In Hungary Navicula jakovljevicii was fi rstly recorded in biofi lm of Elodea nuttallii in 2005 in an oxbow of the catchment area of the River Danube. Subsequently, in 2006, N. jakovljevicii was also found in the same oxbow on reed stems as well. In the following years it appeared in another oxbow, suggesting an expanding distribution in the tributaries of the Danube in Hungary. The Hungarian p...

As an ecotone, the region between Amazon Rainforest and Tropical Savanna (Cerrado) biomes is, by definition, more susceptible to climate change. Therefore, understanding palaeoenvironmental dynamics is essential address future responses of such transition areas climatic fluctuations. In this context, we present a new sediment record for Late-Holocene retrieved from Barro-Preto, currently oxbow ...