Browsing Facultad de Artes y Ciencias by Issue Date
Now showing items 21-40 of 58
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Comparisons of Earthworm Community Structure between an Active Pasture and an Adjacent Tropical Wet Forest in Puerto Rico
(Caribbean Journal of Science, Vol. 42, No. 3, 311-314, 2006, 2006-12)Earthworm populations have been recognized as indicators of soil fertility and health. To examine the influence of tropical land-use changes on earthworm community structure, we sampled earthworm populations in three plots ... -
The Re-colonization Ability of a Native Earthworm, Estherella spp., in Forests and Pastures in Puerto Rico
(Caribbean Journal of Science, Vol. 42, No. 3, 386-396, 2006, 2006-12)Populations of some native earthworm species are decreasing or disappearing due to human activities like habitat disturbance and introduction of exotic earthworms. Habitat disturbance can cause changes in soil physical ... -
Preliminary Estimate of Earthworm Abundance and Species Richness in Spathodea campanulata Beauv. Forests in Northern Puerto Rico
(Caribbean Journal of Science, Vol. 42, No. 3, 325-330, 2006, 2006-12)The alien tree species Spathodea campanulata forms monodominant stands in abandoned agricultural lands in Puerto Rico. In July 2005, we excavated three replicate randomly located soil pits (25 by 25 by 30 cm) in each of ... -
Hurricane-Related Vagrancy of Swainson’s Thrush and Veery in Puerto Rico
(Caribbean Journal of Science, Vol. 43, No. 1, 150-154, 2007, 2007-06)Low pressure waves that contributed to the formation of Hurricane Wilma in the western Caribbean produced westerly winds in the central Caribbean and Puerto Rico during the second week of October, 2005. On October 12 and ... -
Forests Surrounding the Joyuda Lagoon, Puerto Rico: 67 Years of Change
(Caribbean Journal of Science, Vol. 43, No. 1, 142-147, 2007, 2007-06)This study describes forest cover changes and the current vegetation in the area surrounding the Joyuda Lagoon in western Puerto Rico.Forest cover increased from 22 ha to 87 ha between 1930 to 1997. This increase is the ... -
Meiofaunal Colonization of Decaying Leaves of the Red Mangrove Rhizophora mangle, in Southwestern Puerto Rico
(Caribbean Journal of Science, Vol. 43, No. 1, 127-137, 2007, 2007-06)This study targeted the successional,trophic and taxonomic aspects of nematode assemblages inhabiting fallen Rhizophora mangle leaves in an experiment repeated during two consecutive years. Four replicates of four leaves ... -
Changes in Ant Species Richness and Composition During Plant Secondary Succession in Puerto Rico
(Caribbean Journal of Science, Vol. 43, No. 2, 244-253, 2007, 2007-12)In general, faunal diversity increases with forest age; therefore, we predict that ant species richness in secondary forests will increase during succession and species composition will vary among different stages of ... -
Microbial Utilization of Toxic Chemicals in Surface Waters of Guayanilla Bay, Puerto Rico: Impact of Seasonal Variation
(Caribbean Journal of Science, Vol. 43, No. 2, 172-180, 2007, 2007-12)A study was conducted on the industrial area waters of Guayanilla Bay to determine the potential for microbial utilization of toxic compounds such as fluorene, naphthalene, phenanthrene, phenol and pentachlorophenol (PCP) ... -
Ecophysiology of a Mangrove Forest in Jobos Bay, Puerto Rico
(Caribbean Journal of Science, Vol. 43, No. 2, 200-219, 2007, 2007-12)We studied gas exchange, leaf dimensions, litter production, leaf and litterfall chemistry, nutrient flux to the forest floor, retranslocation rates, and nutrient use efficiency of mangroves in Jobos Bay, Puerto Rico. The ... -
First Report of a Quaternary Crocodylian from a Cave Deposit in Northern Puerto Rico
