Executive assessment
Biodiversity preservation is a civilisation-continuity problem, not only a conservation problem. Food production, soil formation, pollination, disease resistance, pharmaceuticals, industrial enzymes, ecosystem regulation, and cultural knowledge depend on genetic diversity distributed across millions of organisms.
The latest IUCN assessment lists 169,420 evaluated species, of which 47,187 are threatened with extinction—approximately 28% of assessed species.[1] This is not a complete planetary estimate: the IUCN states that fewer than 5% of described species have had their extinction risk evaluated, so the actual number at risk is substantially uncertain.[1]
A lunar archive should therefore preserve:
- Living propagules where feasible: seeds, spores, embryos, sperm, ova, tissue cultures, and whole organisms.
- High-fidelity genome sequences for reconstruction, diagnostics, and future biotechnology.
- Epigenetic, developmental, microbiome, and ecological information, which a DNA sequence alone cannot preserve.
- Representative genetic diversity, not merely one reference genome per species.
- Knowledge required to revive and manage organisms, including husbandry, reproduction, habitat, diet, symbionts, pathogens, and legal provenance.
No single storage technology is sufficient. The robust architecture is redundant: cryogenic biological material plus chemically stable molecular records plus durable digital and analogue documentation.
1. The scale of the extinction risk
The IUCN reports the following proportions among evaluated groups:
- Reef-building corals: 44% threatened
- Amphibians: 41%
- Trees: 38%
- Sharks and rays: 37%
- Conifers: 34%
- Mammals: 26%
- Freshwater fishes: 26%
- Birds: 12%[1]
These values must not be interpreted as the percentage of all species on Earth. The IUCN warns that assessment coverage is incomplete and that changes in the number of listed species partly reflect improved assessment rather than biological change.[1]
For continuity planning, the critical unit is often not the species but the population, lineage, crop variety, breed, or local adaptation. A species can survive while losing:
- Drought tolerance
- Heat tolerance
- Disease resistance
- Pollinator compatibility
- Soil or salinity adaptation
- Behavioral knowledge
- Unique biochemical pathways
- Evolutionary potential
A preservation programme that stores one genome per species may therefore retain a taxonomic label while losing the traits needed for re-establishment.
2. What a genome bank preserves
A genome bank stores biological material or genomic information intended to preserve hereditary information. Its contents may include:
- Extracted DNA
- Whole-genome sequence files
- Cell lines
- Somatic tissue
- Sperm and ova
- Embryos
- Seeds and spores
- Meristem or shoot tissue
- Microbial cultures
- Gametophytes
- Associated microbiomes
The preservation objective should be defined at three levels:
1. Information preservation — a sequence or molecular record sufficient to read genetic information.
2. Biological preservation — viable cells, gametes, embryos, seeds, or tissues capable of regeneration.
3. Functional preservation — an organism and its ecological context capable of surviving, reproducing, and performing its ecosystem role.
Only the second and third levels provide a realistic route to revival. A genome sequence can support synthesis or editing, but it does not automatically provide a viable cell, developmental machinery, maternal environment, symbiotic organisms, or a habitat.
3. Seed banks versus genome banks
| Feature | Seed bank | Genome bank |
|---|---|---|
| Primary material | Seeds, often orthodox seeds that tolerate drying and freezing | DNA, cells, gametes, embryos, tissue cultures, seeds, or sequence data |
| Main strength | Preserves complete plant genomes in living, regenerable form | Covers organisms that do not produce storable seeds and preserves sequence-level information |
| Typical use | Crop restoration, breeding, genetic diversity, food security | Species rescue, livestock and wildlife conservation, research, future reconstruction |
| Biological completeness | Often preserves a complete propagule with embryo, cellular machinery, and some maternal effects | DNA alone lacks cellular and developmental context; cryopreserved cells or embryos are more complete |
| Limitations | Recalcitrant seeds cannot tolerate conventional drying/freezing; clonal crops may require tissue culture | Many species lack reliable cryopreservation, artificial insemination, embryo culture, or cloning methods |
| Restoration pathway | Germinate, multiply, and breed | Depends on material: thaw and fertilise, culture cells, clone, synthesize genome, or edit a related species |
The Svalbard Global Seed Vault, established in 2008, is a major example of long-term crop-security infrastructure. It stores duplicate seed samples rather than replacing national and regional genebanks. Its role is agricultural redundancy, not comprehensive biodiversity preservation.
A seed bank is therefore a specialized form of genome bank, but the terms are not interchangeable. Seed storage preserves many plants as viable organisms-in-potential. Genome banking is broader but often stores less biologically complete material.
4. The Frozen Ark project
The Frozen Ark is an international programme established to preserve genetic material from endangered animals before it is lost. It coordinates institutions that collect and cryopreserve samples such as:
- Sperm
- Eggs
- Embryos
- Tissue
- Somatic cells
- DNA
Its strategic value is that it targets material that conventional seed banks cannot store: mammals, birds, reptiles, amphibians, fish, and invertebrates. The project also preserves samples for research and future assisted reproduction.
The Frozen Ark model demonstrates three requirements for a civilisation archive:
- Distributed custody: samples should be duplicated across geographically separate repositories.
- Material diversity: DNA alone is inadequate; viable cells and reproductive material are more valuable.
- Metadata discipline: each sample requires species identification, geographic origin, collection date, individual identity, sex, pedigree, health status, permits, and storage history.
Cryobanks must also avoid a common failure: preserving many samples from a few captive individuals while omitting wild genetic diversity. Sampling should prioritize unrelated individuals from different populations and environments.