In this publication, he traced the history of names, gave keys to families and genera, described North American species and provided synopses of species in other parts of the world.
The richness of functions and interdependencies in the relationships of species within ecosystems is also a factor. The actual number of species is therefore only one facet of biodiversity. Does species diversity follow any patterns?
The diversity of species is lowest at the poles and increases toward the equator, with the deserts being obvious exceptions. The areas with the greatest diversity of plant life are the tropical Andes and southeastern Asia.
The Amazon basin, Madagascar and parts of southern and central Africa also compare favorably. Roughly the same holds true for animal life. A single hectare is home toinsect species.
By comparison, only around 30 tree species are native to the United Kingdom. In Amazonas state in Brazil, 95 different species of ants have been counted on a single tree — the numbers are truly mind-boggling.
Again, only around 50 species of ants can be found throughout the UK. How is biodiversity measured? Biodiversity is determined by counting the number of species occurring in a given unit of area.
The greater the species diversity within an area, the higher the biodiversity, which can be calculated using various methods, such as diversity indices. How many species are there on the planet? The critically endangered Cuban crocodile, for example, can only be found in two small habitats in Cuba.
The vaquita, a small porpoise endemic to the northern Gulf of California, is also extremely rare — as ofless than individuals remained. A relative of the vaquita, the baiji or Yangtze River dolphin, has not been sighted since and is presumed extinct. Among primates, the orangutan is, of course, the poster child for endangered species.
The white-headed langur is one of the rarest primates in the world. Only 59 individuals remain — all on a single island in Vietnam. The Yangtze giant softshell turtle is found only in China and Vietnam. How many species go extinct every day?
Many species will have become extinct due to human encroachment on their habitats long before we have discovered the true wealth of biodiversity we are destroying. The United Nations declared to be the International Year of Biodiversity to celebrate life on earth and underscore its precious nature.
Once a species is lost, it is gone forever: The sea cows were hunted to extinction by our ancestors in — only 27 years after they were discovered by Europeans. The list is by no means complete, however.
Why are so many species disappearing? The relentless changes to the environment and habitat destruction by humans are by far the most important factors driving the current mass extinction.
The oceans are also affected by overfishing, pollution, rising temperatures and acidification due to increasing CO2 levels.
What is a biodiversity hotspot? Hotspots are regions characterized by numerous endemic plant and animal species living in a particularly vulnerable environment. In the yearscientists writing in the journal Nature identified 25 biodiversity hotspots that cover only about 1.
All of these hotspots are endangered by factors such as timber harvesting and slash-and-burn clearing driven by strong demand for tropical timber, the expansion of the mining industry and the cultivation of crops such as oil palms, sugar cane and soy.
A further major issue is the dramatic rise of organized, commercial poaching. What are endemic species? Among primates, examples include all of the lemur species that can only be found on the island of Madagascar. Found only in Papua New Guinea, It is the largest butterfly in the world, with a wingspan of 28 cm.
Its caterpillars rely on a single plant species for food — one that is seriously threatened by the destruction of the rainforests.Descriptions and articles about the Bornean Orangutan, scientifically known as Pongo pygmaeus in the Encyclopedia of Life.
Includes Overview; Brief Summary;. Orangutans are generally fruit eaters, because fruit is abundant in the forests they inhabit. They lead a very solitary life. The population continues to decline because of habitat loss, and fewer than 30, orangutans are thought to remain in the wild.
JOIN US ON OUR JOURNEY Our environment is facing so many pressures, from plastic pollution to climate change, from habitat destruction to the unsustainable use . S1 E2 The Son of God Unpacking the unique Kim father-son relationship further, “Son of God” tracks the decline of Kim Il Sung and the rise of his son, Kim Jong Il.
For the first years of his/her life, an infant orangutan holds tight to his/her mother's body as she moves through the forest in search of fruit. Like humans, orangutans have opposable thumbs. Their big toes are also opposable.
English vocabulary word lists and various games, puzzles and quizzes to help you study them.