(Caribbean Journal of Science, Vol. 43, No. 2, 273-277, 2007, 2007-12)The first occurrence of crocodylians from the Quaternary of mainland Puerto Rico is reported from a cave in northern Puerto Rico: this record expands the distribution of crocodylians eastward in the Caribbean region during ... -
Development of a Landforms Model for Puerto Rico and its Application for Land Cover Change Analysis
(Caribbean Journal of Science, Vol. 43, No. 2, 161-171, 2007, 2007-12)Comprehensive analysis of land morphology is essential to supporting a wide range environmental studies. We developed a landforms model that identifies eleven landform units for Puerto Rico based on parameters of land ... -
Variation in Mycorrhizal Infection of the epiphytic orchid Ionopsis utriculariodes (Orchidiaceae) on different substrata
(Caribbean Journal of Science, Vol. 44, No. 1, 130-132, 2008, 2008-03) -
Anoles of St. Vincent (Squamata: Polychrotidae): Population Densities and Structural Habitat Use
(Caribbean Journal of Science, Vol. 44, No. 1, 102-115, 2008, 2008-03)We examined population densities and structural microhabitat use by Anolis griseus and A.trinitatis at eight sites on the leeward (western) coast of St. Vincent, West Indies. Estimates of population density based on the ... -
Coexistence of Feral Africanized and European Honey Bees (Hymenoptera: Apoidea: Apidae) on St. Croix Island
(Caribbean Journal of Science, Vol. 44, No. 2, 264-266, 2008, 2008-07)The first evaluation of the feral population of honey bees on the island of St. Croix, US Virgin Islands is performed. Since Africanized bees had been reported in 1994, we expected that, as in the neighboring island of ... -
Self-compatibility of microgametophytes in Heliconia bihai (Heliconiaceae) from St. Lucia
(Caribbean Journal of Science, Vol. 44, No. 2, 145-149, 2008, 2008-07)Potential for physiological self-incompatibility in Heliconia bihai as a mechanism to promote outcrossing was studied in St. Lucia. Our results do suggest that H. bihai is self-compatible. However, plants vary in their ... -
Diet of feral goats in Mona Island Reserve, Puerto Rico
(Caribbean Journal of Science, Vol. 44, No. 2, 199-205, 2008, 2008-07)The presence of feral goats can have detrimental effects to insular ecosystems where native plants have evolved in the absence of these animals. Goat diet information is valuable in determining which species may be most ... -
Growth of Pinus caribaea hondurensis Relative to Spacing and Trunk Diameter on Two Soils in Puerto Rico
(Caribbean Journal of Science, Vol. 44, No. 2, 236-241, 2008, 2008-07)Analysis of 19-year-old planted Pinus caribaea var. hondurensis on clay and sandy soils in the mountains of Puerto Rico showed the suitability of both sites for tree growth to commercial size. Growth rates were compared ... -
Pharaxonotha portophylla (Coleoptera: Erotylidae), new species and pollinator of Zamia (Zamiaceae) in Puerto Rico
(Caribbean Journal of Science, Vol. 44, No. 3, 321-333, 2008, 2008-12)Pharaxonotha portophylla, new species (Insecta: Coleoptera: Erotylidae: Pharaxonothinae), is described based on individuals collected on the cones of native populations of Zamia amblyphyllidia D. W. Stevenson and Z. ... -
Substratum effects on the growth and survivorship of the sponge Desmapsamma anchorata
(Caribbean Journal of Science, Vol. 44, No. 1, 83-89, 2008, 2008-12)La diversidad de los invertebrados sésiles de los arrecifes coralinos depende enormemente de las asociaciones en el substrato y de las interacciones entre especies. En este trabajo describimos efectos asociados al substrato ... -
The life history of Helminthora anomala (Nemaliales, Rhodophyta) in culture
(Caribbean Journal of Science, Vol. 44, No. 3, 355-360, 2008, 2008-12)The life history of Helmithora anomala Vélez & Vega (Nemaliales, Rhodophyta), collected from Puerto Rico was examined in culture. Carpospores from monoecious plants germinated to form freeliving,uniseriate filamentous micro ...