Heinrichs-Leonhards Skuja

Heinrichs Leonhards Skuja (; 8 September 1892 – 19 July 1972) was a Latvian phycologist active in the 20th century. He is considered an outstanding phycologist and protistologist of his time.

Skuja was actively involved in the study of Latvian algae beginning in 1924. After escaping to Sweden in 1944 near the end of World War II, he continued researching algal systematics and ecology in Uppsala. He received several academic awards from both countries for his contributions to phycology. Due to his extensive knowledge of algae, he received samples from scientific expeditions around the world to be identified by him. He described thousands of new taxa and published over 70 papers and monographs that were accompanied by his own scientific illustrations. In his private life, he invested time in art and music, and was well-regarded by his friends and colleagues.

Biography Early years

Heinrichs Leonhards Skuja was born on 8 September 1892 in Majori, Jūrmala, near Riga in Latvia, into a family of carpenters. then from 1923 as an enrolled student. Back in Latvia, Skuja's student Antonija Kumsāre continued algal research in the post-war period, and was later joined by Maija Balode, Ivars Druvietis and others.

Contributions Skuja published extensive works on algae around the world, accompanied by his own illustrations. An overview of his contributions follows, which primarily involved eukaryotic algae, but he also had an interest in general botany, mycology and lichenology, and specific biotopes such as caves. Some examples are Kylinella latvica, dedicated to the Swedish phycologist Harald Kylin; Ilsteria quadrijuncta, in honor of the first Latvian botanist Jānis Ilsters; and Chlamydomonas rigensis, dedicated to Riga. He published several monographs on the phytoplankton taxonomy and biology of Swedish lakes, including three major volumes: one in 1948, based on material from ten lakes of different trophic status around Uppsala; one in 1956, with observations on samples from more than 85 lakes of central Sweden; and one in 1964, his last major work, on the algae and vegetation of the lakes of the Abisko region in northern Sweden. These volumes described a total of 29 new genera and around 450 new species and varieties, illustrated by 171 plates. In the early years, he devoted much effort particularly to the genus Batrachospermum, but all the material collected on this genus was lost during the war.

Identification of material from worldwide expeditions Due to his expertise in algal taxonomy, Skuja received material obtained in expeditions around the world, with requests to identify it. Chlamydomonas skujae, Spirogyra skujae, Batrachospermum skujae, Diceras skujae, and Cosmarium skujae. , a taxonomist at the Leningrad Botanical Institute of the USSR Academy of Sciences, held him in high regard, and expressed doubts as to whether Skuja would have had the same academic opportunities in the Soviet Union as he did in Sweden.

The museum of the University of Latvia houses an algae herbarium collection with samples and illustrations created by Skuja.