

confidence: 99%

Infiltration and water retention of biological soil crusts on reclaimed soils of former open-cast lignite mining sites in Brandenburg, north-east Germany

Gypser

Veste

Fischer

et al. 2016

Journal of Hydrology and Hydromechanics

View full text Add to dashboard Cite

Investigations were done on two former open-cast lignite mining sites under reclamation, an artificial sand dune in Welzow Süd, and a forest plantation in Schlabendorf Süd (Brandenburg, Germany). The aim was to associate the topsoil hydrological characteristics of green algae dominated as well as moss and soil lichen dominated biological soil crusts during crustal succession with their water retention and the repellency index on sandy soils under temperate climate and different reliefs.The investigation of the repellency index showed on the one hand an increase due to the cross-linking of sand particles by green algae which resulted in clogging of pores. On the other hand, the occurrence of moss plants led to a decrease of the repellency index due to absorption caused by bryophytes. The determination of the water retention curves showed an increase of the water holding capacity, especially in conjunction with the growth of green algae layer. The pore-related van Genuchten parameter indicate a clay-like behaviour of the developed soil crusts. Because of the inhomogeneous distribution of lichens and mosses as well as the varying thickness of green algae layers, the water retention differed between the study sites and between samples of similar developmental stages. However, similar tendencies of water retention and water repellency related to the soil crust formation were observed.Biological soil crusts should be considered after disturbances in the context of reclamation measures, because the initial development of green algae biocrusts lead to an increasing repellency index, while the occurrence of mosses and a gain in organic matter enhance the water holding capacity. Thus, the succession of biocrusts and their small-scale succession promote the development of soil and ecosystem.

show abstract

Microbial secreted exopolysaccharides affect the hydrological behavior of induced biological soil crusts in desert sandy soils

Cited by 187 publications

References 51 publications

Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages

Macromolecular and chemical features of the excreted extracellular polysaccharides in induced biological soil crusts of different ages

Hydration status and diurnal trophic interactions shape microbial community function in desert biocrusts

Infiltration and water retention of biological soil crusts on reclaimed soils of former open-cast lignite mining sites in Brandenburg, north-east Germany

Contact Info

Product

Resources

About