BIOLOGY 2F03 Lecture Notes - Stingless Bee, Semibalanus Balanoides, Chthamalus Stellatus
Document Summary
Distribution of two barnacles within the intertidal zone. Balanus larvae settle throughout intertidal zone but survive to adults only below mean high neap tide chthamalus larvae settle in middle and upper zones but survive to adults mainly in upper zone. The two species of barnacles differ in ability to survive exposure to air. Barnacle mortality in the upper tidal zone. Warm weather and calm seas produced much higher mortality among. Balanus balanoides than among chthamalus stellatus in upper intertidal zone. Chthamalus survives longer in warm weather without wave spray. This explains why it remains in higher intertidal zones. But why is it missing from deeper locations: chapter 13. Does a pattern of distribution provide information on what individuals do. Pattern random: an individual has an equal probability of occurring anywhere in an area. Processes: neutral interactions between individuals and between individuals and local environment. Pattern regular individuals are uniformly spaced through the environment.
