Persistent species relationships characterize migrating bird communities across stopover sites and seasons

Proceedings of the National Academy of Sciences, Год журнала: 2024, Номер 121(34)

Опубликована: Авг. 13, 2024

Global migrations of diverse animal species often converge along the same routes, bringing together seasonal assemblages animals that may compete, prey on each other, and share information or pathogens. These interspecific interactions, when energetic demands are high time to complete journeys is short, influence survival, migratory success, stopover ecology, routes. Numerous accounts suggest co-migrations globally distributed in aerial, aquatic, terrestrial systems, although study migration date has rarely investigated interactions among migrating animals. Here, we test hypothesis communities engaged networks ecological interactions. We leverage over half a million records 50 bird from five banding sites collected 8 23 y for associations using social network analyses. find strong support persistent relationships across between spring fall migration. be ecologically meaningful: They stronger phylogenetically related with similar foraging behaviors nonbreeding ranges even after accounting nonsocial contributions associations, including overlap timing habitat use. While could result costly competition beneficial exchange, largely positive, suggesting limited competitive exclusion at scale station during stopovers. Our findings an understanding consist networked rather than random independently species, encouraging future studies nature consequences co-migrant

Язык: Английский

---

Ecological insights on the feeding behaviour of waterbirds in an Important Bird and Biodiversity Area of South West Johor Coast, Malaysia

Biodiversity Data Journal, Год журнала: 2025, Номер 13

Опубликована: Янв. 15, 2025

Mangroves and mudflats are essential intertidal habitats that support benthic communities, providing critical feeding grounds for waterbirds. However, the degradation of these due to coastal reclamation poses significant threats prey availability waterbird populations along South est Johor Coast. While most avian research in focuses on forest birds, studies waterbirds, particularly their ecology, remain scarce. Understanding ecology waterbirds is crucial strengthening conservation efforts vulnerable habitats. This study investigated behaviour diet composition West Coast, Malaysia. Fieldwork was conducted three from November 2020 May 2021, employing direct observation technique. A total 576 hours were recorded, averaging 2 19 minutes per focal observation. Of 17 species only 11 included analysis based sufficient data. The results revealed primarily consumed fish, molluscs, worms, crabs unidentified prey, with fish comprising 25% overall diet. Feeding varied significantly by morphology traits, larger demonstrating higher efficiency. Despite lower rates shorter durations, had a greater percentage successful attempts, indicating superior ability meet energy requirements. These findings provide baseline data understanding highlight importance conserving contributes development targeted strategies Important Bird Biodiversity Area (IBA) Malaysia, an area increasingly at risk habitat degradation.

Язык: Английский

---

Environmental, Developmental, and Genetic Conditions Shaping Monarch Butterfly Migration Behavior

bioRxiv (Cold Spring Harbor Laboratory), Год журнала: 2025, Номер unknown

Опубликована: Янв. 16, 2025

Monarch butterflies in North America migrate south each autumn, but the mechanisms that initiate their migratory flight remain incompletely understood. We investigated environmental, developmental, and genetic factors contribute to directional by testing summer autumn-generation monarchs three simulators: two at ground level (with without wind blockage) a novel balloon-based system raised 30 meters into air. Monarchs reared under autumn-like conditions growth chamber during were also tested explore influence of developmental cues. Autumn generation demonstrated significant southwestern orientation, observed exclusively balloon simulator, underscoring importance high-altitude for behavior. Summer displayed southward larger wing sizes, partial reproductive diapause, indicating specific seasonal environmental cues are sufficient induce traits. In contrast, lab line captivity since 2016 exhibited diminished size reduced orientation ability, even when outdoors consistent with loss traits absence migration. Surprisingly, simulator tended orient upwind, which suggests may serves as cue These findings highlight critical roles altitude, wind, monarch migration validate powerful tool studying This research advances our understanding initiation informs strategies conservation efforts amidst change.

Язык: Английский

---

Influence of local (air temperature) and wide-scale (North Atlantic Oscillation) climate indices on the first arrival dates of the Common Wood Pigeon (Columba palumbus) at breeding site in SE Poland

International Journal of Biometeorology, Год журнала: 2025, Номер unknown

Опубликована: Янв. 27, 2025

Язык: Английский

---

Climate‐related drivers of migratory bird health in the south‐central USA

Biological reviews/Biological reviews of the Cambridge Philosophical Society, Год журнала: 2025, Номер unknown

Опубликована: Фев. 6, 2025

ABSTRACT Migratory birds are species of concern that play important ecological roles while also supporting recreational opportunities for the hunting and birdwatching public. Direct indirect effects climate variability, extremes, change on migratory bird health manifest at individual, population, species, community levels. This review focuses spend part their life cycles in south‐central USA. Although gaps knowledge remain, prior studies provide a solid foundation to understand how affects inform management priorities actions.

Язык: Английский

---