Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem

We analyzed changes in the composition of the community of birds of prey and corvids in a rainfed agrosystem after the transformation of 37.2 % of the sampled area into irrigated land between 2005 and 2020. We sampled 57 transects (372 km per year) and fitted generalized linear mixed models (GLMM) t...

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Authors: Villanúa, D., Cabodevilla, Xabier, Ardaiz, J., Lizarraga, A., Zufiaurre, A.
Format: article
Status:Published version
Publication Date:2023
Country:España
Institution:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
Repository:Recercat. Dipósit de la Recerca de Catalunya
OAI Identifier:oai:recercat.cat:10459.1/463967
Online Access:https://doi.org/10.32800/abc.2023.46.0155
https://hdl.handle.net/10459.1/463967
Access Level:Open access
Keyword:Agriculture-intensification
Census
Harrier
Steppe
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spelling Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystemVillanúa, D.Cabodevilla, XabierArdaiz, J.Lizarraga, A.Zufiaurre, A.Agriculture-intensificationCensusHarrierSteppeWe analyzed changes in the composition of the community of birds of prey and corvids in a rainfed agrosystem after the transformation of 37.2 % of the sampled area into irrigated land between 2005 and 2020. We sampled 57 transects (372 km per year) and fitted generalized linear mixed models (GLMM) to study changes in species occurrence. Our results showed that specific richness and the Shannon index did not vary significantly between rainfed and irrigated transects, but there was a certain positive trend when comparing the years 2005 and 2020. Regarding the differences detected for each species, the occurrence of Montagu’s harrier Circus pygargus, hen harrier Circus cyaneus, Eurasian short-toed eagle Circaetus gallicus, griffon vulture Gyps fulvus and carrion crow Corvus corone was significantly lower in irrigated land than in rainfed land, while magpie Pica pica, Western marsh harrier Circus aeruginosus, common kestrel Falco tinnunculus and black kite Milvus migrans showed a significantly higher occurrence in the irrigated transects. In addition, our findings confirm a significant decrease in occurrence between 2005 and 2020 both in rainfed and irrigated areas for Montagu’s harrier, hen harrier and magpie, while Western marsh harrier, golden eagle Aquila chrysaetos, common buzzard Buteo buteo, red kite Milvus milvus, griffon vulture Gyps fulvus, red-billed chough Pyrrhocorax pyrrhocorax and Western jackdaw Coloeus monedula were detected significantly more frequently in 2020 than in 2005. These results suggest that assessment of the impact of a new irrigation system should focus on the most characteristic species of rainfed agrosystems because the apparently positive effect on other species, equally protected but more generalist, may mask the real effect on conservation.Both the field work, the data analysis and writing of the manuscript were carried out without any type of financial supportMuseu de Ciències Naturals de Barcelona2023info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttps://doi.org/10.32800/abc.2023.46.0155https://hdl.handle.net/10459.1/463967reponame:Recercat. Dipósit de la Recerca de Catalunyainstname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)InglésReproducció del document publicat a http://doi.org/10.32800/abc.2023.46.0155Animal Biodiversity and Conservation, 2023, vol. 46, núm. 2, p. 1-10cc-by (c) The Authors, 2023Attribution 4.0 Internationalinfo:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by/4.0/oai:recercat.cat:10459.1/4639672026-05-29T05:05:01Z
dc.title.none.fl_str_mv Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
title Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
spellingShingle Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
Villanúa, D.
Agriculture-intensification
Census
Harrier
Steppe
title_short Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
title_full Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
title_fullStr Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
title_full_unstemmed Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
title_sort Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem
dc.creator.none.fl_str_mv Villanúa, D.
Cabodevilla, Xabier
Ardaiz, J.
Lizarraga, A.
Zufiaurre, A.
author Villanúa, D.
author_facet Villanúa, D.
Cabodevilla, Xabier
Ardaiz, J.
Lizarraga, A.
Zufiaurre, A.
author_role author
author2 Cabodevilla, Xabier
Ardaiz, J.
Lizarraga, A.
Zufiaurre, A.
author2_role author
author
author
author
dc.subject.none.fl_str_mv Agriculture-intensification
Census
Harrier
Steppe
topic Agriculture-intensification
Census
Harrier
Steppe
description We analyzed changes in the composition of the community of birds of prey and corvids in a rainfed agrosystem after the transformation of 37.2 % of the sampled area into irrigated land between 2005 and 2020. We sampled 57 transects (372 km per year) and fitted generalized linear mixed models (GLMM) to study changes in species occurrence. Our results showed that specific richness and the Shannon index did not vary significantly between rainfed and irrigated transects, but there was a certain positive trend when comparing the years 2005 and 2020. Regarding the differences detected for each species, the occurrence of Montagu’s harrier Circus pygargus, hen harrier Circus cyaneus, Eurasian short-toed eagle Circaetus gallicus, griffon vulture Gyps fulvus and carrion crow Corvus corone was significantly lower in irrigated land than in rainfed land, while magpie Pica pica, Western marsh harrier Circus aeruginosus, common kestrel Falco tinnunculus and black kite Milvus migrans showed a significantly higher occurrence in the irrigated transects. In addition, our findings confirm a significant decrease in occurrence between 2005 and 2020 both in rainfed and irrigated areas for Montagu’s harrier, hen harrier and magpie, while Western marsh harrier, golden eagle Aquila chrysaetos, common buzzard Buteo buteo, red kite Milvus milvus, griffon vulture Gyps fulvus, red-billed chough Pyrrhocorax pyrrhocorax and Western jackdaw Coloeus monedula were detected significantly more frequently in 2020 than in 2005. These results suggest that assessment of the impact of a new irrigation system should focus on the most characteristic species of rainfed agrosystems because the apparently positive effect on other species, equally protected but more generalist, may mask the real effect on conservation.
publishDate 2023
dc.date.none.fl_str_mv 2023
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/10.32800/abc.2023.46.0155
https://hdl.handle.net/10459.1/463967
url https://doi.org/10.32800/abc.2023.46.0155
https://hdl.handle.net/10459.1/463967
dc.language.none.fl_str_mv Inglés
language_invalid_str_mv Inglés
dc.relation.none.fl_str_mv Reproducció del document publicat a http://doi.org/10.32800/abc.2023.46.0155
Animal Biodiversity and Conservation, 2023, vol. 46, núm. 2, p. 1-10
dc.rights.none.fl_str_mv cc-by (c) The Authors, 2023
Attribution 4.0 International
info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by/4.0/
rights_invalid_str_mv cc-by (c) The Authors, 2023
Attribution 4.0 International
http://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
dc.publisher.none.fl_str_mv Museu de Ciències Naturals de Barcelona
publisher.none.fl_str_mv Museu de Ciències Naturals de Barcelona
dc.source.none.fl_str_mv reponame:Recercat. Dipósit de la Recerca de Catalunya
instname:Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
instname_str Varias* (Consorci de Biblioteques Universitáries de Catalunya, Centre de Serveis Científics i Acadèmics de Catalunya)
reponame_str Recercat. Dipósit de la Recerca de Catalunya
collection Recercat. Dipósit de la Recerca de Catalunya
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 15,812429

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