Which term is used to describe the four major causes of biodiversity losses?

The Evil Quartet

The correct answer is Option (3) –The Evil Quartet

The term used to describe the four major causes of biodiversity losses is "The Evil Quartet." This term refers to the four primary drivers that contribute to the accelerated rates of species extinctions and overall biodiversity decline:

1. Habitat loss and fragmentation: The destruction and degradation of natural habitats, as well as the division of large habitats into smaller, isolated patches.
2. Over-exploitation: Unsustainable harvesting or hunting of species, leading to population declines and depletion of resources.
3. Alien species (invasive species): Introduction of non-native species into new environments, disrupting local ecosystems and outcompeting native species.
4. Co-extinctions: When a species becomes extinct, the plant and animal species associated with it in an obligatory way also become extinct. When a host fish species becomes extinct, its unique assemblage of parasites also meets the same fate.

"The Evil Quartet" highlights the significant role of human activities in driving biodiversity losses and emphasizes the urgency of addressing these challenges through conservation efforts and sustainable practices.