Linking Foraging Behaviour and Habitat Preferences During Moult Across Multiple Populations of Red‐Throated Diver DOI Creative Commons
James Duckworth, Susan O’Brien, Ruth E. Dunn

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

ABSTRACT Understanding the habitat use of individuals can facilitate methods to measure degree which populations will be affected by potential stressors. Such insights hard garner for marine species that are inaccessible during phases their annual cycles. Here, we quantify link between foraging and behaviour in an aquatic bird high conservation concern, red‐throated diver ( Gavia stellata ) across three breeding (Finland, Iceland Scotland) understudied moult period. Specifically, relationship feather isotope values (δ 13 C δ 15 N) diving behaviour, within populations, examining intra‐depth zone (IDZ) dives as a proxy benthic foraging. We found strong positive both higher N and, lesser extent, proportion IDZ dives. This was consistent all but baseline varied them, indicative populations' different moulting areas. Our results demonstrate divers continue generalist foragers after seasons, behavioural flexibility varies populations. Furthermore, due existence these relationships, reveal stable analysis standalone tool monitoring changes this ecologically significant species. The approach may also apply other known multiple strategies (e.g., benthically pelagically), with implications future efforts.

Language: Английский

Linking Foraging Behaviour and Habitat Preferences During Moult Across Multiple Populations of Red‐Throated Diver DOI Creative Commons
James Duckworth, Susan O’Brien, Ruth E. Dunn

et al.

Ecology and Evolution, Journal Year: 2024, Volume and Issue: 14(12)

Published: Dec. 1, 2024

ABSTRACT Understanding the habitat use of individuals can facilitate methods to measure degree which populations will be affected by potential stressors. Such insights hard garner for marine species that are inaccessible during phases their annual cycles. Here, we quantify link between foraging and behaviour in an aquatic bird high conservation concern, red‐throated diver ( Gavia stellata ) across three breeding (Finland, Iceland Scotland) understudied moult period. Specifically, relationship feather isotope values (δ 13 C δ 15 N) diving behaviour, within populations, examining intra‐depth zone (IDZ) dives as a proxy benthic foraging. We found strong positive both higher N and, lesser extent, proportion IDZ dives. This was consistent all but baseline varied them, indicative populations' different moulting areas. Our results demonstrate divers continue generalist foragers after seasons, behavioural flexibility varies populations. Furthermore, due existence these relationships, reveal stable analysis standalone tool monitoring changes this ecologically significant species. The approach may also apply other known multiple strategies (e.g., benthically pelagically), with implications future efforts.

Language: Английский

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