Abstract

In recent times metapopulation models have contributed important insights to conservation, and they have inspired field studies that focus on collecting key data on demography and movement. Seabirds are suitable models for studying ecological processes in metapopulations because they breed in discrete local populations (i.e. colonies) both in space and time. However, in the Mediterranean, seabird colonies mostly show conservation problems at an ecosystem level, linked to human activities (e.g. fisheries, tourism, industrial pollution) and the resulting loss of habitat and deterioration of habitat quality. From a conservation point of view, it is crucial to study transfer processes in seabird metapopulations (i.e. emigration, immigration and colonisation) in order to propose management measures. Conservation agencies should always take into account these processes and the spatial factor involved in metapopulation dynamics. However, it is difficult to estimate demographic parameters at a metapopulation level because of technical and financial constraints. In addition, there is a need to act at large geographical scales, since seabirds are wide-ranging species, which operate in ranges beyond political boundaries and far greater than those encompassed by traditional management practices.

Highlights

  • SUMMARY: In recent times metapopulation models have contributed important insights to conservation, and they have inspired field studies that focus on collecting key data on demography and movement

  • Seabirds are suitable models for studying ecological processes in metapopulations because they breed in discrete local populations both in space and time

  • Conservation agencies should always take into account these processes and the spatial factor involved in metapopulation dynamics

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Summary

DANIEL ORO

Institut Mediterrani d’Estudis Avançats IMEDEA (CSIC-UIB), Miquel Marques 21, 07190 Esporles, Mallorca, Spain. Seabirds are suitable models for studying ecological processes in metapopulations because they breed in discrete local populations (i.e. colonies) both in space and time. From a conservation point of view, it is crucial to study transfer processes in seabird metapopulations (i.e. emigration, immigration and colonisation) in order to propose management measures. Las aves marinas son modelos apropiados para estudiar procesos ecológicos en metapoblaciones ya que crían en poblaciones locales discretas (i.e. colonias) tanto en el espacio como en el tiempo. En el Mediterráneo, además, las colonias de aves marinas suelen presentar problemas de conservación al nivel de ecosistema, principalmente relacionados con las actividades humanas Desde el punto de vista de la conservación, es crucial estudiar los procesos de transferencia en metapoblaciones de aves marinas (i.e. emigración, inmigración y colonización) para proponer medidas de manejo. Palabras clave: metapoblación, conservación, dispersión, procesos de transferencia, criterios de gestión, investigación, efecto rescate, captura-recaptura, Mediterráneo

INTRODUCTION
Flat sandy dunes
Steep volcanic rocks
Breeding dispersal from the Delta
Cabrera Archipelago
SEABIRD METAPOPULATIONS
CONSTRAINTS OF MANAGING SEABIRD
Findings
Ebro Delta colony at metapopulation level in the western
Full Text
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