Figure 1. Chi Square Test for Niche lab conducted at Owings Mills North.Behaivors of several species of birds (Tufted titmouse, dark eyed junco, black-capped chickadee, northern cardinal, mourning dove, purple finch, house sparrow, and white breasted nuthatch) were observed at feeding station. The three possible behaviors are feeding at the feeder, feeding on the ground, or feeding in the tree.
Assignment questions 1-4
Given the results of the chi square, the birds feeding behavior are not the same.The birds are acting randomly when it comes to behaviors at the feeding stations. The chi square at 14 degree of freedom equals 49.99 , with the probability set at 0.05, the chi-square was bigger than the critical value. This data rejects the null hypothesis which states that there will be no significant difference between the observed and expected portions of birds at the feeding stations. So, rejecting the null hypothesis that there is no difference in the observed and the expected in favor of the alternative hypothesis that there is a significant difference .
The three species that …show more content…
Birds can go to find insects, this can lead to competitive exclusion. Two species competing in same niches, one will drive out the other. Another way birds might partition natural source of food is by having different beak sizes, this cn lead to speciation.
If species began to use different habitats within the same area, assuming that one area has the species that feeds on bigger seeds and the other areas has the species that feed on the smaller seeds. Speciation may occur due to genetic isolation , which will cause lack of gene flow. Then divergence from each other may occur due to speciation. Similar to the mockingbird species on the Galapagos island, they differ in traits though they share a common ancestor. The genetic isolation and genetic divergence this leads to
Assignment questions 1-4
Given the results of the chi square, the birds feeding behavior are not the same.The birds are acting randomly when it comes to behaviors at the feeding stations. The chi square at 14 degree of freedom equals 49.99 , with the probability set at 0.05, the chi-square was bigger than the critical value. This data rejects the null hypothesis which states that there will be no significant difference between the observed and expected portions of birds at the feeding stations. So, rejecting the null hypothesis that there is no difference in the observed and the expected in favor of the alternative hypothesis that there is a significant difference .
The three species that …show more content…
Birds can go to find insects, this can lead to competitive exclusion. Two species competing in same niches, one will drive out the other. Another way birds might partition natural source of food is by having different beak sizes, this cn lead to speciation.
If species began to use different habitats within the same area, assuming that one area has the species that feeds on bigger seeds and the other areas has the species that feed on the smaller seeds. Speciation may occur due to genetic isolation , which will cause lack of gene flow. Then divergence from each other may occur due to speciation. Similar to the mockingbird species on the Galapagos island, they differ in traits though they share a common ancestor. The genetic isolation and genetic divergence this leads to