Floating spinach in the river. The green, soggy spinach visible in the video is of course not spinach but algae/seaweed that floats in the Brynica River. The material was shot in Czeladź. The visible moving algae resemble thawed spinach, and I must admit that it even looks impressive. Brynica is a dirty river, but various very interesting plants grow along such rivers, either next to it or in it. Okay, now a little bit of knowledge in a nutshell from Uncle Google about spinach and everything else ;),
Spinach (Spinacia L.) - a genus of plants from the amaranth family (formerly in the goosefoot family), including three species, originating from west-central Asia. Among them, spinach (Spinacia oleracea L.), a typical species of the genus, is widely known, valued as a vegetable plant and cultivated almost all over the world.
Algae (Latin: Algae, Greek: Phykos) - a morphological and ecological group, traditionally consisting of several unrelated evolutionary lines of thallus, i.e. tissueless, organisms.
The science of algae is algology (phycology).
The features that unite the classes that make up this group are, in most cases, autotrophism and the function of the primary producer of organic matter in water reservoirs, or in places where water occurs in small amounts (moist soil, tree bark) or periodically, and the original, tissueless body structure.
Due to the fundamental division between prokaryotes and eukaryotes, only eukaryotic organisms are considered to be proper algae. Then the entire group is described as algae and cyanobacteria.
Estimates of the number of algal species range from 30,000 to over 1,000,000 (though estimates of 350,000,000 also appear). By mid-2012, AlgaeBase recorded approximately 32,500 species whose names were considered verified and approximately 100,000 names that are either taxonomic synonyms of verified species or whose status is uncertain. According to the creator of this database, the number of algae species is approximately 72,500, of which approximately 44,000 were described until 2012.
According to estimates, the most numerous contemporary photoautotrophic organism on Earth is the cyanobacteria Prochlorococcus marinus, whose population numbers 1,027 individuals. Populations of coccolithophores may be similarly numerous.
Fossils of cyanobacteria (stromatolites) date back as far as 3.7 billion years. They were found in the Isua Formation in Greenland. Not much younger (220 million years old) was found in the Pilbara craton. One of the oldest fossils of eukaryotic algae is known as Grypania spiralis. Some of them may be over 2 billion years old, although there is controversy as to their actual origin, while uncontroversial ones date back 1.6 billion years from the Indian Rohtas Formation (Vindhya). There are speculations that the fossils discovered in lake sediments in southern Africa by Józef Kaźmierczak's team may have an algal origin, as they present a cellular siphonal structure. They are dated to approximately 2.8-2.7 billion years ago, which would make them the oldest known eukaryote remains.
At the beginning of the 20th century, the term "algae" was borrowed from the highland dialect by the Polish botanist Józef Rostafiński and introduced into botanical systematics.
Brynica, Bryńska - a river, a right tributary of the Czarna Przemsza, 54.9 km long and with a basin area of ​​483 km².
The river flows in the Silesian Voivodeship. Its sources are located in the village of Mysłów, on the Woźnicki Prog, at an altitude of 350 m above sea level. It ends when it flows into Czarna Przemsza near Mysłowice, near the border with Sosnowiec.
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