Spatial scale and temporal component of selection in side-blotched lizards
Svensson, Erik LU
and Sinervo, B
(2004)
In American Naturalist
163(5).
p.726-734
- Abstract
- Spatial variation in selection has long been recognized as promoting population divergence and in maintaining genetic polymorphisms, but selection at a fine spatial scale is seldom measured directly. We analyzed spatial and temporal variation in selective regimes on egg size using long-term population data of the side-blotched lizard ( Uta stansburiana). Juvenile survival rates varied between years at a small spatial scale that was reflected as a strong interaction between the local neighborhood level and year. Spatially and temporally variable selection acted jointly on egg mass, which presumably would facilitate the maintenance of high additive genetic variance for this trait. Local selection gradients calculated at the neighborhood... (More)
- Spatial variation in selection has long been recognized as promoting population divergence and in maintaining genetic polymorphisms, but selection at a fine spatial scale is seldom measured directly. We analyzed spatial and temporal variation in selective regimes on egg size using long-term population data of the side-blotched lizard ( Uta stansburiana). Juvenile survival rates varied between years at a small spatial scale that was reflected as a strong interaction between the local neighborhood level and year. Spatially and temporally variable selection acted jointly on egg mass, which presumably would facilitate the maintenance of high additive genetic variance for this trait. Local selection gradients calculated at the neighborhood level were significantly correlated with the annual global selection gradients calculated at the metapopulation level. However, there was substantial variance in these local selective regimes, which suggests that strong local selection could go undetected if the analysis was limited to the global level. We also investigated the degree of spatial synchronization among outcrop in local selection gradients. The degree of synchrony was higher among later-clutch hatchlings than among first-clutch hatchlings, and we suggest that more intense density- and frequency-dependent selection on egg size later in the season is responsible for this effect. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/136992
- author
- Svensson, Erik
LU
and Sinervo, B
- organization
- publishing date
- 2004
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- competition, egg mass, frequency dependence, polymorphism
- in
- American Naturalist
- volume
- 163
- issue
- 5
- pages
- 726 - 734
- publisher
- University of Chicago Press
- external identifiers
-
- wos:000221651400009
- scopus:2642551628
- pmid:15122490
- ISSN
- 0003-0147
- DOI
- 10.1086/383592
- language
- English
- LU publication?
- yes
- id
- fce61501-e7ba-4d1e-8bb9-ecc889d6d028 (old id 136992)
- alternative location
- http://www.journals.uchicago.edu/doi/pdf/10.1086/383592
- date added to LUP
- 2016-04-01 12:23:56
- date last changed
- 2024-01-08 19:08:36
@article{fce61501-e7ba-4d1e-8bb9-ecc889d6d028,
abstract = {{Spatial variation in selection has long been recognized as promoting population divergence and in maintaining genetic polymorphisms, but selection at a fine spatial scale is seldom measured directly. We analyzed spatial and temporal variation in selective regimes on egg size using long-term population data of the side-blotched lizard ( Uta stansburiana). Juvenile survival rates varied between years at a small spatial scale that was reflected as a strong interaction between the local neighborhood level and year. Spatially and temporally variable selection acted jointly on egg mass, which presumably would facilitate the maintenance of high additive genetic variance for this trait. Local selection gradients calculated at the neighborhood level were significantly correlated with the annual global selection gradients calculated at the metapopulation level. However, there was substantial variance in these local selective regimes, which suggests that strong local selection could go undetected if the analysis was limited to the global level. We also investigated the degree of spatial synchronization among outcrop in local selection gradients. The degree of synchrony was higher among later-clutch hatchlings than among first-clutch hatchlings, and we suggest that more intense density- and frequency-dependent selection on egg size later in the season is responsible for this effect.}},
author = {{Svensson, Erik and Sinervo, B}},
issn = {{0003-0147}},
keywords = {{competition; egg mass; frequency dependence; polymorphism}},
language = {{eng}},
number = {{5}},
pages = {{726--734}},
publisher = {{University of Chicago Press}},
series = {{American Naturalist}},
title = {{Spatial scale and temporal component of selection in side-blotched lizards}},
url = {{https://lup.lub.lu.se/search/files/2907233/624622.pdf}},
doi = {{10.1086/383592}},
volume = {{163}},
year = {{2004}},
}