کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4536183 1626421 2015 10 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
High lipid composition of particulate organic matter in the northern Chukchi Sea, 2011
ترجمه فارسی عنوان
ترکیب چربی بالا مواد معدنی آلی در دریای شمال چوکچی، 2011
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات زمین شناسی
چکیده انگلیسی

We investigated the biochemical compositions (lipids, proteins, and carbohydrates) of particulate organic matter (POM) as a potential food source in the northern Chukchi Sea. We aimed to understand physiological status of phytoplankton, determine important controlling factors, and estimate the energetic contents of POM. The major inorganic nutrients were generally depleted at upper mixed-layer depth (>20 m). The average chlorophyll a (chl-a) concentration was 31.9 mg m−2 (S.D.=±31.3 mg m−2) in this study, significantly higher than that reported previously in the northern Chukchi Sea. Small phytoplankton (0.7–5 µm) accounted for 65.9% of total chl-a concentration. The overall average compositions of lipids, carbohydrates, and proteins were 50% (S.D.=±10.7%), 35% (S.D.=±11.0%), and 15% (S.D.=±11.2%) for POM, respectively. Along with other evidence (e.g., low N:P and protein–carbohydrate ratios), the high lipid and low protein compositions of POM in this study suggests that phytoplankton might have had a nitrogen limitation and/or stationary growth phase in the northern Chukchi Sea during the cruise period, 2011. The overall average calorific content of food material (FM) was 149.2 μg L−1 (S.D.=±36.5 μg L−1) or 1.0 Kcal m−3 (S.D.=±0.2 Kcal m−3). The relatively higher calorific contents in the northern Chukchi Sea were due to high lipid contributions and the considerably high calorific content of FM per POC.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 120, October 2015, Pages 72–81
نویسندگان
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