Taavi Virro

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We studied whether and how channelization affects macroinvertebrate communities and biological quality in lowland streams of Estonia (Northern Europe). Two datasets of semi-quantitative samples (collected during 2001–2010) were used: (1) pairwise data (natural sites located upstream of the channelized sites; 22 streams, 24 pairs), and (2) background data(More)
Data on the variability in structure and functioning of interstitial rotifer assemblages are rare; however, this knowledge is essential for understanding their role in the interstitial food web. In the present study, we characterized psammic rotifer communities in terms of dominance structure, trophic traits, taxonomic and functional diversity at a seasonal(More)
As compared to macroscopic invertebrates zoopsammon communities, i.e. fauna inhabiting interstitial spaces between sand grains are largely understudied and the factors affecting their spatiotemporal variability are not well known. In a field observation, we tested how seasonal variability in the taxonomic composition and density of zoopsammon communities at(More)
The structure of peripheral nervous system diseases is reviewed by analyzing 941 in- and outpatient case histories. Of this number, 57.34% of the patients had radicular syndromes, 16.17%, acute injuries of nerves and plexuses, and 22.66%, tunnel and other compression syndromes. Cases of polyneuropathy and other disorders accounted for only 3.83%. A total of(More)
Among 12,476 patients with diseases of the peripheral nervous system 54.3% had radical syndromes, 16.3% had acute injuries of the nerves, 25.2% had entrapment syndromes, 3.8% suffered from polyneuropathies and other diseases. Entrapment syndromes were encountered in 3143 patients. Carpal, ulnar, and tarsal canal syndromes, thoracic outlet syndrome, and(More)
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