seaweed | Race Rocks Ecological Reserve-

Wind: yesterday 2-42 knots variable directions, today 0-31 knots from N in am and W in pm
Sea State: yesterday chop up to 1 m, today rippled then up to 1 m chop in afternoon
Visibility: yesterday 10 NM, today 5-15 NM
Sky: yesterday clear, today partly cloudy and rain in afternoon
Temperature: yesterday 5-10 °C, today 5-9 °C
Atmospheric CO2: 413.05 ppm (recorded by NOAA at Mauna Loa Observatory, Hawaii)

The tide has been getting low in the evenings over the past two days, revealing lots of neat intertidal creatures. With no sea lions hanging out on the east side of the island, I was able to explore the rocky shoreline to see feather duster worms, sea stars, barnacles, surf grass, many types of seaweeds and long ago discarded metal pieces from former buildings and equipment at the lightstation that only reveal themselves at low tide.

There are six very stationary elephant seals on the island: one adult female, two adult males, two female pups and one male pup.

Today, I drained the cistern which stores the seawater before it gets treated by the desalinator. The cistern is a large concrete box located between the lighthouse and the main residence. It measures 12 m long by 8 m wide by 3 m deep. It holds a lot of water. The water was slightly turbid and causing the desalinator pre-filters to work harder than needed. The water pump ran for four hours to drain the many thousands of litres of water back into the ocean. I used a long pressure washing wand to reach in to clean the rocks on the bottom and concrete walls, at least the parts I could reach. Tomorrow, I will refill the cistern when the tide is higher and the intake hose can be put off the end of the jetty.

Yesterday morning, six visitors came to the island: Travis, Hilary, Antoine, Hannah, Val and Greg. There was one tour boat that passed by. Today, two tour boats were in the ecological reserve in the morning.

: Sea captain Travis bringing visitors to Race Rocks in Pearson’s boat Second Nature.

: Northern feather duster worms at low tide near the east bay.

: Fire pump and hoses to drain the cistern, which is the size of the flat surface seen in the photo and a depth of 3 m.

: A view inside the almost drained cistern.

Weather and Sea Conditions

After a hesitant start, with locally overcast skies and fog to the southeast, the sun was blazing by afternoon and it stayed that way into the evening. The UV index rose to almost 6 today, which is high. The wind started at 15 to 20 knots from the west, dropped and turned to the south and southeast and then returned to west15 to 20 knots by early evening. The barometric pressure stayed fairly steady between 1005 and 1010 hPa. The forecast calls for the westerly to increase to 15 to 20 early this evening and to 20 to 30 late this evening, then to drop to 5 to 15 knots late overnight. They expect a similar wind pattern tomorrow with more cloud.

Vessel Observations

Seven whale watching vessels were documented working in the protected area today and most followed the rules. One yellow zodiac exited past West Rock heading west, at high speed. Better communication is needed about boundaries, limits and a reminder about keeping at least 100 meters away from marine mammals might be helpful. I know these ecotourism operators want this good thing to last.

Ecological and General Observations

A nice low tide this morning exposed all the beautiful new seaweeds of the season. Bull kelp is growing fast and the Mazzaella splendens is a rich, iridescent burgundy colour. Fresh kelps like Alaria, Laminaria and Cymathere triplicata festoon the rocks in the lower intertidal areas. Up high, the more ephemeral species of nori and sea lettuce are starting to go reproductive and lose their ‘bloom’.

A high density of grazers, keeps the seaweeds in check and feeds the gulls and oystercatchers.

More elephant seals arrived today bringing the number moulting in the garden to eight. On land they are the epitome of lethargic. It is a real treat to watch them in the water, they are so graceful and languid as they chase and roll and spin in slow motion. I also see the River Otter and Sea Otter daily, which is always interesting. The Sea Otter hung out with the Harbour Seals today while they were hauled out on South Rocks. He just floated a couple of metres away as they slept on the rock. He dozed in the water, using the back eddies to stay close. Later he positioned himself in a back eddy that kept him almost stationary, while meters away the current that blasted past at almost six knots. Very savvy sea otter.

There were a lot of shorebirds today, about fifty Surfbirds, a few Rock Sandpipers and a couple of Dunlin. The Black Turnstone numbers are swelling too so I think the migration is happening. The turnstones I watched foraging seemed voracious.