Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway

<!DOCTYPE html> <html lang="en-US" xml:lang="en-US"> <head> <meta charset="utf-8"> <meta name="viewport" content="width=device-width, initial-scale=1.0"> <title> Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway | Ornis Norvegica </title> <link rel="icon" href="https://boap.uib.no/public/journals/25/favicon_en_US.png"> <meta name="generator" content="Open Journal Systems 3.3.0.17"> <meta name="gs_meta_revision" content="1.1"/> <meta name="citation_journal_title" content="Ornis Norvegica"/> <meta name="citation_journal_abbrev" content="Ornis Norv."/> <meta name="citation_issn" content="1892-9737"/> <meta name="citation_author" content="Thomas Sæther"/> <meta name="citation_author_institution" content="1) Nordre Øyeren Bird Observatory. 2) Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo"/> <meta name="citation_author" content="Trude Starholm"/> <meta name="citation_author_institution" content="1) Nordre Øyeren Bird Observatory. 2) Museums in Akershus, Visitor Centre Wetland Nordre Øyeren"/> <meta name="citation_author" content="Erling Hobøl"/> <meta name="citation_author_institution" content="Nordre Øyeren Bird Observatory"/> <meta name="citation_title" content="Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway"/> <meta name="citation_language" content="en"/> <meta name="citation_date" content="2024/03/20"/> <meta name="citation_volume" content="47"/> <meta name="citation_firstpage" content="13"/> <meta name="citation_lastpage" content="24"/> <meta name="citation_doi" content="10.15845/on.v47.3953"/> <meta name="citation_abstract_html_url" content="https://boap.uib.no/index.php/ornis/article/view/3953"/> <meta name="citation_keywords" xml:lang="en" content="grazing "/> <meta name="citation_keywords" xml:lang="en" content="maximum counts "/> <meta name="citation_keywords" xml:lang="en" content="population change"/> <meta name="citation_keywords" xml:lang="en" content="territory mapping"/> <meta name="citation_keywords" xml:lang="en" content="red list"/> <meta name="citation_pdf_url" content="https://boap.uib.no/index.php/ornis/article/download/3953/3792"/> <meta name="citation_reference" content="Akershus fylkeskommune. 2002. 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The Reed Bunting Emberiza schoeniclus is considered the most common of the five species of Emberiza buntings breeding in Norway and is currently listed as a species of Least Concern. However, a complete census of territorial male Reed Buntings conducted in the Nordre Øyeren nature reserve in 2019 showed a decline in the local breeding population of 67% compared to the last counts completed 40 years ago. Censuses were conducted in 1976 and 1981 in the same area and with the same methods. Analyses of citizen science data from the Norwegian Biodiversity Information Centre also show a similar decreasing trend (-66%) for the Reed Bunting breeding population in Nordre Øyeren from 1976 to 2019. Moreover, image analyses of the census maps show that that the number and density of Reed Bunting territories have decreased locally and probably has done so since early 1980s. Interestingly, a subset of localities within the survey area still have the same territory densities as the 1976 and 1981 censuses. We suggest that changes in habitat, vegetation and farming practice, especially grazing, could be the underlying cause of variation in bird numbers. Our results indicate a negative population trend for the Reed Bunting locally, a tendency that is also observed regionally in the Nordic countries. Taken together, local and regional declines raise concerns about the conservation status of the Reed Bunting in Norway."/> <meta name="DC.Format" scheme="IMT" content="application/pdf"/> <meta name="DC.Identifier" content="3953"/> <meta name="DC.Identifier.pageNumber" content="13-24"/> <meta name="DC.Identifier.DOI" content="10.15845/on.v47.3953"/> <meta name="DC.Identifier.URI" content="https://boap.uib.no/index.php/ornis/article/view/3953"/> <meta name="DC.Language" scheme="ISO639-1" content="en"/> <meta name="DC.Rights" content="Copyright (c) 2024 Thomas Sæther, Trude Starholm, Erling Hobøl"/> <meta name="DC.Rights" content="https://creativecommons.org/licenses/by/4.0"/> <meta name="DC.Source" content="Ornis Norvegica"/> <meta name="DC.Source.ISSN" content="1892-9737"/> <meta name="DC.Source.Volume" content="47"/> <meta name="DC.Source.URI" content="https://boap.uib.no/index.php/ornis"/> <meta name="DC.Subject" xml:lang="en" content="grazing "/> <meta name="DC.Subject" xml:lang="en" content="maximum counts "/> <meta name="DC.Subject" xml:lang="en" content="population change"/> <meta name="DC.Subject" xml:lang="en" content="territory mapping"/> <meta name="DC.Subject" xml:lang="en" content="red list"/> <meta name="DC.Title" content="Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway"/> <meta name="DC.Type" content="Text.Serial.Journal"/> <meta name="DC.Type.articleType" content="Articles"/> <link rel="alternate" type="application/atom+xml" href="https://boap.uib.no/index.php/ornis/gateway/plugin/WebFeedGatewayPlugin/atom"> <link rel="alternate" type="application/rdf+xml" href="https://boap.uib.no/index.php/ornis/gateway/plugin/WebFeedGatewayPlugin/rss"> <link