Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape
Abstract This study investigated the dietary niche of the Barn Owl (Tyto alba) in an intensively farmed landscape, based on pellet samples from 12 nesting pairs containing 25 animal taxa and 1,994 prey items after the breeding season in 2016. Based on land use categories of the buffer area around ea...
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Walter de Gruyter GmbH
2018
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crdegruyter:10.1515/orhu-2018-0002 2024-10-06T13:48:03+00:00 Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape Horváth, Adrienn Morvai, Anita Horváth, Győző F. 2018 http://dx.doi.org/10.1515/orhu-2018-0002 http://content.sciendo.com/view/journals/orhu/26/1/article-p27.xml https://www.sciendo.com/article/10.1515/orhu-2018-0002 en eng Walter de Gruyter GmbH http://creativecommons.org/licenses/by-nc-nd/4.0 Ornis Hungarica volume 26, issue 1, page 27-40 ISSN 2061-9588 journal-article 2018 crdegruyter https://doi.org/10.1515/orhu-2018-0002 2024-09-09T04:19:37Z Abstract This study investigated the dietary niche of the Barn Owl (Tyto alba) in an intensively farmed landscape, based on pellet samples from 12 nesting pairs containing 25 animal taxa and 1,994 prey items after the breeding season in 2016. Based on land use categories of the buffer area around each nest, three landscape types (agricultural, mosaic, urban) were considered, to analyse the diet composition and food-niche parameters. Niche breadth was calculated at the local and landscape level. Small mammals were the most frequent in the diet than other prey in each of the landscape types. The Common Vole (Microtus arvalis) , considered to be an important agricultural pest was the most numerous prey in all landscape groups. The trophic niche of Barn Owl varied between 0.69 – 0.86 at the local level, and the overall value of niche breadth was significantly higher in the urban than in the other two landscape types. Our results showed that the increase of Common Vole frequency lead to a decrease in niche breadth; significantly negative relationship was detected between these parameters. Despite differences in niche breadth, similarly high niche overlaps were detected by the randomisation test in the three landscapes. Our results suggest that the diet composition of Barn Owls, mainly their food-niche pattern, reflected prey availability in the comparison of the studied landscapes, which pointed out that it is necessary to examine the dietary difference of Barn Owls at the finer scale of land use. Article in Journal/Newspaper Common vole Microtus arvalis De Gruyter Ornis Hungarica 26 1 27 40 |
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English |
description |
Abstract This study investigated the dietary niche of the Barn Owl (Tyto alba) in an intensively farmed landscape, based on pellet samples from 12 nesting pairs containing 25 animal taxa and 1,994 prey items after the breeding season in 2016. Based on land use categories of the buffer area around each nest, three landscape types (agricultural, mosaic, urban) were considered, to analyse the diet composition and food-niche parameters. Niche breadth was calculated at the local and landscape level. Small mammals were the most frequent in the diet than other prey in each of the landscape types. The Common Vole (Microtus arvalis) , considered to be an important agricultural pest was the most numerous prey in all landscape groups. The trophic niche of Barn Owl varied between 0.69 – 0.86 at the local level, and the overall value of niche breadth was significantly higher in the urban than in the other two landscape types. Our results showed that the increase of Common Vole frequency lead to a decrease in niche breadth; significantly negative relationship was detected between these parameters. Despite differences in niche breadth, similarly high niche overlaps were detected by the randomisation test in the three landscapes. Our results suggest that the diet composition of Barn Owls, mainly their food-niche pattern, reflected prey availability in the comparison of the studied landscapes, which pointed out that it is necessary to examine the dietary difference of Barn Owls at the finer scale of land use. |
format |
Article in Journal/Newspaper |
author |
Horváth, Adrienn Morvai, Anita Horváth, Győző F. |
spellingShingle |
Horváth, Adrienn Morvai, Anita Horváth, Győző F. Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
author_facet |
Horváth, Adrienn Morvai, Anita Horváth, Győző F. |
author_sort |
Horváth, Adrienn |
title |
Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
title_short |
Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
title_full |
Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
title_fullStr |
Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
title_full_unstemmed |
Food-niche pattern of the Barn Owl(Tyto alba)in intensively cultivated agricultural landscape |
title_sort |
food-niche pattern of the barn owl(tyto alba)in intensively cultivated agricultural landscape |
publisher |
Walter de Gruyter GmbH |
publishDate |
2018 |
url |
http://dx.doi.org/10.1515/orhu-2018-0002 http://content.sciendo.com/view/journals/orhu/26/1/article-p27.xml https://www.sciendo.com/article/10.1515/orhu-2018-0002 |
genre |
Common vole Microtus arvalis |
genre_facet |
Common vole Microtus arvalis |
op_source |
Ornis Hungarica volume 26, issue 1, page 27-40 ISSN 2061-9588 |
op_rights |
http://creativecommons.org/licenses/by-nc-nd/4.0 |
op_doi |
https://doi.org/10.1515/orhu-2018-0002 |
container_title |
Ornis Hungarica |
container_volume |
26 |
container_issue |
1 |
container_start_page |
27 |
op_container_end_page |
40 |
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1812176207625584640 |