Artificial Tidepool #13





			TIDEPOOL # 13 Peg #5

This artificial pool was made under permit by Mike Slater and Garry Fletcher in June, 1999. It is part of a long range succession study. See below for AFTER the HURRICANE
	The rockwork done to seal the southern entrance	Observing the action of wter as a surge fills the pool.

			Students surveying the pool.

A panorama of the pool before water filled it. The white quadrat is 50cm on each side.


In May of 2005 the tidepool has a number of invertebrate inhabitants	A view from above looking seaward.

Observations, June, 05	(Artificial) tidepool #13

A view of the whole pool from above.	Limpets graze on the algal growth on the flat bottom	On the West side, the pink encrusting algae *Lithothamnion* grow	The purple shore crab hangs onto a ledge on the West side. just below the surface.

On the South wall finger limpets are in their same location as before the pool was built.	The North and West side of the pool	*Californianus* mussels	On the bottom corner agroup of Californianus mussels has established a foothold.

			A tidepool sculpin sticks his head out from under the ledge beside the rock-concrete wall

AFTER THE HURRICANE OF DECEMBER 15, 2006

We were very surprized the first time in January when we went to have a look at the artificial tide pool. It was essentially ...not there anymore. The storm had moved around 5-20 ton boulders on the West shore of Great Race Rocks,and the pool was now completely covered by the huge boulder which had been on the East side of it. Rocks around the pool were moved also. We are still trying to figure out all the changes. . " Geological Change isn't often so obvious!" Below are some pictures of the present configuration. When we get the time,we will clear the large rocks out of the pool and try to recover at least a part of it, although It is now completly shaded by the large boulder.


Before the hurrricane, viewed from the north side, it appeared as above. The large rock on the left side of the picture was moved....	..and after the huuricane, it sits on top of the tidepool.and completly covers the pool	Viewed from the South side,	Looking at the South West corner of it. The large square rock that used to be on the ocean side of the boulder is now gone completely.

This is the space previously occupied by the smaller seaward boulder.	The same view below the large boulder, with students Mujahed,Anitesh and Kip.	Anitesh and Kip stand where the boulder once was sitting,	Jack Knox stands on the east side of the rock in the middle of where it where it used to be sitting.

The boulder perches directly over the pool resting against the concrete dam built on the west side of the pool and a small rock directly underneath.	The stone wall we had built on the south side is still stabding	The tidepool now, in under the boulder. It is also fillled with large rock	These large boulders up the shore from the tidepool have also moved 2 to 3 meters.

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