Termites: Wood Recyclers
These social insects excel at breaking down woody plant material that few other creatures can digest. Each termite processes 10-20mg of cellulose daily, enriching soil with valuable nitrogen compounds. Their gut microbes could potentially be engineered to break down toxic perchlorates in Martian soil. Strict containment would be essential to prevent structural damage to habitats, but sealed bioreactors could safely harness their powerful digestive capabilities.