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> Conley Daniel J.
> Meire Patrick >
The trapping of org...
The trapping of organic matter within plant patches in the channels of the Okavango Delta : a matter of quality
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- Schoelynck, Jonas (author)
- University of Antwerp
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- Schaller, Jörg (author)
- University of Bayreuth
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- Murray-Hudson, Mike (author)
- University of Botswana
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- Frings, Patrick J. (author)
- Naturhistoriska riksmuseet,Swedish Museum of Natural History,GFZ German Research Centre for Geosciences,Enheten för geovetenskap
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- Conley, Daniel J. (author)
- Lund University,Lunds universitet,Kvartärgeologi,Geologiska institutionen,Naturvetenskapliga fakulteten,Quaternary Sciences,Department of Geology,Faculty of Science
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- van Pelt, Dimitri (author)
- University of Antwerp
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- Mosimane, Keotshephile (author)
- University of Botswana
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- Gondwe, Mangaliso J. (author)
- University of Botswana
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- Wolski, Piotr (author)
- University of Botswana
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- Meire, Patrick (author)
- University of Antwerp
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- Struyf, Eric (author)
- University of Antwerp
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(creator_code:org_t)
- 2017-05-02
- 2017
- English.
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In: Aquatic Sciences. - : Springer Science and Business Media LLC. - 1015-1621 .- 1420-9055. ; 79:3, s. 661-674
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http://dx.doi.org/10...
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Abstract
Subject headings
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- The role of in-stream aquatic vegetation as ecosystem engineers in the distribution of organic matter was investigated in the Okavango Delta, one of the world’s largest oligotrophic wetlands. The Okavango channel beds are covered up to 50% with submerged macrophyte patches. By accumulating and concentrating organic matter in the sediments below the patches, macrophytes are likely able to locally forestall a deficiency of nutrients. Up to 21 times more N, 18 times more C, 13 times more P and 6 times more Si can be found in vegetated sediments compared to non-vegetated sediments. Nutrient specific accumulation relates to its relative scarcity in the overlaying water. There is a depletion of dissolved N relative to P, whereas Si is relatively abundant. The Okavango Delta water can generally be characterised as oligotrophic based on plant species composition (e.g. presence of carnivorous plants and absence of floating plants), low plant N:P ratios, and low nutrient- and element-concentrations. Local mineralization and intensified nutrient cycling in the sediments is hypothesized to be crucial for the macrophytes’ survival because it provides a key source of the essential nutrients which plants otherwise cannot obtain in sufficient quantities from the nutrient poor water. By engineering the ecosystem as such, channel vegetation also retards the loss of elements and nutrients to island groundwater flow, contributing to one of the key processes driving the high productivity of the Okavango Delta, making it unique among its kind.
Subject headings
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Oceanografi, hydrologi och vattenresurser (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Oceanography, Hydrology and Water Resources (hsv//eng)
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geokemi (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geochemistry (hsv//eng)
Keyword
- Aquatic ecosystem
- Carbon pools
- Ecosystem engineering
- Nutrient accumulation
- Nutrient fixation
- Organic rich sediments
- Wetland
- The changing Earth
Publication and Content Type
- art (subject category)
- ref (subject category)
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- By the author/editor
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Schoelynck, Jona ...
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Schaller, Jörg
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Murray-Hudson, M ...
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Frings, Patrick ...
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Conley, Daniel J ...
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van Pelt, Dimitr ...
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Mosimane, Keotsh ...
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Gondwe, Mangalis ...
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Wolski, Piotr
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Meire, Patrick
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Struyf, Eric
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- About the subject
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Oceanography Hyd ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Biological Scien ...
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and Ecology
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Environmental Sc ...
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- NATURAL SCIENCES
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NATURAL SCIENCES
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and Earth and Relate ...
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and Geochemistry
- Articles in the publication
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Aquatic Sciences
- By the university
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Lund University
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Swedish Museum of Natural History