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The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton
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Zeitschriftentitel: | Limnology and Oceanography |
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Personen und Körperschaften: | , , |
In: | Limnology and Oceanography, 37, 1992, 2, S. 217-231 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Wiley
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Schlagwörter: |
author_facet |
Bentzen, E. Taylor, W. D. Millard, E. S. Bentzen, E. Taylor, W. D. Millard, E. S. |
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author |
Bentzen, E. Taylor, W. D. Millard, E. S. |
spellingShingle |
Bentzen, E. Taylor, W. D. Millard, E. S. Limnology and Oceanography The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton Aquatic Science Oceanography |
author_sort |
bentzen, e. |
spelling |
Bentzen, E. Taylor, W. D. Millard, E. S. 0024-3590 1939-5590 Wiley Aquatic Science Oceanography http://dx.doi.org/10.4319/lo.1992.37.2.0217 <jats:p>The substrate [<jats:italic>α</jats:italic>‐<jats:sup>3</jats:sup><jats:sc><jats:sup>2</jats:sup></jats:sc>P]ATP was used to represent the available fraction of the dissolved phosphomonoester (PME) pool and to measure its rate of assimilation by freshwater plankton in systems of low phosphorus availability. We compared [<jats:sup>32</jats:sup>P]ATP uptake to inorganic <jats:sup>32</jats:sup>PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> uptake. The upper bounds to the pool sizes of PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> and PME were estimated with Rigler bioassays, and these values, together with the uptake constants at ambient substrate concentrations, permit comparison of the uptake of organic and inorganic P by limnetic plankton. Affinity of the plankton for both substrates was high, and the estimated flux rates from both pools were similar, demonstrating that PME contributes significantly to total P uptake. We tested the hypothesis that algae >1 <jats:italic>µ</jats:italic>m preferentially assimilate P from PME but observed that the 0.2–1‐<jats:italic>µ</jats:italic>m size fraction dominates uptake of P from either source at ambient concentrations. The specific flux of P from PME into the 1–12‐<jats:italic>µ</jats:italic>m size fraction was often as high as that into the 0.2–1‐<jats:italic>µ</jats:italic>m fraction, but plankton >12 <jats:italic>µ</jats:italic>m typically incorporate <5% of the P from either source.</jats:p> The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton Limnology and Oceanography |
doi_str_mv |
10.4319/lo.1992.37.2.0217 |
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Online Free |
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Biologie Allgemeine Naturwissenschaft |
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ElectronicArticle |
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ai-49-aHR0cDovL2R4LmRvaS5vcmcvMTAuNDMxOS9sby4xOTkyLjM3LjIuMDIxNw |
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DE-L229 DE-D275 DE-Bn3 DE-Brt1 DE-Zwi2 DE-D161 DE-Gla1 DE-Zi4 DE-15 DE-Pl11 DE-Rs1 DE-105 DE-14 DE-Ch1 |
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Wiley, 1992 |
imprint_str_mv |
Wiley, 1992 |
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0024-3590 1939-5590 |
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0024-3590 1939-5590 |
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English |
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1992 |
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Wiley |
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Limnology and Oceanography |
source_id |
49 |
title |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_unstemmed |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_full |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_fullStr |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_full_unstemmed |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_short |
The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_sort |
the importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
topic |
Aquatic Science Oceanography |
url |
http://dx.doi.org/10.4319/lo.1992.37.2.0217 |
publishDate |
1992 |
physical |
217-231 |
description |
<jats:p>The substrate [<jats:italic>α</jats:italic>‐<jats:sup>3</jats:sup><jats:sc><jats:sup>2</jats:sup></jats:sc>P]ATP was used to represent the available fraction of the dissolved phosphomonoester (PME) pool and to measure its rate of assimilation by freshwater plankton in systems of low phosphorus availability. We compared [<jats:sup>32</jats:sup>P]ATP uptake to inorganic <jats:sup>32</jats:sup>PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> uptake. The upper bounds to the pool sizes of PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> and PME were estimated with Rigler bioassays, and these values, together with the uptake constants at ambient substrate concentrations, permit comparison of the uptake of organic and inorganic P by limnetic plankton. Affinity of the plankton for both substrates was high, and the estimated flux rates from both pools were similar, demonstrating that PME contributes significantly to total P uptake. We tested the hypothesis that algae >1 <jats:italic>µ</jats:italic>m preferentially assimilate P from PME but observed that the 0.2–1‐<jats:italic>µ</jats:italic>m size fraction dominates uptake of P from either source at ambient concentrations. The specific flux of P from PME into the 1–12‐<jats:italic>µ</jats:italic>m size fraction was often as high as that into the 0.2–1‐<jats:italic>µ</jats:italic>m fraction, but plankton >12 <jats:italic>µ</jats:italic>m typically incorporate <5% of the P from either source.</jats:p> |
