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 |
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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://doaj.org/article/270c2e34a9254480b4a77a75a71f1e5c |
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ftdoajarticles:oai:doaj.org/article:270c2e34a9254480b4a77a75a71f1e5c 2023-10-09T21:50:46+02:00 Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem D. Villanúa X. Cabodevilla J. Ardaiz A. Lizarraga A. Zufiaurre 2023-08-01T00:00:00Z https://doi.org/10.32800/abc.2023.46.0155 https://doaj.org/article/270c2e34a9254480b4a77a75a71f1e5c EN ES eng spa Museu de Ciències Naturals de Barcelona https://raco.cat/index.php/ABC/article/view/419537 https://doaj.org/toc/1578-665X https://doaj.org/toc/2014-928X doi:10.32800/abc.2023.46.0155 1578-665X 2014-928X https://doaj.org/article/270c2e34a9254480b4a77a75a71f1e5c Animal Biodiversity and Conservation, Vol 46, Iss 2 (2023) Agriculture-intensification Census Harrier Steppe Zoology QL1-991 article 2023 ftdoajarticles https://doi.org/10.32800/abc.2023.46.0155 2023-09-24T00:35:41Z 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. Article in Journal/Newspaper Circus cyaneus Aquila chrysaetos golden eagle Directory of Open Access Journals: DOAJ Articles Animal Biodiversity and Conservation 155 163 |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English Spanish |
topic |
Agriculture-intensification Census Harrier Steppe Zoology QL1-991 |
spellingShingle |
Agriculture-intensification Census Harrier Steppe Zoology QL1-991 D. Villanúa X. Cabodevilla J. Ardaiz A. Lizarraga A. Zufiaurre Effect of implementation of irrigation on raptor and corvid populations in a Mediterranean agrosystem |
topic_facet |
Agriculture-intensification Census Harrier Steppe Zoology QL1-991 |
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. |
format |
Article in Journal/Newspaper |
author |
D. Villanúa X. Cabodevilla J. Ardaiz A. Lizarraga A. Zufiaurre |
author_facet |
D. Villanúa X. Cabodevilla J. Ardaiz A. Lizarraga A. Zufiaurre |
author_sort |
D. Villanúa |
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://doaj.org/article/270c2e34a9254480b4a77a75a71f1e5c |
genre |
Circus cyaneus Aquila chrysaetos golden eagle |
genre_facet |
Circus cyaneus Aquila chrysaetos golden eagle |
op_source |
Animal Biodiversity and Conservation, Vol 46, Iss 2 (2023) |
op_relation |
https://raco.cat/index.php/ABC/article/view/419537 https://doaj.org/toc/1578-665X https://doaj.org/toc/2014-928X doi:10.32800/abc.2023.46.0155 1578-665X 2014-928X https://doaj.org/article/270c2e34a9254480b4a77a75a71f1e5c |
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 |
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1779313833715695616 |