Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird

Interspecific competition is a dominant force in animal communities that induces niche shifts in ecological and evolutionary time. If competition occurs, niche expansion can be expected when the competitor disappears because resources previously inaccessible due to competitive constraints can then b...

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Autores: Tarjuelo, Rocío, Morales, Manuel B., Arroyo, Beatriz, Mañosa, Santi, Bota, Gerard, Casas, Fabian, Traba, Juan
Tipo de recurso: artículo
Estado:Versión publicada
Fecha de publicación:2017
País:España
Institución:Universitat de Lleida (UdL)
Repositorio:Repositori Obert UdL
OAI Identifier:oai:repositori.udl.cat:10459.1/68990
Acceso en línea:https://doi.org/10.1002/ece3.3444
http://hdl.handle.net/10459.1/68990
Access Level:acceso abierto
Palabra clave:Ecological release
Kernel density estimators
Otis tarda
Species coexistence
Tetrax tetrax
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spelling Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe birdTarjuelo, RocíoMorales, Manuel B.Arroyo, BeatrizMañosa, SantiBota, GerardCasas, FabianTraba, JuanEcological releaseKernel density estimatorsOtis tardaSpecies coexistenceTetrax tetraxInterspecific competition is a dominant force in animal communities that induces niche shifts in ecological and evolutionary time. If competition occurs, niche expansion can be expected when the competitor disappears because resources previously inaccessible due to competitive constraints can then be exploited (i.e., ecological release). Here, we aimed to determine the potential effects of interspecific competition between the little bustard (Tetrax tetrax ) and the great bustard (Otis tarda ) using a multidimensional niche approach with habitat distribution data. We explored whether the degree of niche overlap between the species was a density‐dependent function of interspecific competition. We then looked for evidences of ecological release by comparing measures of niche breadth and position of the little bustard between allopatric and sympatric situations. Furthermore, we evaluated whether niche shifts could depend not only on the presence of great bustard but also on the density of little and great bustards. The habitat niches of these bustard species partially overlapped when co‐occurring, but we found no relationship between degree of overlap and great bustard density. In the presence of the competitor, little bustard's niche was displaced toward increased use of the species' primary habitat. Little bustard's niche breadth decreased proportionally with great bustard density in sympatric sites, in consistence with theory. Overall, our results suggest that density‐dependent variation in little bustard's niche is the outcome of interspecific competition with the great bustard. The use of computational tools like kernel density estimators to obtain multidimensional niches should bring novel insights on how species' ecological niches behave under the effects of interspecific competition in ecological communities.Belianes and Bellmunt fieldwork was financed by REGSEGA (Regs Sistema Segarra‐Garrigues), Departament de Medi Ambient i Habitatge (Generalitat de Catalunya). Funding was also provided by the Spanish Ministry of Science (CGL2009‐13029/BOS); the REMEDINAL2 and REMEDINAL3 networks of the CAM (S‐2009/AMB/1783 and S2013/MAE‐2719). R.T. was supported by a PhD grant from the Spanish Minister of Education (FPU grant no. AP2009‐0762) and a postdoctoral fellowship funded by REMEDINAL3 (S2013/MAE‐2719). FC was supported by the Andalucía Talent Hub Program launched by the Andalusian Knowledge Agency, cofounded by the European Union's Seventh Framework Program, Marie Skłodowska‐Curie actions (COFUND–Grant Agreement n° 291780) and the Ministry of Economy, Innovation, Science and Employment of the Junta de Andalucía.Wiley2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.1002/ece3.3444http://hdl.handle.net/10459.1/68990reponame:Repositori Obert UdL instname:Universitat de Lleida (UdL)Inglésinfo:eu-repo/grantAgreement/MINECO//CGL2009-13029%2FBOSReproducció del document publicat a: https://doi.org/10.1002/ece3.3444Ecology and Evolution, 2017, vol. 7, núm. 22, p. 9720-9730info:eu-repo/grantAgreement/EC/FP7/291780cc-by (c) Tarjuelo, Rocío et al., 2017info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:repositori.udl.cat:10459.1/689902026-06-24T12:42:17Z
