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dc.contributor.advisorArmstrong, Roy A.
dc.contributor.authorVega Rodríguez, María
dc.date.accessioned2018-12-04T17:09:31Z
dc.date.available2018-12-04T17:09:31Z
dc.date.issued2008
dc.identifier.urihttps://hdl.handle.net/20.500.11801/1583
dc.description.abstractMangroves are considered dominant primary producers in many tropical and subtropical coastlines. In recent years, modeling of primary productivity (PP) and net primary productivity (NPP) in terrestrial ecosystems has been a subject of increasing interest because of the importance of the terrestrial carbon cycle in the global carbon budget and in climate change. Various studies have reported that leaf area index (LAI), litterfall and nutrient dynamics are some essential parameters related to the photosynthetic capacity of the mangrove ecosystems. The overall objective of this research was to determine PP of the red mangrove, Rhizophora mangle, in the Natural Marine Reserve of La Parguera, Puerto Rico, using both field measurements and remote sensing techniques. Spatial and temporal trends in LAI, litterfall and nutrients exhibited a temporal variation that was mostly influenced by air temperature and salinity. Remineralized nutrients from leaf litter or exogenous nutrient inputs were the driving force for the observed spatial dynamics of primary productivity within these mangrove forests. The remotely-sensed normalized-difference vegetation index (NDVI) was highly correlated with field-measured mangrove LAI. Accordingly, LAI maps of the study site were derived from IKONOS satellite imagery. LAI derived values were transformed to net primary productivity maps. Spatial variations of the NPP were clearly detected from remotely sensed images and can possibly be used to explain ecological patterns of LAI and leaf fall.en_US
dc.description.abstractRecientemente, los estudios para el modelaje de la productividad primaria (PP) y la productividad primaria neta (PPN) han cobrado mayor interés dado a la importancia que tienen los ecosistemas terrestres en el presupuesto global del ciclo de carbono y el cambio climático. El índice de área foliar (IAF), la caída de hojarasca y la dinámica de nutrientes son parámetros fundamentales que promueven la capacidad fotosintética del manglar. El objetivo principal de este estudio fue determinar la PP del mangle rojo, Rhizophora mangle, dentro de la Reserva Marina Natural de La Parguera, Puerto Rico, utilizando no sólo datos de campo sino también la tecnología de percepción remota. Los patrones temporales y espaciales en el índice de IAF, la caída de hojarasca y los nutrientes demostraron ser influenciados principalmente por variaciones en temperatura del aire y salinidad. La remineralización de nutrientes provenientes de la hojarasca y la entrada de nutrientes exógenos resultó ser el elemento influyente en la dinámica espacial de PP observadas en estos bosques de mangle rojo. El índice de diferencia normalizada de vegetación (NDVI por sus siglas en inglés) obtenida con la percepción remota está altamente correlacionado con las estimaciones tomadas en el campo del IAF del mangle rojo. Consecuentemente, mapas del IAF fueron derivadas de una imagen de satélite de IKONOS. Luego se transformó el mapa de IAF a uno de PPN. Las variaciones espaciales para la PPN fueron claramente detectadas a través de las imágenes satelitales y esto podría servir para explicar patrones ecológicos tales como IAF y caída de hojas.en_US
dc.description.sponsorshipBio-Optical Laboratory; Chemical Oceanography Laboratory; Sea Grant Program from the UPR, Mayaguez Campusen_US
dc.language.isoenen_US
dc.subjectRed mangrove – Production - Reserva Natural de La Parguera (P.R.)en_US
dc.subjectEcological patterns of leaf area index – Red mangrove - Reserva Natural de La Parguera (P.R.)en_US
dc.subject.lcshRed mangrove--Puerto Rico.en_US
dc.titleEstimating primary productivity of red mangroves in southwestern Puerto Rico from remote sensing and field measurementsen_US
dc.typeThesisen_US
dc.rights.licenseAll rights reserveden_US
dc.rights.holder(c) 2008 María Vega Rodríguezen_US
dc.contributor.committeeGilbes, Fernando
dc.contributor.committeeLópez, José M.
dc.contributor.committeeFernandez del Viso, Denny
dc.contributor.committeeAponte, Nilda E.
dc.contributor.representativeGrove, Kurt
thesis.degree.levelM.S.en_US
thesis.degree.disciplineMarine Sciencesen_US
dc.contributor.collegeCollege of Arts and Sciences - Sciencesen_US
dc.contributor.departmentDepartment of Marine Sciencesen_US
dc.description.graduationSemesterSpringen_US
dc.description.graduationYear2008en_US


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