query: Can we revive old species?
passage: De-extinction
De-extinction, or resurrection biology, or species revivalism is the process of creating an organism, which is either a member of, or resembles an extinct species, or breeding population of such organisms.[1] Cloning is the most widely proposed method, although selective breeding has also been proposed. Similar techniques have been applied to endangered species.
passage: Riparian-zone restoration
A lack of naturally available propagules can be a major limiting factor in restoration success. Therefore, actively planting native vegetation is often crucial for the successful establishment of riparian species. Common methods for actively restoring vegetation include broadcast sowing seed and directly planting seeds, plugs, or seedlings. Reestablishing clonal species such as willows can often be accomplished by simply putting cuttings directly into the ground. To increase survival rates, young plants may need to be protected from herbivory with fencing or tree shelters. Preliminary research suggests that direct-seeding woody species may be more cost-effective than planting container stock.