The partitioning of density-dependent dispersal, growth and survival throughout ontogeny in a highly fecund organism
Article Abstract:
Field experiments are conducted to test ontogenic sequence of density dependence by manipulating local density at two life-history stages in juvenile Atlantic salmon. The results indicate that density-dependent effects are partitioned amongst survival, growth and dispersal changes throughout ontogeny and these changes occur in correlation with changes in individual mortality risks and dispersal abilities, and suggest a general paradigm for the way in which juvenile density dependence is manifest in spatially structured populations of highly fecund organisms.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2006
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Viability selection on overwintering eggs in a field cricket mosaic hybrid zone
Article Abstract:
The way in which the viability selection on overwintering eggs in different soils influences the distributions of the two species, habitat partitioning between them, and the structure of the mosaic hybrid zone is investigated. The results have indicated that selection on eggs by soil types is not important in determining the success of crickets on different soils, but winter climate has a strong effect on egg viability.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2006
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The effects of gap creation on competitive interactions: separating changes in overall intensity from relative rankings
Article Abstract:
Research on disturbance ecology indicates that gap creation may have an impact on species' competitive rankings when coupled with a decrease in overall competitive intensity. Data were obtained from meta-analyses of different disturbance regimes.
Publication Name: Oikos
Subject: Environmental issues
ISSN: 0030-1299
Year: 2001
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