Publication:
Optical properties and photochemical response of colored dissolved organic matter (cdom) at Jobos Bay National Estuarine Research Reserve (JOBANERR), Puerto Rico
Optical properties and photochemical response of colored dissolved organic matter (cdom) at Jobos Bay National Estuarine Research Reserve (JOBANERR), Puerto Rico
dc.contributor.advisor | Corredor, Jorge E. | |
dc.contributor.author | Ortiz-Rosa, Suhey | |
dc.contributor.college | College of Arts and Sciences - Sciences | en_US |
dc.contributor.committee | Morell, Julio | |
dc.contributor.committee | López, José M. | |
dc.contributor.committee | Aponte, Nilda | |
dc.contributor.department | Department of Marine Sciences | en_US |
dc.contributor.representative | Gove, Kurt | |
dc.date.accessioned | 2018-12-06T14:41:51Z | |
dc.date.available | 2018-12-06T14:41:51Z | |
dc.date.issued | 2010-12 | |
dc.description.abstract | The study evaluated the optical properties and dynamics of CDOM in JOBANERR. CDOM absorption coefficient spectrum (aCDOM), Slope (S), excitation emission matrix (EEM) fluorescence and Parallel Factor Analysis (PARAFAC) were used to characterize sources of CDOM. S values varied from 0.014–0.034 nm-1 and aCDOM ranged from 0.11m-1 to 11 m-1. Mar Negro presented a strong terrestrial source of CDOM while Mar Blanco is a transitional area combining terrestrial and marine CDOM sources. Barca presented a strong marine source and it is influenced by terrestrial sources in wet months. Spatial differences were observed between mangrove semi-enclosed areas and open areas of the bay. Significant differences were found on DOC, salinity and slope parameters seasonally between the study sites. Dissolved Organic Carbon (DOC), aCDOM and fluorescence intensity of the main fluorophores (C, M, A, H) were related to salinity, chlorophyll, and UV dose. DOC and aCDOM presented a low correlation (R2 = 0.16). UV dose correlated with aCDOM (Pearson coefficient = -0.98) in an exponential decay. Chlorophyll correlated with aCDOM (Pearson coefficient = 0.73). PARAFAC showed seven components in samples exposed to sunlight described as humic-like, protein-like, degradation or microbial substances. Two principal processes transform CDOM: photodegradation and dilution. The high variability of CDOM signatures in Jobos waters are explained by chemical transformations of CDOM. | en_US |
dc.description.abstract | Se estudiaron las propiedades ópticas y la dinámica de MODC en JOBANERR. La caracterización de MODC se realizó por análisis de absorción (aMODC) y pendiente (S) espectral, fluorescencia por matrices de Excitación-Emisión (EEM) y Análisis “Parallel Factor” (PARAFAC por sus siglas en ingles). Los valores de S varían de 0.014-0.034 nm-1 y aMODC de 0.11m-1 a 11 m-1. Mar Negro presentó una señal fuerte de MODC terrestre, Mar Blanco presentó señales terrestres y marinas y Barca una señal marina influenciada por fuentes terrestres durante periodos de lluvia. Diferencias espaciales y temporales entre las áreas de manglar y las aguas fuera de la bahía fueron determinadas. Medidas de carbono orgánico disuelto (DOC), aMODC, y la intensidad de fluorescencia de los fluoróforos principales (C, M, A, H) fueron relacionadas con medidas de salinidad, clorofila y dosis de luz UV. DOC and aCDOM presentaron una correlación positiva baja (R2 = 0.16). Se observó una correlación significativa entre UV y aMODC la cual mostró decaimiento exponencial (Coeficiente Pearson = -0.98). La clorofila presentó una correlación positiva con aCDOM (Coeficiente Pearson = 0.73). A través de PARAFAC, siete componentes se identificaron en las muestras expuestas a la luz. Estos se encuentran representados por material húmico, proteínas, materia derivada de la degradación microbiana y productos de fotólisis. La alta variabilidad en las señales de MODC en JOBANERR puede ser explicada principalmente por fotodegración, con una influencia menor por dilución. | en_US |
dc.description.graduationSemester | Fall | en_US |
dc.description.graduationYear | 2010 | en_US |
dc.description.sponsorship | National Estuarine Research Reserve System under award no. NA07NOS4200049 from the Estuarine Reserves Division, Office of Ocean and Coastal Resource Management, NOAA | en_US |
dc.identifier.uri | https://hdl.handle.net/20.500.11801/1597 | |
dc.language.iso | en | en_US |
dc.rights.holder | (c) 2010 Suhey Ortiz Rosa | en_US |
dc.rights.license | All rights reserved | en_US |
dc.subject | Chromophoric dissolved organic matter - Jobos Bay - Puerto Rico | en_US |
dc.subject | Chromophoric dissolved organic matter - Photobiology of | en_US |
dc.subject | Phytoplankton - photosynthetic active radiation | en_US |
dc.subject.lcsh | Seawater -- Optical properties | en_US |
dc.subject.lcsh | Jobos Bay National Estuarine Research Reserve (P.R.) | en_US |
dc.subject.lcsh | Seawater -- Organic compound content --Puerto Rico -- Jobos Bay | en_US |
dc.title | Optical properties and photochemical response of colored dissolved organic matter (cdom) at Jobos Bay National Estuarine Research Reserve (JOBANERR), Puerto Rico | en_US |
dc.type | Thesis | en_US |
dspace.entity.type | Publication | |
thesis.degree.discipline | Marine Sciences | en_US |
thesis.degree.level | M.S. | en_US |