חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Successional biocrust stages on dead shrub soil mounds after severe drought: Effect of micro-geomorphology on microbial community structure and ecosystem recovery
Year:
2016
Source of publication :
Soil Biology and Biochemistry
Authors :
צעדי, אלי
;
.
Volume :
103
Co-Authors:
Nejidat, A., Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
Potrafka, R.M., School of Life Sciences, Arizona State University, Tempe, AZ, United States
Zaady, E., Department of Natural Resources and Agronomy, Gilat Research Center, Agriculture Research Organization, Mobile Post Negev, Israel
Facilitators :
From page:
213
To page:
220
(
Total pages:
8
)
Abstract:
A drought- induced massive shrub death event was observed in a semi-arid region of the Negev Desert, leaving bare soil mounds in place. Hypothesizing that the absence of shrubs would allow biocrust expansion to cover the bare soil mounds, we followed the development of biocrusts on the south and north-facing slopes of the soil mounds over three years. Only after six years, when the mounds were totally flattened, were the water infiltration capacity and soil compaction properties of the developing biocrusts similar to those of the surrounding mature biocrusts. The prokaryotic community structure was exposed by pyrosequencing of 16S rRNA gene amplicons. A principal component analysis indicated that the development of microbial community on the soil mounds was affected at multiple scales, including biocrust successional stage, seasonal effect and the micro-geomorphology of the mound (north vs. south slopes). While the phototroph community structure was most associated with the biocrust successional stage, the heterotroph community structure was mostly season-associated. Compared to the north slope, the south slope exhibited delayed development in all determined parameters; with the addition of lately observed establishment of new shrubs in this site, the results emphasize the importance of the micro-geomorphology in the recovery of the affected ecosystem. © 2016
Note:
Related Files :
climate change
drought
Ecology
ecosystems
Geomorphology
Landforms
microorganisms
RNA
Soils
עוד תגיות
תוכן קשור
More details
DOI :
10.1016/j.soilbio.2016.08.028
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
24708
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:09
Scientific Publication
Successional biocrust stages on dead shrub soil mounds after severe drought: Effect of micro-geomorphology on microbial community structure and ecosystem recovery
103
Nejidat, A., Department of Environmental Hydrology and Microbiology, Zuckerberg Institute for Water Research, The Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer Campus, Midreshet Ben-Gurion, Israel
Potrafka, R.M., School of Life Sciences, Arizona State University, Tempe, AZ, United States
Zaady, E., Department of Natural Resources and Agronomy, Gilat Research Center, Agriculture Research Organization, Mobile Post Negev, Israel
Successional biocrust stages on dead shrub soil mounds after severe drought: Effect of micro-geomorphology on microbial community structure and ecosystem recovery
A drought- induced massive shrub death event was observed in a semi-arid region of the Negev Desert, leaving bare soil mounds in place. Hypothesizing that the absence of shrubs would allow biocrust expansion to cover the bare soil mounds, we followed the development of biocrusts on the south and north-facing slopes of the soil mounds over three years. Only after six years, when the mounds were totally flattened, were the water infiltration capacity and soil compaction properties of the developing biocrusts similar to those of the surrounding mature biocrusts. The prokaryotic community structure was exposed by pyrosequencing of 16S rRNA gene amplicons. A principal component analysis indicated that the development of microbial community on the soil mounds was affected at multiple scales, including biocrust successional stage, seasonal effect and the micro-geomorphology of the mound (north vs. south slopes). While the phototroph community structure was most associated with the biocrust successional stage, the heterotroph community structure was mostly season-associated. Compared to the north slope, the south slope exhibited delayed development in all determined parameters; with the addition of lately observed establishment of new shrubs in this site, the results emphasize the importance of the micro-geomorphology in the recovery of the affected ecosystem. © 2016
Scientific Publication
נגישות
menu      
You may also be interested in