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author | Bentzen, E., Taylor, W. D., Millard, E. S. |
author_facet | Bentzen, E., Taylor, W. D., Millard, E. S., Bentzen, E., Taylor, W. D., Millard, E. S. |
author_sort | bentzen, e. |
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container_start_page | 217 |
container_title | Limnology and Oceanography |
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description | <jats:p>The substrate [<jats:italic>α</jats:italic>‐<jats:sup>3</jats:sup><jats:sc><jats:sup>2</jats:sup></jats:sc>P]ATP was used to represent the available fraction of the dissolved phosphomonoester (PME) pool and to measure its rate of assimilation by freshwater plankton in systems of low phosphorus availability. We compared [<jats:sup>32</jats:sup>P]ATP uptake to inorganic <jats:sup>32</jats:sup>PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> uptake. The upper bounds to the pool sizes of PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> and PME were estimated with Rigler bioassays, and these values, together with the uptake constants at ambient substrate concentrations, permit comparison of the uptake of organic and inorganic P by limnetic plankton. Affinity of the plankton for both substrates was high, and the estimated flux rates from both pools were similar, demonstrating that PME contributes significantly to total P uptake. We tested the hypothesis that algae >1 <jats:italic>µ</jats:italic>m preferentially assimilate P from PME but observed that the 0.2–1‐<jats:italic>µ</jats:italic>m size fraction dominates uptake of P from either source at ambient concentrations. The specific flux of P from PME into the 1–12‐<jats:italic>µ</jats:italic>m size fraction was often as high as that into the 0.2–1‐<jats:italic>µ</jats:italic>m fraction, but plankton >12 <jats:italic>µ</jats:italic>m typically incorporate <5% of the P from either source.</jats:p> |
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imprint | Wiley, 1992 |
imprint_str_mv | Wiley, 1992 |
institution | DE-L229, DE-D275, DE-Bn3, DE-Brt1, DE-Zwi2, DE-D161, DE-Gla1, DE-Zi4, DE-15, DE-Pl11, DE-Rs1, DE-105, DE-14, DE-Ch1 |
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physical | 217-231 |
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publishDateSort | 1992 |
publisher | Wiley |
record_format | ai |
recordtype | ai |
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source_id | 49 |
spelling | Bentzen, E. Taylor, W. D. Millard, E. S. 0024-3590 1939-5590 Wiley Aquatic Science Oceanography http://dx.doi.org/10.4319/lo.1992.37.2.0217 <jats:p>The substrate [<jats:italic>α</jats:italic>‐<jats:sup>3</jats:sup><jats:sc><jats:sup>2</jats:sup></jats:sc>P]ATP was used to represent the available fraction of the dissolved phosphomonoester (PME) pool and to measure its rate of assimilation by freshwater plankton in systems of low phosphorus availability. We compared [<jats:sup>32</jats:sup>P]ATP uptake to inorganic <jats:sup>32</jats:sup>PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> uptake. The upper bounds to the pool sizes of PO<jats:sub>4</jats:sub><jats:sup>3‒</jats:sup> and PME were estimated with Rigler bioassays, and these values, together with the uptake constants at ambient substrate concentrations, permit comparison of the uptake of organic and inorganic P by limnetic plankton. Affinity of the plankton for both substrates was high, and the estimated flux rates from both pools were similar, demonstrating that PME contributes significantly to total P uptake. We tested the hypothesis that algae >1 <jats:italic>µ</jats:italic>m preferentially assimilate P from PME but observed that the 0.2–1‐<jats:italic>µ</jats:italic>m size fraction dominates uptake of P from either source at ambient concentrations. The specific flux of P from PME into the 1–12‐<jats:italic>µ</jats:italic>m size fraction was often as high as that into the 0.2–1‐<jats:italic>µ</jats:italic>m fraction, but plankton >12 <jats:italic>µ</jats:italic>m typically incorporate <5% of the P from either source.</jats:p> The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton Limnology and Oceanography |
spellingShingle | Bentzen, E., Taylor, W. D., Millard, E. S., Limnology and Oceanography, The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton, Aquatic Science, Oceanography |
title | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_full | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_fullStr | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_full_unstemmed | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_short | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_sort | the importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
title_unstemmed | The importance of dissolved organic phosphorus to phosphorus uptake by limnetic plankton |
topic | Aquatic Science, Oceanography |
url | http://dx.doi.org/10.4319/lo.1992.37.2.0217 |