Daily Archives: Thursday,April 21, 2022

Race Rocks is a sanctuary

Posted on by

I arrived on Tuesday April 19. I had the good fortune to arrive with Garry Fletcher and get a quick tour of the island. We found the Romanzoffia (Mist Maiden) in bloom. Derek had done a great job getting the house ready for transfer.

My first full day here the winds were E/NE up to 40 knots. Therefore it was quiet in terms of ecotourism. I wandered around familiarizing myself with the (currently) 7 elephant seals, the Canada geese nests and the sea lions all sharing the island with me.

Today (April 21) the weather has changed. Wind currently west. Sea calm.

Visitors: The Pearson College second year marine biology class are celebrating their last class today and visited the island for 2 hours. Greg was kind enough to trouble shoot a few things with me and we also had time (and bravery) to addle 3 eggs in a goose nest next to the gasoline shed. I made a map of nests so we can keep track of which eggs we have disturbed.

Four ecotourism boats have moved through the reserve today. It is such a wonderful thing to observe how respectful they are.  The presence of guardians seems to have made a big difference.

Observations

Yesterday during the storm there were 2 Dunlins (I believe). I will include a very poor picture. I saw them several times close to and moving with the turnstones on the grass.

Today was a fantastic low tide. Last year I was here after the “heat dome” and the intertidal was burnt. Today it was so lush. Beautiful abundant seaweed, I will try and edit this post with the new names, Hedophyllum, Alaria, Costaria, Iridea ,Halosaccion beautifully shiny and underneath pink coralline algae, bright orange Cucumaria, tunicates and sea anemones. Abundant goose neck barnacles.  Even a gumboot chiton (Cryptochiton stelleri).  Oyster Catchers, Turnstones, Harlequin ducks all making their presence known as I entered their dining room. 3 eagles busy eating the remains of a dead sea lion.

The elephant seals continue their moulting. Coming and going down the jetty. The pup seems to be alone and away from the others.

The gulls are working very hard impressing each other with their nest building skills, head bobbing, vocalizations and also copulating. They are much friendlier than when they have nests.

mist maiden

Mist Maiden

Work

The electric fence came down in the wind. A few sealions breached the jetty! Once chased off the fence is working again.

I have been splitting wood and managed to bring 2 wheel barrows to the house. Old hemlock is not easy to split!

 

 

 

very poor picture of a Dunlin. Can you see it?

Gumboot Chiton

 

 

 

Erysimum X cherei: wall flower– Race Rocks Taxonomy

Posted on by


Wallflowers were planted in the early years along the sidewalks by the lightkeepers. They still exist and in a mild winter, you can find them blooming on the island.

There are some interesting interactions that repel predator species which I have reproduced here from Wikipedia.

Defensive compounds

[edit]

Like most Brassicaceae, species in the genus Erysimum produce glucosinolates as defensive compounds.[16][17] However, unlike almost all other genera in the Brassicaceae, Erysimum also accumulates cardiac glycosides, another class of phytochemicals with an ecological importance in insect defense.[18][19] Cardiac glycosides specifically function to prevent insect herbivory[20] and/or oviposition[21] by blocking ion channel function in muscle cells.[22] These chemicals are toxic enough to deter generalist,[23] and even some specialist[24] insect herbivores. Cardiac glycoside production is widespread in Erysimum, with at least 48 species in the genus containing these compounds.[19][25] Accumulation of cardiac glycosides in Erysimum crepidifolium, but not other tested species, is induced by treatment with jasmonic acid and methyl jasmonate,[26][25] endogenous elicitors of chemical defenses in many plant species.[27] Molecular phylogenetic analysis indicates that Erysimum diversification from other Brassicaceae species that do not produce cardiac glycosides began in the Pliocene (2.33–5.2 million years ago),[28][1] suggesting relatively recent evolution of cardiac glycosides as a defensive trait in this genus.

Classication From Wikipedia:

Kingdom: Plantae
Clade: Tracheophytes
Clade: Angiosperms
Clade: Eudicots
Clade: Rosids
Order: Brassicales
Family: Brassicaceae
Genus: Erysimum
Other Members of the Angiosperms at Race Rocks 
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.