2015-09-09

It is well established in theory that short-term environmental fluctuations could affect the long-term growth rates of wildlife populations, but this theory has rarely been tested and there remains little empirical evidence that the effect is actually important in practice. Here we develop models to quantify the effects of daily, seasonal, and yearly temperature fluctuations on the average population growth rates, and we apply them to long-term data on the endangered Black-faced Spoonbill (Platalea minor); an endothermic species whose population growth rates follow a concave relationship with temperature. We demonstrate for the first time that the current levels of temperature variability, particularly seasonal variability, are already large enough to substantially reduce long-term population growth rates. As the climate changes, our results highlight the importance of considering the ecological effects of climate variability and not just average conditions.

Pickett, EJ, Thomson, DL, Li, TA, Xing, S. (2015). Data from: Jensen’s Inequality and the Impact of Short-Term Environmental Variability on Long-Term Population Growth Rates. [Data File]. The authors have included the data and R script as supplemental material of this manuscript.
Click on “Linked Publications” to access the publication and access supporting information on figshare at https://figshare.com/articles/_Jensen_8217_s_Inequality_and_the_Impact_of_Short_Term_Environmental_Variability_on_Long_Term_Population_Growth_Rates_/1538294

climate variability

population growth rates

growth rates

wildlife populations

temperature fluctuations

temperature variability

climate changes