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Experimental Protocol for Manipulating Plant-induced Soil Heterogeneity
Published on: March 13, 2014
Spatial variability in seed predation in Primula farinosa: local population legacy versus patch selection
Didrik Vanhoenacker1, Jon Agren, Johan Ehrlén
1Department of Botany, Stockholm University, Stockholm, Sweden. didrik@botan.su.se
Oecologia
|February 14, 2009
Summary
Seed predation intensity in Primula farinosa is influenced by host plant traits, not predator history. The moth Falseuncaria ruficiliana prefers taller, more numerous flowers, impacting plant evolution.
Area of Science:
- Ecology
- Evolutionary Biology
- Plant-Insect Interactions
Background:
- Seed predation significantly impacts plant population dynamics and trait selection.
- Factors influencing seed predation intensity, such as local predator abundance and host plant characteristics, are not fully understood.
- Primula farinosa exhibits dimorphism in scape length, offering a model for studying trait-mediated predation.
Purpose of the Study:
- To investigate the spatio-temporal variation in seed predation of Primula farinosa.
- To determine the relative importance of local predator legacy, host plant distribution, environmental factors, and plant traits on seed predation.
- To assess the role of Falseuncaria ruficiliana in shaping P. farinosa populations.
Main Methods:
- Monitoring seed predation over five years across 79 P. farinosa populations.
- Conducting a transplant experiment to assess predator dispersal limitations.
- Analyzing correlations between population characteristics (size, flower number, scape morph frequency) and predation incidence/intensity.
Main Results:
- Falseuncaria ruficiliana dispersal was not limited at the studied spatial scales.
- Predation incidence correlated positively with host population size and flower number.
- Predation intensity was linked to the frequency of the long-scaped morph and negatively to population size in specific years.
- No evidence of a 'local legacy' effect from previous predator abundance was found.
Conclusions:
- Seed predation intensity is primarily driven by patch selection by the predator.
- The seed predator's preference for specific plant traits influences both within-population selection and overall predation levels.
- Understanding these dynamics is crucial for predicting plant population trajectories and evolutionary responses.
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