Coccolithophore ecology at the HOT station ALOHA, Hawaii

被引:124
作者
Cortés, MY [1 ]
Bollmann, J [1 ]
Thierstein, HR [1 ]
机构
[1] ETH Zentrum, Inst Geol, CH-8092 Zurich, Switzerland
关键词
D O I
10.1016/S0967-0645(00)00165-X
中图分类号
P7 [海洋学];
学科分类号
0707 ;
摘要
Cell densities of total coccolithophores and dominant taxa were determined in 183 samples from the upper 200 m of the water column at about monthly intervals between January 1994 and August 1996 at the HOT station ALOHA, Hawaii. High cell densities were observed twice a year, in March (up to 41 x 10(3) cells 1(-1)) and in September/October (up to 52 x 10(3) cells 1(-1)). In the intervening months, cell densities were extremely low (0-20 x 10(3) cells 1(-1)), reflecting a strong seasonality. The main production of coccolithophores took place in the middle photic zone between 50 and 100 m water depth. In total 125 coccolithophore species were identified but only five constituted on average more than 30% of the community: Emiliania huxleyi, Umbellosphaera irregularis, U. tenuis, Florisphaera profunda and Gephyrocapsa ericsonii. The generally low, but seasonally dynamic coccolithophore cell density variability is compared with in situ measurements of environmental parameters. Correlation analyses between cell density variability of the dominant taxa and potentially controlling environmental parameters show significant correlation coefficients when the data set was separated into upper and lower photic zone. Cell densities of all dominant taxa are most highly correlated with temperature variability. U. irregularis is positively correlated in the upper photic zone, whereas E. huxleyi and G. ericsonii are negatively correlated. In the lower photic zone, F. profunda cell densities are positively correlated with light, which corresponds to the maximum bottom-up control (i.e. by physical forcing) of any species encountered. The surprisingly low correlations of cell densities with nitrate and phosphate may be caused by insufficient sampling resolution, nutrient levels close to detection limits, or both. (C) 2001 Elsevier Science Ltd. All rights reserved.
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页码:1957 / 1981
页数:25
相关论文
共 62 条
[1]   FLORISPHAERA-PROFUNDA, A POSSIBLE NANNOPLANKTON INDICATOR OF LATE QUATERNARY CHANGES IN SEA-WATER TURBIDITY AT THE NORTHWESTERN MARGIN OF THE PACIFIC [J].
AHAGON, N ;
TANAKA, Y ;
UJIIE, H .
MARINE MICROPALEONTOLOGY, 1993, 22 (03) :255-273
[2]   BIOLOGICAL AND OPTICAL-PROPERTIES OF MESOSCALE COCCOLITHOPHORE BLOOMS IN THE GULF OF MAINE [J].
BALCH, WM ;
HOLLIGAN, PM ;
ACKLESON, SG ;
VOSS, KJ .
LIMNOLOGY AND OCEANOGRAPHY, 1991, 36 (04) :629-643
[3]   Insolation cycles as a major control equatorial Indian Ocean primary production [J].
Beaufort, L ;
Lancelot, Y ;
Camberlin, P ;
Cayre, O ;
Vincent, E ;
Bassinot, F ;
Labeyrie, L .
SCIENCE, 1997, 278 (5342) :1451-1454
[4]  
BEERS J R, 1975, Internationale Revue der Gesamten Hydrobiologie, V60, P607
[5]  
Berger WH, 1976, CHEM OCEANOGR, P265
[6]   TEMPORAL AND SPATIAL VARIABILITY OF PHYTOPLANKTON IN A SUB-TROPICAL ECOSYSTEM [J].
BIENFANG, PK ;
SZYPER, JP ;
OKAMOTO, MY ;
NODA, EK .
LIMNOLOGY AND OCEANOGRAPHY, 1984, 29 (03) :527-539
[7]   Seasonal cycles of temperature, salinity and dissolved oxygen observed in the Hawaii Ocean Time-series [J].
Bingham, FM ;
Lukas, R .
DEEP-SEA RESEARCH PART II-TOPICAL STUDIES IN OCEANOGRAPHY, 1996, 43 (2-3) :199-213
[8]   Morphology and biogeography of Gephyrocapsa coccoliths in Holocene sediments [J].
Bollmann, J .
MARINE MICROPALEONTOLOGY, 1997, 29 (3-4) :319-350
[9]  
Brand Larry E., 1994, P39
[10]   LIMITATION OF MARINE-PHYTOPLANKTON REPRODUCTIVE RATES BY ZINC, MANGANESE, AND IRON [J].
BRAND, LE ;
SUNDA, WG ;
GUILLARD, RRL .
LIMNOLOGY AND OCEANOGRAPHY, 1983, 28 (06) :1182-1198