OCR biological diversity 2017 exam paper walk-through: question 16 on sampling and conservation

Walk-through of OCR Biology A level Biology A, H420, Biological diversity (paper 2) 2017 series. The aim is to see how questions connect to the expected answers, to better understand the expectations of future questions. This one covers question 16 on ecological sampling and conservation.

I am not by any means the ultimate authority on this, just sharing my views in the hope that it sheds light on the subject for you. Please do leave questions and views in the comments section and I also hope this will stimulate some constructive discussions between you all, as well, and that you are able to help each other out on your collective journey through A-level biology.