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Övervakning av fåglarnas populationsutveckling: : Årsrapport för 2023

Green, Martin LU ; Haas, Fredrik LU orcid and Lindström, Åke LU orcid (2024)
Abstract
We present the results of the Swedish Bird Survey, a project run by the Department of Biology, Lund University, as a part of the National Monitoring Programme of the Swedish Environmental Protection Agency. The results for 2023 include data from: 517 winter point counts in 2022/2023 (48th winter), of which 243 were carried out during the Christmas/New Year count, 181 summer point count routes (49th year) and 460 Fixed routes (28th year). In the programme for covering night-active birds (14th season), 138 routes were covered on up to three occasions each (March, April and June). In addition, 432 waterbird routes (9th season) and 198 archipelago squares (9th season) were surveyed. In the waterbird counts included in the International... (More)
We present the results of the Swedish Bird Survey, a project run by the Department of Biology, Lund University, as a part of the National Monitoring Programme of the Swedish Environmental Protection Agency. The results for 2023 include data from: 517 winter point counts in 2022/2023 (48th winter), of which 243 were carried out during the Christmas/New Year count, 181 summer point count routes (49th year) and 460 Fixed routes (28th year). In the programme for covering night-active birds (14th season), 138 routes were covered on up to three occasions each (March, April and June). In addition, 432 waterbird routes (9th season) and 198 archipelago squares (9th season) were surveyed. In the waterbird counts included in the International Waterbird Census (IWC) 249 sectors were counted in September (49th year) and 944 sectors in January (58th year). In total 735 persons were involved in the surveys reported here.
Population trends were analyzed using TRIM and trends for 224 different bird species are presented, as well as the geographical distributions of the covered routes. Larger mammals are counted on the Night routes and the Fixed routes since 2010 and 2011, respectively, and we present trends for 13 mammal species based on these two systems. For the first time we present trends for five species of amphibians, as recorded on the night routes. We also present trends from the schemes of water- and archipelago birds, through which we can follow yet more species with systematic counts during the breeding period.
The long-term trends show both winners and losers among the Swedish birds. The species with the strongest declines during the breeding season are Eurasian Wigeon, Common Pochard, Common Eider, Common Shelduck, Bean Goose, Northern Lapwing, Eurasian Curlew, Spotted Redshank, Common Sandpiper, Greater Black-backed Gull, European Herring Gull, Long-eared Owl, Tengmalm’s Owl, Common Swift, Common House and Sand Martin, Golden Oriole, Willow Tit, Common Starling, Yellowhammer and Ortolan Bunting. The strongest increases are found in Great Cormorant, Shag, Great White Egret, Gadwall, Grey-lag Goose, Whooper Swan, Red Kite, White-tailed Eagle, Common Crane, Dunlin (ssp. alpina), Guillemot, Wren, Mistle Thrush, Eurasian Blackcap, southern Common Chiffchaff and European Goldfinch.
Based on 187 taxa recorded on the Fixed routes over the last 10 years, there are more species significantly increasing in numbers (23%), than decreasing in numbers (17%). For the remaining species (60%), no statistically significant changes were recorded during the last ten years. Eurasian Skylark, Common Linnet and Rustic Bunting has increased strongly in the last decade following long-term declines. After a long period of relative stability, Barn Swallow has decreased markedly in numbers in recent years.
Based on the winter point counts, also here there are more positive than negative trends for the last ten years. In total 20% of 114 species have increased significantly, while 18% have decreased. For waterbirds specifically and based on the IWC counts in January, the majority of the surveyed species (77%) have increased in winter during the last ten years and only 10% of the species have decreased significantly.
