Sunday, November 12, 2017

Hawaii - Primary or secondary succession?

Today in my environmental science class we learned about ecological succession. It was interesting to learn about ecological succession. Ecological succession is a gradual process of change and replacement of some or all the species in a community. Also, it can be classified as 2 type which is primary succession and secondary succession. Primary succession is the series of changes that occur in an area where no ecosystem previously existed. In other word, there were no soil but just rock and ash. However when time passes, the rock breaks and create soil and plants start to grow. However it would take a lot of time. On the other hand, secondary succession is when a community is partially or completely destroyed by a natural or a human- caused disaster, another community eventually takes its place. Secondary succession restores the ecosystem to be stable which can be maintained.

Understanding these concepts, I started to wonder if Hawaii should be classified as primary succession or secondary succession. Last week, I went to Hawaii and I was thought that Hawaii was formed after a volcanic eruption. After my research, I understood that Hawaii is classified as primary succession. This is due tot the fact that after a volcanic eruption, the surface of ground were covered by rock and ash. After that, lichens and moss which are called pioneer species appeared  at that place. Then grasses could grow where soils were created. Eventually, trees and shrubs were able to grow and now there is beautiful island like Hawaii. So, I can conclude that Hawaii is island where it can be classified as primary succession. By doing this blog, I could clearly understand the concept of ecological succession.

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