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אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
Man as A Super-Engineer in Semiarid Ecosystems: Past Evidence and Future Role - Absrtact
Year:
2008
Source of publication :
Authors :
אונגר, יוג'ין דוד
;
.
פרבולוצקי, אבי
;
.
Volume :
Co-Authors:
Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:
The natural vegetation of the semiarid Northern Negev region of Israel has been considerably impacted by grazing, cultivation and shrub cutting. Herding of small livestock and grain farming have been practiced for millennia. Till the 1950's, humans controlled shrub cover by harvesting it for energy for households and small industry. Recent comparisons have indicated that there is a qualitative difference between the Old and New Worlds in their resilience to grazing. According to this view, systems with millennia of grazing history are more robust when subjected to traditional patterns of heavy pastoralism. These ideas are discussed in the light of 20 years of research conducted at the Lehavim LTER site in the Northern Negev. Since its establishment, a slow increase in shrub cover (primarily Sarcopoterium spinosum) has been observed at this site. Grazing exclosures tended to exhibit enhanced shrub cover, supporting the claim that grazing is not the cause of "shrub desertification" but is a means of controlling it. The herbaceous productivity varied primarily in response to habitat and climate; no long-term trends in productivity have been detected. It seems that the herbaceous vegetation is well adapted to unpredictable rainfall and high grazing intensity. The diversity of annual plants is determined by the interaction between grazing and small-scale spatial and temporal variation in primary productivity. Shrubs act as a refuge for herbaceous species that are grazing sensitive. Scientific attitudes towards shrub vegetation and grazing animals have become less negative over recent decades. In the most progressive viewpoint, both types of organism are viewed as ecosystem engineers that can promote landscape heterogeneity and the preservation of resources at the hillside scale. Man's challenge is to understand this complex system and play the role of the super-engineer that managed the natural engineers to promote the long-term sustainability of the rangeland resource.
 
.
 
Note:
Related Files :
Grazing
Herbaceous vegetation
livestock animals
Rangeland management
Sarcopoterium spinosum
shrub
Vegetation
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
0
Affiliations:
Database:
גוגל סקולר
Publication Type:
תקציר
;
.
Language:
אנגלית
Editors' remarks:
ID:
37172
Last updated date:
02/03/2022 17:27
Creation date:
06/09/2018 12:44
Scientific Publication
Man as A Super-Engineer in Semiarid Ecosystems: Past Evidence and Future Role - Absrtact
2008 Joint SRM/AFGC Meeting in Louisville, Kentucky, Jan 26-31, 2008. The theme is "Building Bridges: Grasslands to Rangelands".
The natural vegetation of the semiarid Northern Negev region of Israel has been considerably impacted by grazing, cultivation and shrub cutting. Herding of small livestock and grain farming have been practiced for millennia. Till the 1950's, humans controlled shrub cover by harvesting it for energy for households and small industry. Recent comparisons have indicated that there is a qualitative difference between the Old and New Worlds in their resilience to grazing. According to this view, systems with millennia of grazing history are more robust when subjected to traditional patterns of heavy pastoralism. These ideas are discussed in the light of 20 years of research conducted at the Lehavim LTER site in the Northern Negev. Since its establishment, a slow increase in shrub cover (primarily Sarcopoterium spinosum) has been observed at this site. Grazing exclosures tended to exhibit enhanced shrub cover, supporting the claim that grazing is not the cause of "shrub desertification" but is a means of controlling it. The herbaceous productivity varied primarily in response to habitat and climate; no long-term trends in productivity have been detected. It seems that the herbaceous vegetation is well adapted to unpredictable rainfall and high grazing intensity. The diversity of annual plants is determined by the interaction between grazing and small-scale spatial and temporal variation in primary productivity. Shrubs act as a refuge for herbaceous species that are grazing sensitive. Scientific attitudes towards shrub vegetation and grazing animals have become less negative over recent decades. In the most progressive viewpoint, both types of organism are viewed as ecosystem engineers that can promote landscape heterogeneity and the preservation of resources at the hillside scale. Man's challenge is to understand this complex system and play the role of the super-engineer that managed the natural engineers to promote the long-term sustainability of the rangeland resource.
 
.
 
Scientific Publication
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