Ecological Niche of Rocky Shore Organisms ! Use ultranet resources, digital textbook, or internet to complete the table below. You need to know this information when writing up a/s 91158. The WHELK has been done for you. Adaptations for: (1-4) Organism Habitat Movement Feeding Sensing Other Activity Necklace weed Low water Sways with photsynthesi Beads excrete Food source mark & on water s eggs/sperm at for sea rocks same time in urchins, day for crustaceans, fertilisation some fish Black nerita Near water Moves very scrapes Nerita on rocks/ slowly over algae from melanotragus rocks while rocks feeding Topshell (any) ? Oyster borer Barnacle from oyster Bore’s areas of to barnacle through rocky shore etc. oyster shell to eat the oyster Low water mark Muscular “foot” Sharp edge of Siphon extends Eggs for Carnivorous Whelk (any) & on rocks to grip & move shell to open & to sense reproduction scavenger & drill holes chemicals hunter of other molluscs & worms Catseye Placement move by Feed on The ! ranges stretching Coralline operculum around the their body and (mouth seal) rocky shore and sliding Neptune’s closes when a along a trail necklace predator or a of mucous big wave that they approaches secrete to reduce friction. Limpet (any) Anywhere muscular Graze on Keep a ! on rocky foot grab algae when ‘home’ and shore holds on tide is high move back very strongly after tide pushes them around Chiton (any) It lives at slowly move Feed on Chitons in the ! mid-tide with algae, genus level and muscular sponges etc. Placiphorella below on foot off rocks have adopted intertidal a unique rocks, living carnivorous in cracks feeding and crevices. method by using the expanded front of the girdle to trap small crustaceans and other invertebrates. Barnacle (any) Live on any Usually Barnacles can detect The barnacles ! rock on the don’t move are their adults reproduce shore, more after being suspension by chemical sexually, and likely to be ‘locked’ in feeders, means. produce little seen on low gathering nauplius tide mark to small food larvae which be into their disperse in underwater mouth with the plankton. often. their 'feet'. Rock oyster They are Adults live They eat Sydney Rock Their ! usually attached on phytoplankt Oysters predators are found in the the rocks. on, change sex birds, fish intertidal zooplankton, during their (e..g bream), zone to 3 bacteria and lifetime. They stingrays, metres organic start out as octopus, mud below the matter by males and crabs, whelks low water filtering later change and sea stars. mark. water into to females. their shells and straining the micro- organims out. Periwinkles Found in Periwinkles Primarily an All species in ! intertidal are sea algae grazer, the zone. Often snails, and but will feed Littorinidae found in tide so slowly on small are important pools. move around invertebrates as a favourite while such as food of many feeding. barnacle shore birds, larvae. particularly ducks..