BiologyPS范文-organisms.PDF

Biology PS 范文 Written by Administrator Monday, 26 April 2010 15:13 - At a first glance one would say that the natural world is a peaceful place, relaxing to the eye. When viewed in more depth we discover that it is, in fact, a dangerous battlefield between living organisms. The Eurasian red squirrel (Sciurus vulgaris) and the eastern grey squirrel (Sciurus carolinesis) in Britain both fill a similar ecological niche; unfortunately the red squirrel is being out competed by its more successful grey cousin. It is these interactions and the behaviour in organisms that have fed my passion for Biology. Looking to widen my knowledge of Biology, I read ‘The Song of the Dodo’ by David Quammen. Although I thoroughly enjoyed it, I was angry that the actions of humans have had severe detrimental effects on populations of many species throughout the world, and in some cases we have become one of the main factors driving them to extinction. Even with this knowledge, we continue to do so at an alarming rate. It is estimated that between 24-100 species become extinct each day! This concern drove me to volunteer at Cannock Chase, a local Area of Outstanding Natural Beauty, and I became extremely interested in the area of Conservational Ecology. I helped repair fences, plant trees and learnt about the wildlife in the local area. Seeing the product of your hard work is a rewarding experience and has convinced me to participate in conservation work worldwide. I have become a member of the WWF and have been reading about current events within conservation work. The book also opened my eyes to an interesting new branch of Biology: Island Biogeography. It is incredible how even small expanses of water between islands could result in such huge variation between species on each area of land. In Geology lessons I have been studying trilobites and their adaptation; this led to an?interest in the theory of evolution as trilobite species varied enormously in a re