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Abstract (Swedish)
I denna rapport redovisas populationstrender för 224 svenska fågelarter för olika långa tidsperioder, samt korttidstrender för 13 arter av större däggdjur. Fåglarna har räknats höst, vinter, vår och sommar enligt strikt standardiserade metoder. Sommar- respektive vinterpunktrutter har räknats sedan 1975, i huvudsak i södra Sverige. Standardrutterna räknas också på sommaren (sedan 1996) men täcker hela Sverige på ett representativt sätt. Nattaktiva fåglar har räknats sedan 2010. Utöver detta räknas större däggdjur både på standardrutterna (sedan 2011) och på nattrutterna (2010). Sedan 2019 räknas även groddjur på nattrutterna och i år presenterar vi för första gången trender för dessa. Med start 2015 räknas fåglar i ytterligare två program... (More)
I denna rapport redovisas populationstrender för 224 svenska fågelarter för olika långa tidsperioder, samt korttidstrender för 13 arter av större däggdjur. Fåglarna har räknats höst, vinter, vår och sommar enligt strikt standardiserade metoder. Sommar- respektive vinterpunktrutter har räknats sedan 1975, i huvudsak i södra Sverige. Standardrutterna räknas också på sommaren (sedan 1996) men täcker hela Sverige på ett representativt sätt. Nattaktiva fåglar har räknats sedan 2010. Utöver detta räknas större däggdjur både på standardrutterna (sedan 2011) och på nattrutterna (2010). Sedan 2019 räknas även groddjur på nattrutterna och i år presenterar vi för första gången trender för dessa. Med start 2015 räknas fåglar i ytterligare två program under häckningstid; Sjöfågelrutterna (drivs tillsammans med BirdLife Sverige) som riktar in sig på fåglar knutna till blöta miljöer både i inlandet och längs kusten, samt Kustfågel¬övervakningen där sjöfåglar i skärgården räknas inom 200 fasta rutor om 2 x 2 km. Vi presenterar också resultaten från sjöfågelräkningarna i september (sedan 1973) och januari (sedan 1971).
Vintern 2022/2023 inventerades 517 vinterpunktrutter varav 243 gjordes under huvud¬perioden kring jul och nyår. Sommaren 2023 gjordes 181 sommarpunktrutter och 460 standardrutter. Totalt 138 nattrutter inventerades vid upp till tre tillfällen (mars, april och juni). Det inventerades 432 sjöfågelrutter och 198 kustrutor under försommaren. Sjöfåglar räknades i 944 sektorer i januari och 249 sektorer i september 2023. Totalt medverkade 735 inventerare i de olika delprogrammen från hösten 2022 till hösten 2023.
De av våra tidsserier som spänner över 25 år eller mer visar på allt från kraftiga minskningar till kraftiga ökningar. De arter som minskat tydligast under häckningstid är bläsand, brunand, ejder, gravand, sädgås, tofsvipa, storspov, svartsnäppa, drillsnäppa, havstrut, gråtrut, hornuggla, pärluggla, tornseglare, hus- och backsvala, sommargylling, talltita, stare, gulsparv och ortolansparv. Bland de som ökat mest i antal återfinns storskarv, toppskarv, ägretthäger, snatterand, grågås, sångsvan, röd glada, havsörn, trana, kärrsnäppa (i fjällen), sillgrissla, gärdsmyg, dubbeltrast, svarthätta, sydlig gransångare och steglits. De i Sverige över¬vintrande vattenfåglarna har i allmänhet ökat markant i antal, där allt mildare
vintrar är en starkt bidragande orsak.
Sett till de senaste 10 åren är det fler arter (23 %) som ökat än som minskat (17 %) i antal under häckningstid enligt standardrutterna (baserat på 187 arter och underarter). För resterande 60% av arterna finns inga säkra förändringar under denna korta tidsperiod. Markanta skiften i trend¬riktning de senaste tio åren återfinns bland enstaka arter, såsom sånglärka, hämpling och videsparv där en minskning vänts i en uppgång och ladusvala som börjat minska kraftigt.
