List any two major causes other than anthropogenic causes of the loss of biodiversity.

Explanation

The two major causes other than anthropogenic causes of the loss of biodiversity are
(i) Alien Species Invasions When alien species are introduced unintentionally or deliberately in a habitat, some of them can cause decline or extinction of indigenous species.
(ii) Co-extinctions When a species becomes extinct, the plant and animal species associated with it, in an obligatory way, also become extinct.