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A practical handbook of seawater analysis
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The article was published on 1968-01-01 and is currently open access. It has received 11288 citations till now. The article focuses on the topics: Seawater.read more
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Thermal acclimation and whole-plant carbon balance in Zostera marina L. (eelgrass)
Richard C. Zimmerman,Richard C. Zimmerman,Robert D. Smith,Robert D. Smith,Randall S. Alberte,Randall S. Alberte +5 more
TL;DR: Investigation of thermal acclimation in eelgrass Zostera marina L. marina found rapid mortality at high temperatures during summer may result instead from thermal disruption of metabolism while internal C reserves may be important in meeting C demand during winter periods of low light availability, particularly among high-latitude populations.
Journal ArticleDOI
Effects of nitrate on the diurnal vertical migration, carbon to nitrogen ratio, and the photosynthetic capacity of the dinoflagellate Gymnodinium splendens
John J. Cullen,S. G. Horrigan +1 more
Abstract: A non-thecate dinoflagellate, Gymnodinium splendens, was studied in a 12 d laboratory experiment in 2.0x0.25 m containers in which light, temperature, and nutrients could be manipulated. Under a 12 h light: 12 h dark cycle, the dinoflagellates exhibited diurnal vertical migrations, swimming downward before the dark period began and upward before the end of the dark period. This vertical migration probably involved geotaxis and a diel rhythm, as well as light-mediated behavior. The vertical distribution of nitrate affected the behavior and physiology of the dinoflagellate. When nitrate was present throughout the container, the organisms resembled those in exponential batch culture both in C:N ratios and photosynthetic capacity (Pmax); moreover, they migrated to the surface during the day. In contrast, when nitrate was depleted, C:N ratios increased, Pmax decreased, and the organisms formed a subsurface layer at a depth corresponding to the light level at which photosynthesis saturated. When nitrate was present only at the bottom of the tank, C:N ratios of the population decreased until similar to those of nutrient-saturated cells and Pmax increased; however, the dinoflagellates behaved the same as nutrient-depleted cells, forming a subsurface layer during the light period. Field measurements revealed a migratory subsurface chlorophyll maximum layer dominated by G. splendens. It was just above the nitracline during the day, and in the nitracline during the night, which concurs with our laboratory observations.
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Reduced light increases herbivore production due to stoichiometric effects of light/nutrient balance
TL;DR: Light/ nutrient balance affects the degree of mismatch between primary producers and herbivores in nature, which in turn influences mass-transfer efficiencies along food chains, and it is essential to take into account changes in light/nutrient balance and its effects on the stoichiometry of autotroph-herbivore interactions.
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Alongshore transport of a toxic phytoplankton bloom in a buoyancy current: Alexandrium tamarense in the Gulf of Maine
Peter Franks,Donald M. Anderson +1 more
TL;DR: The significant role of alongshore transport of established populations of A. tamarense in controlling the location and timing of paralytic shellfish poisoning (PSP) outbreaks in May and June along the southwestern coast of the Gulf of Maine is demonstrated.
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The chemical mass balance in the Amazon plume I: The nutrients
TL;DR: In this paper, the authors reported that the Amazon plume was dominated by a diatom blood centered on the 10 x 10−3 isohaline, which removed the nitrate and phosphate from the surficial layer.