Seed Predation and Dormancy in the Population Dynamics of Avena Fatua and A. Barbata

Ecology ◽  
1970 ◽  
Vol 51 (5) ◽  
pp. 886-891 ◽  
Author(s):  
D. R. Marshall ◽  
S. K. Jain
Keyword(s):  
Population Dynamics ◽  
Seed Predation ◽  
Avena Fatua

Electrophoretic and allometric variation in burdock (Arctium spp.): hybridization and its ecological implications

1985 ◽  
Vol 63 (7) ◽  
pp. 1255-1261 ◽  
Author(s):  
C. David Rollo ◽  
J. D. MacFarlane ◽  
B. S. Smith
Keyword(s):  
Population Dynamics ◽  
Isoelectric Focusing ◽  
Seed Predation ◽  
Parental Species ◽  
Seed Viability ◽  
Combined Effects ◽  
Alkaline Phosphatases ◽  
Ecological Implications ◽  
Insect Seed Predation ◽  
Insect Predation

Allometric variation and insect seed predation among Arctium minus, A. lappa, and two possible hybrids were quantified. All four biotypes were also examined using isoelectric focusing, and differences among their proteins were found for alkaline phosphatases, leucine amino peptidases, esterases, and peroxidases. The allometric and electrophoretic results indicated that hybridization between A. minus and A. lappa is very common. The implications for the population dynamics of Arctium are discussed. The parental species are probably maintained by the combined effects of differential insect predation on the seeds, differential dispersal of seeds, and reduced seed viability in hybrids.

Predispersal seed predation and population dynamics in the perennial understorey herb Actaea spicata

2003 ◽  
Vol 81 (11) ◽  
pp. 1058-1069 ◽  
Author(s):  
Heléne Fröborg ◽  
Ove Eriksson
Keyword(s):  
Population Dynamics ◽  
Seed Predation ◽  
Seedling Recruitment ◽  
Deciduous Forest ◽  
Transition Probabilities ◽  
Coniferous Forest ◽  
Perennial Herb ◽  
Seed Predator ◽  
Predispersal Seed Predation ◽  
The Impact

Predispersal seed predation by a moth larva, Eupithecia immundata Leinig & Zeller (Geometridae), and its impact on population dynamics of the perennial herb Actaea spicata L. were studied during 7 years in deciduous and mixed coniferous forest populations in southeastern Sweden. Twelve population matrix models were constructed based on transition probabilities among six stage classes in the populations. The fraction of seeds consumed varied between 21% and 80% but was not significantly correlated with seed production. Experimental seed addition compensating for seed losses caused by the seed predator resulted in increased seedling emergence in one of the populations. Population growth rate was positive (λ > 1) in 1 of 6 years in the deciduous forest population and in 2 of 6 years in the mixed coniferous forest population. Survival among reproductive individuals contributed most strongly to λ in both populations. In some years, the projected λ changed from positive to negative values because of seed loss caused by E. immundata. However, results suggest that seed predation did not affect λ to any large extent, despite a considerable seed predation. This study is one of the rare efforts to estimate the impact of seed predation on population dynamics of perennial plants.Key words: Actaea spicata, demography, population dynamics, predispersal seed predation, seedling recruitment.

Partial predispersal seed predation in Lotus corniculatus L. (Fabaceae)

1996 ◽  
Vol 6 (2) ◽  
pp. 65-69 ◽  
Author(s):  
Jeff Ollerton ◽  
Andrew Lack
Keyword(s):  
Population Dynamics ◽  
Seed Predation ◽  
Plant Traits ◽  
Lotus Corniculatus ◽  
Individual Plant ◽  
Ecological Significance ◽  
Plant Population Dynamics ◽  
Seedling Vigour ◽  
Seed Predator ◽  
Predispersal Seed Predation

AbstractPredispersal seed predation may have implications for plant population dynamics and the evolution of plant traits, but assessing the level of seed predation for an individual plant is not always straightforward. Seeds of Lotus corniculatus (Fabaceae) are often only partially eaten by a weevil seed predator, Apion loti. Samples of these seeds were tested for viability and subsequent seedling vigour. A large proportion of these damaged seeds were viable, and the resulting seedlings almost as vigorous as those from undamaged seeds. The ubiquity of these findings, and their ecological significance, is discussed.

scholarly journals Uncoupling the Effects of Seed Predation and Seed Dispersal by Granivorous Ants on Plant Population Dynamics

PLoS ONE ◽  
2012 ◽  
Vol 7 (8) ◽  
pp. e42869 ◽  
Author(s):  
Xavier Arnan ◽  
Roberto Molowny-Horas ◽  
Anselm Rodrigo ◽  
Javier Retana
Keyword(s):  
Population Dynamics ◽  
Seed Dispersal ◽  
Seed Predation ◽  
Plant Population ◽  
Plant Population Dynamics
Sign in / Sign up

Export Citation Format

Share Document