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Particulate organic matter as an alternative nutrient source for tropical Sargassum species (Fucales, Phaeophyceae)

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dc.contributor Australian Institute Of Marine Science (aims) en
dc.contributor Australian Inst Marine Sci
dc.contributor Crc Reef Res
dc.contributor Australian Institute Of Marine Science SCHAFFELKE, B 2013-02-28T06:44:04Z 2017-03-21T00:49:49Z 2017-03-21T00:49:49Z 2019-07-08T02:15:24Z 2013-02-28T06:44:04Z 2013-02-28T06:44:04Z 2017-03-21T00:49:49Z 2019-07-08T02:15:24Z 1999-12-01
dc.identifier 1696 en
dc.identifier.citation Schaffelke B (1999) Particulate organic matter as an alternative nutrient source for tropical Sargassum species (Fucales, Phaeophyceae). Journal of Phycology. 35: 1150-1157. en
dc.identifier.issn 0022-3646
dc.description.abstract Large Fucales are abundant on coastal coral reefs of the Great Barrier Reef, but are often limited by the availability of inorganic nutrients. Particle loads in these reef waters are high, which is generally perceived as detrimental for aquatic plants due to a reduction of light. Here, I provide evidence that several abundant Sargassum species supplement their nutrient supply with nutrients derived from the layer of particulate matter (PM) deposited on their thalli. In experiments involving removal or addition of PM, growth rates of Sargassum spp, were up to 180% higher when particles were present on the thalli. Tissue nitrogen and phosphorus levels of thalli with a surface PM layer were 10%-30% higher than those of thalli without PM. The amount of PM deposited in situ on thalli of five species of brown algae ranged from 0.6 to 0.9 g C-org.9(-1) dry weight alga, depending on the species' morphology. I suggest that a nutrient-rich diffusive boundary layer is created on the thallus surface by an epiphytic microbial community that remineralizes the particulate nutrients. When algal growth is nutrient limited, the use of particle-derived nutrients as a source alternative to nutrients in the water column may outweigh any potential adverse effects of the thallus particle layer.
dc.language English
dc.language en en
dc.relation.ispartof Journal of Phycology - pages: 35: 1150-1157 en
dc.relation.ispartof Null
dc.relation.uri en
dc.subject Great-barrier-reef
dc.subject Marine & Freshwater Biology
dc.subject Community
dc.subject Alternative Nutrient Source
dc.subject Nutrient
dc.subject Coral Reef
dc.subject Kelp Detritus
dc.subject Limited Growth
dc.subject Particulate Matter
dc.subject Coral-reef
dc.subject Sargassum
dc.subject Australia
dc.subject Nitrogen
dc.subject Lagoon
dc.subject Plant Sciences
dc.subject Diffusive Boundary Layer
dc.subject Baccularia
dc.subject Deposition
dc.title Particulate organic matter as an alternative nutrient source for tropical Sargassum species (Fucales, Phaeophyceae)
dc.type journal article en
dc.identifier.wos WOS:000084762200007

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