Publication:
A study of Randia portoricensis (Urb.) Britton & Standley [Bubiaceae]: a rare species

dc.contributor.advisor Breckon, Gary J.
dc.contributor.author Román-Guzmán, Javier A.
dc.contributor.college College of Arts and Sciences - Sciences en_US
dc.contributor.committee Lewis, Allen
dc.contributor.committee Kolterman, Duane
dc.contributor.department Department of Biology en_US
dc.contributor.representative Van Bloem, Skip
dc.date.accessioned 2018-05-16T17:06:25Z
dc.date.available 2018-05-16T17:06:25Z
dc.date.issued 2006
dc.description.abstract Randia portoricensis (Rubiaceae) is an endemic shrub known historically from two locations in Guánica and Yauco. Six populations, including one found in 1992 at Montes de Barina in Yauco, with a total of 38 adults and 40 seedlings were located. The two populations on private land are threatened by cutting and development. Four small populations occurred in Guánica Forest Reserve. Between 1992 and 2005, 44 individuals in the Barina population were lost, which accounted for 54 % of the known plants. The species is dioecious with sphingid moths being the most likely pollinator. Fruits were found in five populations; two populations had seedlings. There was no evidence of fruit dispersal. Randia portoricensis meets three of the five possible IUCN criteria for listing as Critically Endangered. Propagation protocols and a strategy for the introduction of 50 juvenile plants to the four existing populations at Guánica Forest were developed. en_US
dc.description.abstract Randia portoricensis (Rubiaceae) es un arbusto endémico que históricamente se conoce en Guánica y Yauco. A través de este estudio se localizaron seis poblaciones con 38 individuos adultos y 40 plántulas, incluyendo un localizada en 1992 en Montes de Barina, Yauco. Las dos poblaciones que se encuentran en propiedad privada se encuentran amenazadas por desarrollo y poda. En el Bosque de Guánica se encuentran cuatro poblaciones pequeñas. Cuarenta y cuatro individuos han desaparecido en la población de Barina entre 1992 y 2004, lo que equivale a un 54 % de las plantas conocidas. La especie es dioica, siendo los esfinges los mejores candidatos como polinizadores. No hay evidencia alguna en cuanto a dispersores. Randia portoricensis cumple con tres de los cinco criterios de la IUCN para ser enlistada como en Peligro Crítico. Por último, se desarrollaron protocolos para la propagación y estrategias para la introducción de plantas juveniles en las cuatro poblaciones existentes del Bosque de Guánica. en_US
dc.description.graduationYear 2006 en_US
dc.description.sponsorship Environmental and Natural Resource Department (DRNA in spanish) for accepting plants from the nursery and for all the permits to work in the forest. U. S. FWS for their summer support. en_US
dc.identifier.uri https://hdl.handle.net/20.500.11801/631
dc.language.iso en en_US
dc.rights.holder (c) 2006 Javier A. Román-Guzmán en_US
dc.rights.license All rights reserved en_US
dc.subject Randia portoricensis (Rubiaceae) en_US
dc.subject Endemic shrub en_US
dc.subject Montes de Barina in Yauco en_US
dc.subject.lcsh Rubiaceae--Habitat--Puerto Rico--Guánica en_US
dc.subject.lcsh Randia portoricensis en_US
dc.title A study of Randia portoricensis (Urb.) Britton & Standley [Bubiaceae]: a rare species en_US
dc.type Thesis en_US
dspace.entity.type Publication
thesis.degree.discipline Biology en_US
thesis.degree.level M.S. en_US
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