Figure (a) below shows the percentage of rock cover occupied by three different species over four years. Figure (b) presents the results from four different manipulations and a control looking at the mechanism of competition. What are reasonable conclusions from this graph (hint there are two)?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
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Chapter1: The Human Body: An Orientation
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Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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 a- Removing live acorn barnacles stimulated the growth of macroalgae
b-  macroalgae dominated the occupation of the surface of rocks after four years and their success was greatly increased relative to controls when both barnacle species were removed.
c- acorn barnacle shells facilitate  algal density on rocks
d- acorn barnacles increase there coverage of rocks when little brown barnacles reach their highest density and seem to replace little brown barnacles on the rock during 1985
Figure (a) below shows the percentage of rock cover occupied by three different
species over four years.
Figure (b) presents the results from four different manipulations and a control looking
at the mechanism of competition.
What are reasonable conclusions from this graph (hint there are two)?
Rock cover (percent)
100%
(a)
Algal density
(individuals/10 cm²)
(b)
75
50
25
0
8
0
● Little brown barnacle
MJS N J M M J S NJ M M J S N
1983
1984
1985
S NJ M M JS N
1984
Acorn barnacle
1985
● Macroalgae
Empty acorn barnacle shells added
MM
1986
J
MM
1986
Little brown barnacles removed
Control
Acorn barnacles removed
Both species of barnacles removed
J
elyea, Ecology.
Transcribed Image Text:Figure (a) below shows the percentage of rock cover occupied by three different species over four years. Figure (b) presents the results from four different manipulations and a control looking at the mechanism of competition. What are reasonable conclusions from this graph (hint there are two)? Rock cover (percent) 100% (a) Algal density (individuals/10 cm²) (b) 75 50 25 0 8 0 ● Little brown barnacle MJS N J M M J S NJ M M J S N 1983 1984 1985 S NJ M M JS N 1984 Acorn barnacle 1985 ● Macroalgae Empty acorn barnacle shells added MM 1986 J MM 1986 Little brown barnacles removed Control Acorn barnacles removed Both species of barnacles removed J elyea, Ecology.
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