section_path: Geography/Biodiversity
section_name: Biodiversity
paragraph_text: Biodiversity
  
  Russia, owing to its gigantic size, has diverse ecosystems, including polar deserts, tundra, forest tundra, taiga, mixed and broadleaf forest, forest steppe, steppe, semi-desert, and subtropics. About half of Russia's territory is forested, and it has the world's largest area of forest, which sequester some of the world's highest amounts of carbon dioxide.
  
  Russian biodiversity includes 12,500 species of vascular plants, 2,200 species of bryophytes, about 3,000 species of lichens, 7,000–9,000 species of algae, and 20,000–25,000 species of fungi. Russian fauna is composed of 320 species of mammals, over 732 species of birds, 75 species of reptiles, about 30 species of amphibians, 343 species of freshwater fish (high endemism), approximately 1,500 species of saltwater fishes, 9 species of cyclostomata, and approximately 100–150,000 invertebrates (high endemism). Approximately 1,100 rare and endangered plant and animal species are included in the Russian Red Data Book.
  
  Russia's entirely natural ecosystems are conserved in nearly 15,000 specially protected natural territories of various statuses, occupying more than 10% of the country's total area. They include 45 biosphere reserves, 64 national parks, and 101 nature reserves. Although in decline, the country still has many ecosystems which are still considered intact forest, mainly in the northern taiga areas, and the subarctic tundra of Siberia. Russia had a Forest Landscape Integrity Index mean score of 9.02 in 2019, ranking 10th out of 172 countries, and the first ranked major nation globally.