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How is biodiversity distributed across the earth?

How is biodiversity distributed across the earth?

Biodiversity is unevenly distributed across the planet. A range of factors contribute to this distribution, including the global climatic gradient, the current and historical distribution of land masses, and geographical barriers, such as mountains.

What is the variation of biodiversity?

Variation in biodiversity implies 1) that different locations have been subject to different environmental impacts, and 2) that different locations have different availabilities of resources (= usable energy).

What affects the biodiversity on Earth?

Much of the Earth’s biodiversity, however, is in jeopardy due to human consumption and other activities that disturb and even destroy ecosystems. Pollution, climate change, and population growth are all threats to biodiversity. These threats have caused an unprecedented rise in the rate of species extinction.

How has the biodiversity on Earth changed over time?

The number of species on the planet, or in any geographical area, is the result of an equilibrium of two evolutionary processes that are ongoing: speciation and extinction. Sudden and dramatic losses of biodiversity, called mass extinctions, have occurred five times. …

What are the 4 types of biodiversity?

Four Types of Biodiversity

  • Species Diversity. Every ecosystem contains a unique collection of species, all interacting with each other.
  • Genetic Diversity. Genetic diversity describes how closely related the members of one species are in a given ecosystem.
  • Ecosystem Diversity.
  • Functional Diversity.

What would be the most effective way for humans to reduce the loss of biodiversity?

Maintain wetlands by conserving water and reducing irrigation. Avoid draining water bodies on your property. Construct fences to protect riparian areas and other sensitive habitats from trampling and other disturbances. Manage livestock grazing to maintain good quality range conditions.

Which ecosystem is richest in biodiversity?

Amazonia represents the quintessence of biodiversity – the richest ecosystem on earth. Yet a study by Smithsonian scientists, published this week in the journal Science, shows that differences in species composition of tropical forests are greater over distance in Panama than in Amazonia.

What are the 5 factors that affect biodiversity?

Important direct drivers affecting biodiversity are habitat change, climate change, invasive species, overexploitation, and pollution (CF4, C3, C4.

What is the most important cause of biodiversity loss?

Answer : The most important cause of biodiversity loss is Habitat loss and fragmentation. This drives the animals and plants to rapid extinction. When the large forests or areas are broken down into smaller fragments, the migratory birds and animals tend to lose their habitat leading to their extinction.

What are the 5 main reasons for biodiversity decline?

Biodiversity loss is caused by five primary drivers: habitat loss, invasive species, overexploitation (extreme hunting and fishing pressure), pollution, climate change associated with global warming.

What are the main causes of biodiversity loss?


  • Climate change.
  • Pollution.
  • Destruction of habitats.
  • Invasive alien species.
  • Overexploitation of the natural environment.
  • Extinction of species.
  • Threat to human beings.
  • Proliferation of pests.

How do humans contribute to the loss of biodiversity?

Direct or indirect actions by humans have resulted in the decrease of biodiversity. Some of the direct human drivers are changes in local land use and land cover, species introductions or removals, external inputs, harvesting, air and water pollution, and climate change (Climate, 2005).

How is biodiversity being threatened on the Earth?

Biodiversity Biodiversity refers to the variety of living species on Earth, including plants, animals, bacteria, and fungi. While Earth’s biodiversity is so rich that many species have yet to be discovered, many species are being threatened with extinction due to human activities, putting the Earth’s magnificent biodiversity at risk.

What are the patterns of biodiversity around the world?

Geographers, ecologists, and conservation biologists have learned a great deal about the patterns of biodiversity around the planet. One pattern that’s important to recognize for our purposes is that the number of species is much higher near the equator and decreases as you move toward the poles.

How is the diversity of life on Earth distributed?

Biodiversity, the variety of life, is distributed heterogeneously across the Earth. Some areas teem with biological variation (for example, some moist tropical forests and coral reefs), others are virtually devoid of life (for example, some deserts and polar regions), and most fall somewhere in between.

Which is the best definition of the term biodiversity?

Biodiversity. Biodiversity is a term used to describe the enormous variety of life on Earth. It can be used more specifically to refer to all of the species in one region or ecosystem. Biodiversity refers to every living thing, including plants, bacteria, animals, and humans.