Answered: In a first experiment, the researchers…

Human Anatomy & Physiology (11th Edition)

11th Edition

ISBN:9780134580999

Author:Elaine N. Marieb, Katja N. Hoehn

Publisher:Elaine N. Marieb, Katja N. Hoehn

Chapter1: The Human Body: An Orientation

Section: Chapter Questions

Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...

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Question

A researcher was interested in models and mechanisms of succession in the rocky intertidal where disturbance is frequent. They observed that in newly bare rock space created by disturbance that two species of barnacles arrived first, followed by macroalgae. Limpets are an important herbivore of macroalgae. They were interested in how species interactions would affect succession. They conducted a series of experiments removing barnacles and/or limpets and examined algal abundance to be able to fill in the attached interaction diagram. See attached image

See second attached image for question

In a first experiment, the researchers created 6cm x 6cm plots with the following
treatments: control, and all barnacles removed. They measured macroalgal
density over time. Their results are in the attached figure. What model of
succession is supported by the data?
A.
ALGAL DENSITY
(inds./10 cm²)
1.6-
0.8-
MAY J 'M' 'M' J
1983
1984
O A. Inhibition
OB. Tolerance
O C. Facilitation
S
'N'
'M
1985
Control
Barnacle Removal
S 'N' J M M
1986

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