If P. caudatum and P. aurelia occupy the same niche, what...

If P. caudatum and P. aurelia occupy the same niche, what do you predict will happen when they are grown together in the mixed culture? The population density of one species will decline to zero or very low numbers. The carrying capacity of both species will expand so that the populations can continue to grow even though they share the same niche. Once food resources run out, one species will begin to feed on the other species. The population densities of both species will be similar to each other but lower than when either one is grown alone.

Transcript

00:01 Hello everyone, in this question we have been asked that in a situation where species a and b compete with each other for the same limited resources.

00:13 So here option a says that both the species benefit because of the natural selection.

00:21 So that is incorrect here because they are competing with each other that means they are not benefiting each other.

00:28 Then option b says one species outcompetes the other resulting in a benefit for one species and a negative effect on the other.

00:39 So according to gauss principle two species compete for the same resources that occupy the same niche results that one species outcompetes the other species.

00:50 Eventually the second species is eliminated or have the negative effect.

00:55 So that is why here our right answer is option b.

01:00 Then in the next question it says colonel's intermediate disturbance hypothesis predicts that all else being equal.

01:09 So option a says areas with moderate level of disturbance should have fewer species than areas with higher level of disturbance.

01:18 So that is incorrect here because the areas that have the moderate level of disturbance will have higher species because in that case they will not have much competition and also there will be much resources present.

01:32 Then option b says larger islands should have more species than smaller islands.

01:38 So this does not account for the disturbance hypothesis.

01:43 It is from the island theory.

01:45 Then option c says areas with moderate level of disturbance should have fewer species...

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