Alpine large herbivores have developed physiological and behavioural mechanisms to cope with fluctuations in climate and resource availability that may become maladaptive under climate warming. We tested this hypothesis in female Alpine ibex (Capra ibex) by modelling annual and daily movement and activity patterns in relation to temperature, vegetation productivity and reproductive status based on bio-logging data and climate change projections. In summer, ibex moved upslope, tracking the green wave. Ibex decreased diel activity sharply above a threshold temperature of 13–14°C, indicating thermal stress, but compensated behaviourally by foraging both earlier and later in the day, and by moving further upslope than on cooler days, especially reproductive females. This critical temperature will be exceeded three times as often under climate change projections. Under such scenarios, the altitudinal extent of the area will limit the available habitat providing thermal shelter, potentially impacting performance and population distribution of this emblematic mountain ungulate

Semenzato, P.; Cagnacci, F.; Ossi, F.; Eccel, E.; Morellet, N.; Hewison, A.J.M.; Sturaro, E.; Ramanzin, M. (2021). Behavioural heat-stress compensation in a cold-adapted ungulate: forage-mediated responses to warming Alpine summers. ECOLOGY LETTERS, 24 (8): 1556-1568. doi: 10.1111/ele.13750 handle: http://hdl.handle.net/10449/68564

Behavioural heat-stress compensation in a cold-adapted ungulate: forage-mediated responses to warming Alpine summers

Cagnacci, Francesca;Ossi, Federico;Eccel, Emanuele;
2021-01-01

Abstract

Alpine large herbivores have developed physiological and behavioural mechanisms to cope with fluctuations in climate and resource availability that may become maladaptive under climate warming. We tested this hypothesis in female Alpine ibex (Capra ibex) by modelling annual and daily movement and activity patterns in relation to temperature, vegetation productivity and reproductive status based on bio-logging data and climate change projections. In summer, ibex moved upslope, tracking the green wave. Ibex decreased diel activity sharply above a threshold temperature of 13–14°C, indicating thermal stress, but compensated behaviourally by foraging both earlier and later in the day, and by moving further upslope than on cooler days, especially reproductive females. This critical temperature will be exceeded three times as often under climate change projections. Under such scenarios, the altitudinal extent of the area will limit the available habitat providing thermal shelter, potentially impacting performance and population distribution of this emblematic mountain ungulate
Accelerometers
Activity budget
Altitudinal migration
Alpine ibex
Behavioural responses
Capra ibex
Climate change
Foraging
GPS telemetry
Thermoregulation
Settore BIO/07 - ECOLOGIA
2021
Semenzato, P.; Cagnacci, F.; Ossi, F.; Eccel, E.; Morellet, N.; Hewison, A.J.M.; Sturaro, E.; Ramanzin, M. (2021). Behavioural heat-stress compensation in a cold-adapted ungulate: forage-mediated responses to warming Alpine summers. ECOLOGY LETTERS, 24 (8): 1556-1568. doi: 10.1111/ele.13750 handle: http://hdl.handle.net/10449/68564
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/10449/68564
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