METAL ENRICHMENT EXPERIMENTS IN THE WEDDELL-SCOTIA SEAS - EFFECTS OF IRON AND MANGANESE ON VARIOUS PLANKTON COMMUNITIES

被引:158
作者
BUMA, AGJ
DEBAAR, HJW
NOLTING, RF
VANBENNEKOM, AJ
机构
[1] Netherlands Institute for Sea Research (NIOZ), Den Burg Texel, 1790 AB
关键词
D O I
10.4319/lo.1991.36.8.1865
中图分类号
Q [生物科学];
学科分类号
07 ; 0710 ; 09 ;
摘要
During the European Polarstern Study (EPOS 1988/1989) in the Weddell and Scotia Seas, five series of metal enrichment experiments were carried out with natural plankton communities under ultraclean conditions. Despite a clear stimulation of growth by the addition of Fe, control bottles (no additions) also showed rapid buildup of Chl a and complete utilization of a major nutrient within 2 weeks, indicating nonlimiting ambient Fe levels. Effects of Mn additions were less pronounced or absent, whereas extra additions of Zn and Cu in one experiment showed little or no effect. The species composition of the plankton community, monitored by HPLC pigment analysis and microscopic observations, changed in favor of diatoms when Fe was added. The addition of Fe also caused an increase in microzooplankton densities and concentrations of pigment breakdown products. However, metal-mediated shifts in the plankton community were minor compared to major changes resulting from incubation. Changes were most pronounced in experiments where microzooplankton was strongly developed, presumably as a result of excluding mesozooplankton from the bottles. Fe had an impact on plankton growth and species composition, but other factors seem to be responsible for keeping phytoplankton productivity far from its potential in these Antarctic waters.
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页码:1865 / 1878
页数:14
相关论文
共 70 条
[1]  
ALLANSON BR, 1983, ANTARCTIC NUTRIENT C, P38
[2]   THE INFLUENCE OF AQUEOUS IRON CHEMISTRY ON THE UPTAKE OF IRON BY THE COASTAL DIATOM THALASSIOSIRA-WEISSFLOGII [J].
ANDERSON, MA ;
MOREL, FMM .
LIMNOLOGY AND OCEANOGRAPHY, 1982, 27 (05) :789-813
[4]   SUMMER WEDDELL SEA MICROPLANKTON - ASSEMBLAGE STRUCTURE, DISTRIBUTION AND ABUNDANCE, WITH SPECIAL EMPHASIS ON THE TINTINNINA [J].
BOLTOVSKOY, D ;
ALDER, VA ;
SPINELLI, F .
POLAR BIOLOGY, 1989, 9 (07) :447-456
[5]   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
[6]  
BROECKER WS, 1990, CYCLES, V4, P3
[7]   COMPLEXATION OF ZINC BY NATURAL ORGANIC-LIGANDS IN THE CENTRAL NORTH PACIFIC [J].
BRULAND, KW .
LIMNOLOGY AND OCEANOGRAPHY, 1989, 34 (02) :269-285
[8]   PHYTOPLANKTON AND CHLOROPHYLL IN THE GERLACHE AND BRANSFIELD STRAITS OF ANTARCTICA [J].
BURKHOLDER, PR ;
SIEBURTH, JM .
LIMNOLOGY AND OCEANOGRAPHY, 1961, 6 (01) :45-52
[9]   TIDAL AND SEASONAL-VARIATION IN PARTICULATE AND DISSOLVED ORGANIC-CARBON IN THE WESTERN DUTCH WADDEN SEA AND MARSDIEP TIDAL INLET [J].
CADEE, GC .
NETHERLANDS JOURNAL OF SEA RESEARCH, 1982, 15 (02) :228-249
[10]  
CEDERLOF U, 1989, BER POLARFORSCH, V65, P14