Endemic to a small area in eastern Kauai. Several wild trees died from injuries sustained during Hurricane Iniki in 1992. Only 2 wild plants are known to remain today. The species is threatened by rats feeding on the fruits and competition with alien plants.
Threats to P. viscosa include competition from non-native invasive species such as Psidium cattleianum (strawberry guava) and alien grasses, such as Paspalum conjugatum (Hilo grass). Rats eat the fruit of P. viscosa and are a serious threat to the reprodu
Number of Populations: 1 (USFWS 2001)
Number of Plants: 4 (USFWS 2001)
P. viscosa has been successfully propagated from seed and tissue culture. There are also 20 plants in cultivation. No other conservation efforts have been made (USFWS 1998).
Although many palm seeds do not store well under standard storage methods, tests are a being conducted on cryopreservation by the U.S. Department of Agriculture (USDA) National Seed Storage Laboratory, also known as the National Center for Genetic Resources Preservation (NCGRP).
NTBG currently has ex situ holdings of six plants in the nursery and seven plants in the grounds of the botanical garden that represent two founders from the single population.
1. Construct enclosures to protect P. viscosa against feral ungulates. Emergency actions should be taken to immediately fence the remaining population. Once the enclosure is established, weed management should be performed especially on Hilo grass (Paspalum conjugatum) and strawberry guava (Psidium cattleianum).
2. Reduce the threat of rodent predation by developing a rat control plan.
3. Maintain an adequate genetic stock of P. viscosa. Maintenance of adequate ex situ stock should be continued. Wild seeds should also be collected periodically until the cryopreservation method of long-term storage is perfected. This will ensure that viable seed stock is available for outplanting.
4. Pollination biology and seed dispersal studies are needed.
5. Map genetic diversity in the surviving populations of P. viscosa.
Recommendations derived from M.H. Chapin, M. Maunder, and USFWS (1998).
1. Establish secure ex situ stocks with full founder representation.
2. Develop proper horticultural protocols and pest management for P. viscosa.
3. Survey ex situ holding and conduct molecular fingerprinting.
Recommendations derived from M.H. Chapin and M. Maunder.
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