Balanus nubilus:Giant barnacle–The Race Rocks Taxonomy

 

The video  is of a juvenile barnacle feeding. It was taken by Sylvia Roach through a microscope camera in the marine lab at Pearson College. The size of the barnacle can be estimated by the small skeleton shrimp which is active in the background. That amphipod is less than 1 cm in length.
Research on the associations of hydroids that live on them has been done at Race Rocks by Dr. Anita Brinckmann-Voss. In her publication on the new species Rhysia fletcheri she has included a photograph of hydroids on the valves of this animal.

Domain: Eukarya
Kingdom:Animalia
Phylum: Arthropoda
Class:Crustacea
Subclass: Cirripedia
Order: Thoracica
Suborder: Balanomorpha
Superfamily: Balanoidea
Family: Balanidae
Genus: Balanus
Species nubilus

Common Name: Giant Barnacle

Giant barnacles are commonly found on rocks, pier pilings, and hard-shelled animals in low tidal zones to 90 meters depth.

They are up to 110 mm in diameter and are not easily confused with any other species. A feature unique to the giant barnacle is the lack of longitudinal striation on the scuta. They also contain the largest individual muscle fibres known to science.

 There has also been an extended essay done on this association by a student from the college. They are often encrusted with the holdfasts of kelp. Occasionally a storm tearing at the kelp will uproot a mass of barnacles and they may end up on a beach in the masses of tangled kelp. One of the reasons we have a ban on anchoring in the reserve is that these barnacles are easily broken away from their locations on rock outcrops by a dragging anchor.

Barnacles are not usually parasites, but the weight of this one could eventually impact negatively on the mussel.

Other Members of the Phylum Arthropoda 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.

 March October 2003- Aven Crawshay (PC)

Race Rocks Digital Herbarium–Archival reference

Race Rocks Digital Herbarium

This Digital Herbarium was created by Ryan M.J. Murphy after his stay at the Race Rocks Marine Protected Area, in British Columbia.  This digital collection features images of over 40 species of marine algae found within the MPA, links to online Quicktime movies, a glossary, and classification information.  Not all species are identified. For these and other Macroalgae species, now see the Race Rocks Taxonomy.

The contents of this project have now been moved to the Race Rocks Taxonomy

Site Information

Race Rocks

Race Rocks in an archipelago situated at 48o17’45”N, 123o31’50”W, south of Vancouver Island in the Strait of Juan de Fuca.  A tidal range that exceeds 3m yields a large intertidal community that is constantly battered by large waves and subject to currents up to 6 knots.  The islands are surrounded by forests of Nereocystis luetkeana in the summer months, under which a highly developed subtidal community exists.

Study Features

Ryan Murphy used digital video equipment from Lester B. Pearson College and an hp digital camera to record the materials presented in this herbarium.  As Race Rocks is a Marine Protected Area, no live samples could be taken, thus necessitating this digital collection.  The author hopes that the benefits of this collection far outweigh the benefits of having brittle preserved samples stored away from public use.

Images and video were collected in the summer of 2002 with the help of Pearson College student Joe Downham.  Identification was completed by Ryan, Anne K. Salomon of the University of Washington, and Garry Fletcher of L.B. Pearson College.

Funding was provided to this project by the Leadership Mount Allison Academic Initiative.

Management

Race Rocks was declared a Marine Protected Area designate in October 2000.  It has been managed by Lester B. Pearson College since 1997.

Favourite Links

   https://www.racerocks.ca

   http://www.mta.ca/~iehrman/jalgaeholics/volume1number1.htm ( now not available)

   http://www.mbari.org

   http://www.algaebase.org

Contact Information

Ryan Murphy:

Garry Fletcher:

Project Supported By

   Lester B. Pearson College of the Pacific

Leadership Mount Allison

Dr. Irena Kaczmarska-Ehrmann

Anne K. Salomon

Garry Fletcher

 Joe Downham

Bibliography

Scagel, Robert F. (1972)  Guide to Common Seaweeds of British Columbia.  K.M. MacDonald Printing, British Columbia.

