دراسة أولية للعوالق النباتية للطبقة السطحية لمياه حوض سد وادي غان

Khalil A. Mohammed; Hamed A. Abdulrahim; Mostafa S. Abdulhadi

doi:10.59743/jmset.v4i1.86

Authors

Khalil A. Mohammed Environmental Science Department, Faculty of Science, Azzaytuna University, Tarhouna city, Libya
Hamed A. Abdulrahim Environmental Science Department, Faculty of Science, Azzaytuna University, Tarhouna city, Libya
Mostafa S. Abdulhadi Environmental Science Department, Faculty of Engineering and Technology, Sebha University, Brack city, Libya

DOI:

https://doi.org/10.59743/jmset.v4i1.86

Keywords:

Epilimnion, Diatoms, Green plankton, Bluish green, Physico-chemical factors

Abstract

Phytoplankton plays an important role in aquatic environments as it represents the first product of food cravings and energy on which the rest of the food chains depend on the aquatic community. Some physiochemical factors such as temperature, penetration of light, water movement, and nutrients play an important role in the distribution of plankton and the formation of layers in water basins along with other factors. These factors combine with each other to determine the quality and quality of water as well as living organisms in aquatic communities. In this study, water samples from the surface layer (Epilimnion or Euphotic Zone) were collected from Wadi Gan Water Dam from the end of the winter until the beginning of the summer in order to study the types of phytoplankton found in the laboratory by microscope. Some physiochemical elements were also measured directly in the field, while others were measured by the laboratory method. The results of this study of phytoplankton found in the surface layer of the studied water of the Wadi Gan Water dam during the spring showed the emergence of three common groups during the period of study, including the group of diatoms (Bacillariophyceae), where 8 types of this group were identified, and the group of green algae (Chlorophyceae) has been identified 6 types of them, as for Cyanophyceae (Cyanoprocaryota) group four species were identified and for the Xanthophyceae group only one type of this group was identified. Most algae groups were present in abundance and variety of specimens studied during the end of March, although it was observed that they did not exist at the end of February. This may be due to high levels of dissolved oxygen (9.8 mg/l), high pH (12.06), low water temperature (12 °C), and also low total soluble salts (0.2 g/l). In June, there was a decrease in algal groups except for the group of green algae, which showed a predominant presence of one type, despite the decrease in the concentration of dissolved oxygen (4.1 mg/l and also the pH of 6.2) with the increase in the concentration of phosphorus (0.6 mg/l) and water temperature of 26 °C which may be due to the height of the hardness (90.8 mg/l), which in turn led to the decrease of phytoplankton species during this period as a result of the flow of water to the basin due to rainfall during the beginning of the collection of samples for this study. It can be concluded through this study that the physical and chemical environmental factors and the effect of some human activities have a significant role in the presence, diversity, and species of phytoplankton in this basin.

References

Abrantes N., Antunes S.C., Pereira M.J., and Gonçalves F. (2006). Seasonal succession of cladocerans and phytoplankton and their interactions in a shallow eutrophic lake (Lake Vela, Portugal). Acta Oecologica, 29(1): 54-64.‏

Abujam S.K.S., Paswan G., Dakua S., and Saikia A.K. (2012). Faunal diversity and ecological status of Maijan beel (Wetland). Fishing Chimes, 32(8): 43-48.‏

Barinova S.S., Anissimova O.V., Nevo E., Jarygin M.M., and Wasser S.P. (2004). Diversity and ecology of algae from the Nahal Qishon river. Plant biosystems, 138(3): 245-259.‏

Buzzi F. (2002). Phytoplankton assemblages in two sub-basins of Lake Como. J. of Limnology, 61(1): 117-128.‏

Celekli A. (2006). Net Diatom (Bacillariophyceae) Flora of Lake Gölköy (Bolu). Turkish J. of Botany, 30(5): 359-374.‏

Celekli A., and Külköylüoğlu O. (2007). On the relationship between ecology and phytoplankton composition in a karstic spring (Cepni, Bolu). Ecological Indicators, 7(2): 497-503.‏

Das S.K., and Chakrabarty D. (2007). Limnological survey of three tropical water reservoirs in Eastern India. Acta botánica malacitana, (XXXII): 5-16.‏

Descy J.P., Servais P., Smitz J.S., Billen G., and Everbecq E. (1987). Phytoplankton biomass and production in the River Meuse (Belgium). Water Research, 21(12): 1557-1566.‏

Farahani F., Korehi H., Mollakarami S., Skandari S., Ghasem S., Zafaani G., and Shashm Z.M.C. (2006). Phytoplanktonic diversity and nutrients at the Jajerood River in Iran. Pakistan Journal of Biological Science, 9(9): 1787-1790.

