Investigation of Valasht Lake Trophic State Based on TSI Index

Subject Areas : environmental management

Fatemeh Vahidi ¹ , Rezvan Mousavi Nodushan ² , Seyed Mohammadreza Fatemi ³ , Shahla Jamili ⁴ , Nahid Kham Khaji ⁵

1 - PhD student of Marine Biology, Sciences and Researches Branch, Tehran, Iran. * ( Corresponding Author)
2 - Assistant Professor, Marine Sciences and Technologies Faculty, Sciences and Researches Branch, Tehran, Iran
3 - Assistant Professor, Marine Sciences and Technologies Faculty, Sciences and Researches Branch, Tehran, Iran.
4 - Assistant Professor, Marine Science and Technology Faculty, Sciences and Researches Branch, Tehran, Iran.
5 - - M.Sc. of fisheries, Ghaem-Shahr branch, Islamic Azad University, Tehran, Iran

Received: 2010-09-16 Accepted : 2011-05-11 Published : 2016-11-21

Keywords: Valasht Lake, Turbidity, Trophic state, TSI index,

Abstract :

Background and Objective: In the present study, trophic state of Valasht Lake was investigated monthly at 3 stations, from December 2008 to December 2009. The purpose of this study is investigating the trophic state of the lake and introducing the basic solutions to maintain this valuable ecological resource.  Method: Trophic state index (TSI) was used in this study. Also, the effective parameters on primary production and trophic state determined in this study include: total phosphorus (TP), total nitrogen (TN), a-chlorophyll, Secchi depth (SD), and TN/TP ratio.The results from all mentioned parameters were compared with different trophic levels of fresh water lakes published by U.S Environmental Protection Agency and Organization for Economic Cooperation and Development. According to trophic state index and based on nutrient levels (phosphor and nitrogen), Valasht lake is classified in Mesotrophic to Eutrophic state and based on the other mentioned parameters, it is classified in mesotrophic state. Results: Mean rate of trophic state index reveals the mesotrophic state in this lake. According to the results of Red Field ratio and TSI, nitrogen and turbidity, especially in wet (rainy) seasons, are the main determinative parameters in primary production in Valasht Lake.

References:

1-      Nixon, S & Trent, Z., 2003. Europe’s water: An indicator-based assessment, European environment agency.

2-      Chin, D.A., 2006. Water-quality engineering in natural systems, A John wiley & Sons,ING ., publication, 610pp

3-      Darlin, S., 2007. Water and wastewater caculations manual. Second edition, environmental engineering calculations.

4-      Jorgensen, S. E & Vollenweider, R. A., 1998. Guidelines of lakes management, volume 1, principles of lake management, international lake environment comitte United Nations environment programme.

5-      Rawsen, D., 1939. Some physical and chemical factors in the metabolism of lakes. Am, Assoc, Adv, Sci, Pub, 10:2-26

6-      Davies, B & Day, J., 1998-Vanishing waters.University of cape Town press. Cape Town.

7-      Smith, V. H., Tilman, G.D & Nekola, J. C., 1999. Eutrophication: impacts of excess nutrient inputs on freshwater, marine, and Terrestrial ecosystems. Environmental pollution 100:179-196

8-      Bronmark, C & Hansson, L., 2005. The biology of lakes and ponds. Oxford university press. Oxford.

9-      Kalytyte, D., 2007. Summer phytoplankton in deep Lithuanian lakes, EKOLOGIJA, rol, 53, no. 4. p. 52-58.

10-  Livingston, R., 2006. Restoration of aquatic system, Taylor & Francis.

11-  Carlson, R. E., 1977. A trophic state index for lakes, limnological research center, university of Minnesota, Minneapolis 55455.

12-  Carlson, R. E., 1983. Discussion on usins difference among Carlson’s trophic state index values in regional water quality assessment, by Richard A. Osgood. Water Water Resources Bulletin 19, 307-309.

13-  OECD., 1982. Eutrophication of water. Monitoring assessment and control, OEC Paris.

14-  U. S Environmental protection agency., 1986. Quality criteria for water regulations and standards, EPA 440/5-86-001,Washington, DC.

