Marine protected areas(MPAs), what Kelleher and Kenchington from IUCN mentioned in 1992 has become the most commonly used definition of MPAs, “Any area of inter-tidal or sub-tidal terrain, together with its overlying water and associated ﬂora, fauna, historical, or cultural features, which has been reserved by law or other effective means to protect part or all of the enclosed environment.” (Kelleher and Kenchington, 1992). The role of marine protected areas is always controversial because of the dispute at whether “no take” or not. Some people think “no take” can protect diversity, abundance and average size of fish, while others think it may has adverse affect on marine industry. In this essay, there are 3 sections to this topic, the direct benefits of marine protected areas is the first, reasons why some fishers do not support designation of MPAs is the second, a personal judgement on MPAs based on research is the final. The purpose of this essay is to discuss the roles of the MPAs and to trade off benefits and negative effects.
Direct benefits of MPAs
2.1 biological diversity
S Chape and more thought MPAs are “a valid and measurable indicator of progress in conserving the world's remaining biodiversity, or at least slowing the rate of loss.” (S chape al, nd). MPAs can be managed as strict nature reserves, national parks, community conserved areas or managed resource areas in order to protect biological diversity. 2.2 Fisheries
“Management with MPAs by definition involves fishing rates that vary over space, thus increasing the importance of spatial aspects of the spatio-temporal dynamics of marine populations.”(Louis W al, 2009) 2.3 Science &Education
MPAs can be a science laboratory for experts and students as well as an education base for every people. Wide variety kinds of sea animals in MPAs can be used to do a lot of experiments and researches of habit of life. 2.4...