Publication:
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
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