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Why is genetic diversity important in restored plant populations?
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ecological restoration
Wetland restoration along the Târnava Mică (Tîrnava Mică) River in Romania. A former gravel mine (left) was transformed into a functional wetland (right).
In the context of ecological restoration, genetic diversity is vital because it provides restored plant populations with a greater capacity to survive and adapt to environmental changes.1
Maintaining high genetic diversity is essential for several reasons:
- Resilience to Change: Environments are dynamic, and genetic variation allows populations to respond evolutionarily to shifting conditions, including changes in weather, climate, and the presence of pests, predators, or competitors.21
- Disease Resistance: Genetic diversity can provide the raw material for natural selection to favor individuals with resistance to pathogens. Without this variation, a population may lack the necessary genes to counter evolving threats.23
- Mitigating Small Population Risks: Restored sites are often small or isolated, which increases the risk of inbreeding and the loss of alleles through genetic drift. By collecting seeds from a large number of source individuals, restorationists can bolster genetic diversity and reduce the risk of local extinction.21
Ultimately, maximizing genetic diversity helps create a more sustainable and robust ecosystem capable of long-term survival.1