Hinnites giganteus: The purple-hinged rock scallop

scallopnumbered

Hinnites giganteus, the purple hinged rock scallop with associated organisms,  (sponges, barnacles, hydroids etc.)

hinge

This is the “purple hinge” on an open shell of a rock scallop. It is almost obscured by the growth of other invertebrates. The yellow spots are from a parasite, the boring sponge, Cliona sp.. The white anemone is Metridium sp .The snail is Calliostoma sp.

Other Members of the Phylum Mollusca 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.   G.Fletcher 2005

 

Branta bernicla: Black Brant Goose–The Race Rocks Taxonomy

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Branta bernicla Black Brant Goose

The Black brant Branta bernicla is a very unusual visitor at Race Rocks. There are only single individuals that appear, usually in late summer or fall.

Pam  Birley has sent the following images taken with the remote camera 5 which we have put into a short video:

brant-moviePam  writes:
“The dimensions of the Brant are 17″ long and 46″Wingspan, A Canada goose is given as 16″-25″L and 50-68″W (which is quite a variation)
A Glaucous gull is given as 24″L and 50″W Thayer’s  are 20″L and 55” W. So according to that the gulls are all bigger than the Brant – so perhaps the camera was not lying “

The goose continued to hang out with the Canada geese for several months.

ntblackbrantnov14

Black Brant Branta bernicla at Race Rocks see posting of November 22, 2014-for other  photos by Ecoguardian Nick Townley

Physical description
The black brant is a small goose with black head, neck, breast, tail and flight feathers. Its abdomen and tail coverts are white and the back and upper abdomen tend to be brownish-black. Its weight ranges from about 1.5 – 2.7 kilograms.

Global distribution
Black brants nest along the shores of the western Arctic, where they lay eggs in June. In mid-September the young travel to the California and Mexican coasts. The main flock flies over the sea, being seldom observed in British Columbia. There is another migration that may winter as far north as Haida Gwaii. However, the majority winters off the coast lines of Oregon, California and Mexico. The favourite stops for Black Brant Geese are Sooke Harbour, Oak Bay and Sidney Island.

Habitat

Black Brant makes a landing on the heli-pad.

Branta bernicla travel in flocks. The amount of geese in a flock varies, though usually remains at low levels. The brants are considered one of the fastest flying geese.Feeding
They feed mainly on eel grass, which is a significant part of their diet. Other marine plants are also being eaten by them, such as green algae.Reproduction
Black brant’s nests are always placed along shores, never far from the water. In June they lay 4 to 8 eggs and by mid-September the young are ready for a long journey. Immature black brants lack white neck marking and are more black at the bottom.

Classification:
Domain: Eukarya
Kingdom: Animalia
Phylum: Chordata
Sub-Phylum: Vertebrata
Class: Aves
Order: Anserifomes
Family; Anatidae
Genus: Branta
Species: bernicla
Common Name: Black Brant Goose,also called Brent goose.

References:
1. Guiguet, C.J. (1915). The Birds of British Columbia: (6) Waterfowl. Victoria: British Columbia Provincial Museum.
2. Robbins, Chandler S., Bruun, Bertel, & Zim, Herbert S. (1966). A guide to field Identification- Birds of North America. New York: Golden Press.
3. Godfrey, E. (1986). The birds of Canada (2nd ed.). Ottawa: National Museum of Natural Sciences.
See the other posts on this website documenting Brants at Race Rocks
See the index of the Taxonomy of Race Rocks

This file is provided as part of a collaborative effort by the students, faculty, staff and volunteers  of Lester B. Pearson College  2005–Kamil Mika —year 32

 

The Nictitating Membrane of Eagles

The nictitating membrane of birds protects the eye. Pam Birley captured these images of young eagles close to camera 5 in the spring of 2005 to help us demonstrate this adaptation.

You can find further information about this feature at: http://ebiomedia.com/gall/eyes/protect.html

Air Temperature Effects on organisms at Race Rocks

The abiotic effects of air temperature
on the distribution of organisms at Race Rocks.

In this video we discuss the effects on diatom growth from the increasing temperature which results from the increasing levels of solar energy in the early spring in the upper intertidal zone on Great Race Rocks.

