נגישות
menu      
חיפוש מתקדם
תחביר
חפש...
הספר "אוצר וולקני"
אודות
תנאי שימוש
ניהול
קהילה:
אסיף מאגר המחקר החקלאי
פותח על ידי קלירמאש פתרונות בע"מ -
The effect of shrubs on the seed rain of annuals in a semiarid landscape
Year:
2007
Source of publication :
Israel Journal of Plant Sciences
Authors :
אונגר, יוג'ין דוד
;
.
Volume :
55
Co-Authors:
Giladi, I., Mitrani Department of Desert Ecology, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer 84990, Israel
Segoli, M., Mitrani Department of Desert Ecology, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer 84990, Israel
Ungar, E.D., Department of Agronomy and Natural Resources, Institute of Plant Sciences, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
83
To page:
92
(
Total pages:
10
)
Abstract:
Sarcopoterium spinosum (prickly burnet) is a dominant shrub species in many semi-arid shrublands of the eastern Mediterranean region. The annual plant community under the shrub canopy differs significantly from that in open (intershrub) patches in terms of abundance, biomass, and species diversity. This shrub/open contrast in . vegetation closely matches the contrast in abiotic conditions, which is mainly attributed to the engineering effects of the shrub. However, S. spinosum may also act as a seed barrier between patch types, thus controlling which seeds are exposed to the contrasting conditions. As the canopy of S. spinosum is shaped like a tightly packed cushion, we hypothesized that it prevents or slows the movement of seeds across patch boundaries. We tested this hypothesis by comparing the seed rains under intact shrubs, under shrubs whose canopies were removed, and in open patches. We compared the distribution among the patch types of species at the seed stage with that of the same species at the adult stage. We found a sharp contrast in seed population between seed traps under intact shrubs and those in open patches, and a much weaker contrast between seed traps under removed shrub canopies and those in open patches. However, between-patch differences at the seed stage tightly paralleled those seen at the adult stage, strongly suggesting that within-patch dispersal is much more probable than between-patch dispersal. The implications of these dispersal patterns for population and community dynamics are discussed. In addition, we discuss the consequences of our findings for shrub-annuals interaction. © 2007 Science From Israel / LPPLtd.
Note:
Related Files :
Biomass
Dispersal limitation
Sarcopoterium spinosum
seed dispersal
shrub
Shrubland
עוד תגיות
תוכן קשור
More details
DOI :
10.1560/IJPS.55.1.83
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28803
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:42
Scientific Publication
The effect of shrubs on the seed rain of annuals in a semiarid landscape
55
Giladi, I., Mitrani Department of Desert Ecology, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer 84990, Israel
Segoli, M., Mitrani Department of Desert Ecology, Jacob Blaustein Institutes for Desert Research, Ben-Gurion University of the Negev, Sede Boqer 84990, Israel
Ungar, E.D., Department of Agronomy and Natural Resources, Institute of Plant Sciences, Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
The effect of shrubs on the seed rain of annuals in a semiarid landscape
Sarcopoterium spinosum (prickly burnet) is a dominant shrub species in many semi-arid shrublands of the eastern Mediterranean region. The annual plant community under the shrub canopy differs significantly from that in open (intershrub) patches in terms of abundance, biomass, and species diversity. This shrub/open contrast in . vegetation closely matches the contrast in abiotic conditions, which is mainly attributed to the engineering effects of the shrub. However, S. spinosum may also act as a seed barrier between patch types, thus controlling which seeds are exposed to the contrasting conditions. As the canopy of S. spinosum is shaped like a tightly packed cushion, we hypothesized that it prevents or slows the movement of seeds across patch boundaries. We tested this hypothesis by comparing the seed rains under intact shrubs, under shrubs whose canopies were removed, and in open patches. We compared the distribution among the patch types of species at the seed stage with that of the same species at the adult stage. We found a sharp contrast in seed population between seed traps under intact shrubs and those in open patches, and a much weaker contrast between seed traps under removed shrub canopies and those in open patches. However, between-patch differences at the seed stage tightly paralleled those seen at the adult stage, strongly suggesting that within-patch dispersal is much more probable than between-patch dispersal. The implications of these dispersal patterns for population and community dynamics are discussed. In addition, we discuss the consequences of our findings for shrub-annuals interaction. © 2007 Science From Israel / LPPLtd.
Scientific Publication
You may also be interested in