[صفحه اصلی ]   [Archive]  
:: صفحه اصلي :: درباره نشريه :: آخرين شماره :: تمام شماره‌ها :: جستجو :: ثبت نام :: ارسال مقاله :: تماس با ما ::
:: دوره 20، شماره 4 - ( 1400 ) ::
جلد 20 شماره 4 صفحات 945-960 برگشت به فهرست نسخه ها
Research Article: Diatom community structure along physico-chemical gradients in Southern Caspian Sea (Noor shore)
چکیده:   (289 مشاهده)
Diatom species diversity and cell abundance are influenced by environmental factors. The effect of physico-chemical factors on interseasonal dynamics of planktonic diatom community structure was examined along Noor shore of Caspian Sea to determine which of the variables impact more on the diatom diversity, distribution and cell number. Overall, 144 samples were collected during four sampling campaigns along four transects of 2 km long each with three sampling sites in 2014 (February, May, July and November). In total, 62 diatom species were identified, of which 27 species were typical marine or brackish-water and the rest were marine-freshwater or freshwater. In the present study, diatom species diversity was highest in winter. As a result, Shannon-Wiener Index was 3.5 in winter, while in spring it was reduced to 0.8. Among the revealed species, the centric Thalassiosira caspica was the most abundant (up to 2.75×106 cells L-1). Comparison of species and their abundances between coastal, middle and offshore stations, as well as all stations as a whole, showed that they differed (Test χ 2, p<0.05) except for Navicula sp. (in summer) and Ulnaria ulna (in autumn and winter). Canonical correspondence analysis results showed that in particular temperature and salinity, in the second place transparency, phosphates and to a lesser extent dissolved oxygen and pH can affect diatom species diversity and abundance. Diatoms Thalassiosira fasciculata, T. caspica and Melosira caspica may be recommended as biological indicators along the shore of Caspian Sea.
متن کامل [PDF 828 kb]   (118 دریافت)    
نوع مطالعه: پژوهشي | موضوع مقاله: Ecology
دریافت: 1398/10/2 | پذیرش: 1398/12/24 | انتشار: 1400/4/28
ارسال نظر درباره این مقاله
نام کاربری یا پست الکترونیک شما:

CAPTCHA


XML   English Abstract   Print


Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:

Zarei Darki B, Bigham S, Patimar R. Research Article: Diatom community structure along physico-chemical gradients in Southern Caspian Sea (Noor shore). IJFS. 2021; 20 (4) :945-960
URL: http://jifro.ir/article-1-4163-fa.html

Research Article: Diatom community structure along physico-chemical gradients in Southern Caspian Sea (Noor shore). مجله علوم شیلاتی ایران. 1400; 20 (4) :945-960

URL: http://jifro.ir/article-1-4163-fa.html



بازنشر اطلاعات
Creative Commons License این مقاله تحت شرایط Creative Commons Attribution-NonCommercial 4.0 International License قابل بازنشر است.
دوره 20، شماره 4 - ( 1400 ) برگشت به فهرست نسخه ها
Iranian Journal of Fisheries Sciences Iranian Journal of Fisheries Sciences
Persian site map - English site map - Created in 0.04 seconds with 30 queries by YEKTAWEB 4331