On 10 October 2012, B block marine scientists went down to the Pearson College dock and checked on the substrates that they had suspended in the water on 7 September 2012.
After a month there have been some changes:
September
A bleach bottle is now covered in benthic diatoms:
October
So is the piece of cinder block:
September
October
And a glass jar:
September
October
The “Kraken” bottle is covered in diatoms too:
September
October
And it is home to at least one dock shrimp:
The tire also housed several shrimp (the photos didn’t turn out though, sorry!)
And the substrate below…
…had a crescent gunnel living between the bottle and the mesh covering.
Pearson College Marine Science 