S2 Marine Habitats & Food Chains
While the rest of the school was away, S2 had the opportunity to explore Gairloch’s beaches with Dr Close and Mr Peter Cunningham last Thursday afternoon and Friday morning.
We conducted a sampling survey of the sand on both beaches and are hoping to find out if there are micro-plastics in the sand.
Thursday saw Mr Cunningham electro fishing the Achtercairn Burn with several trout and eels being caught as well as some small plaice closer to the beach.
On Friday we investigated the Marine Food chain on Gairloch’s main beach first by using a Plankton net to catch Phytoplankton and Zoo plankton which eat them, then by looking for filter feeding worms which eat the plankton by digging in the sand, followed by using two sweep nets to try to catch the fish and marine invertebrates which feed on the worms and also the plankton.
Lastly Mr Ian McWhinney brought his fishing boat over to the beach and came ashore with a variety of the predators of the small fish we caught in the sweep nets.