Browsing Departamento de Biología by Title
Now showing items 21-32 of 32
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Life history, population structure, and movement of gobid fishes in tropical urban and non-urban watersheds
(Recinto de Río Piedras, Universidad de Puerto Rico, 2010-02)Concerns about the impacts and threats to stream ecosystems are augmenting as urbanization in Puerto Rico is increasing at a rapid rate. Pollution, channelization and damming are some of these threats associated with ... -
Nutrient Dynamics in the Laguna San Jose a Tropical Urban Lagoon in the San Juan Bay Estuary, Puerto Rico
Globally, anthropogenic nitrogen inputs to coastal ecosystems are causing eutrophication of estuaries and aquatic habitats degradation, thus affecting their biodiversity and trophic structure. Understanding the biogeochemistry ... -
Patterns of Soil Properties and Respiration along an Elevation Gradient in the Luquillo Mountains, Notheastern Puerto Rico
(2012-12)Soil respiration is one of the most important components in the global carbon cycle. It is also one of the primary paths to release carbon fixed by vegetation to the atmosphere. Climate change has direct impacts on soil ... -
Predation on the Tropical Freshwater Schrimp Xiphocaris Elongata: Rostrum Inducibility, Antipredator Responses and Cascade Effects
Predators affect prey indirectly through inducible defenses that are only present when the predator is present, and have a measurable cost. This dissertation is focused on the effects of the predatory fish Agonostomus ... -
Reproduction, Sex Ratio and Bacterial Communities of the Coffee Berry Borer Hypothenemus Hampei F. (Coleoptera: Curculionidae)
The coffee berry borer (CBB) Hypothenemus hampei is the world's most devastating coffee pest. Knowledge of the factors that affect its biology and ecology is an important tool to give effective management recommendations ... -
Reproductive Phenology, Fecundity, Survival and Growth of Puerto Rican Anolis Lizards in the Context of Climate Warming
Anolis lizards are vulnerable to climate warming because, like other ectotherms, their basic physiological functions (e.g., locomotion, growth and reproduction) are strongly influenced by environmental temperature. However, ... -
Resistencia al Acido Hipocloroso en Vibrio fischeri
Vibrio fischeri es una bacteria bioluminiscente marina, que forma una simbiosis específica con el calamar hawaiano, Euprymna escolopes. El calamar produce especies reactivas de oxigeno, incluyendo ácido hipocloroso (HOCl), ... -
Role of the Orphan Nuclear Receptor Nurr1 in Long Term Memory of Context Fear Conditioning
Learning requires the continued ability of the brain to establish new synaptic configurations and could be viewed as the continuation of the developmental process. Disrupting the normal balance between the stable fixation ... -
Soil Respiration of a Novel Subtropical Moist Forest: From Diel to Seasonal Patterns
Soil respiration is the largest natural flux of carbon dioxide (CO2) to the atmosphere, often accounting for as much as 50 percent of global gross productivity. As tropical and subtropical forests sustain the highest ... -
Spatial Dynamics and Drivers of Land Use and Land Cover Change in Colombia: Implications for Biodiversity Conservation
This dissertation focuses on understanding different aspects of land use and land cover change in Colombia from 2001 to 2010 and the implications for biodiversity conservation. Land use and land cover dynamics during the ... -
The Cholinergic Anti-Inflammatory Response in the HIV Context
Recent studies demonstrate that the central nervous system (CNS) and immune system interact with each other through a vagus nerve-dependent mechanism that involves afferent stimulation from peripheral inflammatory cytokines ... -
The Reproductive Biology of Zamia (Cycadales: Zamiaceae) in Puerto Rico: Implications for Patterns of Genetic Structure and Species Conservation
Variation in plant reproductive success is affected by how ecological conditions interact with a plant’s sexual, mating, and pollination systems. Long-term viability of natural populations is dependent on the maintenance ...