Faculty of Biology, University of Latvia
Hard copy: ISSN 1691–8088
On-line: ISSN 2255–9582
Acta Univ Latv (2006) 710: 93–101
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Environmental and

Acta Univ Latv (2006) 710: 93–101

Orginal Article

Species diversity, abundance and dynamics of small mammals in the Eastern Latvia

Alda Pupila*, Uģis Bergmanis
Administration of Teiči Nature Reserve, Aiviekstes 3, Ļaudona, Madona reg. LV-4862, Latvia
*Corresponding author, E-mail: alda.pupila@teici.gov.lv


The paper presents the results of small mammal monitoring carried out in Eastern Latvia in the period from 1991 to 2005. Rodents and shrews were snap-trapped in early summer and autumn using the method of trap-line census. During the investigation, 12 small mammal species were found. In open type habitats Microtus arvalis prevailed with Apodemus agrarius and Sorex araneus subdominating. In forest habitats Clethrionomys glareolus, Apodemus flavicollis and Sorex araneus were more common. The average abundance and species diversity was low in the studied grassland habitats (17.1 ± 2.2 individuals per 100 trap-days; Shannon index H = 1.084; Simpson index c = 0.471). In forest habitats the average small mammal abundance was 10.5 ± 1.4 ind. per 100 trap-days and species diversity H = 1.153; c = 0.407. No cyclicity of small mammal population dynamics and no temporal synchrony among coexisting species were found, although fluctuations of small mammal density were observed in the area in different years. Nevertheless, small mammal populations exhibited spatial synchrony among the fluctuations of density in the sample areas in distances of 10 to 25 km.

Key words: abundance, dynamics, Latvia, small mammals, species diversity.

Acta Univ Latv (2006) 710: 93–101
 DOI: http://doi.org/10.22364/eeb

Prof. Gederts Ievinsh
Published by
University of Latvia

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