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...
Published in: | Animal Biodiversity and Conservation |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Museu de Ciències Naturals de Barcelona
2023
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Online Access: | https://doi.org/10.32800/abc.2023.46.0155 https://repositori.udl.cat/handle/10459.1/463967 |
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ftunivlleida:oai:repositori.udl.cat:10459.1/463967 2024-05-19T07:39:02+00:00 Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem Villanúa, D. Cabodevilla, Xabier Ardaiz, J. Lizarraga, A. Zufiaurre, A. 2023-09-13T09:44:43Z https://doi.org/10.32800/abc.2023.46.0155 https://repositori.udl.cat/handle/10459.1/463967 eng eng Museu de Ciències Naturals de Barcelona 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 https://doi.org/10.32800/abc.2023.46.0155 2014-928X https://repositori.udl.cat/handle/10459.1/463967 cc-by (c) The Authors, 2023 Attribution 4.0 International info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ Agriculture-intensification Census Harrier Steppe info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2023 ftunivlleida https://doi.org/10.32800/abc.2023.46.0155 2024-04-23T23:40:40Z 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. Both the field work, the data analysis and writing of the manuscript were carried out without any type of financial support Article in Journal/Newspaper Circus cyaneus Aquila chrysaetos golden eagle Universitat de Lleida: Repositori Obert UdL Animal Biodiversity and Conservation 155 163 |
institution |
Open Polar |
collection |
Universitat de Lleida: Repositori Obert UdL |
op_collection_id |
ftunivlleida |
language |
English |
topic |
Agriculture-intensification Census Harrier Steppe |
spellingShingle |
Agriculture-intensification Census Harrier Steppe Villanúa, D. Cabodevilla, Xabier Ardaiz, J. Lizarraga, A. Zufiaurre, A. Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem |
topic_facet |
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. Both the field work, the data analysis and writing of the manuscript were carried out without any type of financial support |
format |
Article in Journal/Newspaper |
author |
Villanúa, D. Cabodevilla, Xabier Ardaiz, J. Lizarraga, A. Zufiaurre, A. |
author_facet |
Villanúa, D. Cabodevilla, Xabier Ardaiz, J. Lizarraga, A. Zufiaurre, A. |
author_sort |
Villanúa, D. |
title |
Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem |
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 |
publisher |
Museu de Ciències Naturals de Barcelona |
publishDate |
2023 |
url |
https://doi.org/10.32800/abc.2023.46.0155 https://repositori.udl.cat/handle/10459.1/463967 |
genre |
Circus cyaneus Aquila chrysaetos golden eagle |
genre_facet |
Circus cyaneus Aquila chrysaetos golden eagle |
op_relation |
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 https://doi.org/10.32800/abc.2023.46.0155 2014-928X https://repositori.udl.cat/handle/10459.1/463967 |
op_rights |
cc-by (c) The Authors, 2023 Attribution 4.0 International info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.32800/abc.2023.46.0155 |
container_title |
Animal Biodiversity and Conservation |
container_start_page |
155 |
op_container_end_page |
163 |
_version_ |
1799478559548375040 |