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Titolo:
The effects of grazing on abiotic and biotic parameters in a semiarid ecosystem: A case study from the Northern Negev Desert, Israel
Autore:
Zaady, E; Yonatan, R; Shachak, M; Perevolotsky, A;
Indirizzi:
Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Desertificat & Restorat Ecol Res Ctr, IL-84990 Sede Boqer, Israel Ben Gurion Univ Negev SedeBoqer Israel IL-84990 4990 Sede Boqer, Israel Agr Res Org, Volcani Ctr, Dept Nat Resources & Field Crop, IL-50250 Bet Dagan, Israel Agr Res Org Bet Dagan Israel IL-50250 d Crop, IL-50250 Bet Dagan, Israel Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Mitrani Dept Desert Ecol, IL-84990 Sede Boqer, Israel Ben Gurion Univ Negev Sede Boqer Israel IL-84990 4990 Sede Boqer, Israel
Titolo Testata:
ARID LAND RESEARCH AND MANAGEMENT
fascicolo: 3, volume: 15, anno: 2001,
pagine: 245 - 261
SICI:
1532-4982(200107/09)15:3<245:TEOGOA>2.0.ZU;2-W
Fonte:
ISI
Lingua:
ENG
Soggetto:
SOILS; INFILTRATION; COMMUNITIES; MANAGEMENT; NITROGEN; PATCHES; EROSION; CRUST;
Keywords:
biomass; diversity; management; organic matter; productivity; soil moisture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Citazioni:
38
Recensione:
Indirizzi per estratti:
Indirizzo: Zaady, E Ben Gurion Univ Negev, Jacob Blaustein Inst Desert Res, Desertificat & Restorat Ecol Res Ctr, Seke Boker Campus, IL-84990 Sede Boqer, IsraelBen Gurion Univ Negev Seke Boker Campus Sede Boqer Israel IL-84990
Citazione:
E. Zaady et al., "The effects of grazing on abiotic and biotic parameters in a semiarid ecosystem: A case study from the Northern Negev Desert, Israel", ARID LAND R, 15(3), 2001, pp. 245-261

Abstract

Livestock grazing is considered a disturbance of both biotic and abiotic parameters that may lead to degradation of rangelands and desertification. We report a case in which grazing was used as a management tool in a rehabilitation Project. The aim of this study was to quantify the effects of grazing on a managed ecological system. To do so, we monitored the diversity andcomposition of the plant community, herbaceous biomass, soil moisture, soil organic matter, habitat structure and quality of the vegetation for grazers (protein content and digestion). These parameters were monitored on the south and the north slopes, because of the differences in the radiation, which affect the water regime and the vegetation. Monitoring was ill grazed plots and in plots ungrazed for three years. Our results showed that grazinghad immediate effects on the plant community and habitat structure. The densities Of plant species decreased (similar to 20%), vegetation community, composition was affected (similar to 50 61%) and exposed soil sui:face increased (similar to 50%). A significant decrease was found in total protein content in plants over time from 17-19% in beginning Of the grazing season to 5-6% at the peak of the season. Digestible material was significantly more at the peak of the growing season in the grazed plots (63.7%) compared tothe ungrazed plots (57.4%) in the north-facing slope, but not in the south-facing slope. When plant diversity, soil fertility, and soil moisture wereconsidered, no correlation was found in relation to grazing. The significance of the research was that it demonstrated that livestock grazing can be effective as a management tool while imposing limited damage to the ecosystem.

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Documento generato il 01/04/20 alle ore 11:18:36