Friday, July 27, 2012

Lovells Island

Today, we embarked on our last field trip to Lovells Island. We came across a minor issue when no boats were departing the inner harbor due to the possibility of inclement weather. Thanks to Professor Berman, he was able to pull some strings and get us out to Lovells Island from Georges Island. Lovells Island is very beautiful. For me, it was great walking a sandy beach for a little, but it didn't last too long as we were soon walking along the rocky parts of the beach. Our task at hand was to observe the species in the tidal pools. We came across many of the same species we've identified at previous sites we'd visited. The only exception here is that the number of organisms and species were in greater numbers. The presence of hermit crabs and periwinkles were outstanding compared to the previous sites. Also, with regard to periwinkles we found a few much bigger than the ones we've been observing and the texture had also been different, the shells weren't as smooth as the normal ones we were used to observing. We also saw that the presence of barnacles and rock weed were much more prominent than we've ever seen on any other field trip we've been on.

As we continued to investigate the habitats along the beach, we came across a few snail shells on a rock on the beach. These shells were much different than any others we've ever seen. The shells were striped. What could these kind of snails be? Professor Berman informed us all that snails with striped shells are terrestrial snails, land snails. We came across a few, but the one we observed longer than the others had brown stripes. After further researching the type of snail it is, I concluded it could be a Helix Concava or Helix Supressa. It was kind of difficult to choose one because the characteristics are very similar. We were asked, well what the hell are they doing on the beach? Research led to the conclusion that predators who prey on this species typically drop the shells along the beach once they've killed.

No comments: