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Related Experiment Video

Updated: Sep 28, 2025

Development of New Methods for Quantifying Fish Density Using Underwater Stereo-video Tools
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Demographic variation in space and time: implications for conservation targeting.

Catriona A Morrison1, Simon J Butler1, Jacquie A Clark2

  • 1School of Biological Sciences, University of East Anglia, Norwich Research Park, Norwich NR4 7TJ, UK.

Royal Society Open Science
|April 1, 2022
PubMed
Summary

Wild bird populations show distinct demographic patterns: productivity varies by location, while survival varies by year. Understanding these spatial and temporal variations aids targeted conservation efforts for declining species.

Keywords:
conservation actionsdemographypopulation declinesproductivitysurvival rates

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Area of Science:

  • Ecology
  • Conservation Biology
  • Population Dynamics

Background:

  • Wild population dynamics depend on demographic rates (birth, death, etc.) influenced by environmental factors.
  • Conservation strategies for declining species can leverage spatial or temporal variations in demographic rates if these variations are consistent.
  • Understanding demographic rate variation is crucial for effective wildlife management and conservation policy.

Purpose of the Study:

  • To investigate the spatial and temporal variation in demographic rates of wild bird populations.
  • To determine if spatial or temporal variations in demographic rates are consistent across years or sites.
  • To assess the potential for targeted conservation actions based on identified demographic patterns.

Main Methods:

  • Analysis of long-term demographic data for wild bird populations across Europe.
  • Decomposition of spatio-temporal variation in demographic rates (productivity and survival).
  • Assessment of spatial synchrony in demographic rates.

Main Results:

  • Productivity rates consistently varied across different sites over the years.
  • Survival rates consistently varied across different years at the same sites.
  • Spatial synchrony was more prevalent in survival rates than in productivity rates.

Conclusions:

  • Consistent spatial variation in productivity suggests potential for site-targeted conservation actions.
  • Consistent temporal variation in survival suggests potential for time-targeted conservation actions, though less feasible.
  • Analyzing spatio-temporal demographic variation provides insights for effective conservation policy and action scales.