Spatial variability of phytoplankton absorption coefficients and pigments off Baja California during November 2002

Barocio-León, Óscar A.; Millán-Núñez, Roberto; Santamaría-del-Ángel, Eduardo; González-Silvera, Adriana; Trees, Charles C.

doi:10.1007/s10872-006-0105-z

Cited by 17 publications

(11 citation statements)

References 29 publications

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“…The variability of a ph *(k) was broad: a ph *(440) ranged from 0.016 to 0.181 m 2 mg -1 , with an average of 0.056 ± 0.033 m 2 mg -1 ; a ph *(490) ranged from 0.01 to 0.144 m 2 mg -1 , with an average of 0.036 ± 0.023 m 2 mg -1 ; and a ph *(675) ranged from 0.006 to 0.057 m 2 mg -1 , with an average of 0.021 ± 0.011 m 2 mg -1 . Specific absorption variations present in the blue and red wavelengths were consistent with the results reported in the earlier studies (Bricaud et al, 1995;Braocio-León et al, 2006;Mercado et al, 2007).…”

Section: Specific Phytoplankton Absorption Variationssupporting

confidence: 91%

Specific absorption coefficient and the phytoplankton package effect in Lake Taihu, China

Zha

et al. 2008

Hydrobiologia

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In order to investigate variations of absorption and total chlorophyll-a (TChl-a)-specific absorption coefficient of phytoplankton in Lake Taihu, 57 water samples obtained from Lake Taihu during November 8-22, 2007 were used in this study. Package effect and accessory pigments' influences on the absorption spectra were also examined. Phytoplankton absorption was measured by quality filter technical, and TChl-a concentration was measured by ''hot ethanol'' method. Results yielded significant variations in phytoplankton absorption and TChl-aspecific absorption coefficient. Phytoplankton absorption coefficient at 675 nm is highly correlated to TChl-a concentration, while absorption at 440 nm is less correlated to TChl-a concentration because of great package effect and accessory pigments' influence. There was an inverse relationship between a ph *(k) and TChl-a concentration. Four types of absorption spectra are identified by normalizing a ph *(k) to a ph *(440). The a ph *(k) variation is mainly due to accessory pigments and package effect, whose influence at 675 nm ranges from 83.2% to 28%, with an average of 65.3%. Meanwhile, the wide varying ratio of a ph *(440) to a ph *(675) indicates a large variation range in the ratio of accessory pigment to TChl-a concentration. Those findings are significant to estimate Chl-a concentration based on bio-optical model, estimate primary production from remote sensing, and plan further ecological restoration measures for Lake Taihu.

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Section: Specific Phytoplankton Absorption Variationssupporting

confidence: 91%

Specific absorption coefficient and the phytoplankton package effect in Lake Taihu, China

Zha

et al. 2008

Hydrobiologia

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“…In the absence of phytoplankton blooms, chlorophyll a levels observed in this area by other studies did not exceed 1.65 mg m −3 [17]. Chlorophyll a levels above 2 mg m −3 have been classified as a eutrophic regime by several authors [18][19][20]. In this study, we found that chlorophyll a values above 2 mg m −3 in the Holbox area have been classified as in bloom conditions according to the IOP Index.…”

Section: Discussionsupporting

confidence: 52%

Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

et al. 2018

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Abstract:The Yucatán Peninsula hosts worldwide-known tourism destinations that concentrate most of the Mexico tourism activity. In this region, tourism has exponentially increased over the last years, including wildlife oriented tourism. Rapid tourism development, involving the consequent construction of hotels and tourist commodities, is associated with domestic sewage discharges from septic tanks. In this karstic environment, submarine groundwater discharges are very important and highly vulnerable to anthropogenic pollution. Nutrient loadings are linked to harmful algal blooms, which are an issue of concern to local and federal authorities due to their recurrence and socioeconomic and human health costs. In this study, we used satellite products from MODIS (Moderate Resolution Imaging Spectroradiometer) to calculate and map the satellite Inherent Optical Properties (IOP) Index. We worked with different scenarios considering both holiday and hydrological seasons. Our results showed that the satellite IOP Index allows one to build baseline information in a sustainable mid-term or long-term basis which is key for ecosystem-based management.

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“…In this study, the dominance of microplankton could be observed in the entire study area, with a slight increase in the proportion of picoplankton in the NG region (Figure 2(b)), which is characteristic of zones with more oligotrophic waters [24,26]. The index used to estimate size fraction [19] considers Fucoxanthin and Peridinin to infer the proportion of microplankton, which indicates the presence of diatoms and/or dinoflagellates, respectively (Table 1).…”

Section: Bio-opticalmentioning

confidence: 69%

Bio-Optical Characteristics of the Northern Gulf of California during June 2008

Bastidas-Salamanca

González-Silvera

Millán-Núñez

et al. 2014

International Journal of Oceanography

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Bio-optical variables in the Northern Gulf of California were analyzed usingin situand satellite data obtained during a cruise in June 2008. The study area was divided into three bio-optical regions: Upper Gulf (UG), Northern Gulf (NG), and Great Isles (GI). Each region was characterized according to phytoplankton pigment concentration, phytoplankton and nonpigmented material spectral absorption coefficients, and spectral reflectance. Observed patterns were an indication of the shift in bio-optical conditions from north to south going from turbid and eutrophic waters to mesotrophic ones. Although there was a good agreement between satellite andin situChla(RMSE ±33%), an overestimation ofin situChlawas observed. This was partly explained by the presence of nonalgal particles, as well as the influence of desert and continental aerosols, which is generally overcorrected in the standard processing. The UG and NG could be considered as Case 2 waters, but they did exhibit different bio-optical characteristics. This implies that both biological and optical properties should be invoked to better understand water reflectance variability in the study region and its implications for the remote sensing of Chlaand biogeochemical processes.

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Spatial variability of phytoplankton absorption coefficients and pigments off Baja California during November 2002

Cited by 17 publications

References 29 publications

Specific absorption coefficient and the phytoplankton package effect in Lake Taihu, China

Specific absorption coefficient and the phytoplankton package effect in Lake Taihu, China

Mapping Satellite Inherent Optical Properties Index in Coastal Waters of the Yucatán Peninsula (Mexico)

Bio-Optical Characteristics of the Northern Gulf of California during June 2008

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