Fathi A.A., Abdelzaher H.M.A., Flower R.J., Ramdani M., and Kraïem, M.M. (2001). Phytoplankton communities of North African wetland lakes: the CASSARINA Project. Aquatic Ecology, 35(3-4): 303-318.‏

Finlay J.C., Khandwala S., and Power M.E. (2002). Spatial scales of carbon flow in a river food web. Ecology, 83(7): 1845-1859.‏

Fisher S.G., and Grimm N.B. (1991). Streams and disturbance: Are cross-ecosystem comparison usful? In Comparative Analysis of Ecosystems. Patterns, Mechanisms and the ories (Cole J., Lovett G., and Findaly S., Eds.), pp.: 196-221, Springer-Verlag, New York.

Huisman J., Matthijis H.C.P., and Visser P.M. (2005). Harmful Cyanobacteria. Aquatic Ecology Series, Series Vol.: 3, Springer, Netherlands.

Ilja K.R.N.O., Šporka F., Štefkova E., Tirjakova E., Bitusik P., Bulankova E., Lukas J., Illesova D., Derka T., Tomajka T., and Èerny J. (2006). Ecological study of a high-mountain stream ecosystem (Hincov potok, High Tatra Mountains, Slovakia). Acta Soc. Zool. Bohem, 69: 299-316.‏

Ishida N., Mitamura O., and Nakayama M. (2006). Seasonal variation in biomass and photosynthetic activity of epilithic algae on a rock at the upper littoral area in the north basin of Lake Biwa, Japan. Limnology, 7(3): 175-183.‏

Komarek J., and Jankovska V. (2002). Review of the Green Algal Genus Pediastrum; Implication for pollaen-analytical Research. Bibliotheca Phycologica. Cramer J. Berlin-Stuttgart, 108: 127-128.

Lange-Bertalot H., and Metzeltin D. (1996). Ecology–Diversity–Taxonomy. Indicators of oligotrophy–800 taxa representative of three ecologically distinct lake types. Iconographia Diatomologica, 2(1): 1-390.‏

Lindstrom E.A., Johansen S.W., and Saloranta T. (2004). Periphyton in running waters—long-term studies of natural variation. In The Atna River: Studies in an Alpine—Boreal Watershed, pp.: 63-86, Springer, Dordrecht.‏

Minshall G.W. (1978). Autotrophy in stream ecosystems. BioScience, 28(12): 767-771.‏

Munn M.D., Black R.W., and Gruber S.J. (2002). Response of benthic algae to environmental gradients in an agriculturally dominated landscape. Journal of the North American Benthological Society, 21(2): 221-237.‏

Nicholls K. (1997). Planktonic green algae in western Lake Erie: the importance of temporal scale in the interpretation of change. Freshwater Biology, 38(2): 419-425.‏

Orsini L., Sarno D., Procaccini G., Poletti R., Dahlmann J., and Montresor M. (2002). Toxic Pseudo-nitzschia multistriata (Bacillariophyceae) from the Gulf of Naples: morphology, toxin analysis and phylogenetic relationships with other Pseudo-nitzschia species. European Journal of Phycology, 37(2): 247-257.‏

Peterson C.G. (1996). Response of benthic algal communities to natural physical disturbance. Algal Ecology, 375-402.‏

Potapova M., and Charles D.F. (2003). Distribution of benthic diatoms in US rivers in relation to conductivity and ionic composition. Freshwater Biology, 48(8): 1311-1328.‏

Reynolds C.S. (1980). Phytoplankton assemblages and their periodicity in stratifying lake systems. Ecography, 3(3): 141-159.‏

Rimet F., Druart J.C., and Anneville O. (2009). Exploring the dynamics of plankton diatom communities in Lake Geneva using emergent self-organizing maps (1974–2007). Ecological Informatics, 4(2): 99-110.‏

Robarts R.D., and Zohary T. (1987). Temperature effects on photosynthetic capacity, respiration, and growth rates of bloom-forming cyanobacteria. New Zealand Journal of Marine and Freshwater Research, 21(3): 391-399.‏

Round F.E. (2002). The Biology of Algae, 2nd. ed., Edward Arnold, London.

Sitkowska M. (1992). Taksony rodzaju Pediastrum Meyen wystepujace w stawach Lodzi i okolic. Acta Universitatis Lodziensis. Folia Botanica, 9: 47-104.‏

Stevenson R.J., and Smol J.P. (2003). Use of Algae in Environmental Assessments. In Freshwater Algae of North America: Ecology and Classification, pp. 775-804. Elsevier Inc.

Subyani A.M. (2005). Hydrochemical identification and salinity problem of ground-water in Wadi Yalamlam basin, Western Saudi Arabia. Journal of Arid Environments, 60(1): 53-66.‏