 

The Traditional Power Generation System at Race Rocks

Being an isolated Light Station, Race Rocks relied fully on power generated on site up to October of 2006. Electricity was supplied after the start of the light tower in 1860 by a series of diesel run electrical generators.So far we have no information on the kind of generators used in these early years. This page provides a profile of the diesel electrical generating system which now forms part of a back-up for our integrated energy system.
The Engine Room and Oil storage Tanks(2002)
The delivery of a new generator, November, 2000.This generator had a lower output rating, but would be less expensive to run since there were no longer two families living on the island since automation.

 

The original engine room (ca 1860) concrete pad with the newer Solar panel, batteries and the foghorn which the Coastguard had installed to allow automation to take place.

 

 

This file describes the site remediation and restoration project for the old diesel oil tank farm which was removed in 2000

 

 

Environmental Impact of the existing Diesel Oil Energy System.

 

 

The hoses for transporting diesel oil to the island are wound on a central drum on the island. These reach from the dock where fuel is brought by boat, over to the oil storage tanks at the engine room.

Alex Chan beside the diesel fuel storage tank. 2005 Link to the CARBON CYCLE 

Velella velella : The Race Rocks Taxonomy

Velella vellella are actually colonial hydroids, related to jellyfish and most closely related to the Portuguese Man-of-War. They occur only rarely in the waters of Race Rocks, coming in apparently with warmer Pacific currents. They were found washed up and stranded in a tide pool. The little fringe hanging on the bottom side are made up of the feeding tentacles. velella “I have only seen Velella at Race Rocks twice since 1976. This picture I took in the early 1980’s shows a ‘flotilla’ in a tidepool.” (Garry Fletcher, 2005.) hand In May of 2005, Wilfred Kroese of the Netherlands sent in this picture of a specimen he had found while touring in BC. When we informed him of the identity, he replied: “Due to your answer I was also able to find the Dutch name for it:‘bezaantje’, a name similar to one of the sails on a large sailboat. One that is attached to the rear mast.”
Velella are actually colonial hydroids, related to jellyfish and most closely related to the Portuguese Man of War. They occur only rarely in the waters of Race Rocks, coming in apparently with warmer Pacific currents. They were found washed up and stranded in a tide pool. The little fringe hanging on the bottom side are made up of the feeding tentacles.
They actually use their sails to traverse the open ocean in a group, and apparently in different hemispheres their ‘sails’ are angled differently to catch the wind and go with the proper currents…( Maybe that’s where early sailors figured out how to rig a ship!)

Physical appearsance: The Velella velella as been given the common name of by-the-wind-sailor because of its semicircular sail placed in a 45° angle on the float. The float contains a series of sealed air chambers that provide its buoyancy. This part of the by-the-wind-sailor is easily recognizable by its deep blue color; it can also measure up to 10cm in length. Hanging down from the float, you can also observe short tentacles. If the wind is blowing … – North-West, South-East: the float will drift left of the wind direction – South-West, North-East: the float will drift right of the wind direction Global distribution: This organism is found all around the world, in temperate or tropical seas.

Habitat: The Velella velella lives on the surface of the open ocean. After a storm you can also found them by the coasts.

Feeding: This organism feeds on pelagic organisms,  including young fish and zooplankton. Predators: The by-the-wind-sailor has three predators: a sea slug, Fiona Pinnata; a sunfish, Mola Mola and a violet snail, Janthina Janthina. 

Mode of reproduction: the sexual reproduction and early development are little none. Interesting fact: The Velella velella is not dangerous to humans but its better if you don’t touch them. If you do, don’t touch sensible skin such as your eyes or your face because some irritation may result.

