Salinity as an Ecological Factor in Marine Phytoplankton

Braarud, Trygve

doi:10.1111/j.1399-3054.1951.tb07512.x

Cited by 70 publications

(25 citation statements)

References 4 publications

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“…At the other extreme, it is seldom found in pools whose salinity is lower than 4 %0' in which respect it differs from many other supra-littoral species which tolerate or even preferthe lower salinities (Droop, 1953a,table 10;1955, table 1). The optimum salinity for the neritic species studied by Braarud (1951) ranged from 16 to 20 %0 with upper and lower toleration limits only slightly narrower than those reported here for Oxyrrhis. It seems that salinity tolerance per se cannot satisfactorily account for the absence of neritic species from supra-littoral pools or of Oxyrrhis from the sea.…”

Section: Temperature and Phmentioning

confidence: 83%

“…Braarud (1951) Oxyrrhis is most often encountered in brackish rock pools above the highwater mark and sometimes occurs in water of very high salinity. At the other extreme, it is seldom found in pools whose salinity is lower than 4 %0' in which respect it differs from many other supra-littoral species which tolerate or even preferthe lower salinities (Droop, 1953a,table 10;1955, table 1).…”

Section: Temperature and Phmentioning

confidence: 99%

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A note on some physical conditions for cultivating Oxyrrhis marina

Droop

1959

J. Mar. Biol. Ass.

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This note concerns a series of experiments to determine the best conditions of salinity, temperature and pH for cultivating the euryhaline phagotrophic dinoflagellate Oxyrrhis marina Dujardin.The strain of Oxyrrhis employed was isolated from a brackish pool at Tvarminne, Finland (Droop, 1953a, b). The culture medium for the experiments contained soil extract and an artificial sea water, SW 1 (NaCl, MgCl26H20, KCl, and CaS042H20 in the proportions by weight 15:2'5: 0'4:0'5), and for food a small quantity of the yeast Saccharomyces exiguus was administered daily from an agar culture with a wire loop.The rate of cell division during the logarithmic phase of growth is a measure of the suitability of conditions prevailing. Since growth is by binary fission the number of divisions per day is conveniently given by the relative growth rate when expressed as the binary logarithm of the relative increase in cell numbers per day. This parameter, denoted by k, is simply the slope of the growth curve when cell numbers are expressed as binary logarithms.Cell counts were made in a deep chamber which allowed the whole of a O' 1 mI. sample to be counted if required. Five samples were usually counted but when numbers exceeded 100 per sample it was more convenient to count several areas within the sample with the aid of a squared eyepiece graticule and compute accordingly.The statistical treatment in the salinity experiments followed conventional procedures of regression analysis (Snedecor, 1946) The salinity experiments were required to determine the optimum salinity and also the effect of transfer from one salinity to another. They consisted of 1 %0, titrated chloride expressed as g NaCl per I.

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Section: Temperature and Phmentioning

confidence: 83%

Section: Temperature and Phmentioning

confidence: 99%

A note on some physical conditions for cultivating Oxyrrhis marina

Droop

1959

J. Mar. Biol. Ass.

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“…Prorocentrum micans ( Braarud 1951) and Ceratium fusus and C. tripos ( Nordli 1953) grow best at salinities around 20%0. Nevertheless, they grow moderately well between 15%0 and 40%0.…”

Section: Discussionmentioning

confidence: 99%

Distribution of Phytoplankton Species With Respect to Salinity Between the Coast of Southern New England and Bermuda1

Hulburt

Rodman

1963

Limnology & Oceanography

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“…It is not hard to envision ge-netic differentiation developing in species living on both sides of these barriers. Braarud (1951Braarud ( , 1961 was the first to consider this possibility, but his data were not conclusive.…”

mentioning

confidence: 99%

Genetic variability and spatial patterns of genetic differentiation in the reproductive rates of the marine coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica1,2

Brand

1982

Limnology & Oceanography

114

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The acclimated reproductive rates of 73 clones of Emiliuniu huxleyi and 19 clones of Gephyrocupsu oceunicu were measured. Statistically,significant genetic variability in reproductive rates was found among clones from single water bottles in both species. Genetic differentiation was found between populations from different water masses, but not within water masses. The spatial patterns of genetic differentiation appear to be different in the two species.

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Salinity as an Ecological Factor in Marine Phytoplankton

Cited by 70 publications

References 4 publications

A note on some physical conditions for cultivating Oxyrrhis marina

A note on some physical conditions for cultivating Oxyrrhis marina

Distribution of Phytoplankton Species With Respect to Salinity Between the Coast of Southern New England and Bermuda1

Genetic variability and spatial patterns of genetic differentiation in the reproductive rates of the marine coccolithophores Emiliania huxleyi and Gephyrocapsa oceanica1,2

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