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2017 ; 14
(ä): 23
Nephropedia Template TP
gab.com Text
Twit Text FOAVip
Twit Text #
English Wikipedia
Edible dormice (Glis glis) avoid areas with a high density of their preferred
food plant - the European beech
#MMPMID28428805
Cornils JS
; Hoelzl F
; Rotter B
; Bieber C
; Ruf T
Front Zool
2017[]; 14
(ä): 23
PMID28428805
show ga
BACKGROUND: Numerous species, especially among rodents, are strongly affected by
the availability of pulsed resources. The intermittent production of large seed
crops in northern hemisphere tree species (e.g., beech Fagus spec.,oak Quercus
spec., pine trees Pinus spec.) are prime examples of these resource pulses. Adult
edible dormice are highly dependent on high energy seeds to maximize their
reproductive output. For juvenile dormice the energy rich food is important to
grow and fatten in a very short time period prior to hibernation. While these
erratic, often large-scale synchronized mast events provide overabundant seed
availability, a total lack of seed production can be observed in so-called mast
failure years. We hypothesized that dormice either switch territories between
mast and non-mast years, to maximize energy availability or select habitats in
which alternative food sources are also available (e.g., fleshy fruits, cones).
To analyze the habitat preferences of edible dormice we performed environmental
niche factor analyses (ENFA) for 9 years of capture-recapture data. RESULTS: As
expected, the animals mainly used areas with high canopy closure and vertical
stratification, probably to avoid predation. Surprisingly, we found that dormice
avoided areas with high beech tree density, but in contrast preferred areas with
a relatively high proportion of coniferous trees. Conifer cones and leaves can be
an alternative food source for edible dormice and are less variable in
availability. CONCLUSION: Therefore, we conclude that edible dormice try to avoid
areas with large fluctuations in food availability to be able to survive years
without mast in their territory.