Long-Term Ringing Data on Migrating Passerines Reveal Overall Avian Decline in Europe

Petras, Tina; Vrezec, Al

doi:10.3390/d14110905

Cited by 3 publications

(2 citation statements)

References 88 publications

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“…In conclusion, among the factors affecting the area, reed management certainly does not influence the local decline of the species, and weather factors can only affect it through drought. As similar fluctuations in the population of this species have been observed in a wetland in southern Spain, changes in migration routes and wintering sites may be the underlying causes, as is the case for so many long-and short-distance migratory bird species (Alambiaga et al 2021, Petras & Vrezec 2022.…”

Section: Discussionmentioning

confidence: 55%

Long-term population changes of the Moustached Warbler (Acrocephalus melanopogon) in a Central Hungarian wetland habitat

Bozó,

Németh,

Csörgő

2023

Ornis Hungarica

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In recent years, the breeding populations of many migratory songbird species have declined in the Carpathian Basin. However, there may be significant differences between different geographical regions, as most species have a much higher chance of successful breeding in protected areas. This is also the case for the Moustached Warbler, one of the most habitat-specialist passerine. It colonises only perennial, unharvested reedbeds, therefore its conservation management is essential. We studied the population changes of this species between 2001 and 2022 at Lake Kolon in Izsák, based on bird ringing data from 10–24 July. Data of 12,817 ringed and 5,075 recaptured birds were used in the analyses. The annual capture rate decreased significantly during the study period. The proportion of juveniles was higher at higher water levels during the whole breeding season. In contrast, when looking at winter and first and second broods separately, water level had no effect on the juvenile/adult ratio. This is because the birds compensate for unsuccessful first broods by increasing the proportion of second and replacement broods. If the first broods are successful, the ratio of second and replacement broods will be lower. As reed management is practically non-existent in this area, the perennial reedbeds provide suitable nesting conditions for the species. Changes in the wintering sites may be responsible for the declining trend. Protection of the area is of particular importance for the conservation of the species.

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Section: Discussionmentioning

confidence: 55%

Long-term population changes of the Moustached Warbler (Acrocephalus melanopogon) in a Central Hungarian wetland habitat

Bozó,

Németh,

Csörgő

2023

Ornis Hungarica

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“…Declining population sizes are an increasing concern among scientists and conservationists (Both et al., 2006; Bowler et al., 2019; Petras & Vrezec, 2022; Sanderson et al., 2006). For migrants, conservation must target breeding and wintering habitats, as well as critical sites along the migration route (Runge et al., 2015).…”

Section: Introductionmentioning

confidence: 99%

High‐intensity bird migration along Alpine valleys calls for protective measures against anthropogenically induced avian mortality

Hirschhofer,

Liechti,

Ranacher

et al. 2024

Remote Sens Ecol Conserv

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The Alps are a natural barrier for avian broad‐front migration in Central Europe. While most birds that approach the Alps are deflected and circumvent the mountains, some choose to make the crossing. Here, they are funnelled and channelled in valleys, leading to high bird densities. Many Alpine valleys are suitable locations for wind farms, potentially creating a conflict between wind energy production and bird conservation. Collisions can be reduced by temporarily shutting down wind turbines. This however requires timely coordination, either by locally monitoring migration intensity or by extrapolating and forecasting migratory fluxes from other sites. However, little is known about the timing and intensity of bird migration in valleys of the central Alps, especially during spring migration. This study presents a 2‐year quantification of avian migration across the Alps. We collected terrestrial radar data at three sites: two located in Alpine valleys and one in the lowland, close to the northern foothills of the Alps. We found high migration traffic rates (MTR) during both migration seasons in the Alpine valleys, with outstanding numbers of migrants during the spring season. The strong alignment of the flight directions with the main orientation of alpine valleys highlights the importance of valleys and the connected passes in channelling migratory fluxes through the Alps. However, extrapolating migration intensities and forecasting peak migration events for inner Alpine sites is difficult, likely due to how migratory patterns and activity are influenced by the complexity of the local topography and the associated dynamic wind and weather conditions. Instead, we call for year‐round on‐site monitoring of migration intensities and strategies tailored to the local context to reduce the risk of bird strikes at wind turbines in the Alps.

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Centroid-AME: An open-source software for estimating avian migration trajectories using population centroids movement in the annual cycle

Feng,

Hughes,

Yang

et al. 2024

Ecological Informatics

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Long-Term Ringing Data on Migrating Passerines Reveal Overall Avian Decline in Europe

Cited by 3 publications

References 88 publications

Long-term population changes of the Moustached Warbler (Acrocephalus melanopogon) in a Central Hungarian wetland habitat

Long-term population changes of the Moustached Warbler (Acrocephalus melanopogon) in a Central Hungarian wetland habitat

High‐intensity bird migration along Alpine valleys calls for protective measures against anthropogenically induced avian mortality

Centroid-AME: An open-source software for estimating avian migration trajectories using population centroids movement in the annual cycle

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