Feeding Flashcards
(7 cards)
Describe direct deposit feeding with examples
Direct deposit feeders obtain nutrients from sediment in soft bottom habitats like bacteria, algae or POM, they are non selective and swallow large amounts of sediment directly and excrete what is not needed. Many polychaete or echinoderms eat like this.
Describe suspension feeding with examples.
- Suspension feeders remove particles suspended in the
water column - Particles include phytoplankton, zooplankton, bacteria,
detritus - Either through trapping or filtering water
- Suspension feeding most common mode of feeding:
Occurs in sponges, ascidians, appenducularians,
brachiopods, ectoprocts, entoprocts, phoronids,
most bivalves, many crustaceans, polychaetes and
gastropods
Describe herbivory/grazing with examples
Grazing is also called macroherbivory and is biting and chewing things like seaweed, molluscs and arthropods do this and they usually have some sort of teeth.
Explain how suspension feeding relates to pelagic benthic coupling
Coupling porcutivity in the water column and they introduce it into the seafloor, filtering water introduces energy and carbon.
Explain how detritivores/deposit feeders relate to bioturbation
What they excrete is called clean dirt, they also help with nutrient cycling and redistributing organic matter.
Describe indirect deposit feeding with examples.
Selective/Indirect deposit feeders have specialised feeding structures like tentacles or probiscus to sort and move particles to their mouth and usually only feed on upper sediment layers and capture higher proportion of living matter (bacteria, diatoms, protozoans). An example is polychaete.
Describe carnivory with examples.
- Requires ability to detect prey efficiently
- Marine invertebrates primarily rely on Chemosensory
perception of prey - Chemoreceptors equally distributed in radial animals but in
the head in cephalised animals
