What Are the Biggest Threats to Biodiversity?

In this what are the biggest threats to biodiversity? post we have briefly explained about threats to biodiversity such as pollution, exotic species, diseases, etc. Read on to learn more about biodiversity threats!

Biodiversity is considered as a reservoir of resources to be used for the manufacture of food, medicine, industrial products, etc. But with an increased demand of rapid population growth, biodiversity is gradually depleting. A number of plants” and animal species have already become extinct and many are endangered due to biodiversity threats.

What Are the Biggest Threats to Biodiversity?

Threats to Biodiversity

What Are the Biggest Threats to Biodiversity?, Image Source: https://www.cell.com/trends/ecology-evolution/fulltext/S0169-5347(19)30104-1

Biodiversity Threats

Habitat destruction

The primary cause of loss of biodiversity is habitat loss or destruction which is resulted due to the large industrial and commercial activities associated with agriculture, irrigation, construction of dams, mining, fishing etc an major biodiversity threats.

Habitat fragmentation

With increased population an another biodiversity threats, the habitats are fragmented into pieces by roads, fields, canals, power lines, towns etc. The isolated fragment of habitats restricts the potential of species for dispersal and colonization. In addition, the habitat fragmentation also brings about microclimatic changes in light, temperature, wind etc.


The most dreaded biodiversity threats inducing loss of biodiversity is environmental pollution which include air pollution, Water pollution, industrial pollution, pollution due to chemical Pastes, pesticides radioactive materials etc.

Over exploitation

The natural resources are over exploited to meet growing rural poverty, intensive technological growth and globalization of economy. All these factors together may be responsible for the extinction of a number of species.

Exotic species

Exotic species have a severe effect on native biota, causing native species to decline or even extinction, as well as significantly impacting ecosystems. They reproduce quickly, outcompete native species for food, water, and space, and are a major contributor to global biodiversity loss.


Since the animals are more vulnerable to infection, the anthropological activities may increase the incidence of diseases in wild species, leading to their extinction and biodiversity threats.

Jhum cultivation

An amount of 100 to 250 metric tons of topsoil per hectare are depleted per year due to jhum cultivation. The shifting or Jhum cultivation by poor tribal people greatly affects the forest structure which is a store house of biodiversity.

Poaching of wild life

The illegal hunting and harvesting of animals is the second biggest direct biodiversity threats to species after habitat destruction. Poaching poses a growing threat to animals such as elephants and rhinos, as well as to smaller creatures, including certain lizards and monkeys.

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