Jouni Lehtoranta

TL;DR: Despite a decrease of about 30% in the external nutrient inputs, no corresponding improvement has been observed in the state of the open Gulf of Finland as discussed by the authors, despite the decrease in loading, an increase in the phosphate-P concentration was observed both in the surface and near-bottom layers around the mid-1990s.

TL;DR: It is proposed that the two alternative microbial mineralization pathways in sediments exert decisively different impacts on aquatic ecosystems.

TL;DR: In this paper, the authors synthesize the ongoing shift from diatom dominance towards more dinoflagellates in parts of the Baltic Sea during the spring bloom and its potential effects on biogeochemical cycling of key elements (eg C, N and P).

TL;DR: In this paper, the authors analyzed temporal trends of iron (Fe) concentrations across 340 water bodies distributed over 10 countries in northern Europe and North America in order to gain a clearer understanding of where, to what extent, and why Fe concentrations are on the rise.

TL;DR: It is proposed that in SO₄-rich systems, Fe oxides transported by eroded soil may promote Fe cycling, inhibit microbial SO⁄ reduction and maintain the ability of sediment to retain P.