The loss of biodiversity can not be reversed in a Homo sapiens timescale.

Different visualizations of species biodiversity.

 (A) The distributions of 9927 bird species. (B) The 4964 species with smaller than the median geographical range size. (C) The 1308 species assessed as threatened with a high risk of extinction by BirdLife International for the Red List of Threatened Species of the International Union for Conservation of Nature. (D) The 1080 threatened species with less than the median range size. (D) provides a strong geographical focus on where local conservation actions can have the greatest global impact. Additional biodiversity maps are available at www.biodiversitymapping.org.

Source: "The biodiversity of species and their rates of extinction, distribution, and protection"