Halosaccion glandiforme: Sea sac –The Race Rocks Taxonomy

halosaculva

 

Distinguishing Characteristics :
Typical descriptions of Halosaccion glandiforme depict the plant as a thin-walled elongated sausage-shaped sac found in the mid-intertidal region of rock dominated shores. The plant is identifiable by its rounded head and short stipe anchored by a small circular holdfast. It ranges in colour from yellow/brown to red/purple. Also, because of the water it contains, applying pressure to the plant produces fine sprays of water emitted from the pores. In Common Seaweeds of the Pacific Coast (by J. Robert Waaland) it is stated that “Halosaccion glandiforme may reach lengths up to 25 cm and 3 to 4 cm in diameter; typical sizes are about 15 cm long by 2 to 3 cm in diameter.” 

The following pictures were taken by Ryan Murphy, 2005

Domain: Eukarya
Kingdom: Protoctista
Division: Rhodophyta
Class: Rhodophyceae
Subclass: Florideophycidae
Order: Palmriales
Family: Palmariaceae
Genus: Halosaccion
Species: glandiforme (Gmelin) Ruprecht 1851
Common Name: sea sac

Biotic Associations:

Being an intertidal species Halosaccion glandiforme shares its ecological niche with several other intertidal dwelling species. Acrochaetium vagum, a different red algae, is an epiphyte to Halosaccion. Also such species as mussels, barnacles, and species from other algal divisions including Poryphera lancelota, and Fucus gardneri grow in the same vacinity of the intertidal zone as Halosaccion. Predation on the Halosaccion is limited, the most common source of predation is from molluscan grazers like the sea snail Tegula funebralis.

In a study done on Halosaccion at Bamfield Marine Station in 1983, Garry Fletcher found an association of microscopic nematodes dwelling inside the sac of intact Halosaccion. Also noted were the special aggregation of cells that formed the “holes” on the walls of the algae.These are not random pin holes but very specialized regions of the matrix of the water reservoir wall.

References and Sources of More Information:

Fletcher, Alex, INTERTIDAL ZONATION OF HALOSACCION GLANDIFORME: A FOCUS ON HEIGHT AND SLOPE AS FACTORS OF ZONATION, extended essay in Biology, 2002

Johnson, L.E. 1992. Potential and peril of field experimentation: the use
of copper to manipulate molluscan herbivores. Journal of Experimental Marine
Biology & Ecology, v160 n2, pp251-262.

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. Dec 2001–Alex Fletcher  PC.

 

Arenaria melanocephala: Black Turnstone–The Race Rocks Taxonomy

black-turnstone

Ryan took this image in January 2009. At that time of year there were over a dozen turnstones foraging across the island.

 

The Black Turnstone breeds in Western and Southern Alaska on the coastal plain. It winters only on the Pacific coast, from southeast Alaska to central Mexico. It is the most abundant shorebird of rocky shorelines. Favourite habitats include reefs, rocky beaches, jetties, and gravel bars at the mouths of rivers or along lagoons. It may also forage on adjacent mudflats wet sandy beaches, floating kelp beds, and piles of washed-up seaweed. Black Turnstones have been recorded roosting on dry rocks, jetties, and floating log booms at which time they may gather into extremely dense flocks.
It is widely distributed along the inner and outer coast. Its distribution is largely restricted to rocky coastal shorelines, but it frequents many fiords and protected inlets. It is a vagrant in the interior. The Black Turnstone usually occurs in flocks of 10 to 30 birds at Race Rocks where it overwinters.


This slide show shows the Black Turnstone being part of the Food Web at Race Rocks providing  energy for the Peregrine falcon!

