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Landscape-scale density-dependent recruitment of oaks in planted forests: More is not always better
Year:
2013
Source of publication :
Ecology
Authors :
פרבולוצקי, אבי
;
.
Volume :
94
Co-Authors:
Sheffer, E., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Robert H. Smith Faculty of Agriculture, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States
Canham, C.D., Cary Institute of Ecosystem Studies, Box AB, Millbrook, NY 12545, United States
Kigel, J., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Robert H. Smith Faculty of Agriculture, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Perevolotsky, A., Department of Agronomy and Natural Resources, Institute of Plant Sciences, Agricultural Research Organization, the Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Facilitators :
From page:
1718
To page:
1728
(
Total pages:
11
)
Abstract:
Plant colonization studies usually address density-dependent processes in the narrow sense of recruitment constraints due to negative density-dependent seed and seedling mortality. However, complex density-dependent effects may be involved in additional stages of the recruitment process. We hypothesized that seed arrival and seedling establishment are influenced by density dependence acting at small scales at the site of colonization, and at larger scales as a function of the colonizing species' landscape abundance. These hypotheses were tested in a study of colonization of pine forests by oaks in a heterogeneous Mediterranean landscape. Maximum-likelihood models show that density effects switch from positive to negative along the range of landscape-scale oak seed source abundance. Contrary to expectations, high seed source densities limited oak recruitment, suggesting a landscape-scale Janzen-Connell effect. We propose a range of mechanisms that generate positive or negative density dependence during colonization, resulting in nonlinear density-dependent feedbacks that can generate unexpected colonization patterns. © 2013 by the Ecological Society of America.
Note:
Related Files :
Dispersal limitation
Forestry
Israel
pine
Pinus
Pinus halepensis
Quercus
trees
עוד תגיות
תוכן קשור
More details
DOI :
10.1890/12-2121.1
Article number:
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
31549
Last updated date:
02/03/2022 17:27
Creation date:
17/04/2018 01:03
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Scientific Publication
Landscape-scale density-dependent recruitment of oaks in planted forests: More is not always better
94
Sheffer, E., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Robert H. Smith Faculty of Agriculture, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel, Department of Ecology and Evolutionary Biology, Princeton University, Princeton, NJ 08544, United States
Canham, C.D., Cary Institute of Ecosystem Studies, Box AB, Millbrook, NY 12545, United States
Kigel, J., Robert H. Smith Institute of Plant Sciences and Genetics in Agriculture, Robert H. Smith Faculty of Agriculture, Hebrew University of Jerusalem, P.O. Box 12, Rehovot 76100, Israel
Perevolotsky, A., Department of Agronomy and Natural Resources, Institute of Plant Sciences, Agricultural Research Organization, the Volcani Center, P.O. Box 6, Bet Dagan 50250, Israel
Landscape-scale density-dependent recruitment of oaks in planted forests: More is not always better
Plant colonization studies usually address density-dependent processes in the narrow sense of recruitment constraints due to negative density-dependent seed and seedling mortality. However, complex density-dependent effects may be involved in additional stages of the recruitment process. We hypothesized that seed arrival and seedling establishment are influenced by density dependence acting at small scales at the site of colonization, and at larger scales as a function of the colonizing species' landscape abundance. These hypotheses were tested in a study of colonization of pine forests by oaks in a heterogeneous Mediterranean landscape. Maximum-likelihood models show that density effects switch from positive to negative along the range of landscape-scale oak seed source abundance. Contrary to expectations, high seed source densities limited oak recruitment, suggesting a landscape-scale Janzen-Connell effect. We propose a range of mechanisms that generate positive or negative density dependence during colonization, resulting in nonlinear density-dependent feedbacks that can generate unexpected colonization patterns. © 2013 by the Ecological Society of America.
Scientific Publication
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