Special species: Braun’s stonewort (Chara braunii)

The northern Bothnian Bay is shared by Finland and Sweden, and in many ways the sea is the same. In other ways, differences occur in underwater nature between both sides of the border, although this border only is a human concept and does not affect marine life. One thing that has puzzled our colleagues on … Continue reading Special species: Braun’s stonewort (Chara braunii)

Special species: Nuttall’s waterweed – an invasive species

Waterweeds (Elodea spp.) are species of aquatic plants that originate in North America. Now, because of human interference, two different waterweed species are spreading globally, causing havoc as they outcompete local flora. Canadian waterweed, Elodea canadensis, is no new acquaintance here, as this species was first found in both Finland and Sweden in the 1870s. … Continue reading Special species: Nuttall’s waterweed – an invasive species

Special species: Vaucheria

Filamentous algae are those thin fussy-looking, sometimes slimy, algae may find growing on hard substrates where they cover rocks and stones.Some of them though grow on soft bottoms. Examples of these algae that specialize in growing on soft sediments are species of the genus Vaucheria. Vaucheria are yellow-green algae that grow long, tube formed and … Continue reading Special species: Vaucheria

Special Species: Indicators

Indicator species means a species which tells something important about its environment or the environmental conditions where it thrives. Bladder wrack Fucus vesiculosus deteriorates in turbid water and the plants move towards the surface to catch more light, blue mussels need at least 4-5 per mill salinity to survive, and Vaucheria sp filamentous algae grow … Continue reading Special Species: Indicators

Special species: The Baltic water-plantain, Alisma wahlenbergii

It may be the most iconic plant species for the northern Bothnian Bay, but only few people have ever seen it. The Baltic water-plantain only exists in areas within the Baltic sea, it is listed as vulnerable (VU) on the international IUCN red list of threatened species and is listed as a priority species on … Continue reading Special species: The Baltic water-plantain, Alisma wahlenbergii

Special species: Fourleaf mare’s tail (Hippuris tetraphylla)

Fourleaf mare’s tail is an interesting plant species. Although it’s distribution is circumpolar (around the world), at the same time it’s very spotty. You can find it here and there in small populations but for one reason or another, it’s missing from the areas between the populations. It prefers brackish water and very shallow depth … Continue reading Special species: Fourleaf mare’s tail (Hippuris tetraphylla)