4 Result(s)

Article

Ecological consequences of biological invasions: three invertebrate case studies in the north-eastern Baltic Sea

Population dynamics and ecological impacts of the cirriped Balanus improvisus, the polychaete Marenzelleria neglecta and the cladoceran Cercopagis pengoi were investigated in the north-eastern Baltic Sea. After a...

Jonne Kotta, Ilmar Kotta, Mart Simm, Ain Lankov… in Helgoland Marine Research (2006)

Article

Distribution and population characteristics of the alien talitrid amphipod Orchestia cavimana in relation to environmental conditions in the Northeastern Baltic Sea

The talitrid amphipods were found for the first time in the Northeastern Baltic Sea in 1999. Orchestia cavimana inhabited damp wracks cast up on shore within a 200 m area of Saaremaa Island. In the following year...

Kristjan Herkül, Jonne Kotta, Ilmar Kotta in Helgoland Marine Research (2006)

Article

Seasonal changes in situ grazing of the mesoherbivores Idotea baltica and Gammarus oceanicus on the brown algae Fucus vesiculosus and Pylaiella littoralis in the central Gulf of Finland, Baltic Sea

Jonne Kotta, Helen Orav-Kotta, Tiina Paalme, Ilmar Kotta, Henn Kukk in Hydrobiologia (2006)

Article

Seasonal variability in the grazing potential of the invasive amphipod Gammarus tigrinus and the native amphipod Gammarus salinus (Amphipoda: Crustacea) in the northern Baltic Sea

Mesograzers are known to reduce the biomass of their host plant and modify the structure of the whole macrophyte community in many ecosystems. Thus, the introduction of an efficient mesograzer may destabilize ...

Helen Orav-Kotta, Jonne Kotta, Kristjan Herkül, Ilmar Kotta… in Biological Invasions (2009)