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On October 22, 2024, 4:56:23 PM UTC, Gravatar ckan_admin:

  • Changed title to Age- and colony-dependent survival of herring gulls (previously Data from: Spatial patterns in age- and colony-specific survival in a long-lived seabird across 14 contrasting colonies)


  • Updated description of Age- and colony-dependent survival of herring gulls from

    Demographic rates such as recruitment and survival probability can vary considerably among populations of the same species due to variation in underlying environmental processes. If environmental processes are spatially correlated, nearby populations are expected to have more similar demographic rates than those further apart. Breeding populations and foraging ranges are spatially segregated in colonial seabirds, making them ideal for studying spatial patterns in demographic rates and their effects on local population dynamics. Here we explored variation in age-dependent survival probabilities across 14 colonies of Herring Gulls Larus argentatus breeding along the Dutch North Sea coast. We used long-term mark-recapture data of marked fledglings to estimate survival, and estimated spatial autocorrelation of survival probabilities. We assessed whether survival until recruitment age or until 10-years old (close to their expected lifespan) explained variation in population trajectories of each colony. Juvenile and adult survival showed a strong, but different, north-to-south gradient in survival, probability with lower juvenile but higher adult survival in northern colonies than southern colonies, whereas the spatial pattern of immature survival was less distinct. Neither recruitment nor the proportion of 10-year-old adults alive predicted whether a colony collapsed, declined, remained stable or increased. The distinct spatial pattern in survival suggests variation in regional food availability, which do not seem to drive local population dynamics. The absence of a link between survival and colony trajectories implies that connectivity between populations plays an important role affecting population dynamics.
    to
    Demographic rates such as recruitment and survival probability can vary considerably among populations of the same species, possibly due to spatially auto-correlated environmental processes. Breeding populations and foraging ranges are spatially segregated in colonial seabirds, making them ideal to study spatial patterns in demographic rates and their effects on local population dynamics. Here we explored variation in age-dependent survival probabilities across 14 colonies of herring gulls (Larus argentatus) breeding along the Dutch North Sea coast. We used long-term mark-recapture data of marked fledglings to estimate survival, and estimated spatial autocorrelation of survival probabilities. We assessed whether survival until recruitment or until ten years old (their expected lifespan) explained variation in population trajectories of each colony. Juvenile and adult survival showed a strong, but different, north-to-south gradient in survival probability, while the spatial pattern of immature survival was less distinct. Recruitment nor the proportion of 10-year-old adults alive predicted whether a colony collapsed, declined, remained stable or increased. The distinct spatial pattern in survival suggests variation in regional food availability, which do not seem to drive local population dynamics. The absence of a link between survival and colony trajectories implies that connectivity between populations plays an important role affecting population dynamics


  • Added tag r-scripts to Age- and colony-dependent survival of herring gulls


  • Changed the source URL of Age- and colony-dependent survival of herring gulls from https://dataportal.nioz.nl/doi/10.33591/nioz/7b.b.gc to https://dataportal.nioz.nl/doi/10.25850/nioz/7b.b.gc


  • Changed the version of Age- and colony-dependent survival of herring gulls to 1 (previously 5)


  • Changed value of field dataset_persistent_id to DOI:10.25850/nioz/7b.b.gc in Age- and colony-dependent survival of herring gulls