Developing population models with data from marked individuals. (May 2016)

• Record Type: Journal Article
• Authors: Ryu, Hae Yeong; Shoemaker, Kevin T.; Kneip, Éva; Pidgeon, Anna M.; Heglund, Patricia J.; Bateman, Brooke L.; Thogmartin, Wayne E.; Akçakaya, H. Reşit
• Is Part Of: Biological conservation. Volume 197(2016)
• Page Start: 190
• Page End: 199
• Publication Date: 2016-05
• Subjects: Population viability analysis -- Stage-structured demographic models -- Survival -- Fecundity -- Density-dependence -- Monitoring Avian Productivity and Survivorship (MAPS); Conservation of natural resources -- Periodicals; Nature conservation -- Periodicals; Ecology -- Periodicals; Environment -- Periodicals; Environmental Pollution -- Periodicals; Electronic journals; 333.9516
• DOI: 10.1016/j.biocon.2016.02.031
• Languages: English
• ISSNs: 0006-3207

Abstract

Abstract: Population viability analysis (PVA) is a powerful tool for biodiversity assessments, but its use has been limited because of the requirements for fully specified population models such as demographic structure, density-dependence, environmental stochasticity, and specification of uncertainties. Developing a fully specified population model from commonly available data sources – notably, mark–recapture studies – remains complicated due to lack of practical methods for estimating fecundity, true survival (as opposed to apparent survival), natural temporal variability in both survival and fecundity, density-dependence in the demographic parameters, and uncertainty in model parameters. We present a general method that estimates all the key parameters required to specify a stochastic, matrix-based population model, constructed using a long-term mark–recapture dataset. Unlike standard mark–recapture analyses, our approach provides estimates of true survival rates and fecundities, their respective natural temporal variabilities, and density-dependence functions, making it possible to construct a population model for long-term projection of population dynamics. Furthermore, our method includes a formal quantification of parameter uncertainty for global (multivariate) sensitivity analysis. We apply this approach to 9 bird species and demonstrate the feasibility of using data from the Monitoring Avian Productivity and Survivorship (MAPS) program. Bias-correction factors for raw estimates of survival and fecundity derived from mark–recapture data (apparent survival and juvenile:adult ratio, respectively) were non-negligible, and corrected parameters were generally more biologically reasonable than their uncorrected counterparts. Our method allows the development of fully specified stochastic population models using a single, widely available data source, substantially reducing the barriers that have until now limited the widespread application of PVA. This method is expected to greatly enhance our understanding of the processes underlying population dynamics and our ability to analyze viability and project trends for species of conservation concern. Highlights: We developed a novel method to greatly facilitate species extinction assessments. Our method develops a fully specified model for population viability analyses. Our method uses a single set of data, in a widely used format (mark–recapture). We demonstrate our method with 9 species of North American birds. Our code and datasets are freely available in the code repository GitHub.