Knowledge Resource Center for Ecological Environment in Arid Area
DOI | 10.1002/ldr.4146 |
Biocrust-induced extracellular polymeric substances are responsible for dune stabilization in the Negev | |
Kidron, Giora J.![]() | |
通讯作者 | Kidron, GJ (corresponding author), Hebrew Univ Jerusalem, Inst Earth Sci, Givat Ram Campus, IL-91904 Jerusalem, Israel. |
来源期刊 | LAND DEGRADATION & DEVELOPMENT
![]() |
ISSN | 1085-3278 |
EISSN | 1099-145X |
出版年 | 2022 |
英文摘要 | There is no consensus over the factors responsible for dune stabilization in arid regions, with some scholars maintaining that dust (i.e., silt and clay) plays a major role in dune stabilization. Aiming to explore the principal driving factor responsible for dune stabilization in the Negev, we compared various biocrusts having different biomass and compressive strength, and performed surface degradation and illuviation experiments with dust in the presence or absence of biocrusts in order to assess the crust role in impeding wind erosion and dust illuviation. We show that dust cannot be regarded as the primary driving factor for crust strength and subsequently for dune stabilization in the Negev, as suggested in some publications. This function is however fulfilled by extracellular polymeric substances (EPS, mostly polysaccharides), which are excreted by the biocrust (mainly cyanobacteria), and serve as a cementing agent for the establishing crust and therefore for the dust. Exhibiting high water absorption and strong adhering properties, EPS is responsible for granting strength to the crust, impeding wind erosion and dust illuviation, thus providing the necessary cementing agent, which facilitates dune stabilization in the Negev. Global warming which may result in frequent droughts and high input of dust may not contribute to dune stabilization as suggested by some scholars, but rather will negatively affect dune stabilization, as it may result in EPS degradation and subsequently in dune mobilization. |
英文关键词 | compressive strength dust exopolysaccharides illuviation experiment pedogenesis penetration resistance |
类型 | Article |
语种 | 英语 |
收录类别 | SCI-E |
WOS记录号 | WOS:000735203600001 |
WOS关键词 | BIOLOGICAL SOIL CRUSTS ; INDUCED SEDIMENT YIELD ; WESTERN NEGEV ; MICROBIOTIC CRUSTS ; SANDY SOILS ; CYANOBACTERIAL EXOPOLYSACCHARIDES ; TENGGER DESERT ; CLIMATE-CHANGE ; WIND EROSION ; SURFACES |
WOS类目 | Environmental Sciences ; Soil Science |
WOS研究方向 | Environmental Sciences & Ecology ; Agriculture |
资源类型 | 期刊论文 |
条目标识符 | http://119.78.100.177/qdio/handle/2XILL650/374758 |
作者单位 | [Kidron, Giora J.] Hebrew Univ Jerusalem, Inst Earth Sci, Givat Ram Campus, IL-91904 Jerusalem, Israel; [Drahorad, Sylvie L.] Justus Liebig Univ Giessen, IFZ, Inst Phys Chem, Giessen, Germany; [Drahorad, Sylvie L.] Justus Liebig Univ Giessen, IFZ, Inst Soil Sci & Soil Conservat, Giessen, Germany |
推荐引用方式 GB/T 7714 | Kidron, Giora J.,Drahorad, Sylvie L.. Biocrust-induced extracellular polymeric substances are responsible for dune stabilization in the Negev[J],2022. |
APA | Kidron, Giora J.,&Drahorad, Sylvie L..(2022).Biocrust-induced extracellular polymeric substances are responsible for dune stabilization in the Negev.LAND DEGRADATION & DEVELOPMENT. |
MLA | Kidron, Giora J.,et al."Biocrust-induced extracellular polymeric substances are responsible for dune stabilization in the Negev".LAND DEGRADATION & DEVELOPMENT (2022). |
条目包含的文件 | 条目无相关文件。 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。