Classification:

Domain Eukarya
Kingdom Animalia
Phylum Cnidaria
Class Hydrozoa
Order Hydroida
Family Velellidaea
Genus Velella
Species velella
Common Name: by-the-wind sailor

References: N. Kozloff, Eugene. Marine Invertebrates of the Pacific Northwest. Seattle and London: university of Washington press, 1996 Morris, Abbott, Haderline. Intertidal Invertebrates of California. Stanford, California: Stanford University Press, 1980. Velella velella. By-the-wind-sailor. 2003. Marine Biological Association of the United Kingdom. November 10th 2005. http://www.marlin.ac.uk/species/Velellavelella.htm Velella Velella. 2003. National Sea Grant College Program of the U.S. Department of Commerce’s National Oceanic and Atmospheric Administration. November 10th 2005.http://seagrant.oregonstate.edu/sgpubs/onlinepubs/g03004.pdf “David Wrobel.” Velella Velella (Linnaeus, 1758): By-the-wind Sailor. The Jellies zone. November 10th 2005. http://jellieszone.com/velella.htm

see this link for other hydroids:  https://www.racerocks.ca/tag/hydroid/

This file is provided as part of a collaborative effort by the students, faculty,staff and volunteers of Lester B. Pearson College
2005  Virginie  PC year 32

 

Preliminary Screening: BC Parks Impact Assessment

                                                                                                               File No:   85700-35/0210206

BC Parks Impact Assessment Process

Level 1, Preliminary Screen Report

(See Users Guide, pp. 9 to 12)

Name of Action:       Expand generator shed for battery storage for Current Turbine Project  

Proponent:               Lester B Pearson College

Review Date(s):         March 17,05                                                                Page:  1of 3

A. Issues and Environmental Components

  1. List any issues of concern that have been or may be raised by BC Parks, other government agencies, First Nations, or the public.

Impacts of expanding sidewalk footprint. Impact on nesting birds.

ie: Construction should take place when birds aren’t nesting.

No habitat loss should take place.

Impacts that could potentially be damaging to other wildlife and plant communities as a result of  demolition/construction activities.

  1. Identify any geographic “hotspots” at or close to the proposed action (e.g., areas of high use, concentrations of facilities, wilderness conservation zones, unique landscape features).

The proposed footprint of the engine room expansion is represented below. Note the sidewalk extension is made more clear in following diagrams.

This would accommodate the floor plan represented following:
The outside wall with the double door in the technical diagram is the part that would occupy the small white square above.

This would accommodate the floor plan represented following:
The outside wall with the double door in the technicall diagram is the part that
would occupy the small white square above.

  1. Identify any important environmental, recreational, social or economic values in the area of the proposed action and/or the area surrounding the proposed action (e.g., rare or endangered species, hiking experience, midden site). Include a rationale as to why the value is considered important.

Ensure no endangered or rare plant species or other habitat is lost as a result of expansion of sidewalk. Reduce size to minimum needs.

This area has been surveyed on April 6 /05 by Pam Thuringer of Archipelago Marine and she has indicated there are no endangered plant species therein. Most of the grasses are introduced species, with a few invasive species. None of the rock outcrop up the slope is impacted by this extension.

“I have recommended that the sod that is lifted, should be transplanted to another area of the island, for instance to a corner of the top of the concrete covered cistern, which could support a grass community if  adequate soil depth was restored, or other areas which currently have concrete which could be moved such as the “sidewalk to nowhere!” below, located by the boat shed.   I think that restoration of this 17 by 4 foot area would be a suitable mitigation for the impacted area by the engine room, as it adds habitat in an area more suitable for nesting. ”
(Garry Fletcher)

Preliminary Screen Checklist Page:  2of 3

Complete the following based on information available and/or the experience of BC Parks staff at the time of the review.

  1. BC Parks has a responsibility to comply with the following Acts and regulations. Indicate that the proposed action complies with the following: Done ( or N/A)
    Park Act, Park Amendment Acts Yes
    Ecological Reserve Act Yes
    An order issued under the Environmental Land Use Act n/a
    BC Environmental Assessment Act n/a
    Waste Management Act n/aHeritage Conservation Act (i.e., Archaeological Impact Assessment Guidelines) n/a
    Federal Fisheries Act (Department of Fisheries and Oceans) n/a
    Other (specify):
    Comments:
    BC Parks should ensure that all actions comply with BC Parks policies. Indicate that the proposed action complies with the following: Done
    Approved management plan or management direction statement (MDS)Yes
    BC Protected Areas Strategy: Resource and Recreation Use Guidelines for Protected AreasYes BC Parks Policy including conservation and recreation goals (Striking the Balance) Yes
    BC Parks Policies (specify):Eco reserves set aside for protection and research Yes
    BC Parks ConservationProgramPolicies yes
    BCParksAnnualManagementPlan (i.e.,valuesandtargets)n/a
    Other (specify):
    Comments:
    Page:3 of 3 3.
    Document which agencies /stakeholders that have been or should be notified and/or contacted: yes” Done ( or N/A)
    Conservation Data Centre n/a Ministry of SRM (specify branch):
    Ministry of Forests (i.e., Range Act) n/a

