• الصفحة الرئيسية
  • ارزیابی تغییرات پارامترهای فیزیکوشیمیایی و وضعیت تروفی تالاب بین المللی انزلی بر اساس شاخص کارلسون (TSI )

شارک

عنوان URL للمقالة


رقم المقالة : JEST-1912-4923 (R1) زيارة : 89 الصفحة: 261 - 276

10.30495/jest.2021.49362.4923

نوع المخطوط: ابحاث

ارزیابی تغییرات پارامترهای فیزیکوشیمیایی و وضعیت تروفی تالاب بین المللی انزلی بر اساس شاخص کارلسون (TSI )

الموضوعات :

رباب احمد زاده 1 (دکتری، ارزیابی و آمایش محیط زیست، گروه علوم محیط زیست و جنگل ، دانشکده منابع طبیعی و محیط زیست ، ،واحد علوم و تحقیقات ،دانشگاه آزاد اسلامی، تهران ، ایران.)
محمد دهدار درگاهی 2 (استادیار، گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه آزاد اسلامی واحد لاهیجان، لاهیجان، ایران. *(مسوول مکاتبات))
نعمت ا... خراسانی 3 (استاد، گروه محیط زیست، دانشکده منابع طبیعی، دانشگاه تهران، تهران، ایران.)
فروغ فرساد 4 (استادیار، گروه علوم و مهندسی محیط زیست، دانشکده منابع طبیعی و محیط زیست، دانشگاه آزاد اسلامی واحد علوم و تحقیقات تهران، تهران، ایران.)
محمد رضا رحیمی بشر 5 (استادیار، گروه بیولوژی دریا، دانشکده علوم پایه، دانشگاه آزاد اسلامی واحد لاهیجان، لاهیجان، ایران.)

تاريخ الإرسال : 18 الأحد , ربيع الثاني, 1441 تاريخ التأكيد : 15 الخميس , جمادى الثانية, 1442 تاريخ الإصدار : 18 الأربعاء , جمادى الأولى, 1443

الکلمات المفتاحية: شاخص تروفی, تالاب بین المللی انزلی, کارلسون,

ملخص المقالة :

زمینه و هدف: تالاب بین المللی انزلی مهمترین تالاب حوضه جنوبی دریای کاسپین است و عواملی مانند حجم زیاد ازت و فسفر ورودی، آن را به سمت پرغذایی سوق داده است، هدف اصلی در این مقاله بررسی روند پرغذایی تالاب انزلی و بررسی تغییرات سطح تروفی در فصول و بخشهای مختلف تالاب می باشد .روش بررسی: در این تحقیق طی سال 1397 در 5 ایستگاه به طور فصلی فاکتورهای نیتروژن کل، فسفر کل، عمق دید سکشی و کلروفیل a نمونه برداری و اندازه‌‌گیری شد و با استفاده از شاخص تروفی کارلسون ،سطح تروفی بخشهای مختلف تالاب محاسبه گردید.یافته ها: بر اساس آزمون ANOVA یکطرفه و توکی، میانگین داده های pH از نظر مکانی و فاکتورTN از نظر زمانی دارای تفاوت معنی دار می باشند (05/0 >p). فاکتورTP از نظر زمانی و مکانی، تفاوت معنی داری را نشان نمی دهد. با توجه به نتایج حاصل تمامی بخشهای تالاب انزلی در حالت یوتروف است و بیشترین مقادیر TSI (TN/TP) در بخش مرکزی 49/70 تالاب گزارش شده است که بر اساس شاخص کارلسون و استانداردOECD در مرحله هایپرتروف قرار دارد، با توجه به شاخص تروفی کارلسـون بر اسـاس فسـفر کل(TP) تمامی بخشهای تالاب، در شرایط هایپرتروف قرار گرفته اند که بالاترین مقدار آن در بخش شرقی تالاب 36/93 به ثبت رسیده است و بیشترین مقدار 18 /19 = TN/TP در کل تالاب در فصل تابستان گزارش شده است.بحث و نتیجه گیری : روند پرغذایی تالاب انزلی در سال 1397 مانند گذشته روند رو به رشدی را داشته و در بسیاری از بخشهای تالاب در مرحله نهایی ( هایپرتروف ) قرار دارند. نظارت بر بار ورودی رودخانه ها، ترویج کشاورزی پایدار، جلوگیری از تغییر کاربری زمینها، میتواند از این روند رو به رشد جلوگیری کند.

