Anyone that does OCR AS/A level Biology (or even AQA or Edexcel) I have three urgent questions on biodiversity!!
1) Why would a field that was grazed absorb less water than a field that was mowed?
2) What is the difference between a field shaded by trees and one not shaded?(if the answer is grass,why is that?)
3)In a table showing 10 coordinates and a value fpr species richness for eaxh obtained by sampling (e.g at coordinates 3,9 species richness is 5, so 5 different species inthat quadrat) WHY are the mean results (so all 10 species richness values divided by 10) NOT reliable??
Thank so so much!!
If you only know one answer that's fine!