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From microsite selection to population spatial distribution: Pinus halepensis colonization in mediterranean-type ecosystems
Year:
2015
Source of publication :
Plant Ecology
Authors :
וייץ, יוני
;
.
כהן, יפית
;
.
פרבולוצקי, אבי
;
.
Volume :
216
Co-Authors:
Waitz, Y., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Cohen, Y., Institute of Agricultural Engineering, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Dorman, M., Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer-Sheva, Israel
Perevolotsky, A., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Facilitators :
From page:
1311
To page:
1324
(
Total pages:
14
)
Abstract:
This paper examines the effect of landscape heterogeneity on pine establishment and survival at both juvenile and mature stages. A field survey of seedlings (juvenile stage) was carried out in two sites (Shaharia and Nahal HaHamisha) close to planted forests of Pinushalepensis in the dry mediterranean region of Israel. Seedling establishment rate at the microsite level was determined by comparing to the proportions of actual land-cover categories—bare ground, rock, shrub, and tree, using a spectral classification of aerial photographs. The dynamics of tree colonization at one of the sites (Shaharia) during the last 30 years were examined using aerial photographs, GIS tools and generalized linear models, to assess the effects of distance from planted forest, aspect, slope, and land cover on the density of pine trees, was conducted. Shrub cover was significantly favorable for both juvenile and mature pines at both sites, while the opposite was true for bare ground. Trees had a negative effect at one site. Rock had a positive effect on juveniles in both sites and a negative effect on mature pine distribution, reflecting its facilitative effect in the early stage and constraints for the late stage. A combined land-cover category of shrub+rock in one site, undetectable from aerial photographs, had the strongest effect of both covers on pine establishment. Proximity to the planted forest significantly increased pine density. Facilitation mechanisms provide the necessary mitigation of stresses imposed by irradiance, moisture shortage, and competition from neighboring vegetation on seedling establishment and survival. These mechanisms, combined with the spatial aspect of seed dispersal from planted forests, are the key to understanding the multiple–scale dynamics of pine expansion. © 2015, Springer Science+Business Media Dordrecht.
Note:
Related Files :
Facilitation
Pinus halepensis
plant community
remote sensing
satellite data
Seedling establishment
עוד תגיות
תוכן קשור
More details
DOI :
10.1007/s11258-015-0511-7
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
28072
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 00:36
Scientific Publication
From microsite selection to population spatial distribution: Pinus halepensis colonization in mediterranean-type ecosystems
216
Waitz, Y., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Cohen, Y., Institute of Agricultural Engineering, Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
Dorman, M., Department of Geography and Environmental Development, Ben-Gurion University of the Negev, Beer-Sheva, Israel
Perevolotsky, A., Agricultural Research Organization, The Volcani Center, P.O. Box 6, Bet Dagan, Israel
From microsite selection to population spatial distribution: Pinus halepensis colonization in mediterranean-type ecosystems
This paper examines the effect of landscape heterogeneity on pine establishment and survival at both juvenile and mature stages. A field survey of seedlings (juvenile stage) was carried out in two sites (Shaharia and Nahal HaHamisha) close to planted forests of Pinushalepensis in the dry mediterranean region of Israel. Seedling establishment rate at the microsite level was determined by comparing to the proportions of actual land-cover categories—bare ground, rock, shrub, and tree, using a spectral classification of aerial photographs. The dynamics of tree colonization at one of the sites (Shaharia) during the last 30 years were examined using aerial photographs, GIS tools and generalized linear models, to assess the effects of distance from planted forest, aspect, slope, and land cover on the density of pine trees, was conducted. Shrub cover was significantly favorable for both juvenile and mature pines at both sites, while the opposite was true for bare ground. Trees had a negative effect at one site. Rock had a positive effect on juveniles in both sites and a negative effect on mature pine distribution, reflecting its facilitative effect in the early stage and constraints for the late stage. A combined land-cover category of shrub+rock in one site, undetectable from aerial photographs, had the strongest effect of both covers on pine establishment. Proximity to the planted forest significantly increased pine density. Facilitation mechanisms provide the necessary mitigation of stresses imposed by irradiance, moisture shortage, and competition from neighboring vegetation on seedling establishment and survival. These mechanisms, combined with the spatial aspect of seed dispersal from planted forests, are the key to understanding the multiple–scale dynamics of pine expansion. © 2015, Springer Science+Business Media Dordrecht.
Scientific Publication
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