What are the causes and consequences of loss of biodiversity class 12th?

Habitat loss and fragmentation is the most important cause that is resulting in extinction of plants and animals. Over-exploitation: Human need for natural resources has turned into greed. … Alien species invasions: Some of the alien species turn invasive; resulting in decline or extinction of indigenous species.

What are the causes and consequences of loss of biodiversity?

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. In each case, human beings and their activities play direct roles.

What are the consequences of loss of biodiversity class 12th?

In general, loss of biodiversity in a region may lead to (a) decline in plant production, (b) lowered resistance to environmental perturbations such as drought and (c) increased variability in certain ecosystem processes such as plant productivity, water use, and pest and disease cycles.

What are the consequences of loss of biodiversity?

This lack of biodiversity among crops threatens food security, because varieties may be vulnerable to disease and pests, invasive species, and climate change.

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What are the causes of loss of biodiversity?

CAUSES OF BIODIVERSITY LOSS

  • Climate change.
  • Pollution.
  • Destruction of habitats.
  • Invasive alien species.
  • Overexploitation of the natural environment.

What are the main causes of biodiversity loss Mcq?

The four reasons include Loss of habitat and fragmentation, Over-exploitation of species, Invasion of alien (new) species and Co-extinctions.

What are the consequences of deforestation?

There are several consequences of deforestation:

  • Changes in Soil: Loss of nutrients in the soil that are derived from breakdown of tree leaves. Increased soil erosion by wind and rain. …
  • Loss of biodiversity: Animals and plants that are unable to grow outside of a forest environment face extinction.
  • Climate change:

What are the causes of depletion of biodiversity in India?

Loss of Biodiversity in India: 13 Causes

  • Cause # 1. Habitat Fragmentation:
  • Cause # 2. Introduced Species:
  • Cause # 3. Overexploitation of Plant and Animal Species:
  • Cause # 4. Pollution of Soil, Water and Atmosphere:
  • Cause # 5. Global Climate Change:
  • Cause # 6. …
  • Cause # 7. …
  • Cause # 8.

What is the greatest cause of biodiversity loss today?

Habitat alteration-every human activity can alter the habitat of the organisms around us. Farming, grazing, agriculture, clearing of forests, etc. This is the greatest cause of biodiversity loss today.

What are some examples of biodiversity loss?

On this page:

  • Massive Extinctions From Human Activity.
  • Declining amphibian populations.
  • Reptiles threatened by climate change, deforestation, habitat loss, trade.
  • Dwindling fish stocks.
  • Declining Ocean Biodiversity.
  • Inland water ecosystems.
  • Loss of forests equates to a loss of many species. …
  • Misuse of land and resources.
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What are the consequences of extinction?

What are the consequences of extinction? If a species has a unique function in its ecosystem, its loss can prompt cascading effects through the food chain (a “trophic cascade”), impacting other species and the ecosystem itself.