Reference used:http://rbcm1.rbcm.gov.bc.ca/nh_papers/gracebell/english/b_turnst.htm

Below are the records for population numbers of Black Turnstones observed in the Christmas Bird Counts.
Domain Eukarya
Kingdom Animalia
Phylum Chordata
Subphylum Vertebrata
Class Aves
Order Charadriiformes
Family Scolopacidae
Genus Arenaria
Species melanocephala
Common Name: Black Turnstone

Other Members of the Class Aves 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.
Angela Chaisson, PC yr 28

 

Students produce Video of work at Race Rocks in three languages

In the first week of November, 2002, three first year students from Pearson College stayed at Race Rocks for their project week. Rosie, from Great Britain, Jeremias from Austria and Ahmad from Egypt were successful in producing several videos while on the island. One of the projects was to produce a video that introduced virtual guests to the island. They have produced this video in three languages :

Arabic version

German version

English version

 

OTHER VIDEOS DONE IN THIS PROJECT WEEK:

Sea pen: Ptilosarcus gurneyi-The Race Rocks Taxonomy

(Ed Note: The scientific name at the start of the video is not correct.) The sea pen, Ptilosarcus gurneyi, is a colonial cnidarian in the same class as the anemone, the anthozoa. One polyp has been modified to form the body,  while the fringes of the “feather” contain numerous small feeding polyps. Typically we find it living in a mud/sand substrate. It is rare around Race Rocks. The only population we have found is this one with a few individuals occurring at 15 metres on the North-West corner of Great Race Island. Note the small burrowing tubeworms in the mud around the organism. This specimen was videoed by Wynne Lawrence and Jean-Olivier Dalphond, both students at the Lester B. Pearson College.

General Description:

The sea pen, Ptilosarcus gurneyi, is a colonial cnidaria in the same class as the anemone, the anthozoa. One polyp has been modified to form the body while the fringes of the “feather” contain numerous small feeding polyps.

Habital:

Sea pens are marine organisms: typically they are found living in a mud/sand substrate at least 3 inches (7.6 cm) deep. It is rare around Race Rocks, with a few individuals occuring on the North-West corner of Great Race Island. Note the small burrowing tubeworms in the mud around the organism.

Feeding:

The polyps feed on detritus, zooplankton (baby artemia), and possibly (according to The Reef Aquarium Vol. Two) phytoplankton.You should offer your Sea Pen Artemia nauplii, Daphnia, pulverized flake food, and detritus stirred up from the bottom of the tank.

Predator:

Predators of the sea pen are two nudibranchs, one the very large 3 inches(7cm) nudibranch, Armina californica and the other Mediaster aequalis, Rose Star Crossaster papposus and the Leather Star Dermasterras imbriacata.

Reproduction:

We don’t know the reproduction of sea pens whether by sexual or asexual means.

References:
http://www.fishroom.com/library/seapen.html
http://www.lanecc.edu/science/zonation/seapen.htm

Kingdom: Animalia
Phylum: Cnidaria
Class: Anthozoa
Subclass: Octocorallia
Order: Pennatulacea Verrill, 1865
Suborder :Subsessiliflorae
Family :Pennatulidae Ehrenberg, 1834
Genus:Ptilosarcus
species:gurneyi
(Ptilosarcus gurneyi)
Common name: orange sea pen

Return to the Race Rocks Taxonomy and Image Gallery

Other Members of the Class Anthozoa 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. 

Original: Dec 2002, Joshua Columbus ( Burma) year PC yr 29).  

additions by G.Fletcher 2018

 

Lathyrus japonicus: Beach Pea–The Race Rocks Taxonomy

 

Description:

The beach pea Lathyrus japonicus or wild pea is found along in several locations at Race Rocks.In the west bay near the docks, and in the southeast beach area. It also has a conspicuous location on the center path where it grows out of an old log planted on end. We have also spread some seeds down the sidewalk wall toward the desalinator building. The flowering size is 3/4 inch wide, The flowering color is pink to purple,The flowering time is June to August. Height is 1-2 feet.

The beach pea has tough roots, is useful a sand binder and it adds nitrogen to the soil.

