کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4540656 1326682 2011 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Nitrogen uptake and primary productivity rates in the Mid-Atlantic Bight (MAB)
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
پیش نمایش صفحه اول مقاله
Nitrogen uptake and primary productivity rates in the Mid-Atlantic Bight (MAB)
چکیده انگلیسی

Nutrient concentrations, primary productivity, and nitrogen uptake rates were measured in coastal waters of the Mid-Atlantic Bight over a two-year period that included measurements from all four seasons. In order to assess carbon productivity and nitrogen demand within the context of the physical environment, the region was divided into three distinct hydrographic regimes: the Chesapeake and Delaware Bay outflow plumes (PL), the southern Mid-Atlantic shelf influenced by the Gulf Stream (SS), and the mid-shelf area to the north of the Chesapeake Bay mouth (MS). Annual areal rates of total nitrogen (N) uptake were similar across all regions (10.9 ± 2.1 mol N m−2 y−1). However, annual areal rates of net primary productivity were higher in the outflow plume region (43 mol C m−2 y−1), than along the Mid-Atlantic shelf and in areas influenced by the Gulf Stream (41 and 34 mol C m−2 y−1, respectively). Rates of net primary productivity were not well correlated with Chl a concentrations and were uncoupled with net N uptake rates. Seasonally averaged annual areal rates of net primary productivity for the Mid-Atlantic Bight measured in this study were higher than those calculated in previous decades and provide important validation information for biogeochemical models and satellite remote sensing algorithms developed for the region.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Estuarine, Coastal and Shelf Science - Volume 91, Issue 1, 1 January 2011, Pages 13–23
نویسندگان
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