15-  رحمتی، ر.،1386. بررسی وضعیت تروفی تالاب مرزن آباد، پایان نامه کارشناسی ارشد، دانشگاه آزاد اسلامی، واحد علوم و تحقیقات تهران.

16- ایزدخواستی، زهرا.،1387. مقایسه شاخص‌های فیزیکی، شیمیایی و بیولوژیکی تعیین سطح تروفی در ساحل شهرستان بندرانزلی پایان نامه کارشناسی ارشد، دانشگاه تربیت مدرس - کتابخانه مرکزی

17-  امانی، 1373. مطالعات آبخیزداری حوزه آبخیز دریاچه ولشت، جلد سوم: پوشش گیاهی، مدیریت آبخیزداری سازمان جهاد سازندگی استان مازندران.

18-  محبی تابان، ر. ق.،1372. «موقعیت و تشکیل دریاچه ولشت سماء»، گزارش فرمانداری نوشهر.

19-  Lind, O. T., 1974. Handbook of common methods in limnology. C. V. Mosby, Saint  Louis Missouri

20-  Bain, M. B & Sterenson, N. J., 1999. Aquatic habitat assessment, American Fisheries Society Bethesda, Maryland.

21-  Standard methods for the examination of water and wastewater, 2007. 3th ed. Washington, DC, APHA, ANWA. WPCE.

22-  Edmondson, T. W., 1980. Secchi disk and chlorophyll.Limnol oceanogr, vol. 25, No 2, pp. 378-379

23-  Parson, T. R., Maita.Y & Lalli, C., 1992. A manual of chemical and biological methods for sea water analysis pergman press.

24-  Wetzel, R. G., 2001. Limnology: lake and river Ecosystems Third Edition. Academic Press, San Diego.

25-  Jorgensen, S. E., Loffel, H., Rast, Wand Straskraba, M., 2005. Land and reservoir management, Elsevier, Amsterdam,The Netherlands.

26-  Redfield, A. C., 1958.The  biological control of chemical factors in the environment.Am Sci 46:205-221

27-  Rakoceric, J & Hollert, H., 2005. phytoplankton community and chlorophyll a as Trophic State Indices of lake Skadar, ESPR-Environ Sci and Pollut Res 12(3) 146-152.

28-  Pilkaityte, R & Razinkovas, A., 2007. Seasonal changes in phytoplankton composition and nutrient limitation in a shallow Baltic lagoon. Boreal environment research 12:551-559

29-  Hambright, K.D & Z0hary,T., 2000. Phytoplankton species diversity control through competitive exclusion and physical distur bances. Limnol, Oceanogr 45(1): 110-122

30-  Domingues, R. B., Barbosa, A & Galvao, H. 2005. Nutrients, light and phytoplankton succession in temperate estuary (the Guadiana, south-western Iberia). Estuarine, coastal and shelf science (in press).

31-  رضوی،1373. «موقعیت و تشکیل دریاچه ولشت سماء»، گزارش جهاد سازندگی استان مازندران.

32-  غیاث الحسینی، ح.، 1378. «دریاچه ولشت سماء». پایان نامه کارشناسی ارشد محیط زیست، دانشگاه آزاد اسلامی، دانشکده محیط زیست.

33-  Petrucio, M. M., Barbosa, F. A. R & Furtado, A. L. S., 2006. Bacterioplankton and phytoplankton production in seven lakes in the middle Rio Doce basin, south-east Brazil, J. limno. 5001.

34-  Chattopadhyay, T. & Banerjee. T., 2007. Temporal changes in environmental characteristics and diversity of net phytoplankton in a freshwater lakes,Turk J Bot, 31: 287-296

35-  Art, B., Osumi, K & Nakazono, T., 1999. Identification of phytoplankton and the kelationship between phytoplankton biomass and water quality in kumamoto zoo Basin, Proc. Sch. Agric. Kyushu Tokai univ. 18: 23-33.

36-  Tolotti, M., 2001. Phytoplankton and littoral epilithic diatoms in high mountain lakes of the Adamello-Brenta Regional Park(Trentino, Italy) and their relation to trophic status and acidification risk, limnol ., 6. (2): 171-188.