birddiversityandhabitat-資料下載頁
2025-07-15 17:50本頁面
【正文】 equations used: H1= (nlogn ∑ f1log f1) / n varH = (∑ f1log2 f1 –(∑ f1log f1)2 / n) / n2 t = H1 – H2 / (√ var H1 + var H2 ) *t – to determine if two values you obtain for the index are significantly different you can use the ttest df = (varH1 + var H2 )2 / ((varH1)2 / n1 + (var H2) 2 / n2 ) _________________________________ Sample Calculation for Pigeons: H1= (23log23 ∑ 19log 19) / 23 = .3054 varH1 = (∑19log2 19–(∑ 19log 19)2 / 23) / 232 = .0102 H2= (23log23 ∑ 4log 4) / 23 = varH2 = (∑4log2 4–(∑ 4log 4)2 / 23) / 232 = .0022 t = .3054 – / (√ .0102 + .0022 ) = df=(.0102 + .0022 )2/((.0102)2/19+(.0022) 2/4 )= t therefore we reject the null hypothesis Conclusion ? Due to our findings we must reject our null hypothesis. ? We have observed that a greater number of bird species can be found outside the city, Catalina’s, than within the city, UofA. Conclusion Continued… ? Possible Error: ? More than one person observing sights. ? Counting same bird twice ? How could the experiment be improved? ? Focus on one species ? Choose more locations ? Longer observation periods and more days ? Tag Birds Conclusion ? Our experiment has shown that humans have a definite impact on the habitation of birds. ? This information could help save bird, and other, species from human encroachment and stop developers from pushing housing farther into the Catalina’s. Resources ? We used a couple websites including: ? Diet ? ? ? rd=Greater%20roadrunner The End
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