کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
11028625 1646760 2018 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Mercury assessment, macrobenthos diversity and environmental quality conditions in the Salado Estuary (Gulf of Guayaquil, Ecuador) impacted by anthropogenic influences
ترجمه فارسی عنوان
ارزیابی جیوه، تنوع ماک بنتس و شرایط کیفیت محیط زیست در رودخانه سالادو (خلیج گویاکیل، اکوادور) تحت تأثیر تاثیرات انسانی
کلمات کلیدی
ارزیابی زیست محیطی، غلظت فلزات، ماکروبنتوز، رودخانه سالادو، اکوادور،
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات اقیانوس شناسی
چکیده انگلیسی
Water and sediment quality, macrobenthos diversity and mercury levels were assessed in the Salado Estuary, Gulf of Guayaquil (Ecuador) during 2008, 2009 and 2014. Severe hypoxia, anoxia and large fluctuations of salinity occurred in an impacted sector within Guayaquil city relative to a mangrove area within the Salado Mangroves Faunal Production Reserve. Significant inter-site and temporal differences were observed for dissolved oxygen, salinity, total dissolved solids, percentage of silts and clays, and species diversity. Macrobenthos' species richness for both sectors was greater during 2008. Sediments revealed high concentrations of total mercury (THg) (1.20-2.76 mg kg−1 dw), exceeding Ecuador's SQG (0.1 mg kg−1 dw). Sediment THg were significantly lower in 2014 than 2008/09. Biota sediment sccumulation factor values for mussels (3.0 to 34), indicate high bioaccumulation potential from mercury-contaminated sediments. This work highlights the need to develop stronger environmental policies to protect the Salado Estuary from anthropogenic stressors.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Marine Pollution Bulletin - Volume 136, November 2018, Pages 365-373
نویسندگان
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