Mönstret bland övervintrande fåglar under de senaste 10 åren är ungefär detsamma. Vintertid har 20 % av arterna som vi kan beräkna en trend för på vinterpunktrutterna ökat i antal, medan 18 % har minskat i antal under samma period. För övervintrande sjöfåglar är bilden ännu mer positiv. Baserat på januariinventeringarna av sjöfågel har majoriteten av de 30 analyserade arterna (77 %) ökat under de senaste 10 åren och en betydligt lägre andel har minskat i antal (10 %). De ökande antalen övervintrande vattenfåglar beror även under denna korta period till stor del på en räcka av milda vintrar. (Less)
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alternative title
Monitoring population changes of birds in Sweden. : Annual report for 2023
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80 pages
language
Swedish
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id
07f73f21-b165-450f-8236-6635c3b60804
date added to LUP
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@techreport{07f73f21-b165-450f-8236-6635c3b60804,
  abstract     = {{We present the results of the Swedish Bird Survey, a project run by the Department of Biology, Lund University, as a part of the National Monitoring Programme of the Swedish Environmental Protection Agency. The results for 2023 include data from: 517 winter point counts in 2022/2023 (48th winter), of which 243 were carried out during the Christmas/New Year count, 181 summer point count routes (49th year) and 460 Fixed routes (28th year). In the programme for covering night-active birds (14th season), 138 routes were covered on up to three occasions each (March, April and June). In addition, 432 waterbird routes (9th season) and 198 archipelago squares (9th season) were surveyed. In the waterbird counts included in the International Waterbird Census (IWC) 249 sectors were counted in September (49th year) and 944 sectors in January (58th year). In total 735 persons were involved in the surveys reported here.<br/>Population trends were analyzed using TRIM and trends for 224 different bird species are presented, as well as the geographical distributions of the covered routes. Larger mammals are counted on the Night routes and the Fixed routes since 2010 and 2011, respectively, and we present trends for 13 mammal species based on these two systems. For the first time we present trends for five species of amphibians, as recorded on the night routes. We also present trends from the schemes of water- and archipelago birds, through which we can follow yet more species with systematic counts during the breeding period. <br/>The long-term trends show both winners and losers among the Swedish birds. The species with the strongest declines during the breeding season are Eurasian Wigeon, Common Pochard, Common Eider, Common Shelduck, Bean Goose, Northern Lapwing, Eurasian Curlew, Spotted Redshank, Common Sandpiper, Greater Black-backed Gull, European Herring Gull, Long-eared Owl, Tengmalm’s Owl, Common Swift, Common House and Sand Martin, Golden Oriole, Willow Tit, Common Starling, Yellowhammer and Ortolan Bunting. The strongest increases are found in Great Cormorant, Shag, Great White Egret, Gadwall, Grey-lag Goose, Whooper Swan, Red Kite, White-tailed Eagle, Common Crane, Dunlin (ssp. alpina), Guillemot, Wren, Mistle Thrush, Eurasian Blackcap, southern Common Chiffchaff and European Goldfinch. <br/>Based on 187 taxa recorded on the Fixed routes over the last 10 years, there are more species significantly increasing in numbers (23%), than decreasing in numbers (17%). For the remaining species (60%), no statistically significant changes were recorded during the last ten years. Eurasian Skylark, Common Linnet and Rustic Bunting has increased strongly in the last decade following long-term declines. After a long period of relative stability, Barn Swallow has decreased markedly in numbers in recent years.<br/>Based on the winter point counts, also here there are more positive than negative trends for the last ten years. In total 20% of 114 species have increased significantly, while 18% have decreased. For waterbirds specifically and based on the IWC counts in January, the majority of the surveyed species (77%) have increased in winter during the last ten years and only 10% of the species have decreased significantly. <br/>}},
  author       = {{Green, Martin and Haas, Fredrik and Lindström, Åke}},
  language     = {{swe}},
  title        = {{Övervakning av fåglarnas populationsutveckling: : Årsrapport för 2023}},
  url          = {{https://lup.lub.lu.se/search/files/206433209/_rsrapport_2023_FINAL_Standard_Quality_utan_namn_f_r_utskick_till_inventerare_-_med_omslag.pdf}},
  year         = {{2024}},
}