Nathaniel T. Wheelwright
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Divergent climate impacts despite similar response to temperature in a widespread aerial insectivore Open
Climate change is shifting when animals breed 1,2 , but it is still not clear why some populations keep pace with warming while others fall behind 3,4 . Differences could arise from variation in sensitivity to temperature 3 or constraints …
Causes and consequences of within‐population variation in inter‐brood interval of a migratory songbird Open
Many birds produce two broods each year and exhibit significant intra‐population variation in the length of time between the hatching of first and second broods (the inter‐brood interval). Why within‐population variation in inter‐brood int…
Multigenerational fitness outcomes of double-brooding: a 30-year study of a migratory songbird Open
In birds, rearing multiple broods per season can substantially increase the annual number of fledglings produced. However, the contribution of double-brooding to lifetime fitness is unclear because the number of recruits arising from singl…
Population density and timing of breeding mediate effects of early life conditions on recruitment Open
Identifying the factors driving juvenile recruitment is crucial for predicting the response of populations to environmental change. Importantly, how early life conditions carry over to influence recruitment may be highly dependent on the c…
Reduced fitness of secondary females in a polygynous species: a 32-yr study of Savannah sparrows Open
The evolution of mating systems reflects a balance of the often-conflicting interests of males and females. Polygyny, a mating system in which males have multiple mates, presents a fitness benefit to males, but the consequences for females…
View article: The effect of climate change on avian offspring production: A global meta-analysis
The effect of climate change on avian offspring production: A global meta-analysis Open
Climate change affects timing of reproduction in many bird species, but few studies have investigated its influence on annual reproductive output. Here, we assess changes in the annual production of young by female breeders in 201 populati…
View article: Temporal correlations among demographic parameters are ubiquitous but highly variable across species
Temporal correlations among demographic parameters are ubiquitous but highly variable across species Open
Temporal correlations among demographic parameters can strongly influence population dynamics. Our empirical knowledge, however, is very limited regarding the direction and the magnitude of these correlations and how they vary among demogr…
Data from: Natal experience and pre-breeding environmental conditions affect lay date plasticity in Savannah sparrows Open
SummaryThe repository includes the data and R script for performing an analysis of among- and within-individual differences in the timing of first nesting attempts of the year in natal and pre-breeding environmental conditions (see referen…
Fluctuating optimum and temporally variable selection on breeding date in birds and mammals Open
Significance Many ecological and evolutionary processes strongly depend on the way natural selection varies over time. However, a gap remains when trying to connect theoretical predictions to empirical work on this question: Most theory as…
Breeding phenology and performance for four swallows over 57 years: relationships with temperature and precipitation Open
Climate change can drive population declines for many species, often through changes to their food supply. These changes can involve a mis‐timing between periods of high food demand and peak food availability, typically from advances in br…
The rate of telomere loss is related to maximum lifespan in birds Open
Telomeres are highly conserved regions of DNA that protect the ends of linear chromosomes. The loss of telomeres can signal an irreversible change to a cell's state, including cellular senescence. Senescent cells no longer divide and can d…
Winter temperatures limit population growth rate of a migratory songbird Open
Understanding the factors that limit and regulate wildlife populations requires insight into demographic and environmental processes acting throughout the annual cycle. Here, we combine multi-year tracking data of individual birds with a 2…
Eradication of an ecosystem engineer Open
In 1959, Wesley Ingalls captured a dozen snowshoe hares (Lepus americanus; Figure 1) near his home on Grand Manan Island, New Brunswick, Canada. He asked his nephew, Junior, to help transport them to Hay Island, one of the outermost island…