Integrated conservation for Parakmeria omeiensis (Magnoliaceae), a Critically Endangered plant species endemic to south-west China

摘要

Parakmeria omeiensisis a Critically Endangered tree species in the family Magnoliaceae, endemic to south-west China. The tree is functionally dioecious, but little is known about the species' status in the wild. We investigated the range, population size, age structure, habitat characteristics and threats toP. omeiensis. We located a total of 74 individuals in two populations on the steep slopes of Mount Emei, Sichuan province, growing under the canopy of evergreen broadleaved forest in well-drained gravel soil. A male-biased sex ratio, lack of effective pollinating insects, and habitat destruction result in low seed set and poor seedling survival in the wild. We have adopted an integrated conservation approach, including strengthening in situ conservation, cultivation of saplings, ex situ conservation and reintroduction, to protect this species. The successful conservation ofP. omeiensishas important implications for the conservation of the genusParakmeriaand the family Magnoliaceae.