Monday, August 3, 2009

Lovells Island

Date: August 2, 2009
Temp: App. 80 degrees

Our second day on the ocean was to an Island called Lovells Island. We departed Boston Harbor at about 9:40am and we made our first stop at Georges Island. From Georges Island we took a water taxi to Lovells Island. At Lovells Island, we met two guards who explained the nature of the island and how the shape looks like. One of the guards explained that the island looks like a "ram". From there we continued our trip to a beach called Cobble beach still on Lovells Island. There were a hole lot of rocks on that beach and Bruce explained to the class that there are different kinds of beaches. Cobble beach was basically a rocky beach and Bruce used the term "Brazil nut phenomenon" to explain how the rocks were laying on each other. We saw that bigger rocks were on top and smaller rocks beneath. We discovered that there were really huge rocks but we can into conclusion that those huge rocks were man made and Bruce explained that those rocks are used to prevent storms from destroying the island.At the beach, we gathered different kinds of shells and we discovered that some of the shells had holes drilled in them. We gathered a lot of periwinkles and also we found some live ones. Most of the live ones looked alseep but Bruce told us to sing to them so that they stay awake.Some periwinkles really responded to the sweet melody of some of us and we got the chance to see the live periwinkle moving from its shell.
One of the students found a strange periwinkle at the shore and me and two other students can into a conclusion that that periwinkle was an invasive creature. We discovered that it was Chink snail with the scientific name"Lacuna Vincta".
Now we were left with that question of what made the holes in the periwinkle. We discovered that star fish eats snail and mussels so i think that these predators such as crabs, and star fish can be attributed to the holes drilled in these periwinkle.
From the cobble beach, we moved to a salty and marshy area and we were told that some plants on that area are considered invassive. We pulled out a plant called Pepper weed and we were told that that plant is invassive. We then moved to the tidepool catch green crabs. We found alot of green crabs under rocks near the shore of the ocean. We then moved back to an area where we were supposed to be looking for black berries but one of the students found a snail shell, so our mission of looking for black berries changed into looking for snails. We found both dead and live snails and most live snails were on trees while that dead ones were laying on the floor. We then moved back to the tidepool to find some lobsters. Interestingly, the group I was working with kept moving a liitle deeper into the ocean and we caught a big lobster.
At the end of our discovery, we gathered all the snails and we discovered that the snails had different patterns and different colors. We were asked to answer why the snails have different patterns. My observation was that the dead snails had brownish patterns and the live ones had yellow colors. The differences in the patterns can be attributed to the habitat of these snails. Different snails from different habitats have different colors and different patterns. These patterns on the different snails somehow helps them to hide from their predators. One of the snails that i observed is believed to be "Cinammon roll". We then headed back to Boston at around 3:45pm.
Samuel Appiah

No comments: