Adenosine triphosphate (ATP) and chlorophyll a biomass as eutrophication indices in one of the most polluted basins off Alexandria coastal waters, Egypt

Aboul-Kassim, Tarek A. T.; Dowidar, N. M.; El-Nady, F. E.; Abdel-Moati, A.R.

doi:10.1016/b978-0-444-89990-3.50068-7

Cited by 1 publication

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“…3 Haifa Bay, at the northern part ofthe Israeli Mediterranean coast, is affected by heavy loads of anthropogenic origin, and the consequent concentrations of detritus and algae are far above those found elsewhere along the coast, let alone the open sea.' Occasional blooms of dinoflagellates and diatoms which occur in the area of Haifa Bay, in the spring time, cause a typical "red tide", and they are presumably influenced by man-made processes.6 All round the year concentrations of dissolved and particulate matter vary in space and time and a monitoring program of the Haifa Bay seems mandatory for rational management ofthis active sea area.…”

Section: Introductionmentioning

confidence: 99%

<title>Remote estimation of chlorophyll concentration in polluted marine waters in Haifa Bay, Southeastern Mediterranean</title>

et al. 1995

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Chlorophyll distribution in Haifa Bay was estimated in a period ofveiy high chlorophyll concentrations (up to 70 mg/rn3) using remotely sensed data. Radiometric measurements with spectral resolution of2 urn in the range from 400 to 850 mu, were taken simultaneously with samples for chlorophyll concentration, turbidity and Secchi disk transparency. Prominent features of the reflectance spectra were a wide minimum from 420 to 500 urn, a maximum at 550-570 urn, a minimum at 676 nm and a maximum reflectance showed near 700 nm.High spectral resolution data were used for the selection of the most suitable spectral bands for remote estimating ofchlorophyll concentration. The magnitude and position of the peak near 700 urn were highly correlated with chlorophyll concentration. The reflectance height at 690 nm above the base line from 670 to 850 nm and area above the base line were used as sensitive indicators of chlorophyll concentration. The best model enabled estimation of chlorophyll concentration with an error of less than 4.3 mg/rn3. For the purpose of chlorophyll mapping in Haifa Bay, the use of three relatively narrow spectral bands was sufficient.Radiomethc data were also used to simulate radiances in the channels of TM Landsat and to find the algorithm for chlorophyll assessment. The ratios TM3/TM1 and (TM2-TM3)/TM1 were used and enable chlorophyll estimation with an error ofless than 8 mg/rn3.

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Section: Introductionmentioning

confidence: 99%