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Now showing items 61-70 of 256
Studies of the population ecology, reproductive biology and conservation status of Crescentia portoricensis (Britton) [Bignoniaceae]
(2010)
Crescentia portoricensis Britton [Bignoniaceae] or higüero de sierra as it is commonly
known (Woodbury, 1975) is an endangered shrub, strictly endemic to serpentine derived soils
and to the Maricao and Susúa Forest ...
Revision and phylogeny of the Caribbean genus Apodrosus Marshall, 1922 (Coleoptera: Curculionidae: Entiminae)
(2010)
The Caribbean weevil genus Apodrosus Marshall, 1922 (Coleoptera: Curculionidae: Entiminae: Polydrusini Schoenherr) is revised, including a redescription of A. argentatus Wolcott, 1924 (Dominican Republic, Vieques Island, ...
Anaerobic bioconversion of collagen to methane
(2012)
This thesis reports the use of two anaerobic batch reactors (ABRs) to transform a protein solid waste into a renewable energy source. The “heart” of this type of reactor depends on the microbial community within the reactor, ...
Diversity of moderately halophilic bacteria associated with the soil of the black mangrove, Avicennia germinans
(2011)
Mangroves are complex ecosystems that contribute the coast environment by maintaining
terrestrial and marine food chains, among others. Black mangrove, Avicennia germinans, on
which this study is centered, predominates ...
Bacterias fototróficas anoxigénicas púrpuras no-sulfurosas en la fitotelmata de bromelias en diversos bosques de Puerto Rico
(2009)
Due to the special arrangement of their leaves, plants of the Bromeliaceae family like bromeliad are capable of forming special structures that create an environment called phytotelmata. This aquatic microhabitat serves ...
A bioluminescent bacterial survey from marine ecosystems of Puerto Rico for the determination of their potential use as biosensors
(2011)
Bioluminescence is the phenomenon by which living organisms emit light through an organic
oxidation catalyzed by the enzyme luciferase. These luminescent organisms have been
discovered in all kinds of ecosystems. Among ...
Untangling the effects of biogeography and host plant associations: phylogenetic and phylogeographic studies in the Exophthalmus genus complex
(2011)
Phylogenetic as well as phylogeographic methods were implemented to assess the diversification of Caribbean entimine weevils. (1) A phylogeny of 62 species of entimine weevils (Coleoptera: Curculionidae: Entiminae) in the ...
Abundancia y distribución de Pontodrilus litoralis en las costas cercanas al Faro de Cabo Rojo, Puerto Rico
(2010)
The purpose of this investigation was to determine the structure and dynamics of
the populations of the oligochate Pontodrilus litoralis on the coasts near the Cabo Rojo
Lighthouse in Puerto Rico. During the months of ...
Interaction between the fungus-growing ant Cyphomyrmex minutus and its symbionts at Cambalache Forest, Puerto Rico
(2012)
The ants in the tribe Attini cultivate a fungus (Basidiomycota: Agaricales) as food and protect it from specific mycoparasites, Escovopsis (Ascomycota: Hypocreales), using the antibiotic production capacity of Actinobacteria ...
Genetic diversity and differentiation of Cassava (Manihot esculenta Crantz) accessions in Puerto Rico
(2010)
Cassava is consumed daily by 600 million people living in the poorest places in Africa, Asia
and South America. Natural genetic variation that exists among different cultivars of cassava
has been studied in order to ...