NDLI: Enhanced pore-water nutrient fluxes by the upside-down jellyfish Cassiopea sp. in a Red Sea coral reef

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Enhanced pore-water nutrient fluxes by the upside-down jellyfish Cassiopea sp. in a Red Sea coral reef

Content Provider	Semantic Scholar
Author	Jantzen, Carin Wild, Christian Rasheed, Mohammed El-Zibdah, Mohammed Richter, Claudio
Copyright Year	2010
Abstract	The common circum-tropical jellyfish Cassiopea sp., unlike other members of the Rhi- zostomidae (Scyphozoa), exhibits a primarily benthic life. The peculiar orientation of its exumbrella against the sediment is believed to be associated with its mainly autotrophic nutrition, i.e. exposing its zooxanthellae-bearing photosynthetic oral appendages to the sunlight. Here we show that the jel- lyfish also acts as a nutrient pump, drawing nutrient-rich pore waters from the permeable sediments. Depletion of pore-water ammonium in situ, light-enhanced ammonium uptake, and high rates of photosynthesis determined via oxygen flux measurements and underwater fluorometer analysis (rapid light curves) show that Cassiopea sp. effectively harnesses pore-water nutrients. At high den- sities Cassiopea sp. may facilitate benthic-pelagic coupling and primary production in oligotrophic coral reefs.
Starting Page	117
Ending Page	125
Page Count	9
File Format	PDF HTM / HTML
DOI	10.3354/meps08623
Volume Number	411
Alternate Webpage(s)	https://www.int-res.com/articles/suppl/m411p117_supp.pdf
Alternate Webpage(s)	https://www.int-res.com/articles/meps2010/411/m411p117.pdf
Alternate Webpage(s)	https://doi.org/10.3354/meps08623
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article

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