A major characteristic of the beach pea that makes it an ideal palnt for coastal areas is that it can live in soils which are Nitrogen deficient. It does this as do most of the legumes by converts atmospheric nitrogen to nitrates, a process known as “Nitrogen Fixation” .It has nodules on its roots which house Rhizobium bacteria. (Link to the exercise on Nitrogen Cycle)

Tne beach pea can cause a very serious disease of the nervous system, (brain and spine). Also the beach pea can be toxic to animals. It was however used as a laxative among the Coastal First Nations people.

Range: Coastal Labrador New England, south to North Jersey,along the Great Lakes, Pacific Coast from Alaska to California.The beach pea cannot grow in the shade and requires moist soil.
Domain Eukarya
Kingdom Plantae
Division Anthophyta
Class Dicotyledonaceae
Family Fabaceae
Genus Lathyrus
Species japonicus
Common Name: Beach pea

Other Members of the Angiosperm 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. Mersiha Niksic (PC)

 

A Project Week at Race Rocks

Originally published in the Link, the Pearson College Newsmagazine- number 33, Jan10,2003 “Big Seal is Watching You”A Project Week 

A Project week at Race Rocks Ecological Reserve —-

photos by Jeremias Prassl (yr 29) 

During Project Week November 4 to 11, 2002, three students lived on the lighthouse island of Race Rocks, in the marine protected area. Their project involved making observations to contribute to a data base, and doing some filming. Rosie Townsend, Ahmad Khalil, Jeremias Prassl (all year 29)

Day 1: The weather was marvellous, and at about 13.15 we arrived at Race Rocks, where we were welcomed by Mike Slater, the MPA guardian.

Day2: We held a meeting in the living room to determine what we would do during the next week. First of all there were the daily duties which had to be done at Race Rocks during the day: weather report to the Marina at 0800, morning engine check, salinity and sea water temperature check one hour before high tide, temperature and precipitation check at 1800, evening engine check. Extra to this we decided to do some movie projects. Filled with ideas we passed the afternoon by writing scripts for our projects.:

i) “Big Seal is Watching You” (a sort of “Big Brother” diary)

ii) Tide observation

iii) “How to Run Race Rocks” (a movie Mike asked us to do so he would not have to explain the daily duties over and over again)

iv) Documentation of the expected Department of National Defence Blasts on Bentinck Island and their influence on the sea mammals.

v) An Interview with the scientist which will come to RR every week for the next year.

vi) A short video giving a general introduction to RR

Day 3: Today we began the tide project. This involved taking clips of a fixed point on West Race Rock every hour between 0700 and 1700 to demonstrate the movement of the tides. We finished the editing and stored it on our results tape, so that is the first project that we have finished. We are also discovering that cooking should really be part of our project (creative experience?). Today Jeremias cooked a dish of liver, onions, and pears. Even Ahmad had a shot at cooking some rice, and for a first time in any kitchen. “It wasn’t completely disgraceful”, as Rosie stated. “In fact, it was really good”.

Day 4: We’re really beginning to notice how many whale watchers come past this island every day. There have been tons so far, and they often scare the animals into the water. Chris was supposed to come out with fuel today, but he decided not to risk it because of the predicted storm. At the end of the day, no storm has appeared but we are still hoping. If there is a big storm we intend to sit up in the lighthouse until it is over, or we run out of hot chocolate.

I personally really appreciate having an internet connection. Race Rocks is great, but I think that the isolation would drive me barmy if I couldn’t get in contact with the outside world. Our work today included all the daily duties and shooting all the footage we would need for “How to run RR”. We finished editing that today.

At the moment Ahmad is fasting for Ramadan which means that the only meals we eat as a group are our dinners. Actually, the other two have also been missing meals, since when we have a late breakfast after the morning duties, we don’t feel like eating lunch.

