Infauna

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Related to Infaunal: Epifaunal, Epifauna, faunas

infauna

[in′fȯn·ə]
(zoology)
Aquatic animals which live in the bottom sediment of a body of water.

Infauna

 

animals dwelling in bottom sediments of seas, rivers, lakes, and ponds. They include many mollusks, echinoderms, segmented and round worms, insect larvae, some fishes, stone borers (some sponges, mollusks, sea urchins), and wood borers (the mollusk Teredo, some crustaceans). Infauna is categorized by the type of sediment in which it dwells: pelophilic (in ooze), psammophilic (in sand), lithophilic (in stones), and argillophilic (in clay). Most species of infauna feed on detritus. Certain forms of infauna carry out daily and seasonal vertical migrations. Infauna is important as a source of food for fishes that feed on bottom-dwelling animals (benthos).

References in periodicals archive ?
Seasonal variability of infaunal community structures in three areas of the North Sea under different environmental conditions.
Lastly, sites like Womens and Kalsin have finer sediments, which are likely to accumulate organic carbon and support a denser infaunal community than the other sites.
1999), and MacEachern and Gingras (2007), who suggested that these conditions characterize brackish-water trace fossil assemblages hy: 1) a low diversity; 2) domination by monospecific suites; 3) traces typically present in marine rather than freshwater environments; 4) a trend toward simple burrowing structures formed by opportunistic organisms; (5) sporadically distributed ichnogenera; and 6) infaunal traces predominating over epifaunal ones.
Population dynamics of an infaunal polychaete: the effect of predators and an adult-recruit interaction.
These borings are evidence of the ability of these infaunal worms to bore into the calcareous substrates, but they are presumably not specific to any kind of shells as the substratum.
Photoinduced toxicity of PAHs and alkylated PAHs to a marine infaunal amphiod (Rhepoxynius abronius).
In these instances, trophic shifts may be attributed to increased infaunal diversity associated with combined mud and shell substrate or to increased phytoplankton abundance from riverine inputs.
data), consistent with results obtained from studies on other infaunal bivalves (e.
Side muscle scars connect median muscle scars and they are in a similar position as accessory muscle scars in some Ordovician bivalves considered as infaunal burrowers (Babinka, Coxiconchia or Praenucula) (Fig.
Solen cylindraceus is an infaunal bivalve endemic to southern African estuaries, where it inhabits muddy and sandy sediments (Hodgson & de Villiers 1986; de Villiers et al.