Cool winters versus mild winters: effects on spring plankton in Lake Peipsi; pp. 163–183

Release of available nitrogen from river-discharged dissolved organic matter by heterotrophic bacteria associated with the cyanobacterium Microcystis aeruginosa; pp. 184–196

Influence of environmental factors on the distribution of caddisfly (Trichoptera) communities in medium-sized lowland streams in Latvia; pp. 197–215

Notes on the external morphology, ecology, and origin of Megalomys desmarestii (Sigmodontinae, Cricetidae, Rodentia), the extinct giant rat of Martinique Island, Lesser Antilles; pp. 216–229

The first finding of the Ponto-Caspian mysid shrimp Hemimysis anomala G. O. Sars (Mysidae) in the Estonian coastal sea; pp. 230–236