In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible

  title={In situ feeding and metabolism of glass sponges (Hexactinellida, Porifera) studied in a deep temperate fjord with a remotely operated submersible},
  author={Gitai Yahel and Frank A. Whitney and Henry M. Reiswig and Dafne Eerkes-Medrano and Sally P. Leys},
  journal={Limnology and Oceanography},
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 simultaneous sampling of water inhaled and exhaled by the sponges to provide the first data on the nutritional ecology and metabolism of two glass sponge species in their natural deep‐water habitat (120–160 m). Aphrocallistes vastus and Rhabdocalyptus dawsoni were found to be mostly bacteriovores, removing up to… 

Size independent selective filtration of ultraplankton by hexactinellid glass sponges

It is suggested that selective filtration involves individual processing, recognition, sorting, and transport of each particle through the sponges' syncytial tissue in order to shape microbial communities in the detrital food web of North-East Pacific fjords.

In situ direct study of filtration and respiration rate of Mediterranean sponges = Estudio in situ de la filtración y la respiración de esponjas mediterráneas

This study focused on ecophysiology of five of the most prominent sponge species dwelling the coralligenous community in the NW Mediterranean Sea, and employed an energetic approach to understanding the complex interactions between physiological constrains and seasonal fluctuations of environmental factors experienced by the organism under natural conditions.

Dissolved carbon fixation by sponge–microbe consortia of deep water coral mounds in the northeastern Atlantic Ocean

Results suggest that sponge-associated chemoautotrophic/mixotrophic nitrifying prokaryotes may contribute to the observed CO2 assimilation by sponge-microbe consortia of H. thielei and R. nodastrella.

Natural Diet of Coral-Excavating Sponges Consists Mainly of Dissolved Organic Carbon (DOC)

It is hypothesized that excavating sponges may also benefit from an increasing production of more labile algal-derived DOC on reefs as a result of the ongoing coral-algal phase shift.

Intermittent Hypoxia and Prolonged Suboxia Measured In situ in a Marine Sponge

The results indicate that temporal micro-environments exist in the sponge at alternating locations, providing suitable conditions for the activity of its anaerobic microbial symbionts and suggests a complex and highly localized control of the holobiont’s metabolism.

In situ evidence for pre-capture qualitative selection in the tropical bivalve Lithophaga simplex

It is concluded that particle retention is not strictly size-dependent in L. simplex, and probably involves other cell attributes such as cell surface properties and/or motility.

Differential tolerance capacity of intertidal organisms (sponge and zoanthid) to the environmental stresses: Preliminary findings from a rockpool transplantation experiment

Marine intertidal organisms face extreme environmental fluctuations due to tidal cycles. To investigate the impact of environmental changes (high salinity, sea surface temperature, and anthropogenic



Natural diet and grazing rate of the temperate sponge Dysidea avara (Demospongiae, Dendroceratida) throughout an annual cycle

The results show the importance of particle type (size) for selective uptake in sponges, as well as the relevance of phytoplankton in the sponge diet.

In situ feeding and element removal in the symbiont‐bearing sponge Theonella swinhoei: Bulk DOC is the major source for carbon

The findings indicate that the role of DOC in metazoan nutrition and therole of metazoans in DOC cycling may have been grossly underestimated.

Patterns of glass sponge (Porifera, Hexactinellida) distribution in coastal waters of British Columbia, Canada

Glass sponges are enigmatic members of the deep-sea fauna that inhabit shallow waters in only a few locations world-wide. In order to understand what factors influence the distribution of glass

Sponge-mediated nitrification in tropical benthic communities

The results strongly suggest that sponge-mediated nitrification is not uncommon in tropical marine benthic communities, and might constitute a large input of oxidized nitrogen into those habitats in which sponges abound.

Partial Carbon and Energy Budgets of the Bacteriosponge Verohgia fistularis (Porifera: Demospongiae) in Barbados

The nutrient resource spectrum of Verongia fistularis and other bacteriosponges appears to be overwhelmingly dominated by dissolved organic matter, and thus contrasts strikingly with the present knowledge of nutrition in the normal non-bacteriosponge sponges.

Seasonal variation of in situ feeding rates by the temperate ascidian Halocynthia papillosa

The natural diet and prey capture rate of the temperate ascidian Halocynthia papillosa were studied in the field in a Western Mediterranean population and suggest that factors other than food availability determine the seasonal dynamics of the species.

Plankton availability and retention efficiencies of cold‐seep symbiotic mussels

Overall retention increased with increasing mussel size, though the largest mussels did not retain bacteria, and conservative estimates suggest that nitrogen obtained by filter feeding is similar to that acquired by symbionts and may be an important component in the nutritional requirements of seep mussels.

Discovery of a “Living Dinosaur”: Globally unique modern hexactinellid sponge reefs off British Columbia, Canada

SummaryGlobally unique hexactinellid sponge reefs occur on the continental shelf off British Columbia, Canada. They cover about 425 km2 of seafloor on the continental shelf off British Columbia