PL 2a Estimating Population Size and Dispersion F2018 ign Layout References Mail
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PL 2a Estimating Population Size and Dispersion F2018 ign Layout References Mailings Review View Help Tell me what you want to do Normal 1NoSpac.. Heading 1 Heading2 Title Font Paragraph Styles 1. Why are plants generally harder to sample than animals, like squirrels or pillbugs? Briefly explain. (2pts) 2. What is a quadrat and why is it useful for sampling populations? (2pts) briefly explain why each pattern arises in that species. (You may have to do a bit of added research outside of textbook examples) (3pts) 3. What are the three dispersion patterns- provide an example organism for each one, and bRandom Dispersion Aggregated Dispersion c) ish (United StatestExplanation / Answer
It is difficult to sample animals a these are mobile and can`t stay in one place for long unless captivated but plant sampling is easy as they remain at the same place forever.
In the quadrant method, a series of squares (quadrats) of a set size are placed in a habitat of interest and the species within those quadrants are identified and recorded. sampling can be done either by hand i,e by sorting each quadrant or by taking photographs of every quadrant for future analysis. Abundances of organisms found at the study site can be calculated using the number found per quadrat and the size of the quadrat area.
3. There are three main types of dispersion: clumped, uniform and random.
Clumped dispersion- In this type of dispersion, individuals in question re clumped together with other individuals of different species. Thus some patches may have many individuals and some patches may not have those individuals at all. This is also called as aggregated dispersion.For example elephants
Uniform dispersion- here the distribution of individuals is quite even i,e they are equally spaced. For example, territorial birds like penguins have a uniform dispersion pattern.
Random dispersion- There is no apparent pattern in the distribution of individuals. Plants with wind-dispersed seeds, such as dandelions, are usually distributed randomly.
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