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Forskningsartikel2024Vetenskapligt granskadÖppen tillgång

Migratory birds modulate niche tradeoffs in rhythm with seasons and life history

Yanco, Scott W.; Oliver, Ruth Y.; Iannarilli, Fabiola; Carlson, Ben S.; Heine, Georg; Mueller, Uschi; Richter, Nina; Vorneweg, Bernd; Andryushchenko, Yuriy; Batbayar, Nyambayar; Dagys, Mindaugas; Desholm, Mark; Galtbalt, Batbayar; Gavrilov, Andrey E.; Goroshko, Oleg A.; Ilyashenko, Elena I.; Ilyashenko, Valentin Yu; Mansson, Johan; Mudrik, Elena A.; Natsagdorj, Tseveenmyadag;
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Sammanfattning

Movement is a key means by which animals cope with variable environments. As they move, animals construct individual niches composed of the environmental conditions they experience. Niche axes may vary over time and covary with one another as animals make tradeoffs between competing needs. Seasonal migration is expected to produce substantial niche variation as animals move to keep pace with major life history phases and fluctuations in environmental conditions. Here, we apply a time-ordered principal component analysis to examine dynamic niche variance and covariance across the annual cycle for four species of migratory crane: common crane (Grus grus, n = 20), demoiselle crane (Anthropoides virgo, n = 66), black-necked crane (Grus nigricollis, n = 9), and white-naped crane (Grus vipio, n = 9). We consider four key niche components known to be important to aspects of crane natural history: enhanced vegetation index (resources availability), temperature (thermoregulation), crop proportion (preferred foraging habitat), and proximity to water (predator avoidance). All species showed a primary seasonal niche “rhythm” that dominated variance in niche components across the annual cycle. Secondary rhythms were linked to major species-specific life history phases (migration, breeding, and nonbreeding) as well as seasonal environmental patterns. Furthermore, we found that cranes’ experiences of the environment emerge from time-dynamic tradeoffs among niche components. We suggest that our approach to estimating the environmental niche as a multidimensional and time-dynamical system of tradeoffs improves mechanistic understanding of organism–environment interactions.

Nyckelord

migration; ecological niche; animal movement; life history

Publicerad i

Proceedings of the National Academy of Sciences of the United States of America
2024, volym: 121, nummer: 41, artikelnummer: e2316827121

SLU författare

Associerade SLU-program

Viltskadecenter
SLU Nätverk växtskydd

Globala målen (SDG)

SDG15 Ekosystem och biologisk mångfald

UKÄ forskningsämne

Ekologi
Zoologi

Publikationens identifierare

  • DOI: https://doi.org/10.1073/pnas.2316827121

Permanent länk till denna sida (URI)

https://res.slu.se/id/publ/133059