rel="alternate" type="application/rss+xml" href="https://boap.uib.no/index.php/ornis/gateway/plugin/WebFeedGatewayPlugin/rss2"> <link rel="stylesheet" href="https://boap.uib.no/index.php/ornis/$$$call$$$/page/page/css?name=stylesheet" 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id="pkp_content_main"></a> <div class="page page_article"> <nav class="cmp_breadcrumbs" role="navigation" aria-label="You are here:"> <ol> <li> <a href="https://boap.uib.no/index.php/ornis/index"> Home </a> <span class="separator">/</span> </li> <li> <a href="https://boap.uib.no/index.php/ornis/issue/archive"> Archives </a> <span class="separator">/</span> </li> <li> <a href="https://boap.uib.no/index.php/ornis/issue/view/474"> Vol. 47 (2024) </a> <span class="separator">/</span> </li> <li class="current" aria-current="page"> <span aria-current="page"> Articles </span> </li> </ol> </nav> <article class="obj_article_details"> <h1 class="page_title"> Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway </h1> <div class="row"> <div class="main_entry"> <section class="item authors"> <h2 class="pkp_screen_reader">Authors</h2> <ul class="authors"> <li> <span class="name"> Thomas Sæther </span> <span class="affiliation"> 1) Nordre Øyeren Bird Observatory. 2) Department of Molecular Medicine, Institute of Basic Medical Sciences, Faculty of Medicine, University of Oslo </span> </li> <li> <span class="name"> Trude Starholm </span> <span class="affiliation"> 1) Nordre Øyeren Bird Observatory. 2) Museums in Akershus, Visitor Centre Wetland Nordre Øyeren </span> </li> <li> <span class="name"> Erling Hobøl </span> <span class="affiliation"> Nordre Øyeren Bird Observatory </span> </li> </ul> </section> <section class="item doi"> <h2 class="label"> DOI: </h2> <span class="value"> <a href="https://doi.org/10.15845/on.v47.3953"> https://doi.org/10.15845/on.v47.3953 </a> </span> </section> <section class="item keywords"> <h2 class="label"> Keywords: </h2> <span class="value"> grazing , maximum counts , population change, territory mapping, red list </span> </section> <section class="item abstract"> <h2 class="label">Abstract</h2> <p><strong>Cover photo:</strong> Singing Reed Bunting <em>Emberiza schoeniclus</em> at Årnestangen, Nordre Øyeren nature reserve. Photo: Øyvind Hagen.</p> <p>The Reed Bunting <em>Emberiza schoeniclus</em> is considered the most common of the five species of Emberiza buntings breeding in Norway and is currently listed as a species of Least Concern. However, a complete census of territorial male Reed Buntings conducted in the Nordre Øyeren nature reserve in 2019 showed a decline in the local breeding population of 67% compared to the last counts completed 40 years ago. Censuses were conducted in 1976 and 1981 in the same area and with the same methods. Analyses of citizen science data from the Norwegian Biodiversity Information Centre also show a similar decreasing trend (-66%) for the Reed Bunting breeding population in Nordre Øyeren from 1976 to 2019. Moreover, image analyses of the census maps show that that the number and density of Reed Bunting territories have decreased locally and probably has done so since early 1980s. Interestingly, a subset of localities within the survey area still have the same territory densities as the 1976 and 1981 censuses. We suggest that changes in habitat, vegetation and farming practice, especially grazing, could be the underlying cause of variation in bird numbers. Our results indicate a negative population trend for the Reed Bunting locally, a tendency that is also observed regionally in the Nordic countries. Taken together, local and regional declines raise concerns about the conservation status of the Reed Bunting in Norway.</p> </section> <section class="item references"> <h2 class="label"> References </h2> <div class="value"> <p>Akershus fylkeskommune. 2002. Miljøfaglige undersøkelser i Øyeren 1994–2000. Hovedrapport. Akershus fylkeskommune. Oslo. (In Norwegian). </p> <p>Artsdatabanken. 2021. Norsk rødliste for arter 2021. Artsdatabanken, Trondheim. (In Norwegian). </p> <p>Blindheim T & Olsen KM. 2008. Naturverdier og skjøtsel i Nordre Øyeren- og Sørumsneset naturreservater, Akershus. Biofokus-rapport 2008-32. Stiftelsen Biofokus. Oslo. (In Norwegian). </p> <p>Bogen J, Bønsnes TE & Elster M. 2002. Miljøfaglige undersøkelser i Øyeren 1994-2000. Erosjon, sedimentasjon og deltautvikling. Norges vassdrags- og energidirektorat (NVE), Oslo (In Norwegian). </p> <p>Brambilla M, Gustin M, Cento M, Ilahiane L & Celada C. 2020. Habitat, climate, topography and management differently affect occurrence in declining avian species: Implications for conservation in changing environments. Science of the Total Environment 742: 140663. </p> <p>Cramp S & Perrins CM. 1994. The Birds of the Western Palearctic, Vol. IX. Oxford University Press, Oxford. </p> <p>Fremstad E & Moen A. 2001. Threatened vegetation types in Norway. NTNU Vitenskapsmuseet Rapp. bot. Ser. 2001-4. (In Norwegian) </p> <p>Green M, Haas F & Lindström Å. 2020. Övervakning av fåglarnas populationsutveckling. Årsrapport för 2019. 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Negative population trend of the Reed Bunting Emberiza schoeniclus in an important wetland in southeastern Norway | Ornis Norvegica