Day 5: The DND blasting was very interesting, especially for the more explosively-minded members of our party. At 0800 we set up our cameras. The first few blasts were not terribly exciting, but they progressively got louder over the day. When the loudest series began the seals and sea lions all stampeded into the water, leaving the island completely deserted. After our windows being shaken nearly to the point were they were about to break, we got scared (but decided not to jump in the Pacific).

Today for dinner we had fajitas that Rosie “cooked” (= take the fajitas and the seasoning out of the package, but them in the microwave, serve them with the enclosed salsa) which were good, even if she does say so herself.

Day 6: The blasting continued today, but still no storm. The effect on the animals was even more dramatic this morning. The first blast went off at around nine-thirty and the effect on the animals was instantaneous. They gradually crawled back while the DND people were on their lunch break, but they rushed straight back off again when they restarted.

Today there are some scientists on the island to study the impact of these tests. We did an interview with them for movie projects. Garry wanted us to ask some impertinent questions – I trust that we have done that to the best of our considerable ability.We think that we saw some whales from a distance, or maybe porpoises. We all hurried down to the docks with our cameras, and hopefully our photos will show more than a couple of fins. We trooped back again upon realising that our ecstasies were the subject of amused observation by the scientists in the lighthouse.

Right now we are listening to army communications on our VHF radio. As the storm is brewing around us and the darkness descends the feeling of a bad war movie is inescapable. If this diary seems to be largely concerned with food, we apologise, but we would like to have this project week officially recognised as a creative experience through cooking.

And so, good’bye for this week to readers of The Link. I hope that 2003 has started for you in health and happiness.

Eileen Dombrowski, Editor

Cormorants vs eagle

ood Evening
TEMPERATURE: Max. 9.5 ºC »» Min. 7.8 ºC »» Reset 9.4 ºC »» Rain 6.8 mm
MARINE LIFE: Although the forecasted high winds did not materialize most of the hauled out Sealions along the north shore of Gr. Race have taken to the water or moved farther inland to avoid the high swells coming in from the weather system to the east. This afternoon one mature Bald Eagle spent about an hour on the high point of West Race. The 200 or so Cormorants took to the air as the eagle landed but soon settled back down leaving a good distance between them and the great raptor.
HUMAN INTERACTION: 5 Ecotour boats and 3 pleasurecraft through today.
posted by Carol or Mike S at 6:09 PM
Good Morning
WEATHER: Sky Cloudy »» Vis. 15 Miles »» Wind North East 5 Knots »» Sea Rippled
posted by Carol or Mike S at 7:25 AM

Students end project week

Good Evening
TEMPERATURE: Max. 9.1 ºC »» Min. 7.3 ºC »» Reset 8.5 ºC »» Rain 1.9 mm
MARINE LIFE:Still seeing fish balls but they are small and not as frequent as in the past weeks. Daily visitors are the usual gulls, Starlings,Crows,Black Turnstones, Surf Birds, Cormorants,Sparrows, Harlequin Ducks,a group of about 30 Black Oyster Catchers and the geese-usually 6 but every couple of days the 7th joins the group for at least part of the day. The Sealion population is still fairly low for this time of year as many of them have left the area since the last series of blasting on Bentinck Island.
HUMAN INTERACTION: Chris in with 2nd Nature to return Rosie, Ahmad and Jeremias to Campus. Garry out in 2nd Nature with guests also 4 Ecotour boats and 2 pleasurecraft through today.
posted by Carol or Mike S at 6:19 PM
Good morning
WEATHER: Sky Overcast »» Vis. 10 Miles »» Wind North 11 Knots »» Sea Choppy
Goodbye RR, thanks for our marvellous project week.posted by Race Rocks Relief at 7:48 AM
Good Evening
Temperature: Max. 9.1 ºC »» Min. 7.1 ºC »» Reset 8.0 ºC
Rainfall: 9.0mm

Our last evening on the island has arrived, we’ll spend it editing
the rest of our projects.
posted by Race Rocks Relief at 7:47 AM