ارزیابی اکولوژیکی تالاب رودبست با استفاده از شاخص‌های زیستی جلبکی

نویسندگان

گروه علوم گیاهی، دانشکده علوم پایه، دانشگاه مازندران، بابلسر، ایران

چکیده
تالاب رودبست در شهرستان بابلسر یکی از منابع تأمین‌کننده آب‌های کشاورزی و پناهگاه موجودات زنده در حاشیه سکونتگاه‌های انسانی است. حفظ کیفیت مطلوب این زیستگاه هم ازنظر محیط‌زیست طبیعی و هم انسانی حائز اهمیت است. ازاین‌رو این پژوهش به بررسی اکولوژیکی تالاب رودبست با استفاده از با استفاده از شاخص‌های زیستی جلبکی می پردازد. برای این منظور در فصول مختلف سال نمونه‌برداری انجام شد. نمونه های جمع آوری شده، تثبیت و به کمک میکروسکپ نوری و منابع کتابخانه شناسایی شد. برای بررسی سطح آلودگی از شاخص پالمر و شاخص‌های تنوع زیستی مختلف استفاده شد. 81 جنس متعلق به 7 شاخه جلبکی شناسایی شد. شاخه جلبک‌های سبز دارای بیشترین جنس‌های جلبکی و شاخه Chrysophyta دارای کمترین جنس‌های جلبکی می‌باشند. بیشترین فراوانی جلبکی در فصل تابستان و بهار بوده است. شاخه Chlorophyta و Bacillariophyta در بیشتر فصل‌های سال جلبک‌های غالب بوده‌اند. شاخص آلودگی پالمر ایستگاه‌های 3 و 4 در فصل تابستان با شاخص عددی 35 بیشترین مقدار و ایستگاه 2، 4 و 5 در فصل زمستان به ترتیب با داشتن شاخص عددی 6، 9 و 7 فاقد آلودگی یا آلودگی اندک بوده‌اند. در فصول تابستان و پاییز در تمامی ایستگاه‌ها شاخص عددی پالمر بزرگ‌تر از 24 را نشان دادند. علت اصلی آلودگی تالاب در فصل بهار ورود شاخه‌های فرعی بابلرود،که حاوی فاضلاب روستاها و پساب­های کشاورزی است، می­باشد. علل افزایش آلودگی در فصل تابستان و پاییز را نیز می‌توان بالا بودن دمای آب، کاهش بارندگی در فصل تابستان و پاییز، افزایش برداشت آب تالاب برای کشت دوباره برنج در تابستان دانست.

کلیدواژه‌ها


عنوان مقاله English

Ecological Assessment of Roodbest Wetland Using Algal Bioindicators

نویسندگان English

Naser Jafari
Zahra Pournasrollah
Soghra Ramzi
Department of Plant Biology, Faculty of basic Science, University of Mazandaran, Babolsar, Iran
چکیده English

The Roodbast Wetland in Babolsar city is a crucial source of agricultural water and supports various living organisms near human settlements. Preserving the quality of this habitat is vital for both natural and human reasons. This study investigates the ecological status of Roodbast Wetland using algae as biological indicators of pollution. Diverse samplings were conducted in different seasons. Pollution levels were assessed using the Palmer index and various biological indicators. The study cataloged 81 genera across 7 phyla of algae. Chlorophyta had the highest species diversity, while Chrysophyta had the fewest. Peak algae proliferation occurred in summer and spring. Chlorophyta and Bacillariophyta were predominant throughout most of the year. In summer, Palmer’s pollution index peaked at stations 3 and 4, with a value of 35. In winter, stations 2, 4, and 5 showed minimal pollution with indices of 6, 9, and 7, respectively. During summer and autumn, all stations recorded Palmer indices exceeding 24. The primary cause of wetland pollution in spring is the influx of sub-branches from Babolrood, carrying village sewage and agricultural runoff. The rise in pollution in summer and autumn is due to elevated water temperatures, reduced rainfall, and increased extraction of lagoon water for rice replanting.

کلیدواژه‌ها English

biodiversity
Palmer’s Algal Pollution Index
Pollution
Mazandaran
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  • تاریخ دریافت 18 خرداد 1405
  • تاریخ انتشار 18 خرداد 1405