Diving seabirds share foraging space and time within and among species

Masello, Juan; Mundry, Roger; Poisbleau, Maud; Demongin, Laurent; Voigt, Christian C.; Wikelski, Martin; Quillfeldt, Petra

Diving seabirds share foraging space and time within and among species

Dateien

wikelski et al.pdfGröße: 7.17 MBDownloads: 920

Datum

2010

Autor:innen

Masello, Juan

Mundry, Roger

Poisbleau, Maud

Demongin, Laurent

Voigt, Christian C.

Wikelski, Martin

Quillfeldt, Petra

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Ecosphere. 2010, 1(6), art19. ISSN 2150-8925. Available under: doi: 10.1890/ES10-00103.1

Zusammenfassung

Ecological theory predicts that animals with similar foraging strategies should not be able to coexist without segregating either in space, time or diet. In communities, intra-specific competition is thought to be more intense than the competition among species, because of the lack of niche partitioning between conspecifics. Hence, while different seabird species can overlap in their foraging distribution, intra-specific competition can drive the neighboring populations of the same species to spatial segregation of foraging areas. To investigate ecological segregation within and among species of diving seabirds, we used a multispecies GPS-tracking approach of seabirds of four species on a small island in the Southwest Atlantic. The present study goes beyond previous work by analyzing simultaneous effects of species and colonies. We observed strikingly strong spatial foraging segregation among birds of the same species, breeding in colonies as close as 2 km from each other. Conspecifics from neighboring colonies used foraging places adjacent to their own colony, and there was little or no overlap with birds from the other colony. A zone with increased predator concentration was completely avoided during foraging trips, likely contributing to the spatial segregation. In addition to spatial segregation, we also observed intra-specific differences in other components of foraging behavior, such as time of day, dive depth and diet. These were most likely caused by optimal foraging of individuals in relation to habitat differences on a local scale, leading to a complex pattern of interactions with environmental covariates, in particular foraging daytime, foraging water layer temperature and depth, distance to coast and bathymetric depth of foraging areas. As mechanisms leading to the spatial segregation we propose a combination of optimal foraging and avoidance of predation.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Schlagwörter

colonial seabirds, diving seabirds, ecological segregation, foraging ecology

Zitieren

ISO 690

MASELLO, Juan, Roger MUNDRY, Maud POISBLEAU, Laurent DEMONGIN, Christian C. VOIGT, Martin WIKELSKI, Petra QUILLFELDT, 2010. Diving seabirds share foraging space and time within and among species. In: Ecosphere. 2010, 1(6), art19. ISSN 2150-8925. Available under: doi: 10.1890/ES10-00103.1

BibTex

@article{Masello2010Divin-16514,
  year={2010},
  doi={10.1890/ES10-00103.1},
  title={Diving seabirds share foraging space and time within and among species},
  number={6},
  volume={1},
  issn={2150-8925},
  journal={Ecosphere},
  author={Masello, Juan and Mundry, Roger and Poisbleau, Maud and Demongin, Laurent and Voigt, Christian C. and Wikelski, Martin and Quillfeldt, Petra},
  note={Article Number: art19}
}

RDF

<rdf:RDF
    xmlns:dcterms="http://purl.org/dc/terms/"
    xmlns:dc="http://purl.org/dc/elements/1.1/"
    xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
    xmlns:bibo="http://purl.org/ontology/bibo/"
    xmlns:dspace="http://digital-repositories.org/ontologies/dspace/0.1.0#"
    xmlns:foaf="http://xmlns.com/foaf/0.1/"
    xmlns:void="http://rdfs.org/ns/void#"
    xmlns:xsd="http://www.w3.org/2001/XMLSchema#" > 
  <rdf:Description rdf:about="https://kops.uni-konstanz.de/server/rdf/resource/123456789/16514">
    <dc:contributor>Wikelski, Martin</dc:contributor>
    <bibo:uri rdf:resource="http://kops.uni-konstanz.de/handle/123456789/16514"/>
    <dcterms:hasPart rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/16514/1/wikelski%20et%20al.pdf"/>
    <dcterms:title>Diving seabirds share foraging space and time within and among species</dcterms:title>
    <dcterms:issued>2010</dcterms:issued>
    <dc:creator>Masello, Juan</dc:creator>
    <dc:contributor>Mundry, Roger</dc:contributor>
    <dc:creator>Voigt, Christian C.</dc:creator>
    <dcterms:available rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-10-27T12:54:16Z</dcterms:available>
    <foaf:homepage rdf:resource="http://localhost:8080/"/>
    <dc:creator>Wikelski, Martin</dc:creator>
    <dc:language>eng</dc:language>
    <dc:creator>Mundry, Roger</dc:creator>
    <dcterms:isPartOf rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dspace:isPartOfCollection rdf:resource="https://kops.uni-konstanz.de/server/rdf/resource/123456789/28"/>
    <dspace:hasBitstream rdf:resource="https://kops.uni-konstanz.de/bitstream/123456789/16514/1/wikelski%20et%20al.pdf"/>
    <dcterms:bibliographicCitation>First publ. in: Ecosphere ; 1 (2010), 6. - 19</dcterms:bibliographicCitation>
    <dc:creator>Demongin, Laurent</dc:creator>
    <dc:creator>Poisbleau, Maud</dc:creator>
    <dcterms:rights rdf:resource="https://rightsstatements.org/page/InC/1.0/"/>
    <dc:date rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime">2011-10-27T12:54:16Z</dc:date>
    <void:sparqlEndpoint rdf:resource="http://localhost/fuseki/dspace/sparql"/>
    <dc:contributor>Masello, Juan</dc:contributor>
    <dc:contributor>Poisbleau, Maud</dc:contributor>
    <dc:contributor>Voigt, Christian C.</dc:contributor>
    <dc:contributor>Quillfeldt, Petra</dc:contributor>
    <dc:rights>terms-of-use</dc:rights>
    <dc:contributor>Demongin, Laurent</dc:contributor>
    <dc:creator>Quillfeldt, Petra</dc:creator>
    <dcterms:abstract xml:lang="eng">Ecological theory predicts that animals with similar foraging strategies should not be able to coexist without segregating either in space, time or diet. In communities, intra-specific competition is thought to be more intense than the competition among species, because of the lack of niche partitioning between conspecifics. Hence, while different seabird species can overlap in their foraging distribution, intra-specific competition can drive the neighboring populations of the same species to spatial segregation of foraging areas. To investigate ecological segregation within and among species of diving seabirds, we used a multispecies GPS-tracking approach of seabirds of four species on a small island in the Southwest Atlantic. The present study goes beyond previous work by analyzing simultaneous effects of species and colonies. We observed strikingly strong spatial foraging segregation among birds of the same species, breeding in colonies as close as 2 km from each other. Conspecifics from neighboring colonies used foraging places adjacent to their own colony, and there was little or no overlap with birds from the other colony. A zone with increased predator concentration was completely avoided during foraging trips, likely contributing to the spatial segregation. In addition to spatial segregation, we also observed intra-specific differences in other components of foraging behavior, such as time of day, dive depth and diet. These were most likely caused by optimal foraging of individuals in relation to habitat differences on a local scale, leading to a complex pattern of interactions with environmental covariates, in particular foraging daytime, foraging water layer temperature and depth, distance to coast and bathymetric depth of foraging areas. As mechanisms leading to the spatial segregation we propose a combination of optimal foraging and avoidance of predation.</dcterms:abstract>
  </rdf:Description>
</rdf:RDF>

Universitätsbibliographie

Ja