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barnacle ditribution

Discussion of the distribution and abundance of living organisms and how these properties are affected by interactions between the organisms and their environment

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barnacle ditribution

Postby missy42 » Fri May 01, 2009 6:35 pm

Can anybody help me with this questions? Thank you :roll:

1.Let’s say that you set up 3 preliminary treatments in your barnacle distribution study. The first involves removing B. balanoides from the community, the second involves removing C. stellatus from the community, and for the third you leave the community as you found it. What biotic factor is being tested?

a. intraspecies competition
b. both intra and interspecies competition
c. rate of growth
d. interspecies competition
e. season of growth

2.Which abiotic factor in the distribution and diversity of barnacles would you consider intermittent?

a. space
b. intraspecies competition
c. sea star predation
d. exposure to air or saline
e. interspecies competition

3.As barnacles, what biological role(s) do B balanoides and C. stellatus play in the biological community?

a. predator
b. keystone species
c. biotic, predator and prey
d. biotic prey
e. prey
f. biotic factor
g. biotic predator

4.Connell removed C. Stellatus from higher intertidal zones and transplanted them to lower intertidal zones. He then measured the distribution of C. stellatus. What is the distribution of C. stellatus?

a. independent variable
b. dependent variable
c. experimental control
d. standardized or controlled variable
e. Experimental treatment
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Postby canalon » Sun May 03, 2009 12:25 am

So what do you think? And why? We then might be able to help you out.
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Postby bellasky » Sun May 03, 2009 7:13 pm

Can anyone really answer this quesiton please Good quote, but it does not answer the question!
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Postby canalon » Mon May 04, 2009 2:03 am

Have you read the Rules and the thread at the top of each forum about questions and homework?
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Re: barnacle ditribution

Postby Zach » Tue Jul 07, 2009 2:55 pm

This is an old question, so I guess I can take a whack at it.

1: D. Interspecific interaction

By removing species A, and keeping species B, and vice versa, you are looking at what effect that the absence of one species will have on another. The normal two species population is the control.

2: D. exposure to air or saline

Since I might only consider A and D ABIOTIC factors, I might assume that the amount of exposure to air/saline might be the most obvious and influential intermittent factor that would creature different niche parameters that a single taxon may or may not benefit from (further affecting speciation, biogeography, and ecology/behavior).

3: B: Keystone species

I do not know anything about barnacles, but I might assume they represent a keystone species in some ocean communities. Perhaps playing a role in nutrient cycling and water chemistry.

4: E. Experimental Treatment

I should know this one, I know it is very basic. Though I might consider this an experimental control.

Sorry, I'm a bio major and plan to publish a few papers this year. Never even had a bio course, so I still have a lot to learn.

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