dc.title.none.fl_str_mv Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
title Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
spellingShingle Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
Tarjuelo, Rocío
Ecological release
Kernel density estimators
Otis tarda
Species coexistence
Tetrax tetrax
title_short Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
title_full Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
title_fullStr Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
title_full_unstemmed Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
title_sort Intraspecific and interspecific competition induces density‐dependent habitat niche shifts in an endangered steppe bird
dc.creator.none.fl_str_mv Tarjuelo, Rocío
Morales, Manuel B.
Arroyo, Beatriz
Mañosa, Santi
Bota, Gerard
Casas, Fabian
Traba, Juan
author Tarjuelo, Rocío
author_facet Tarjuelo, Rocío
Morales, Manuel B.
Arroyo, Beatriz
Mañosa, Santi
Bota, Gerard
Casas, Fabian
Traba, Juan
author_role author
author2 Morales, Manuel B.
Arroyo, Beatriz
Mañosa, Santi
Bota, Gerard
Casas, Fabian
Traba, Juan
author2_role author
author
author
author
author
author
dc.subject.none.fl_str_mv Ecological release
Kernel density estimators
Otis tarda
Species coexistence
Tetrax tetrax
topic Ecological release
Kernel density estimators
Otis tarda
Species coexistence
Tetrax tetrax
description Interspecific competition is a dominant force in animal communities that induces niche shifts in ecological and evolutionary time. If competition occurs, niche expansion can be expected when the competitor disappears because resources previously inaccessible due to competitive constraints can then be exploited (i.e., ecological release). Here, we aimed to determine the potential effects of interspecific competition between the little bustard (Tetrax tetrax ) and the great bustard (Otis tarda ) using a multidimensional niche approach with habitat distribution data. We explored whether the degree of niche overlap between the species was a density‐dependent function of interspecific competition. We then looked for evidences of ecological release by comparing measures of niche breadth and position of the little bustard between allopatric and sympatric situations. Furthermore, we evaluated whether niche shifts could depend not only on the presence of great bustard but also on the density of little and great bustards. The habitat niches of these bustard species partially overlapped when co‐occurring, but we found no relationship between degree of overlap and great bustard density. In the presence of the competitor, little bustard's niche was displaced toward increased use of the species' primary habitat. Little bustard's niche breadth decreased proportionally with great bustard density in sympatric sites, in consistence with theory. Overall, our results suggest that density‐dependent variation in little bustard's niche is the outcome of interspecific competition with the great bustard. The use of computational tools like kernel density estimators to obtain multidimensional niches should bring novel insights on how species' ecological niches behave under the effects of interspecific competition in ecological communities.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.none.fl_str_mv https://doi.org/10.1002/ece3.3444
http://hdl.handle.net/10459.1/68990
url https://doi.org/10.1002/ece3.3444
http://hdl.handle.net/10459.1/68990
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv info:eu-repo/grantAgreement/MINECO//CGL2009-13029%2FBOS
Reproducció del document publicat a: https://doi.org/10.1002/ece3.3444
Ecology and Evolution, 2017, vol. 7, núm. 22, p. 9720-9730
info:eu-repo/grantAgreement/EC/FP7/291780
dc.rights.none.fl_str_mv cc-by (c) Tarjuelo, Rocío et al., 2017
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) Tarjuelo, Rocío et al., 2017
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Wiley
publisher.none.fl_str_mv Wiley
dc.source.none.fl_str_mv reponame:Repositori Obert UdL
instname:Universitat de Lleida (UdL)
instname_str Universitat de Lleida (UdL)
reponame_str Repositori Obert UdL
collection Repositori Obert UdL
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15.812429

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