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Influence of different nitrogen to silica ratios and artificial mixing on the structure of a summer phytoplankton community from the Swedish west coast (Gullmar fjord)

Schollhorn, E. and Graneli, Edna LU (1996) In Journal of Sea Research 35(1-3). p.159-167
Abstract
A natural summer phytoplankton community from the Gullmar Fjord (Skagerrak, Swedish west coast) was diluted 10 times with filtered seawater in twelve 300-dm(3) polyethylene cylinders. Nutrients were added to produce two different molar ratios of nitrogen to silicon (N/Si 3.2/3.2 mu M=1 and 12.8/3.2 mu M=4). Three cylinders of each nutrient treatment were carefully mixed while the other three of each nutrient treatment remained unmixed. Diatoms (Nitzschia and Chaetoceros species) were favoured by low dissolved NISI molar ratios (N/Si 1) and by mixing. Diatoms increased as a percentage of total phytoplankton biomass from 11% initially to about 32% in the unmixed and to 46% in the mixed cylinders. At high N/SI ratios (N/Si 4) small... (More)
A natural summer phytoplankton community from the Gullmar Fjord (Skagerrak, Swedish west coast) was diluted 10 times with filtered seawater in twelve 300-dm(3) polyethylene cylinders. Nutrients were added to produce two different molar ratios of nitrogen to silicon (N/Si 3.2/3.2 mu M=1 and 12.8/3.2 mu M=4). Three cylinders of each nutrient treatment were carefully mixed while the other three of each nutrient treatment remained unmixed. Diatoms (Nitzschia and Chaetoceros species) were favoured by low dissolved NISI molar ratios (N/Si 1) and by mixing. Diatoms increased as a percentage of total phytoplankton biomass from 11% initially to about 32% in the unmixed and to 46% in the mixed cylinders. At high N/SI ratios (N/Si 4) small flagellates (1-6 mu m) became dominant and diatoms never constituted more than 20% of total phytoplankton biomass. (Less)
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author
publishing date
type
Contribution to journal
publication status
published
subject
categories
Higher Education
in
Journal of Sea Research
volume
35
issue
1-3
pages
159 - 167
publisher
Elsevier
external identifiers
  • scopus:0029757591
ISSN
1385-1101
DOI
10.1016/s1385-1101(96)90743-1
language
English
LU publication?
no
id
b325afd0-c626-44b5-bd39-58c88079c757 (old id 7994046)
date added to LUP
2015-09-29 13:14:48
date last changed
2017-07-30 03:50:12
@article{b325afd0-c626-44b5-bd39-58c88079c757,
  abstract     = {A natural summer phytoplankton community from the Gullmar Fjord (Skagerrak, Swedish west coast) was diluted 10 times with filtered seawater in twelve 300-dm(3) polyethylene cylinders. Nutrients were added to produce two different molar ratios of nitrogen to silicon (N/Si 3.2/3.2 mu M=1 and 12.8/3.2 mu M=4). Three cylinders of each nutrient treatment were carefully mixed while the other three of each nutrient treatment remained unmixed. Diatoms (Nitzschia and Chaetoceros species) were favoured by low dissolved NISI molar ratios (N/Si 1) and by mixing. Diatoms increased as a percentage of total phytoplankton biomass from 11% initially to about 32% in the unmixed and to 46% in the mixed cylinders. At high N/SI ratios (N/Si 4) small flagellates (1-6 mu m) became dominant and diatoms never constituted more than 20% of total phytoplankton biomass.},
  author       = {Schollhorn, E. and Graneli, Edna},
  issn         = {1385-1101},
  language     = {eng},
  number       = {1-3},
  pages        = {159--167},
  publisher    = {Elsevier},
  series       = {Journal of Sea Research},
  title        = {Influence of different nitrogen to silica ratios and artificial mixing on the structure of a summer phytoplankton community from the Swedish west coast (Gullmar fjord)},
  url          = {http://dx.doi.org/10.1016/s1385-1101(96)90743-1},
  volume       = {35},
  year         = {1996},
}