UPTAKE OF NITRATE AND AMMONIA IN THE SUB-ARCTIC BOUNDARY AND ADJACENT REGIONS OF THE NORTHWESTERN PACIFIC-OCEAN

被引：8

作者：

SHIOMOTO, A ^{[1
]}

MAITA, Y ^{[1
]}

机构：

[1] HOKKAIDO UNIV,FAC FISHERIES,NO PACIFIC FISHERIES RES INST,DIV MARINE BIOCHEM SCI,HAKODATE 041,JAPAN

来源：

DEEP-SEA RESEARCH PART A-OCEANOGRAPHIC RESEARCH PAPERS | 1990年 / 37卷 / 12期

关键词：

D O I：

10.1016/0198-0149(90)90084-9

中图分类号：

P7 [海洋学];

学科分类号：

0707 ;

摘要：

Nitrate and ammonia uptake rates were measured in summer at several stations in subarctic, subtropical and transitional regions of the North Pacific Ocean. Nitrate uptake rates (rho-NO3) and activity (rho-NO3/Chl a) were higher in subarctic and transitional regions than in the subtropical region. Ammonia uptake rates (rho-NH4) showed no remarkable regional pattern. Highest values of ammonia uptake activity (rho-NH4/Chl a) were observed in the subtropical region; values in the other areas were consistently lower. Nitrate was an equally important nitrogen source in subarctic and transitional regions, while ammonia was the main source in the subtropical region. In addition, data indicate that nitrogen uptake in the transitional region was more efficient than in the other regions. It is suggested that higher light intensity and temperature induced the higher degree of efficiency.

引用

页码：1887 / 1897

页数：11

共 47 条

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