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  • Biodiversity in rainforests
    The exact number of species inhabiting the world's tropical rainforests remains unknown, with estimates ranging from 3 to 50 million However, rainforests are unquestionably the most biologically diverse ecosystems on Earth, harboring far more species per unit area than sub-tropical, temperate, or boreal ecosystems
  • 9. 2: Species Diversity - Biology LibreTexts
    Despite considerable effort, knowledge of the species that inhabit the planet is limited About 1 5 million species have been described, but many more species are yet to be identified Estimates of the total number of species on Earth range from 3 million to 100 million, with more recent estimates commonly ranging from 8 to 11 million species
  • Chapter 10 Questions Flashcards - Quizlet
    Study with Quizlet and memorize flashcards containing terms like 1 Describe the general diversity of species on Earth in terms of relative numbers and types of organisms compare known numbers to estimates, 2 three levels of biodiversity? which level is most commonly meant by biodiversity?, 3 How is biodiversity important to ecosystems? and more
  • Biodiversity and Development - Conserving Biodiversity - NCBI . . .
    Current estimates of the Earth's total species diversity range from 10 million to 100 million (Wilson, 1988; Ehrlich and Wilson, 1991; Erwin, 1991) Thus, as Wilson (1988) has pointed out, we do not know even to within the nearest order of magnitude the number of species on the planet
  • Biodiversity — Earth’s million-piece puzzle - Rainforest . . .
    The forests of the world are “biodiversity hotspots,” places where we can find an extraordinarily high number of unique species — including species that are currently threatened with extinction in the wild But biodiversity is so much more than just the sum total of individual species, which is why we have to protect places like the last tropical rainforests, stretching from Indonesia to
  • Biodiversity and Tropical Rainforests - Internet Geography
    For example, rainforests contain 170,000 of the world’s 250,000 known plant species The Indonesian rainforest has over 30,000 species of plants and 1,600 species of birds Why is biodiversity so high in the tropical rainforest? There are several reasons for biodiversity in the tropical rainforest, including:
  • Tropical forests are home to over half of the world’s . . .
    With respect to endemism, at least 17% and up to 29% (100% and 80–100% range overlap, respectively) of global terrestrial vertebrates are endemic to tropical forests (associated with only tropical forest habitats), with endemism levels in amphibians being notably high (33–44% of global species; Figure 2, a and b) In comparison, we found
  • Tropical Rainforests - Harbors of Diversity - Treehugger
    Tropical Rainforests and Biodiversity Some existing rainforests have evolved over 65 million years The most common estimate of the size of total rainforests amount to approximately 6% of
  • Chapter 12. 3 Notes Definitions Flashcards - Quizlet
    Overall, as many as 2000 new marine and terrestrial species are discovered each year Therefore, the total number of species on Earth, known and still undiscovered, has been estimated to be between 3 million and 100 million Although estimates range widely, the most likely total number of species on Earth is probably between 6 million and 12
  • RAINFOREST DIVERSITY - ORIGINS AND IMPLICATIONS - Mongabay. com
    No one knows exactly how many species live in the world's tropical rainforests — estimates range from 3 to 50 million species — rainforests are the undisputed champions of biodiversity among the world's ecosystems, containing far higher numbers of species on a per-area basis relative to sub-tropical, temperate, and boreal ecosystems
  • 16. 1: Introduction to Biodiversity - Biology LibreTexts
    Despite considerable effort, knowledge of the species that inhabit the planet is limited About 1 5 million species have been described, but many more species are yet to be identified Estimates of the total number of species on Earth range from 3 million to 100 million, with more recent estimates commonly ranging from 8 to 11 million species
  • Global biodiversity - Wikipedia
    Insects make up the vast majority of animal species [14]Chapman, 2005 and 2009 [9] has attempted to compile perhaps the most comprehensive recent statistics on numbers of extant species, drawing on a range of published and unpublished sources, and has come up with a figure of approximately 1 9 million estimated described taxa, as against possibly a total of between 11 and 12 million
  • Biodiversity – Rainforest Ecology
    Estimates on the number of Earth’s current species range from 10 million to 14 million, of which about 1 2 million have been documented and over 86 percent have not yet been described The total amount of related DNA base pairs on Earth is estimated at 5 0 x 10 37 and weighs 50 billion tonnes
  • State of the World’s Forests 2020 - Food and Agriculture . . .
    Estimates of the total number of species on Earth range from 3 million to 100 million (May, 2010) Although it is widely reported that forests harbour 80 percent of terrestrial plants and animals, such a precise estimate is unlikely to be accurate given the changing state of knowledge of planetary biodiversity
  • Questions and answers about biodiversity - Rainforest Rescue
    The diversity of species is lowest at the poles and increases toward the equator, with the deserts being obvious exceptions Tropical rainforests and coral reefs are among the planet’s richest and most complex ecosystems The areas with the greatest diversity of plant life are the tropical Andes and southeastern Asia





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