ZOL 353 Lecture Notes - Lecture 40: Kelp Forest, Coralline Algae, Intertidal Zone
Document Summary
Shallow coastal subtidal rocky reefs and kelp beds. Colonial vs. solitary invertebrate dominance: subtidal reefs are typically dominated by colonial animals, colonial bryozoans, hydroids, sponges, tunicates, also, solitary tunicates, bivalves, barnacles. Intertidal zone rocks dominated by individual animals: anemones, bivalves, barnacles, but this pattern does not always hold, e. g. in maine, mussels and anemones dominant in rocky subtidal. Trophic cascade in new england started by cod fishing. In gulf of maine, cod and other large predatory fish formerly abundant: evidence from native american middens bolsters fisheries stories and records, lobster and crab were uncommon, controlled by cod and the. Change in fisheries take of cod from the western. Atlantic: probably due to whipping around of kelp and predation or urchin juveniles by crabs and amphipods. The life cycle of a typical kelp of the genus laminaria: sea otters are keystone species for north pacific kelp forests, but many kelp forests naturally lack sea otters.