Ministry of Energy and Mines (Mineral Tenure Act) n/a
Ministry of Health Services n/a>
First Nations Yes
Agencies responsible for broader level plans (i.e., Regional District, LRMP) n/a
Other (specify):
Comments (include name and title of contact):
The proposed action is likely to result in the following impacts (check all that apply) Done
(U or N/A)

Adverse and permanent effects on the important conservation, recreation and/or cultural heritage values n/a

Adverse and permanent effects on the character and aesthetics of the protected area n/a

Adverse effects to endangered, threatened or vulnerable or regionally significant species, populations and  habitats (i.e., red/blue-listed species/habitats, biogeoclimatic representation) U

Adverse effects to critical or geographically unique characteristics U

Adverse effects to public health and safety n/a

Adverse effects to traditional use of the area by First Nations n/a

Adverse effects to local communities n/a

Adverse effects to the recreational use or enjoyment of the park (regardless of the intended benefits of the proposed action) n/a

Economic implications, such as operating costs, that cannot be maintained over time n/a

 A high level of controversy or public concern regarding the action n/a

Effects of the action, which when combined with the effects of other actions in the region, may result in cumulative impacts n/a

Implications which may be precedent-setting and should therefore be considered in the context of similar future actions n/a

Comments (use corresponding letters to refer to specific impacts listed above):

  1. Level 1 report should recommend appropriate times and methods for construction to ensure birds /wildlife impacts are kept to a minimum.

The window of work for the sidewalk construction will be in the next few weeks. It is scheduled to start on April 18, well before the onset of nesting in late May. We have given the end of April as a deadline for the sidewalk extension and any other on land work that may compromise the bird nesting habitat to be completed.

Concrete will be made on site from materials transported to the island.

  Garry Fletcher and /or Chris Blondeau will be on site to oversee the environmental concerns and Brian Emmett and Pam Thuringer and staff of Archipelago Marine have been contracted to do an ongoing environmental assessment for the duration of the construction phase of the project during the next year.

  1. An on ground review of proposed sidewalk location and reduced sidewalk footprint recommended.

See photos above.

Lottia instabilis: The Race Rocks taxonomy

The unstable limpet measuring approximately 3-4 cm is brown on its exterior and interior. It’s saddle-shaped when turned on it edge. Its habitat at Race Rocks is on the stipes (stems) of Pterygophora always growing subtidally.Thus the uneven margin underneath. It’s range is from Alaska to California

Joel Julius PC year 31 , with the shell of the unstable limpet.

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Patellogastropoda
Superfamily: Lottioidea
Family: Lottiidae
Genus: Lottia
Species: L.Instabilis

 

 

 

 

 

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.  2005-Joel Julius PC year 31.

Lottia digitalis: Finger Limpet– The Race Rocks taxonomy

Shamsher is pointing to a cluster of Lottia digitalis in the high intertidal area by peg 5b.

the artificial tidepool, this cluster of Lottia digitalis has been in the same place, to the left of the built stone wall since the building of the pool.

Behavior: These Limpets breath by drawing water from the left site over the gills out to the right site.

Description: Limpets are basically conical but they have an off-centre peak that curves over. Dark ridges extend from the peak to the edges of the shell. They grow to about 3 cm in diameter.

previously referred to as Collisella digitalis

 

 

 

 

 

Kingdom: Animalia
Phylum: Mollusca
Class: Gastropoda
(unranked): clade Patellogastropoda
Superfamily: Lottioidea
Family: Lottiidae
Genus: Lottia
Species: L. digitalis
Lottia digitalis
(Rathke, 1833)
Synonyms
Collisella digitalis
Acmaea digitalis

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  2005- Shamsher Virk