De-Extinction & Resurrection Biology: Pros and Cons

DE-EXTINCTION: RESURRECTION BIOLOGY

Pros, Cons, and the Future of Biodiversity

THE URGENCY: BIODIVERSITY LOSS

The IPBES 2019 report indicates extinction rates are accelerating. De-extinction is proposed as a potential countermeasure.

WHAT IS DE-EXTINCTION?

The process of creating an organism that is a member of, or resembles, an extinct species.

Also known as Resurrection Biology.

Does not create exact copies, but functional equivalents.

HOW IT WORKS: THE SCIENCE

1. DNA Recovery: Extracting genetic material from fossils.

2. CRISPR Editing: Editing the genome of a close living relative.

3. Surrogate Parenting: Using a living mother to carry the embryo.

KEY CANDIDATES

Woolly Mammoth

Tasmanian Tiger

Passenger Pigeon

PRO: ECOSYSTEM RESTORATION

Keystone species like mammoths can convert tundra to grassland.

This helps keeps the permafrost frozen, fighting climate change.

PRO: SCIENTIFIC ADVANCEMENT

Developing 'Genetic Rescue' tools for endangered species.

Example: Using frozen DNA to rescue the Black-footed Ferret.

CON: HABITAT & DISEASE

The original habitats of these animals often no longer exist due to human development.

Risk: Introduction of ancient viruses or pathogens.

Risk: Conflict with modern species (Invasive species effect).

CON: RESOURCE ALLOCATION

Is it ethical to spend millions on one ghost species while living species go extinct?

Cost Estimate: Millions of USD per project vs. limited conservation funding.

NATURAL VS HUMAN-CAUSED EXTINCTION

Natural Process

Gradual evolution, background extinction rate (1-5 species/year).

Human-Caused

Habitat loss, pollution, hunting. Rate is 1,000x higher than background [Ceballos et al., 2015].

SUMMARY

PROS: • Restores lost ecosystems • Advances genetic science • Fixes human mistakes

CONS: • Animal suffering risk • Diverts money from conservation • Unpredictable ecological effects

REFERENCES

[1] IPBES (2019). Global Assessment Report on Biodiversity and Ecosystem Services. [2] Ceballos, G., et al. (2015). Accelerated modern human-induced species losses. [3] IUCN Red List of Threatened Species. [4] Revive & Restore (Resurrection Biology Projects).