Skip to Main Content
Characteristics of the Psidium cattleianum (Myrtaceae) Seed bank in Hawaiian lowland wet forestsAuthor(s): Amanda L. Uowolo; Julie S. Denslow
Source: Pacific Science 62(1):129-135
Publication Series: Scientific Journal (JRNL)
Download Publication (316.63 KB)
DescriptionPsidium cattleianum Sabine (strawberry guava) is one of Hawai‘i’s most disruptive alien plants. Dense stands can suppress growth and establishment of native species, support high populations of crop-damaging fruit flies, and preclude restoration or management of native forests. Our research investigated factors affecting persistence of P. cattleianum seeds in lowland wet forest soils. We collected soil cores from four forested sites immediately after fruit fall and 6.5 months later. We found abundant germination of P. cattleianum seeds immediately after fruit drop. Soil collected under mature P. cattleianum clumps yielded 761 viable seeds/m2. We found no viable seeds 6.5 months after fruit drop. We evaluated seed longevity using seed bags buried below the litter layer that we retrieved after 28, 56, 196, and 365 days. Seeds either germinated or deteriorated rapidly after fruit drop; after 28 days, 22.3% of the buried seeds were viable and there were no viable seeds at 196 days. Predator effects were assessed using trays with a known number of seeds with and without predator exclosures. After 28 days, 37% of the seeds in the open trays were damaged by predators. The lack of a persistent seed bank likely is due to a combination of rapid, high germination rates, postdispersal seed predation, and seed mortality. We suggest that chemical or mechanical control efforts would be most efficient and effective if conducted at least 3 months after the fruiting season, when the vast majority of seeds have either germinated or died.
- You may send email to firstname.lastname@example.org to request a hard copy of this publication.
- (Please specify exactly which publication you are requesting and your mailing address.)
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
CitationUowolo, Amanda L.; Denslow, Julie S. 2008. Characteristics of the Psidium cattleianum (Myrtaceae) Seed bank in Hawaiian lowland wet forests. Pacific Science 62(1):129-135.
KeywordsPsidium cattleianum, strawberry guava, invasive species, seed longevity, lowland wet forest
- Managing conflict over biological control: the case of strawberry guava in Hawaii
- Soil and hydrological responses to wild pig (Sus scofa) exclusion from native and strawberry guava (Psidium cattleianum)-invaded tropical montane wet forests
- Determining subcanopy Psidium cattleianum invasion in Hawaiian forests using imaging spectroscopy
XML: View XML