Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season
Cover photo: A male Lapland Longspur Calcarius lapponicus. Photo: Terje Lislevand. Stomach samples of Lapland Longspur Calcarius lapponicus, Snow Bunting Plectrophenax nivalis, and Horned Lark Eremophila alpestris were collected at Hardangervidda in an early phase of the breeding season (during egg-...
Main Authors: | , , , |
---|---|
Format: | Article in Journal/Newspaper |
Language: | English |
Published: |
BirdLife Norway
2022
|
Subjects: | |
Online Access: | https://boap.uib.no/index.php/ornis/article/view/3639 |
id |
ftboapojs:oai:boap.uib.no:article/3639 |
---|---|
record_format |
openpolar |
spelling |
ftboapojs:oai:boap.uib.no:article/3639 2023-06-11T04:11:28+02:00 Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season Byrkjedal, Ingvar Fjeldheim, Vegard Bang Halvorsen, Lene Synnøve Lislevand, Terje 2022-12-05 application/pdf https://boap.uib.no/index.php/ornis/article/view/3639 eng eng BirdLife Norway https://boap.uib.no/index.php/ornis/article/view/3639/3567 https://boap.uib.no/index.php/ornis/article/view/3639 Copyright (c) 2022 Ingvar Byrkjedal, Vegard Bang Fjeldheim, Lene Synnøve Halvorsen, Terje Lislevand https://creativecommons.org/licenses/by/4.0 Ornis Norvegica; Vol 45 (2022); 16-26 Climate change diet composition interspecific competition mountain birds niche overlap info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2022 ftboapojs 2023-04-26T22:39:29Z Cover photo: A male Lapland Longspur Calcarius lapponicus. Photo: Terje Lislevand. Stomach samples of Lapland Longspur Calcarius lapponicus, Snow Bunting Plectrophenax nivalis, and Horned Lark Eremophila alpestris were collected at Hardangervidda in an early phase of the breeding season (during egg-laying and onset of incubation) in 1974. Our analyses of diet composition found that plant material, mainly seeds, made up 90, 95 and 97% by number of items, and 49, 66 and 83% by dry mass, in the diets of Lapland Longspur, Horned Lark, and Snow Bunting, respectively. Seeds of Potentilla, Luzula, different Caryophyllaceae, and Omalotheca were important foods for all three species. Seeds of Empetrum were only found in longspurs and buntings, and fragments of Bryophyta were abundant only in the Horned Larks. Arthropoda were dominated by adult Coleoptera (in particular Patrobus spp., Helophorus glacialis, and Otiorrhynchus dubius) and Diptera larvae (notably Tipulidae), and were taken by all three species in small quantities by number of items but made up 51, 34 and 17% by dry mass in the diets of Lapland Longspur, Horned Lark, and Snow Bunting. Food overlap compared asymmetrically between the species ranged from 0.49 to 0.74 by number of items and from 0.43 to 0.74 by dry mass (scale from 0 to 1.0). Recent population declines in Lapland Longspur and Snow Bunting but increases in Horned Larks may have affected interspecific food competition among the three species early in the breeding season. The food overlap has presumably increased over the last decades due to a longer-lasting snow cover over the nesting habitats of longspurs and buntings which has been a result of increased precipitation due to climate change. Article in Journal/Newspaper Eremophila alpestris Plectrophenax nivalis Snow Bunting Lapland Bergen Open Access Publishing (University of Bergen Library) |
institution |
Open Polar |
collection |
Bergen Open Access Publishing (University of Bergen Library) |
op_collection_id |
ftboapojs |
language |
English |
topic |
Climate change diet composition interspecific competition mountain birds niche overlap |
spellingShingle |
Climate change diet composition interspecific competition mountain birds niche overlap Byrkjedal, Ingvar Fjeldheim, Vegard Bang Halvorsen, Lene Synnøve Lislevand, Terje Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
topic_facet |
Climate change diet composition interspecific competition mountain birds niche overlap |
description |
Cover photo: A male Lapland Longspur Calcarius lapponicus. Photo: Terje Lislevand. Stomach samples of Lapland Longspur Calcarius lapponicus, Snow Bunting Plectrophenax nivalis, and Horned Lark Eremophila alpestris were collected at Hardangervidda in an early phase of the breeding season (during egg-laying and onset of incubation) in 1974. Our analyses of diet composition found that plant material, mainly seeds, made up 90, 95 and 97% by number of items, and 49, 66 and 83% by dry mass, in the diets of Lapland Longspur, Horned Lark, and Snow Bunting, respectively. Seeds of Potentilla, Luzula, different Caryophyllaceae, and Omalotheca were important foods for all three species. Seeds of Empetrum were only found in longspurs and buntings, and fragments of Bryophyta were abundant only in the Horned Larks. Arthropoda were dominated by adult Coleoptera (in particular Patrobus spp., Helophorus glacialis, and Otiorrhynchus dubius) and Diptera larvae (notably Tipulidae), and were taken by all three species in small quantities by number of items but made up 51, 34 and 17% by dry mass in the diets of Lapland Longspur, Horned Lark, and Snow Bunting. Food overlap compared asymmetrically between the species ranged from 0.49 to 0.74 by number of items and from 0.43 to 0.74 by dry mass (scale from 0 to 1.0). Recent population declines in Lapland Longspur and Snow Bunting but increases in Horned Larks may have affected interspecific food competition among the three species early in the breeding season. The food overlap has presumably increased over the last decades due to a longer-lasting snow cover over the nesting habitats of longspurs and buntings which has been a result of increased precipitation due to climate change. |
format |
Article in Journal/Newspaper |
author |
Byrkjedal, Ingvar Fjeldheim, Vegard Bang Halvorsen, Lene Synnøve Lislevand, Terje |
author_facet |
Byrkjedal, Ingvar Fjeldheim, Vegard Bang Halvorsen, Lene Synnøve Lislevand, Terje |
author_sort |
Byrkjedal, Ingvar |
title |
Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
title_short |
Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
title_full |
Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
title_fullStr |
Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
title_full_unstemmed |
Diet of three sympatric species of granivorous songbirds in a Norwegian high mountain area during the early breeding season |
title_sort |
diet of three sympatric species of granivorous songbirds in a norwegian high mountain area during the early breeding season |
publisher |
BirdLife Norway |
publishDate |
2022 |
url |
https://boap.uib.no/index.php/ornis/article/view/3639 |
genre |
Eremophila alpestris Plectrophenax nivalis Snow Bunting Lapland |
genre_facet |
Eremophila alpestris Plectrophenax nivalis Snow Bunting Lapland |
op_source |
Ornis Norvegica; Vol 45 (2022); 16-26 |
op_relation |
https://boap.uib.no/index.php/ornis/article/view/3639/3567 https://boap.uib.no/index.php/ornis/article/view/3639 |
op_rights |
Copyright (c) 2022 Ingvar Byrkjedal, Vegard Bang Fjeldheim, Lene Synnøve Halvorsen, Terje Lislevand https://creativecommons.org/licenses/by/4.0 |
_version_ |
1768386552622219264 |