Your question: What are the patterns of biodiversity class 12?

The ecologists studied biodiversity in the environment and observed a regular pattern in which diversity was distributed over the entire area of the planet. Darwin* noticed three distinctive patterns of biological diversity: (1) Species vary globally, (2) species vary locally, and (3) species vary over time.

What are the patterns of biodiversity?

Biodiversity patterns occur within species, communities, habitats, regions, ecosystems, biomes and the entire Earth. The within-species diversity is studied as genetic diversity (cf. Sect. 6.1) and refers to the total number of characteristics in the genetic composition of a species.

Which is well known pattern of biodiversity?

Latitudinal gradient – This is the most well-defined and well-known pattern of biodiversity studies till date. According to this pattern, the species diversity follows a regular pattern as we move from the equator to the polar regions.

What is biodiversity pattern in India?

India has only 2.4% of the world’s land area. But India’s share of the global species diversity is 8.1%. Nearly 45,000 species of plants and about 90,000 species of animals have been recorded from India.

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What are different patterns of biodiversity describe latitudinal gradients?

Latitudinal gradients of biodiversity are biogeographic patterns that define the way in which components of taxonomic, phylogenetic, functional, genetic, or phenetic dimensions change with latitudinal position on the surface of the earth.

What are the 3 patterns of biodiversity?

Darwin noticed three distinctive patterns of biological diversity: (1) Species vary globally, (2) species vary locally, and (3) species vary over time. – different, yet similar, animal species inhabited separated, but similar, habitats around the globe.

Does biodiversity follow any patterns?

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. Tropical rainforests and coral reefs are among the planet’s richest and most complex ecosystems.

What is global pattern of biodiversity?

Biodiversity is the degree of variation of life forms within a given ecosystem, biome, or an entire planet. Biodiversity is a measure of the health of ecosystems. Biodiversity is in part a function of climate. In terrestrial habitats, tropical regions are typically rich whereas Polar Regions support fewer species.

Which is the most well known pattern?

Checkered. One of the most popular and instantly recognizable patterns on the market, checked, or checkered, fabrics feature a simple checkerboard-style design with alternating colored squares.

What drives large scale patterns of biodiversity on Earth?

Recent debate has questioned whether biodiversity patterns are shaped by local or continental-scale factors (Borregaard et al., 2020); global drivers include climate trends, latitudinal gradients, evolutionary processes and speciation while local disturbance factors include agricultural activity, erosion, grazing …

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What is ecological diversity class 12th?

(c) Ecological diversity is the diversity at ecosystem level. For example, India with its deserts, rain forests, mangroves, coral reefs, wetlands, estuaries and alpine meadows has a greater ecosystem diversity. 2. Global species diversity means total species present on the earth.

What are the patterns of bio diversity species richness decreases if we move from equator to pole justify the statement with reason?

Speciation is generally a function of time and environmental stability, so if conditions are too harsh, it is difficult for the species to survive and adapt. This results in decrease in biodiversity towards the poles. Species diversity decreases as we move away from the equator towards the poles.

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.