Density and climate effects on age‐specific survival and population growth: consequences for hibernating mammals

Combe, F.J., Juškaitis, R., Trout, R.C., Bird, S., Ellis, J.S., Norrey, J., Al‐Fulaij, N., White, I. and Harris, W.E. (2022) Density and climate effects on age‐specific survival and population growth: consequences for hibernating mammals. Animal Conservation, 26 (3). pp. 317-330. ISSN 1367-9430

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The impact of factors such as density dependence, food availability and weather are known to be important for predicting population change in a wide range of species. However, a challenge in ecology is understanding the contributory and interactive role of these drivers on populations. This is necessary to design effective conservation and management strategies. Using data from long-term studies of five hazel dormouse Muscardinus avellanarius populations in Europe, we tested the relationship between population density and weather and their impact on demographic rates. We used an integrated population modelling approach, estimating age-specific overwinter survival, annual population growth and fecundity rates. We found strong negative effects of population density, precipitation and winter temperature on population growth rates. This suggests that warmer and wetter weather negatively affects dormouse survival for both adults and juveniles, but we found subtle differences in these effects between age classes. We also identified an interaction between weather measures and population density on age-specific survival, possibly as a result of weather impacts during hibernation. Although we found low winter temperature was positively associated with population growth, we found evidence consistent with density dependence. We discuss our results in the context of woodland habitat conservation management.

Item Type: Article
Keywords: IPM, demography, climate change, survival, population dynamics, population density, hazel dormouse, woodland habitats
Divisions: Agriculture and Environment (from 1.08.20)
Depositing User: Miss Terésa-Marie Jones
Date Deposited: 31 Jul 2023 15:44
Last Modified: 22 Dec 2023 04:30

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