Home > Aleksandr Fyodorovich Middendorf

Middendorf was born in Saint Petersburg, where he received his early education. He then studied for a medical degree at the University of Tartu, graduating in 1837. He undertook further studies at Berlin, Erlangen, Vienna and Breslau. In 1839 he became Assistant Professor of Zoology at Kiev. Shortly afterwards he took part in Karl Ernst von BaerKarl Ernst von Baer. Karl Ernst von Baer ( February 17 1792 November 26 1876) was a German- Estonian biologist and the founding father of embryology. Born in Piibe, Estonia. Educated at the Cathedral School in Tallinn and the University of Tartu. He becam's expedition to the Kola PeninsulaKola Peninsula ( , Kol'skij poluostrov in Russian) a peninsula on the far north of Russia, part of the Murmansk Oblast. Borders upon the Barents Sea on the North, the White sea on the East and South. The west border of the Kola Peninsula stretches along t.

From 1843 to 1845 he travelled to the Taimyr Peninsula on behalf of the St Petersburg Academy of Sciences. He published his findings in Reise in den äussersten Norden und Osten Sibiriens (Travels in the extreme north and east of Siberia) (1848-75), which included an account of the effects of permafrostIn geology, permafrost is soil that stays in a frozen state for more than two years in a row. The extent of permafrost can vary as the climate changes, approximately 20% of the Earth's land mass is underlain by permafrost. Seasonal frost commonly overlays on the spread of animalSubkingdom Parazoa Porifera (sponges) Subkingdom " Agnotozoa" Placozoa Orthonectida Rhombozoa Subkingdom Metazoa "Radiata" Cnidaria Ctenophora (comb jellies) Bilateria Protostomia Acoelomorpha Platyhelminthes (flatworms) Nemertina (ribbon worms) Gastrotris and plantGreen algae land plants (embryophytes non-vascular embryophytes Hepatophyta liverworts Anthocerophyta hornworts Bryophyta mosses vascular plants (tracheophytes seedless vascular plants Lycopodiophyta clubmosses Equisetophyta horsetails Pteridophyta "true"s. He also wrote Die Isepiptesen Russlands (1855), an account of bird migrationLong-distance land bird migration Many species of land birds migrate very long distances, the most common pattern being for birds to breed in the temperate or arctic northern hemisphere and winter in warmer regions, often in the tropics or the southern he in Russia.

He died at Hellenurme, Russian Empire (now in Valga County, Estonia).