Aquatic Microbial Ecology 34:79
ABSTRACT: The species composition of spring blooms varies over open marine regions, displaying both spatial and inter-annual differences. We used semi-continuous cultures to promote speciesspecific blooms and investigate associated microbial food-web dynamics and inorganic nutrient utilization. Begi...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1062.5493 2023-05-15T15:13:09+02:00 Aquatic Microbial Ecology 34:79 C Lovejoy N M Price L Legendre Inter - Research The Pennsylvania State University CiteSeerX Archives application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.5493 http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.5493 http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf text ftciteseerx 2020-04-19T00:22:21Z ABSTRACT: The species composition of spring blooms varies over open marine regions, displaying both spatial and inter-annual differences. We used semi-continuous cultures to promote speciesspecific blooms and investigate associated microbial food-web dynamics and inorganic nutrient utilization. Beginning with high-nutrient, low-biomass water from 13 m depth, we compared the changes that took place over 9 d in 2 treatments: (1) NEW, a 'new-nutrient' treatment that simulated horizontal or vertical advection; every 2 d, both particles and dissolved organic matter were removed and ca. 25% of the volume of the container was replaced with nutrient-rich seawater from 200 m depth. (2) REC, a recycling treatment simulating grazing and sinking losses without nutrient replacement, i.e. conditions mimicking sharply stratified water columns; in this treatment the same volume of water was removed, but was then returned to the container following filtration through a 2.0 µm filter. In the NEW treatment, diatoms consumed the added nutrients and dominated the production and biomass of the protist community. Total protist community production in the REC treatment was significantly lower than in the NEW treatment, with either a late or no diatom bloom and prymnesiophytes such as Phaeocystis spp. attaining higher proportional biomass. Total production rates for heterotrophic protists, bacteria and viruses did not differ significantly between treatments. Nutrient consumption by the ensuing communities differed between the 2 treatments, with a significantly greater proportion of total inorganic nutrients consumed in the NEW than in the REC treatment. The results demonstrate that the character of nutrient supply and loss influences protist community structure and subsequent bulk nutrient utilization. KEY WORDS: Nutrient supply · Protist species · Spring-bloom initiation · Succession · Phytoplankton · Marine · Arctic Resale or republication not permitted without written consent of the publisher Aquat Microb Ecol 34: ... Text Arctic Phytoplankton Unknown Arctic |
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ABSTRACT: The species composition of spring blooms varies over open marine regions, displaying both spatial and inter-annual differences. We used semi-continuous cultures to promote speciesspecific blooms and investigate associated microbial food-web dynamics and inorganic nutrient utilization. Beginning with high-nutrient, low-biomass water from 13 m depth, we compared the changes that took place over 9 d in 2 treatments: (1) NEW, a 'new-nutrient' treatment that simulated horizontal or vertical advection; every 2 d, both particles and dissolved organic matter were removed and ca. 25% of the volume of the container was replaced with nutrient-rich seawater from 200 m depth. (2) REC, a recycling treatment simulating grazing and sinking losses without nutrient replacement, i.e. conditions mimicking sharply stratified water columns; in this treatment the same volume of water was removed, but was then returned to the container following filtration through a 2.0 µm filter. In the NEW treatment, diatoms consumed the added nutrients and dominated the production and biomass of the protist community. Total protist community production in the REC treatment was significantly lower than in the NEW treatment, with either a late or no diatom bloom and prymnesiophytes such as Phaeocystis spp. attaining higher proportional biomass. Total production rates for heterotrophic protists, bacteria and viruses did not differ significantly between treatments. Nutrient consumption by the ensuing communities differed between the 2 treatments, with a significantly greater proportion of total inorganic nutrients consumed in the NEW than in the REC treatment. The results demonstrate that the character of nutrient supply and loss influences protist community structure and subsequent bulk nutrient utilization. KEY WORDS: Nutrient supply · Protist species · Spring-bloom initiation · Succession · Phytoplankton · Marine · Arctic Resale or republication not permitted without written consent of the publisher Aquat Microb Ecol 34: ... |
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The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
C Lovejoy N M Price L Legendre Inter - Research |
spellingShingle |
C Lovejoy N M Price L Legendre Inter - Research Aquatic Microbial Ecology 34:79 |
author_facet |
C Lovejoy N M Price L Legendre Inter - Research |
author_sort |
C Lovejoy |
title |
Aquatic Microbial Ecology 34:79 |
title_short |
Aquatic Microbial Ecology 34:79 |
title_full |
Aquatic Microbial Ecology 34:79 |
title_fullStr |
Aquatic Microbial Ecology 34:79 |
title_full_unstemmed |
Aquatic Microbial Ecology 34:79 |
title_sort |
aquatic microbial ecology 34:79 |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.5493 http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf |
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Arctic |
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Arctic Phytoplankton |
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Arctic Phytoplankton |
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http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf |
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http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.5493 http://biology.mcgill.ca/faculty/price/articles/Lovejoy_etal_2004.pdf |
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