کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6358171 | 1315627 | 2014 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Sediment-preserved diatom assemblages can distinguish a petroleum activity signal separately from the nutrient signal of the Mississippi River in coastal Louisiana
ترجمه فارسی عنوان
مجموعه های دیاتومه حفظ شده توسط رسوب می تواند سیگنال فعالیت نفت را به طور جداگانه از سیگنال مواد مغذی رودخانه می سی پی در لوییزیانا ساحلی تشخیص دهد
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کلمات کلیدی
خلیج مکزیک، یوتروفیزیک، فیتوپلانکتون، هیپوکسیا، نشت نفت،
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
اقیانوس شناسی
چکیده انگلیسی
We analyzed the preserved diatom assemblages in dated sediment cores collected from five locations in the Louisiana Bight to test if there was a signature of petroleum extraction activities (hopanes and barium) distinct from the well-documented effects of nutrient loading. The results of a multi-dimensional scaling analysis indicate that the diatom assemblage changes documented throughout the 40Â year record could be explained by three variables: barium and hopanes concentrations, and Mississippi River nitrogen loading. The results of a canonical correspondence analysis demonstrated that these signals could be distinguished through correlations with specific diatom species. The abundance of Actinoptychus senarius, for example, was negatively correlated with barium and the Pseudo-nitzschia delicatissima complex was positively correlated with nitrogen loading. These results provide a “proof-of-concept” demonstration that diatom assemblages preserved in the sediments can be used to study the effects of petroleum extraction activities, and that these 'petroleum signals' may be distinguished from other significant influences such as nutrient loading.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 85, Issue 1, 15 August 2014, Pages 164-171
Journal: Marine Pollution Bulletin - Volume 85, Issue 1, 15 August 2014, Pages 164-171
نویسندگان
M.L. Parsons, R.E. Turner, E.B. Overton,