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In situ feeding and element removal in the symbiont-bearing sponge Theonella swinhoei: Bulk DOC is the major source for carbon
The vast majority of organic matter in the world ocean is found in the dissolved pool. However, no evidence has been demonstrated for direct uptake of bulk dissolved organic matter (DOM) by organismsExpand
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Phytoplankton distribution and grazing near coral reefs
Depletion of phytoplankton cells and pigments over coral reefs was studied in the Gulf of Aqaba, Red Sea, during 1994-1996. Phytoplankton abundance and chlorophyll (Chl) a concentrations were 1565%Expand
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InEx—a direct in situ method to measure filtration rates, nutrition, and metabolism of active suspension feeders
Sponges, bivalves, and tunicates play an important role in the trophic dynamics of many benthic communities. However, direct in situ measurements of their diet composition, filtration, and excretionExpand
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In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible
Glass sponges are conspicuous inhabitants of benthic communities in the cool waters of the Antarctic and north Pacific continental shelf. We used an ROV outfitted with a new device for simultaneousExpand
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Boundary layer turbulence and flow structure over a fringing coral reef
Measurements of velocity and rates of turbulence were made across a fringing coral reef in the Gulf of Aqaba, Red Sea, to determine the effect that the rough topography has on boundary layer mixingExpand
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The Sponge Pump: The Role of Current Induced Flow in the Design of the Sponge Body Plan
Sponges are suspension feeders that use flagellated collar-cells (choanocytes) to actively filter a volume of water equivalent to many times their body volume each hour. Flow through sponges isExpand
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Near- bottom depletion of zooplankton over coral reefs: I: diurnal dynamics and size distribution
Changes in the near-bottom abundance of zooplankton on scales of centimeters to meters and hours to seasons are of great importance to corals and other benthic zooplanktivores. Our objective was toExpand
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Size independent selective filtration of ultraplankton by hexactinellid glass sponges
Selective feeding by flagellate and ciliate protists is important in shaping microbial communities in pelagic habitats. While less is known of predation on microbial communities in benthic habitats,Expand
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Trophic niche separation that facilitates co‐existence of high and low microbial abundance sponges is revealed by in situ study of carbon and nitrogen fluxes
Sponges are commonly divided into high (HMA) and low (LMA) microbial-abundance species according to the bacterial biomass in their tissue. These two groups reflect distinct aquiferous structures andExpand
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Thermally Driven Exchanges between a Coral Reef and the Adjoining Ocean
Abstract In this paper hydrographic observations made over a fringing coral reef at the northern end of the Gulf of Aqaba near Eilat, Israel, are discussed. These data show exchange flows driven byExpand
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