Adaptive Management Lessons for Serianthes nelsonii Conservation

The literature covering the biology, ecology, horticulture, and conservation of critically endangered tree Serianthes nelsonii Merr. was reviewed. roots, stems, leaves this charismatic legume revealed highly plastic traits responded positively to horticultural manipulations improve quality container-grown transplants. Pre-sowing seed treatments coat scarification 1 h imbibition generated 85% 90% germination at a temperature optimum 26 °C. Adventitious root formation on air layers successful unions approach grafts were 100%. Seedling sapling growth maximum under 25% 50% sunlight transmission, limited irrigation ensure adequate zone aeration, repetitive stem tip pruning increase root:shoot quotient, thigmic stress retain an orthotropic orientation stems. In situ regeneration Guam substantial but recruitment from seedling nil. High leaf litter chemistry enabled rapid decomposition, soils beneath exhibited unique chemical that increased ecosystem health by creating spatial heterogeneity. greatest unanswered questions focus plant mortality. Research is needed determine reasons for mortality in seedlings, within transplantation projects Guam, 60% mature population during 26-year implementation national recovery plan. Horticultural researchers are ideally positioned answer these urgent questions.