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Infiltration through three contrasting biological soil crusts in patterned landscapes in the Negev, Israel
Year:
2000
Source of publication :
Catena
Authors :
Zaady, Eli
;
.
Volume :
40
Co-Authors:
Eldridge, D.J., Dept. of Land and Water Conservation, Ctr. Nat. Rsrc., C/- Sch. Geogr., U., Sydney, NSW 2052, Australia
Zaady, E.
Shachak, M.
Facilitators :
From page:
323
To page:
336
(
Total pages:
14
)
Abstract:
We examined the role of soil crusts in infiltration processes in three contrasting environments in the Northern, Central, and Central-Western Negev, Israel. The removal of a thin cyanobacterial-dominant crust from a sandy dune at Nizzana in the Central-Western Negev and of a well-developed lichen-dominant and a cyanobacterial-dominant crust from a loess-covered hillslope at Sayeret Shaked in the Northern Negev resulted in three to fivefold increases in sorptivity and steady-state infiltration under both ponding and tension. The removal of a depositional crust colonised by cyanobacteria from a loess floodplain at Sede Zin in the Central Negev resulted in an increased infiltration under tension, but had no significant effect under ponding. We attribute the lack of effect under ponding to exposure of surface silts to water, which resulted in the clogging of matrix pores and surface sealing. The removal of the crusts in all three landscapes influences resource flows, particularly the redistribution of runoff water, which is essential for the maintenance of desert soil surface patterning. It would also have marked effects on germination, establishment and survival of vascular plants and soil biota, leading ultimately to desertification. (C) 2000 Elsevier Science B.V.
Note:
Related Files :
desertification
Israel
Microbiotic crust
Microphytic crust
Negev desert
Soil crust
Soil crusting
Soil patterning
Vegetation patchiness
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Related Content
More details
DOI :
10.1016/S0341-8162(00)00082-5
Article number:
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
19478
Last updated date:
02/03/2022 17:27
Creation date:
16/04/2018 23:29
Scientific Publication
Infiltration through three contrasting biological soil crusts in patterned landscapes in the Negev, Israel
40
Eldridge, D.J., Dept. of Land and Water Conservation, Ctr. Nat. Rsrc., C/- Sch. Geogr., U., Sydney, NSW 2052, Australia
Zaady, E.
Shachak, M.
Infiltration through three contrasting biological soil crusts in patterned landscapes in the Negev, Israel
We examined the role of soil crusts in infiltration processes in three contrasting environments in the Northern, Central, and Central-Western Negev, Israel. The removal of a thin cyanobacterial-dominant crust from a sandy dune at Nizzana in the Central-Western Negev and of a well-developed lichen-dominant and a cyanobacterial-dominant crust from a loess-covered hillslope at Sayeret Shaked in the Northern Negev resulted in three to fivefold increases in sorptivity and steady-state infiltration under both ponding and tension. The removal of a depositional crust colonised by cyanobacteria from a loess floodplain at Sede Zin in the Central Negev resulted in an increased infiltration under tension, but had no significant effect under ponding. We attribute the lack of effect under ponding to exposure of surface silts to water, which resulted in the clogging of matrix pores and surface sealing. The removal of the crusts in all three landscapes influences resource flows, particularly the redistribution of runoff water, which is essential for the maintenance of desert soil surface patterning. It would also have marked effects on germination, establishment and survival of vascular plants and soil biota, leading ultimately to desertification. (C) 2000 Elsevier Science B.V.
Scientific Publication
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