July 13 and 14 – Weekly Census

Ecological Notes:

  • The sea lion population is growing. For the past few days there have been 18 Steller sea lions hauled out on Middle Rocks. That is up from four sea lions one week ago. One of the sea lions has a brand. It appears to say 620R, although the researcher I contacted in Oregon mentioned it is what they call a bad brand and he was unable to determine the brand from the photos I sent. I will keep a look out for the sea lion and see if I can get a better view. The researcher will check his records to see if he can identify the sea lion and be able to record the resighting.
  • The super moon on Wednesday night rose in the southeast at 10:00pm. It was a big bright orange orb that looked more like the rising sun, than the moon.
  • Today’s extremely low tide of -0.2m or -0.7′ was at 10:13am. The overnight high tide at 00:55am was 3.0m or 9.8′. It is apparently the lowest tide in a decade. I was fascinated to see the extended edge of the water all around the many islands. I looked at the exposed intertidal zone from a distance and up on the jetty, so as not to disturb the many delicate species.
  • See the photo gallery below for more ecological happenings from the past two days.

Weekly Census Results from July 13:

  • Steller/Northern sea lions: 18
  • Sea otter: 1
  • Harbour seals: 133
  • Bald eagles: 2 (1 juvenile and 1 adult)
  • Canada geese: 9 (5 adults, 4 goslings)
  • Black oystercatchers: 11 (8 adults, 3 chicks)
  • Cormorant: 4
  • Glaucous-winged gulls nesting on the main island: 247
  • Glaucous-winged gull chicks: approximately 200 (it is hard to get an exact number due to their camouflage in the grass and hiding under their parents)
  • Gulls not nesting (some glaucous-winged and some other species) on the south end of the main island and outer islands: 96
  • Pigeon guillemots: 142
  • Black turnstones: 2
  • Western sandpiper: 2

Weather:

  • Yesterday (July 13):
    • Sky: Part Cloudy
    • Wind: W 12-32 kts
    • Sea: rippled, then up to 3′ waves in afternoon and evening
    • Temperature Low 12oC, High 16oC
  • Today (July 14):
    • Sky: Part Cloudy
    • Wind: W 15-27 kts
    • Sea: rippled, then up to 2′ chop in afternoon
    • Temperature Low 11oC, High 13oC

Visitors:

  • No visitors

Facility Work:

  • Scrubbed and squeegeed solar panels, routine tidying and checking infrastructure around the island.

Vessel Traffic:

  • Many Canadian and American ecotour boats have been nearby and heading through the waters of the ecological reserve.

Here are photo highlights from the past two days. Click on the photos for larger views and captions.

March 4 and 5

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.

March 24 – Sea Otter

Sunny, patches of rain the afternoon
Wind: W 4-17 knots, calm in the late evening
Air Temperature: Low 7.7°C, High 10.7°C
Ocean Temperature: 8.9°C

This afternoon, a ring-necked california sea lion was observed on the South Islands. It had something tightly wrapped around its neck, which is digging into the flesh.

While observing the sea lions, a small creature appeared on the edge of the rock ten metres away from them. Much smaller than the sea lions, at about one metre long, it was eating the molluscs in the intertidal zone. To my great excitement, it was a sea otter (enhydra lutris). The sea otter ate, dove, rolled and swam around the South Islands for about two hours.

Phyllospadix scouleri: surf grass– Race Rocks taxonomy


Domain: Eukarya
Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Monocots
Order: Alismatales
Family: Zosteraceae
Genus: Phyllospadix
Species: P. scouleri
Binomial name
Phyllospadix scouleri

Genus/species Phyllospadix scouleri (Hooker)

 

Description: This flowering plant is most characteristic of the open rocky shores of the coast that are exposed to the full force of the waves, as on the west coast of Vancouver Island.  There it forms bright emerald-green beds on the rocks near extreme low-tide level.  The plants are relatively short, usually not more than a metre in length, and the leaves are 20-32 mm. wide.  Short basal flowering stems are produced, which are 5-8 cm. long.

Habitat:  On rocks in the lower intertidal and upper subtidal zones.

Pacific Coast Distribution:  Alaska to Mexico.

Robert Scagel, 1972

 
taxonomyiconReturn to the Race Rocks Taxonomy
and Image File
pearsonlogo2_f2The Race Rocks taxonomy is a collaborative venture originally started with the Biology and Environmental Systems students of Lester Pearson College UWC. It now also has contributions added by Faculty, Staff, Volunteers and Observers on the remote control webcams. March 8 2009- Ryan Murphy