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  Gut passage of phosphorus-limited algae through Daphnia: do they take up nutrients in the process?

Boersma, M., & Wiltshire, K. H. (2006). Gut passage of phosphorus-limited algae through Daphnia: do they take up nutrients in the process? "Natural selection is ecology in action". Dedicated to Professor Dr. Winfried Lampert on the occasion of his 65th birthday, 489-500. doi:10.1127/0003-9136/2006/0167-0489.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D87F-6 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-000F-D880-D
Genre: Journal Article

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boersma_2006.pdf (Publisher version), 136KB
 
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 Creators:
Boersma, Maarten1, Author              
Wiltshire, Karen H.1, Author              
Affiliations:
1Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547              

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Free keywords: excretion; nutrient limitation; stoichiometry; homeostasis; Sphaerocystis
 Abstract: Nutrient-limited algae are known to be a food source of inferior quality for zooplankters. Three factors are thought to determine this poor quality: direct elemental limitations of the algae, biochemical limitations and an increased resistance to digestion because of an increase in cell wall thickness. Thus far, most studies have concentrated on the effect of the algae on the daphniids. It has recently been hypothesized, however, that while going through the digestive tract of herbivorous zooplankters the digestion resistant nutrient-limited algae might actually take-up nutrients, in a similar way as it has been described for gelatinous alga such as Sphaerocystis. In this study, we present results of different experiments investigating whether nutrient-limited algae are indeed more resistant to digestion, and whether nutrient-limited algae take-up the limiting nutrient in the guts of their predators. We observed that digestion resistance is not very important, and that it can only be observed at high food levels. As a result, we could not find any evidence for nutrient uptake of these algae when they pass through the daphniids. We did find that animals adapted to low-P environments have a higher incorporation efficiency for P, and conclude that digestion resistance in nutrient stressed algae is of very limited ecological relevance.

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Language(s): eng - English
 Dates: 2006-09
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: eDoc: 291544
DOI: 10.1127/0003-9136/2006/0167-0489
Other: 2495/S 38572
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Title: "Natural selection is ecology in action". Dedicated to Professor Dr. Winfried Lampert on the occasion of his 65th birthday
Source Genre: Issue
 Creator(s):
Boersma, Maarten1, Editor            
Santer, Barbara1, Editor            
Affiliations:
1 Department Ecophysiology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_976547            
Publ. Info: -
Pages: - Volume / Issue: - Sequence Number: - Start / End Page: 489 - 500 Identifier: -

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Title: Archiv für Hydrobiologie
  Alternative Title : Arch. Hydrobiol.
Source Genre: Journal
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Publ. Info: -
Pages: - Volume / Issue: 167 (1-4) Sequence Number: - Start / End Page: - Identifier: ISSN: 0003-9136