Data from: The demographic effects of functional traits: an integral projection model approach reveals population-level consequences of reproduction-defense tradeoffs
Couture, John J.
LaMar, M. Drew
Dalgleish, Harmony J.
Published Jun 20, 2019 on Dryad.
Cite this dataset
Struckman, Soren; Couture, John J.; LaMar, M. Drew; Dalgleish, Harmony J. (2019). Data from: The demographic effects of functional traits: an integral projection model approach reveals population-level consequences of reproduction-defense tradeoffs [Dataset]. Dryad. https://doi.org/10.5061/dryad.5fm57t0
Quantitatively linking individual variation in functional traits to demography is a necessary step to advance our understanding of trait-based ecological processes. We constructed a population model for Asclepias syriaca to identify how functional traits affect vital rates and population growth and whether tradeoffs in chemical defense and demography alter population growth. Plants with higher foliar cardenolides had lower fiber, cellulose, and lignin levels, as well as decreased sexual and clonal reproduction. Average cardenolide concentrations had the strongest effect on population growth. In both the sexual and clonal pathway, the tradeoff between reproduction and defense affected population growth. We found that both increasing the mean of the distribution of individual plant values for cardenolides and herbivory decreased population growth. However, increasing the variance in both defense and herbivory increased population growth. Functional traits can impact population growth and quantifying individual-level variation in traits should be included in assessments of population-level processes.
ramet-based demographic and trait data
File contains data for 2014 and 2015 that were used to parameterize the vital rate functions. Contains both demographic and trait data.
spatial location data for ramets of A. syriaca
File contains spatial location data along 1 m wide transects for 2014 and 2015 for Asclepias syriaca ramets.
number of seeds per pod for A. syriaca
File contains seed count data for individual pods on Asclepias syriaca ramets.
demographic data for ramets of A. syriaca
File contains demographic data collected between 2013-2017 at 7 sites for A. syriaca ramets
Code for "The demographic effects of functional traits: An integral projection model approach reveals population-level consequences of reproduction-defense tradeoffs"