Concentration of Chlorophyll-a in Coastal Waters of Rudsar

Jamshidi, Siamak; Bakar, M. N. B. Abu; Yousefi, Mohammad Reza

doi:10.3923/rjes.2010.383.391

Cited by 7 publications

(4 citation statements)

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“…1) in summer 2008, the amounts of the chlorophyll-a concentrations varied from 3.8 to 0.1 mg m −3 with the maximal levels at 15 m depth. In addition, chlorophyll-a concentration sharply decreased with depth and reached around 0.5 mg m −3 and 0.1 mg m −3 at 60 m and below 80 m depths, respectively (Jamshidi et al, 2010). Therefore, it is found that the largest concentrations of chlorophyll-a in the study area were limited to the upper layers including the surface mixed layer and thermocline (around 50 m surface layers).…”

Section: Discussionmentioning

confidence: 73%

A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea

Jamshidi

Bakar

2011

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Abstract. Phytoplankton as chlorophyll-containing organisms is the first step of production in most marine processes and food chains. Nutrient enhancement in the seawater due to the discharge of agricultural, industrial, and urban wastes threatens the Caspian Sea environment. Increasing concentrations of chlorophyll-a in seawater, in reaction to the elevation of nutrient supply can have severely damaging effects on the marine environment of the Caspian. In this research, seasonal variability of the chlorophyll-a concentrations in the western part of the southern coastal waters of the Caspian Sea near Iranian coast was examined using field observations. The data showed that the most chlorophyll-a was found below the sea surface. The thermal stratification in water column and outflow of the Anzali Lagoon affect the chlorophyll-a concentrations in the region. Concentrations of chlorophyll-a were recorded in midsummer in a range of 0.2–3.4 mg m−3.

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Section: Discussionmentioning

confidence: 73%

A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea

Jamshidi

Bakar

2011

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“…The highest temperature occurs around 13:00. The dynamics of air temperature and water temperature show thermal interactions in the upper layers of seawater [22,26,27]. The range of daily air temperature changes of natural growth of lahe is 25 -31.6 0 C, slightly higher than the ideal air temperature range for the growth of caulerpa lentillifera, which is 25 -30 0 C [28].…”

Section: Resultsmentioning

confidence: 99%

Comparative Analysis of The Two Sites of Lahe (Caulerpa sp.) Growth for Determine The Range of Atmospheric, Physical and Chemical Water Conditions

Medellu

Suriani

Komansilan

2020

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Background Ecological conditions determine the growth and productivity of lahe (Caulerpa Sp.). We conduct a comparative study of ecological conditions that affected differences in growth and productivity of lahe in two locations, in the Batunderang village area and the Lapango village area, Sangihe Regency. The ecological factors that we examined include atmospheric, chemical and physical factors. Atmospheric variables include radiation intensity, duration of irradiation, the air temperature above sea level. The physical and chemical parameters of water studied include current velocity, seawater temperature, salinity, current strength, pH, dissolved oxygen, and nitrate concentrations. Results The indicator of lahe growth are: chain length, stem diameter, meristem diameter. The productivity indicator is the wet weight of the lahe harvested by farmers within 90 days. Comparative analysis between locations and measurement positions summarizes the range of ecological conditions for natural growth. The seabed for lahe is 0.8 m − 1.4 m lower than the surface of a coral reef and is not exposed at the lowest tide. The air temperature range at position 20 cm above sea level is 250C − 31.60C, while the temperature of seawater varies between 250C to 28.40C. Daily fluctuations in current velocity at high tides range from 0.09 cm/sec to 2 cm/sec. The salinity range between 27.8 ppt to 28.6 ppt. The pH range of seawater for natural growth is 7.6–8.12, while the dissolved oxygen range is 6 ppm to 6.25 ppm. Nitrate concentrations in lahe growth positions vary between 1.8 ppm − 1.96 ppm. Conclusion This ecological condition guarantees that the productivity of lahe varies between 20–30 kg/m2 for a 90-day harvest period.

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“…The concentration of chlorophyll a measured in this research is the same range of chlorophyll a concentrations at the surface seawater as in the previous study. 33,34 The variability of chlorophyll a-enriched reflected the good ecological conditions of marine systems in the Gulf of Prigi and such variability was possibly affected by the changes in the physical and chemical characteristics of the marine environment, such as terrestrial runoff, mass corals bleaching, temperature, wind stress and the Indian Ocean Dipole (IOD). Seasonal and inter-annual variability of phytoplankton biomass in the eastern part of the gulf, which is influenced by mixing of fresh water discharges (estuary) with Indian Ocean, may also contribute to the high distribution of chlorophyll a concentrations in the Gulf of Prigi.…”

Section: Resultsmentioning

confidence: 99%

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

Wijaya¹,

Semedi²,

Lusiana³

et al. 2018

J. Braz. Chem. Soc.

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In order to investigate the anthropogenic and natural sources of metals in the Gulf of Prigi, Indonesia, it was analyzed their metal contents and Pb isotopes of surface seawater together with sediment, grouper fish, mosh, seaweed, soil, and sharp grass for protecting the environmental pollution of the study area. Samples were leached using a microwave digestion technique. Metal (Ca, Fe, Mn, Cu and Pb) concentrations and 206 Pb, 207 Pb and 208 Pb in the leached solutions were analyzed using inductively coupled plasma-mass spectrometry (ICP-MS). The level concentrations of Ca (491436 μg kg-1), Fe (12123 μg kg-1), Mn (37.2 μg kg-1), Cu (84.0 μg kg-1) and Pb (34.5 μg kg-1) in the surface seawater were low compared with those of background seawater levels issued by World Health Organization (WHO). The range of Pb isotope ratios (207 Pb / 206 Pb = 0.7966-0.9945 and 208 Pb / 206 Pb = 2.2600-2.8243) in surface seawater was higher in the plotted Pb growth curve suggesting unpolluted Pb reflected by natural sources such as mineral sources or lithogenic from marine sediment.

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Concentration of Chlorophyll-a in Coastal Waters of Rudsar

Cited by 7 publications

References 5 publications

A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea

A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea

Comparative Analysis of The Two Sites of Lahe (Caulerpa sp.) Growth for Determine The Range of Atmospheric, Physical and Chemical Water Conditions

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

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Concentration of Chlorophyll-a in Coastal Waters of Rudsar

Cited by 7 publications

References 5 publications

A study on distribution of chlorophyll-&lt;I&gt;a&lt;/I&gt; in the coastal waters of Anzali Port, south Caspian Sea

A study on distribution of chlorophyll-&lt;I&gt;a&lt;/I&gt; in the coastal waters of Anzali Port, south Caspian Sea

Comparative Analysis of The Two Sites of Lahe (Caulerpa sp.) Growth for Determine The Range of Atmospheric, Physical and Chemical Water Conditions

Metal Contents and Pb Isotopes in the Surface Seawater of the Gulf of Prigi, Indonesia: Detection of Anthropogenic and Natural Sources

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A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea

A study on distribution of chlorophyll-<I>a</I> in the coastal waters of Anzali Port, south Caspian Sea