10.5061/DRYAD.NK23D
Sletvold, Nina
Uppsala University
Ågren, Jon
Uppsala University
Data from: Non-linear costs of reproduction in a long-lived plant
Dryad
dataset
2016
context-dependent trade-off
fitness component
Dactylorhiza lapponica
non-linear trade-off
reproductive ecology
reproductive effort
2016-05-18T00:00:00Z
2016-05-18T00:00:00Z
en
https://doi.org/10.1111/1365-2745.12430
12772 bytes
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CC0 1.0 Universal (CC0 1.0) Public Domain Dedication
A trade-off between current reproduction and future performance is a key
component of life-history theory, but the shape of this trade-off for any
specific fitness component remains elusive. We induced 3-5 levels of
reproductive effort (RE) by manipulating fruit set of a long-lived orchid
in two populations that differed in the length of the growing season and
local climate, and examined survival, size and fecundity the following
year. Natural fruit set was 72% higher in the long-season population, but
was not associated with a significant survival cost in any population.
Survival decreased linearly with experimentally increased RE in the
short-season population. In both populations, natural RE incurred growth
and fecundity costs, and growth costs increased non-linearly with
diminishing costs at high RE. Fecundity costs increased linearly with RE
in the long-season population, but non-linearly with diminishing costs at
high RE in the other. The results demonstrate that the shape of the cost
function may be non-linear with context-dependent intercept, slope and
curvature. They are consistent with the prediction that survival costs
appear only when RE exceeds natural levels, while growth and fecundity
costs are evident at natural RE. Synthesis. We suggest that studies
inducing multiple levels of RE are required to understand life-history
trade-offs and their context-dependence. This kind of information is
fundamental for an understanding of the link between environmental
heterogeneity, adaptive differentiation and life-history evolution.
Trait means and SDMean and SD of the fitness components survival, growth
and fecundity for the 3-5 reproductive effort treatments in the Sølendet
and Tågdalen populations of Dactylorhiza lapponica.Dryad_Pop_means.xlsx
Central Norway