Biocrust diversity enhances dryland saline soil multifunctionality

Kakeh, Jalil and Sanaei, Anvar and Sayer, Emma J. and Hazhir, Shadi and Gorji, Manouchehr and Mohammadi, Mohammad Hossein (2023) Biocrust diversity enhances dryland saline soil multifunctionality. Land Degradation and Development, 34 (2). pp. 521-533. ISSN 1085-3278

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Biocrusts are multifaceted communities including mosses, lichens, and cyanobacteria that are crucial for sustaining soil functions in drylands. Most studies on biocrust functions to date have focused on biocrust cover and development, largely in non-saline soils, and we know very little about the importance of biocrust diversity for maintaining multifunctionality in saline dryland soils. We assessed the direct and indirect linkages between biocrust richness, soil texture and salinity and soil multifunctionality by measuring 13 variables characterizing soil biological, nutrient and hydrological functions across 32 plots in a salinized dryland in northeastern Iran. We assessed the species richness of biocrust patches and characterized soil functions in bare soils. Overall, biocrust species richness declined with soil clay content and soil salinity, whereas soil salinity increased with soil clay content. Structural equation modelling showed a strong positive association between biocrust species richness and all measured dryland soil functions (soil biological, nutrient and hydrological functions), but soil hydrological function declined with soil salinity. Overall, dryland soil multifunctionality was positively associated with biocrust species richness but negatively associated with soil clay content. Biocrust species richness likely enhances soil multifunctionality via the distinct roles of species and biocrust functional groups in providing carbon and nutrient inputs, creating favorable microsites, enhancing infiltration, and facilitating soil microbial colonization in saline dryland soils. Overall, our findings highlight a key role for biocrust diversity in facilitating and maintaining soil multifunctionality in drylands affected by soil salinity.

Item Type:
Journal Article
Journal or Publication Title:
Land Degradation and Development
Additional Information:
This is the peer reviewed version of the following article: Jalil Kakeh, Anvar Sanaei, Emma J. Sayer, Shadi Hazhir, Manouchehr Gorji, Mohammad Hossein Mohammadi (2022 Biocrust diversity enhances dryland saline soil multifunctionality. Land Degradation and Development. doi: 10.1002/ldr.4476 which has been published in final form at . This article may be used for non-commercial purposes in accordance With Wiley Terms and Conditions for self-archiving.
Uncontrolled Keywords:
?? soil sciencegeneral environmental sciencedevelopmentenvironmental chemistryenvironmental science(all)developmentenvironmental chemistrysoil science ??
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Deposited On:
05 Oct 2022 09:25
Last Modified:
14 Feb 2024 01:36