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Nutritional ecology of Microtus arvalis (Pallas, 1779) in sown wild flower fields and quasi-natural habitats
 

Summary: Nutritional ecology of Microtus arvalis (Pallas, 1779) in sown wild
flower fields and quasi-natural habitats
Marc LÜTHI, Wolfgang NENTWIG, Jean-Pierre AIROLDI
Institute of Ecology and Evolution, Division of Community Ecology
University of Bern, Baltzerstrasse 6, CH-3012 Bern, Switzerland.
E-mail: maerel@yahoo.com, wolfgang.nentwig@iee.unibe.ch, airoldi@iee.unibe.ch
Nutritional ecology of Microtus arvalis (Pallas, 1779) in sown wild
flower fields and quasi-natural habitats. - Recently, sown wild flower
fields (SWFF) were established as ecological compensation areas to en-
hance and preserve animal and plant biodiversity. Besides their positive
effects, SWFF can also shelter potential pest species, like Microtus arvalis,
which stay preferentially in those fields. To analyse the nutritional ecology
of M. arvalis in SWFF and in quasi-natural habitats, 100 voles were trapped
in each habitat type near Bern, from October 2006 to July 2007. Stomach
content and faecal pellets were examined microscopically. Ingested plant
fragments were identified using reference slides. The ingested quantity of
each plant was assessed according to the covered surface on a microscopic
slide. Rank preference indices of Johnson were calculated by comparing
food-composition with food-offer in the vegetation. The food spectrum was
rather wide, including numerous grasses and herbs. Monocots constituted

  

Source: Airoldi, Jean-Pierre - Zoologischen Institut, Universität Bern

 

Collections: Environmental Sciences and Ecology