کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6383991 | 1626418 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Macromolecular compositions of phytoplankton in the Amundsen Sea, Antarctica
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
علوم زمین و سیارات
زمین شناسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Macromolecular compositions of phytoplankton in the Amundsen Sea, Antarctica Macromolecular compositions of phytoplankton in the Amundsen Sea, Antarctica](/preview/png/6383991.png)
چکیده انگلیسی
The biochemical compositions (proteins, carbohydrates, and lipids) of phytoplankton provide useful information for their environmental growth conditions and nutritional status as a basic food source for upper trophic consumers. Concentrations of these compositions were assessed at 100, 30, and 1% light penetration depths within the euphotic zone in the Amundsen Sea, Antarctica, using colorimetric techniques. The major inorganic nutrients were generally abundant throughout the study area. The average chlorophyll a (chl-a) concentration was 49.2 mg mâ2 (S.D.=±27.6 mg mâ2) and large phytoplankton (>20 µm) accounted for 64.1% of the total chl-a concentration. The biochemical compositions of the phytoplankton were not significantly different among different light depths or productivity stations. The overall compositions of proteins, carbohydrates, and lipids from all stations averaged 65.9% (S.D.=±12.5%), 22.4% (S.D.=±10.9%), and 11.7% (S.D.=±6.5%), respectively. Regardless of dominant phytoplankton species, nitrogen-abundant conditions sustained high protein compositions of phytoplankton in the Amundsen Sea during the cruise period. Based on the macromolecular compositions, the average food material (FM) concentration was 219.4 μg Lâ1 (S.D.=±151.1 μg Lâ1) and correlated positively with the primary productivity in the Amundsen Sea. High protein/carbohydrate ratios (>1) and large proportions of proteins suggest that phytoplankton provide nitrogen-sufficient foods to higher trophic consumers through a higher efficiency of protein carbon incorporated into herbivores.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 123, January 2016, Pages 42-49
Journal: Deep Sea Research Part II: Topical Studies in Oceanography - Volume 123, January 2016, Pages 42-49
نویسندگان
Bo Kyung Kim, Jang Han Lee, HuiTae Joo, Ho Jung Song, Eun Jin Yang, Sang Hoon Lee, Sang H. Lee,