Asymmetric competition and the evolution of propagule size
(2003) In Journal of Ecology 91(4). p.554-562- Abstract
- 1 In an asexually reproducing plant (Potamogeton pectinatus L.) the competitive advantage of a larger propagule over a smaller one was determined by a single parameter (alpha, the competitive asymmetry coefficient), independent of sowing density or average propagule size. Competitive advantage was determined by the relative size difference between propagules instead of their absolute difference. 2 Productivity per germination site increased with the number and size of propagules present, even at densities high enough to result in decreased per capita yield due to plant competition. 3 Both the number of propagules produced by a plant and their size increased with increasing per capita resource capture. Therefore, propagule size was neither... (More)
- 1 In an asexually reproducing plant (Potamogeton pectinatus L.) the competitive advantage of a larger propagule over a smaller one was determined by a single parameter (alpha, the competitive asymmetry coefficient), independent of sowing density or average propagule size. Competitive advantage was determined by the relative size difference between propagules instead of their absolute difference. 2 Productivity per germination site increased with the number and size of propagules present, even at densities high enough to result in decreased per capita yield due to plant competition. 3 Both the number of propagules produced by a plant and their size increased with increasing per capita resource capture. Therefore, propagule size was neither equal to the size of the propagule from which the plant germinated nor independent of resource status. 4 Our results clarify what assumptions should be made in ecological and evolutionary models dealing with competition for resources between seedlings. In particular, the use of relative size differences instead of absolute ones should lead to the evolution of smaller propagules than those expected if competitive advantage grew with absolute propagule size. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/306010
- author
- Rodriguez-Girones, MA ; Sandsten, Håkan LU and Santamaria, L
- organization
- publishing date
- 2003
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- Potamogeton pectinatus L., seed size, competitive advantage, germination sites
- in
- Journal of Ecology
- volume
- 91
- issue
- 4
- pages
- 554 - 562
- publisher
- Wiley-Blackwell
- external identifiers
-
- wos:000184268300004
- scopus:0042209980
- ISSN
- 1365-2745
- DOI
- 10.1046/j.1365-2745.2003.00800.x
- language
- English
- LU publication?
- yes
- additional info
- The information about affiliations in this record was updated in December 2015. The record was previously connected to the following departments: Limnology (Closed 2011) (011007000)
- id
- b261b586-64ac-403f-b2a9-fcfe498629a7 (old id 306010)
- date added to LUP
- 2016-04-01 12:09:35
- date last changed
- 2022-04-13 06:54:38
@article{b261b586-64ac-403f-b2a9-fcfe498629a7,
abstract = {{1 In an asexually reproducing plant (Potamogeton pectinatus L.) the competitive advantage of a larger propagule over a smaller one was determined by a single parameter (alpha, the competitive asymmetry coefficient), independent of sowing density or average propagule size. Competitive advantage was determined by the relative size difference between propagules instead of their absolute difference. 2 Productivity per germination site increased with the number and size of propagules present, even at densities high enough to result in decreased per capita yield due to plant competition. 3 Both the number of propagules produced by a plant and their size increased with increasing per capita resource capture. Therefore, propagule size was neither equal to the size of the propagule from which the plant germinated nor independent of resource status. 4 Our results clarify what assumptions should be made in ecological and evolutionary models dealing with competition for resources between seedlings. In particular, the use of relative size differences instead of absolute ones should lead to the evolution of smaller propagules than those expected if competitive advantage grew with absolute propagule size.}},
author = {{Rodriguez-Girones, MA and Sandsten, Håkan and Santamaria, L}},
issn = {{1365-2745}},
keywords = {{Potamogeton pectinatus L.; seed size; competitive advantage; germination sites}},
language = {{eng}},
number = {{4}},
pages = {{554--562}},
publisher = {{Wiley-Blackwell}},
series = {{Journal of Ecology}},
title = {{Asymmetric competition and the evolution of propagule size}},
url = {{http://dx.doi.org/10.1046/j.1365-2745.2003.00800.x}},
doi = {{10.1046/j.1365-2745.2003.00800.x}},
volume = {{91}},
year = {{2003}},
}