Problem Set 5-Competition & Predation Complete the problems below, scan your fin

Question

Problem Set 5-Competition & Predation Complete the problems below, scan your finished assignments and submit to Canvas as a single PDF file with the same naming format as all of your other Problem Sets. PART 1-Competition 1. The ability of two competing species (species 1 and species 2) to coexist in the same area and time depends on their respective competition coefficients (?2+1 ?1-2) and carrying capacities (K: and K2). For the various conditions listed below, determine whether or not both species 1 and species 2 could invade an environment in which the other species already existed at or near its carrying capacity. You can use either phase state graphs or the table of inequalities given in lecture to make these determinations K2 1.0 100 Sescies 1 mvades2 40 160 0.1 0.1 0.1 0.1 40 100 160 40 100 40 160 0.9 0.9 0.9 0.9 0.9 0.9 100 160 40 100 40 160 0.1 0.1 0.1 0.9 0.9 0.9 100 160 40 100 40 160 0.9 0.9 0.9 0.1 0.1 0.1 2. Distinguish between 'interference competition' and 'exploitative competition' and give a biological example of each.

Explanation / Answer

1) K1 and K2 are the carrying capacities of the habitat for each species.

alpha is the effect of species 1 on the growth of species 2 and beta is the effect of species 2 on the growth of species 1

i) Both species will coexist

ii) Species 1 will invade and will exclude species 2

iii) Species 2 will invade and will exclude species1

iv) Both species will coexist

v) Species 1 will invade and will exclude species 2

vi) Species 2 will invade and will exclude species1

vii) Species 1 will invade and will exclude species 2

viii) Species 1 will invade and will exclude species 2

ix) Species 1 will invade and will exclude species 2

x) Species 2 will invade and will exclude species 1

xi) Species 2 will invade and will exclude species 1

xii) Species 2 will invade and will exclude species 1

2) Interspecific competition occurs between individuals of two different species occuring in a habitat. It is of two types -

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