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Register a new userQualitative and Quantitative study of Crustacean Zooplankton in the Coast Water of Tartous City
دراسة نوعية و كمية للعوالق الحيوانية القشرية في المياه الشاطئية لمدينة طرطوس
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Aِl-Baath University ورقة بحثية
Publication date
2017
fields
Life Science
and research's language is
العربية
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Shamra Editor
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تقدم الدراسة فكرة واضحة عن التنوع الحيوي البحري و الشاطئي للعوالق الحيوانية القشرية و تغيراتها الكمية و النوعية الشهرية و علاقة ذلك مع تغيرات بعض العوامل البيئية الرئيسة مثل درجة الحرارة, الملوحة, تركيز الأوكسجين المنحل, الشفافية, و درجة الحموضة.
This paper Introduces a clear idea about marine and coastal biodiversity of crustacean zooplankton and its quantitative and qualitative monthly variations and its relationship with the changes of some of the main environmental factors such as temperature, salinity,dissolved oxygen, transparency and pH.
References used
Abdel-Aziz N.E., Aboul-Ezz S.M.2003“Zooplankton community of the Egyptian Mediterranean Coast”, Egypt. J. Aquat. Biol. Fish, VOL.7,pp:357-368
Al Arraj L.2017 “Diversity and Copepods’composition of Moroccan Atlantic Coast (Northwest Africa)”, European Scientific Journal, Vol.13, No.18 pp:272-293
Beaugrand, G., Reid, C.P., Ibañez, F., Lindley, A., Edwards, M.2002“Reorganization of North Atlantic Marine Copepod Biodiversity and Climate”, Science. Vol.26,pp. 1692-1694
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Crustacean Zooplankton Was Studied In Five ponds In AL- Sinn's
Fish farm. As a one Of The Most Important components Fresh
Water Ecosystem . The samples of zooplankton were collected
During Period From November 2013 To March 2015, By One
Sampling a Month.
This paper investigates the proximate analysis of zooplankton and the
jellyfish Catostylus perezi through studying the content of proteins, lipids and
carbohydrates (as glucose) in three different stations of Al-Khobar coastal area
(Saudi Arabia)
during four seasons. Physical and chemical factors of water,
specific composition, abundance and biomass of zooplankton were also studied.
The results indicate clear temporal and spatial differences in the content of
organic matter of zooplankton. Proteins values were between 118.8 and 439.7
mg/g and lipids values were between below detection levels and 55.2 mg/g;
whereas carbohydrates values ranged between 0.035 and 0.371 mg/g as dry
weight. The results indicate clear differences in the content of organic matter of
the jellyfish parts especially the medusa.
Half quarterly water samples were collected during the period between March 2015
and February 2016 of four different stations from Banias city water that is subject to the
effect of sewage and estuaries. The concentrations of nutrients (H3SiO4
-,
PO4
-3, NO3
-, NO2
-
, NH4
+ ) and the concentrations of chlorophyll a were determined to find out how affected
by the temporal and spatial variability. The highest concentrations of phosphate and
ammonia ions were observed at station St3 (close to the sewage), while the highest
concentrations of nitrate ions were registered at the stations St1 and St2 (estuaries). The
results showed high values of chlorophyll a in April (due to spring bloom of
phytoplankton) and October (autumn bloom). The ions ratio ΣN/P revealed that
phosphorus ions are limiting factor of the phytoplankton growth at St1 and St2, and that
nitrogen ions are limiting factor of growth at the stations St3 and St4. The ratio Si/ΣN
revealed that silicate ions are limiting factor of the growth of diatoms in all the stations.
Acute toxicity of the pesticide Chlorpyrifos tests were conducted to determine the
Lethal concentration LC50 during 48 hours exposure on three species of fresh water
Zooplankton: Brachionus calyciflorus ( Rotifera), Mesocyclops leuskarti (Copepoda)
and
Daphnia magna ( Cladocera).
• It was found that the species Daphnia magna is the most sensitive to the pesticide
Chlorpyrifos as the value of 48h-LC50=1.28 μg/L, followed by the species Mesocyclops
leuskarti 48h-LC50=28 μg/L while it was observed severe lack of sensitivity of the species
Brachionus calyciflorus to the pesticide 48h-LC50=910 μg/L.
• Depending on the values of the units of toxicity TU has been shown that the
toxicity of the pesticide Chlorpyrifos is from the fourth level = highly toxic (TU = 78.30)
for Daphnia, and Level III = acute toxicity (TU = 3.57) for Mesocyclops, while it is the
first level = non toxic (TU = 0.11) for Brachionus.
• Each increase in the concentration of the pesticide 1.0μg/L lead to increase the
mortality rate in the species studied about: Daphnia magna ، % 68.79 Mesocyclops
leuskarti ، % 0.22 Brachionus calyciflorus % 0.0468
As a result, we can expect that the arrival of the pesticide to aquatic ecosystems will
affect the whole bio-community in these ecosystems and the inter their relationships,
which in turn could be the cause of the disruption of the ecological balance with vague
consequences that are difficult to understand its dimensions.
This research focuses on identifying spatial and temporal variationsof the carbon
dioxide system in the surface seawater of Tartouscityduring the period betweenspring and
summer 2015.In Addition to the extent influenced by some hydrological propert
ies of
water (temperature and salinity) and the impact all of this on the pH of marine water
values.
The results showed low partial pressure of the carbon dioxide in seawaters (PCO2
sea)
in the summercompared with spring, which is reflected on the air-sea flux values (FCO2),
where CO2 released from surface seawater to the air in summer and incontradiction of that
in the spring (0.0632mmol /m²/ day and -0.0715 mmol /m²/day, respectively). In spring,
low temperature and salinity of the water (22.707-22.727C and 37.605-37.765‰
respectively), in addition to increased biological activity contributed in increasing the
absorption of CO2 from the water.These leading to a decrease PCO2
sea (409.0- 429.5μatm)
associated with low concentrations of all of the total inorganic carbon (2229.5-
2242.5μmol/kg) and total alkalinity (2588.873-2590.9μmol/kg). and as a result the surface
sea waters become a reservoir of dioxide carbon atmospheric.
In the summer, the rise in temperature and salinity of surface seawater (28.85-
29.60Cand38.15-38.60‰, respectively) and reduced biological activity all contributed to
the decrease dissolved CO2 values and increase of PCO2
sea(437.5 - 453.5μatm)
associated with increasing concentrations of each of the total inorganic carbon
(2267.9 - 2296.0μmol/kg) and total alkalinity (2739.6 -2741.2μmol/kg).In this way the
surface sea water is source of carbon dioxide to the atmosphere.
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