کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5758094 | 1622818 | 2017 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Nutrient dynamics of northern Bay of Bengal (nBoB)-Emphasizing the role of tides
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The variability of nutrient concentrations (dissolved inorganic nitrogen, DIN; dissolved inorganic phosphorus, DIP; and dissolved inorganic silicate, DSi) along with salinity, total suspended matter (TSM), chlorophyll-a (chl-a) and dissolved oxygen (DO) were investigated in the shallow continental shelf waters of the northern Bay of Bengal. The sampling was conducted during the high tide and low tide conditions (day time) of the spring and neap phases throughout two annual cycles (February, 2013 to January, 2015). All analyses were carried out to evaluate the hypothesis-tidal processes principally regulate the nutrient variability in short-term scale. Results portrayed that DIN, DIP and DSi concentrations varied significantly between spring and neap phases as well as between high and low tides (p<0.05). Short-term spring-neap and high tide-low tide contrast was most prominent in pre-monsoon and post-monsoon season. Considering the entire dataset, DIN, DSi and DIP concentrations were 8.83±3.45mg lâ1, 8.43±3.32mg lâ1 and 0.61±0.36mg lâ1 during the spring phase and 9.79±3.61mg lâ1, 9.24±3.19mg lâ1 and 0.73±0.41mg lâ1 during the neap phase respectively. TSM exhibited strongest positive correlation with DIN and DSi (R2=0.9) followed by a strong negative correlation with salinity (R2=0.7), however, DIP showed a moderate correlation with both salinity and TSM. Salinity and TSM being a proxy of tidal variability, significant correlation between these two parameters and nutrient concentrations enabled the proposed hypothesis to be accepted. Moreover, this region exhibited low abundance of chl-a (â¼0.1 to 3.5 mgmâ3 throughout the study period) though nutrient values were quite high, as this region was phosphate limited in the post-monsoon, and for the rest of the year it was light limited.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Regional Studies in Marine Science - Volume 10, February 2017, Pages 116-134
Journal: Regional Studies in Marine Science - Volume 10, February 2017, Pages 116-134
نویسندگان
Sourav Das, Sandip Giri, Isha Das, Abhra Chanda, Amit Ghosh, Anirban Mukhopadhyay, Anirban Akhand, S.B. Choudhury, V.K. Dadhwal, Sourav Maity, T. Srinivasa Kumar, Aneesh A. Lotliker, D. Mitra, Sugata Hazra,