المصادر:


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  1. Brito A, Newton A, Tett P, Fernandes T. Sedimentwater interactions in a coastal shallow lagoon, Ria Formosa (Portugal): Implications within the Water Framewor Directive. Journal of Environmental Monitoring. 2010; 12: 318-28.
    2.
  2. Pereira P, Botelho MJ, Cabrita MT, Vale C, Moita MT, Gonçalves C. Winter–summer nutrient composition linkage to algae-produced toxins in shellfish at a eutrophic coastal lagoon (Óbidos lagoon, Portugal). Estuarine, Coastal and Shelf Science. 2012; 112: 61-72.
    3.
  3. Pérez-Ruzafa A, Marcos C, Pérez-Ruzafa I, Barcala E, Hegazi M, Quispe J. Detecting changes resulting from human pressure in a naturally quick-changing and heterogeneous environment: spatial and temporal scales of variability in coastal lagoons. Estuarine, Coastal and Shelf Science. 2007; 75(1-2):175-88.
    4.
  4. Bassi N, Kumar MD, Sharma A, Pardha-Saradhi P. Status of wetlands in India: A review of extent, ecosystem benefits, threats and management strategies. Journal of Hydrology: Regional Studies. 2014; 2: 1-19.
    5.
  5. Verhoeven J, Koerselman W, Meuleman A. Nitrogen-or phosphorus-limited growth in herbaceous, wet vegetation: relations with atmospheric inputs and management regimes. Trends in Ecology & Evolution. 1996; 11(12): 494-7.
    6.
  6. Wetzel R. Limnology: Rivers and Lakes. San Diego, CA: Academic Press; 2001.
    7.
  7. Brito AC, Quental T, Coutinho TP, Branco MAC, Falcão M, Newton A, et al. Phytoplankton dynamics in southern Portuguese coastal lagoons during a discontinuous period of 40 years: an overview. Estuarine, Coastal and Shelf Science. 56-110: 147; 2012.
    8.
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  15. Sukumaran P. Aquatic microflora in a perennial tank in Bangalore. Environment and Ecology. 2002; 20(1): 8-12.
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  16. Howarth RW, Marino R. Nitrogen as the limiting nutrient for eutrophication in coastal marine ecosystems: evolving views over three decades. Limnology and Oceanography. 2006; 51 (1part2): 364-76.
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  17. Devlin M, Painting S, Best M. Setting nutrient thresholds to support an ecological assessment based on nutrient enrichment, potential primary production and undesirable disturbance. Marine pollution 2007; 55(1-6):65-73.
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    23.
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    24.
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  25. Carpenter SR, Caraco NF, Correll DL, Howarth RW, Sharpley AN, Smith VH. Nonpoint pollution of surface waters with phosphorus and nitrogen. Ecological applications. 1998; 8(3): 559-68.
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  28. Vollenweider R, Giovanardi F, Montanari G, Rinaldi A. Characterization of the trophic conditions of marine coastal waters with special reference to the NW Adriatic Sea: proposal for a trophic scale, turbidity and generalized water quality index. Environmetrics: The official journal of the International Environmetrics Society. 1998; 9(3): 329-57.
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  37. Acquavita A, Aleffi IF, Benci C, Bettoso N, Crevatin E, Milani L, et al. Annual characterization of the nutrients and trophic state in a Mediterranean coastal lagoon: The Marano and Grado Lagoon (northern Adriatic Sea). Regional Studies in Marine Science. 2015;2:132-44.
    38.
  38. Kumar P, Mahajan AK, Meena NK. Evaluation of trophic status and its limiting factors in the Renuka Lake of Lesser Himalaya, India. Environmental monitoring and assessment. 2019;191(2):105.
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  39. Pełechata A, Pełechaty M, Pukacz A. An attempt to the trophic status assessment of the lakes of Lubuskie Lakeland. Limnological review. 2006;6:239-46.
    40.
  40. Zamani-Ahmadmahmoodi R, Esmaili-Sari A, Mohammadi J, Bakhtiari AR, Savabieasfahani M. Spatial distribution of cadmium and lead in the sediments of the western Anzali wetlands on the coast of the Caspian Sea (Iran). Marine pollution bulletin. 2013;74(1):464-70.
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  44. Abedini A, Mirzajani AR, Fallahi M. Physicochemical state of water and nutrition level of Anzali Wetland. Iranian Fisheries 2017;26(6):113-23. (In Persian)
    45.
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