Time series of seasonal variation of primary productivity at station KNOT (44°N, 155°E) in the sub-arctic western North Pacific

被引:90
作者
Imai, K
Nojiri, Y
Tsurushima, N
Saino, T
机构
[1] Natl Inst Environm Studies, Global Warming Mech Res Project, Tsukuba, Ibaraki 3058506, Japan
[2] Japan Sci & Technol Corp, Kawaguchi, Saitama 3320012, Japan
[3] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058569, Japan
[4] Nagoya Univ, Inst Hydrospher Atmospher Sci, Chikusa Ku, Nagoya, Aichi 4648601, Japan
关键词
D O I
10.1016/S0967-0645(02)00198-4
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Phytoplankton biomass and primary productivity were measured as a part of the station KNOT (44degreesN, 155degreesE) time-series observation program in the western North Pacific, which began in June 1998 and continued on a nearly monthly basis until February 2000. Primary productivity was measured by the, C-13 uptake method using a clean sampling technique. The surface temperature changed from 2degreesC to 15degreesC, and the minimum and maximum temperatures were in February and August, respectively. The minimum and maximum concentrations of surface-layer nutrients were 2.2 and 19.6 muM for nitrate + nitrite, 0.32 and 1.64 muM for phosphate, and 3.3 and 33.3 muM for silicate. The averaged depth of euphotic zone was about 50 m, which did not show clear seasonality. Integrated chlorophyll a in the euphotic zone ranged between 20 and 40 mg Chl a m(-2), except for the high values (51-64 mg Chl a m(-2)) in early June and middle October 1998 and May 1999, and the low value (17 mg Chl a m(-2)) in late June 1998. The integrated primary productivities in the upper part of the euphotic zone for spring (May), summer (June-August), autumn (October-November), and winter (December-February) were 517-535 (av. 526), 153-304 (av. 227), 101-307 (av. 173), and 25-121 (av. 48) mg cm(-2) d(-1), respectively. The annual productivity was estimated to be 90 g cm(-2) yr(-1). The results showed that primary productivity had a distinct seasonal variation, with a 10-fold range during winter-spring, which is far larger than that at Ocean Station Papa (OSP) in the eastern North Pacific. However, the annual productivity at station KNOT was lower than the at OSP. It was found that the light utilization index was constant during all seasons, and the annual average (+/-1 SD) was 0.30 +/- 0.10 g C (g Chl a)(-1) m(2) (molquanta)(-1). (C) 2002 Elsevier Science Ltd. All rights reserved.
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页码:5395 / 5408
页数:14
相关论文
共 48 条
[1]  
ANDERSON GC, 1972, BIOL OCEANOGRAPHY NO, P245
[2]  
[Anonymous], BIOGEOCHEMICAL PROCE
[3]   SPRING AND SUMMER GROWTH-RATES OF SUBARCTIC PACIFIC PHYTOPLANKTON ASSEMBLAGES DETERMINED FROM CARBON UPTAKE AND CELL VOLUMES ESTIMATED USING EPIFLUORESCENCE MICROSCOPY [J].
BOOTH, BC ;
LEWIN, J ;
LORENZEN, CJ .
MARINE BIOLOGY, 1988, 98 (02) :287-298
[4]   Phytoplankton dynamics in the NE subarctic Pacific [J].
Boyd, P ;
Harrison, PJ .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1999, 46 (11-12) :2405-2432
[5]  
FALKOWSKI P G, 1981, Journal of Plankton Research, V3, P203, DOI 10.1093/plankt/3.2.203
[6]  
Falkowski P. G., 2013, Aquatic photosynthesis
[7]   METAL CONTAMINATION AND ITS EFFECT ON PRIMARY PRODUCTION MEASUREMENTS [J].
FITZWATER, SE ;
KNAUER, GA ;
MARTIN, JH .
LIMNOLOGY AND OCEANOGRAPHY, 1982, 27 (03) :544-551
[8]   MEASUREMENT OF PHOTOSYNTHETIC PRODUCTION OF A MARINE-PHYTOPLANKTON POPULATION USING A STABLE C-13 ISOTOPE [J].
HAMA, T ;
MIYAZAKI, T ;
OGAWA, Y ;
IWAKUMA, T ;
TAKAHASHI, M ;
OTSUKI, A ;
ICHIMURA, S .
MARINE BIOLOGY, 1983, 73 (01) :31-36
[9]   Comparison of factors controlling phytoplankton productivity in the NE and NW subarctic Pacific gyres [J].
Harrison, PJ ;
Boyd, PW ;
Varela, DE ;
Takeda, S ;
Shiomoto, A ;
Odate, T .
PROGRESS IN OCEANOGRAPHY, 1999, 43 (2-4) :205-234
[10]  
HASHIMOTO S, 2000, B JPN SOC FISH OCEAN, V64, P161