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פותח על ידי קלירמאש פתרונות בע"מ -
Effects of grazing on soil seed bank dynamics: An approach with functional groups
Year:
2003
Source of publication :
Journal of Vegetation Science
Authors :
גוטמן, מריו
;
.
פרבולוצקי, אבי
;
.
Volume :
14
Co-Authors:
Sternberg, M., Department of Plant Sciences, Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
Gutman, M., Department of Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Perevolotsky, A., Department of Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Kigel, J., Inst. of Plant Sci./Genet. in Agric., Fac. Agric., Food/Environ. Qual. S., Hebrew University of Jerusalem, PO Box 12, Rehovot 76100, Israel
Facilitators :
From page:
375
To page:
386
(
Total pages:
12
)
Abstract:
The relationship between intensity and timing of cattle grazing on changes in the size and composition of the soil seed bank were investigated in a 3-yr study in a Mediterranean grassland in northeastern Israel. Treatments included manipulations of stocking rates and of grazing regimes, in a factorial design. The retrieved soil seed bank community was rich in species, with 133 species accounting for 80% of the 166 species recorded at the site. Within the seed bank, 89% of the species were annuals. Seed bank dynamics was analysed in terms of plant functional groups and germination strategies. In terms of total seed bank density and including all functional groups, 42% of the seeds present in the soil did not germinate under watering conditions. The dormancy level differed greatly among functional groups. The seed bank of annual legumes, crucifers, annual thistles and annual forbs had a large fraction of non-germinated seeds and characterized areas grazed early in the growing season under high and very high grazing intensity. These functional groups were considered to have a higher potential for persistent seed banks production. In contrast, short and tall annual grasses and tall perennial grasses, that were dominant in ungrazed or moderately grazed paddocks, generally had seed banks with a very small fraction of non-germinated seeds. Seed bank densities varied widely between grazing treatments and years. Under continuous grazing, heavy grazing pressure reduced seed bank densities of grasses and crucifers in comparison to moderate grazing. The greatest reduction on the seed bank densities resulted from heavy grazing concentrated during the seed-set stages.
Note:
Related Files :
cattle
community composition
dormancy
germination
Grazing
Israel
Management
Mediterranean
Persistence
עוד תגיות
תוכן קשור
More details
DOI :
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר מתוך כינוס
;
.
Language:
אנגלית
Editors' remarks:
ID:
30302
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:53
You may also be interested in
Scientific Publication
Effects of grazing on soil seed bank dynamics: An approach with functional groups
14
Sternberg, M., Department of Plant Sciences, Wise Faculty of Life Sciences, Tel Aviv University, Tel Aviv 69978, Israel
Gutman, M., Department of Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Perevolotsky, A., Department of Natural Resources, ARO, Volcani Center, PO Box 6, Bet Dagan 50250, Israel
Kigel, J., Inst. of Plant Sci./Genet. in Agric., Fac. Agric., Food/Environ. Qual. S., Hebrew University of Jerusalem, PO Box 12, Rehovot 76100, Israel
Effects of grazing on soil seed bank dynamics: An approach with functional groups
The relationship between intensity and timing of cattle grazing on changes in the size and composition of the soil seed bank were investigated in a 3-yr study in a Mediterranean grassland in northeastern Israel. Treatments included manipulations of stocking rates and of grazing regimes, in a factorial design. The retrieved soil seed bank community was rich in species, with 133 species accounting for 80% of the 166 species recorded at the site. Within the seed bank, 89% of the species were annuals. Seed bank dynamics was analysed in terms of plant functional groups and germination strategies. In terms of total seed bank density and including all functional groups, 42% of the seeds present in the soil did not germinate under watering conditions. The dormancy level differed greatly among functional groups. The seed bank of annual legumes, crucifers, annual thistles and annual forbs had a large fraction of non-germinated seeds and characterized areas grazed early in the growing season under high and very high grazing intensity. These functional groups were considered to have a higher potential for persistent seed banks production. In contrast, short and tall annual grasses and tall perennial grasses, that were dominant in ungrazed or moderately grazed paddocks, generally had seed banks with a very small fraction of non-germinated seeds. Seed bank densities varied widely between grazing treatments and years. Under continuous grazing, heavy grazing pressure reduced seed bank densities of grasses and crucifers in comparison to moderate grazing. The greatest reduction on the seed bank densities resulted from heavy grazing concentrated during the seed-set stages.
Scientific Publication
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