کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7482764 | 1485262 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Groundwater nitrogen processing in Northern Gulf of Mexico restored marshes
ترجمه فارسی عنوان
پردازش نیتروژن آب زیرزمینی در خلیج مکزیک مرجان را ترمیم کرد
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی انرژی
انرژی های تجدید پذیر، توسعه پایدار و محیط زیست
چکیده انگلیسی
Groundwater nitrogen processing was examined in a restored black needlerush (Juncus roemerianus) marsh to assess its potential for removing land-derived nitrogen pollution. Two restoration designs, one initially planted at 50% cover (half density plots) and the other one at 100% cover (full density plots), were compared with non-vegetated controls. The introduction via groundwater of a NO3â solution with a conservative tracer (Brâ) and labeled isotopically (15N) allowed calculation of nitrogen removal in the plots following two methods. The first method used changes in the ratio [NOx]:[Brâ] as the groundwater plume traveled through the plot, and the second method relied on balancing 15N input with 15N export. Both methods showed â97% of the N from the simulated groundwater plume was removed (i.e. not delivered to the open waters of the adjacent estuary) in vegetated plots and â86% was removed in non-vegetated controls. The most dominant routes of N removal from the introduced solution were N2 production and assimilation into macrophyte biomass, which were similar in magnitude for the vegetated plots, whereas N2 production dominated in the unvegetated plots. The majority of N removed from the introduced solution occurred in the first 30Â cm the solution traveled in the vegetated treatments. In addition, ambient porewater concentrations of dissolved inorganic nitrogen (DIN) were similar between full and half density plots, but lower than the non-vegetated control (â8.5Ã and 7.5Ã), suggesting full and half density plots removed more DIN than non-vegetated plots. These results suggest that restoring marshes by planting 50% of the area may be a more cost-effective restoration design in terms of mitigating land-derived nutrient pollution than planting 100% of the area since it requires less effort and cost while removing similar quantities of N.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Environmental Management - Volume 150, 1 March 2015, Pages 206-215
Journal: Journal of Environmental Management - Volume 150, 1 March 2015, Pages 206-215
نویسندگان
Eric L. Sparks, Just Cebrian, Craig R. Tobias, Christopher A. May,