Mary Lake Nature SanctuaryNature's Protector
The Importance of Continued Conservancy
Listen to what Jill Robinson -Past Executive Director of Habitat Acquisition Trust has to say about the importance of the continued conservancy of the Mary Lake Property. Just click on the arrow for audio
The importance of continued conservancy
Protects Diverse Eco Systems
Plant ecologist Hans Roemer has identified seven distinct ecosystems on the Mary Lake property including:
- Aquatic Habitats
- Open Douglas-fir Forest
- Closed (canopy) Douglas-fir Forest
- Douglas-fir / Arbutus Hilltops
- Rock Outcrop Habitats
In Imperilled Coastal Douglas Fir Zone
It is an excellent example of an advanced second growth forest in the endangered Coastal Douglas Fir Zone on Vancouver Island
- The Coastal Douglas-fir biogeoclimatic zone (CDF zone) is the smallest and most at risk zone in BC and is of conservation concern (Biodiversity BC, 2008).
- The Coastal Douglas-fir ecosystem is tiny, only 0.3% of BC.
- It is very high priority for preservation, home to 29 endangered plant communities.
- Only about 9% of the CDF zone is protected in conservation areas
- Coastal Douglas-fir ecosystems are among the most imperiled coastal ecosystems. CDF ecosystems have been largely destroyed, fragmented and damaged by logging and urban, residential and agricultural development. (CRD)
We are a member of the Coastal Douglas-fir and Associated Ecosystems Conservation Partnership
This property acts as an important wildlife corridor and natural link between Thetis Lake and Gowlland Tod Parks. The increasing urbanization of Vancouver Island is displacing many of the native wildlife species.
“Corridors are critical for the maintenance of ecological processes including allowing for the movement of animals and the continuation of viable populations.” ~ CRD
An experienced ecologist, Dr. Hans Roemer, noted the occurrence of a rare species (CDC blue-listed), mountain sneezeweed (Helenium autumnale var. grandiflora); the presence of beaked hazelnut (Corylus cornuta var. californica), a shrub with a very restricted range on southern Vancouver Island; and aspen (Populus tremuloides); which has become rare in Vancouver Island wetland communities.
“The Wetlands exhibit the greatest species diversity……… the most interesting species combination, with a few remaining Vancouver Island aspen, hardhack, Pacific crabapple, slough sedge, skunk cabbage (to name just a few dominants). This combination originally occurred in many wetlands on southern Vancouver Island, but is now rare, mainly due to early conversion into agricultural land.”~ Hans Roemer, ecologist.
“Wetlands host a similar diversity of freshwater species. Along with many microbe and plant species, these animals form a complex food web. Damage to or removal of one component of the food web can affect the function of the whole system.” ~ CRD
Map showing waterways & Riparian setbacks
Protects a Watershed
The property is in the 13,000 year old Millstream Creek Watershed which begins in the Gowlland Tod range and flows 18 km through many communities on it’s way to Esquimalt Harbour, near the town of View Royal and the City of Victoria, B.C.
A major tributary of the watershed is – Earsman Creek (4.2 km) which also flows through the Mary Lake property.
The seven-acre lake is spring fed and creates a refuge for fish (cutthroat trout) and waterfowl during the dry summer months.
Potential pathway for Salmon
The Millstream Creek has the potential to become a pathway for salmon to reach Upper Millstream for spawning thus increasing the salmon populations. When important fishways are built at Aitkens Rd. in View Royal and Matson Lake in the District of Highlands salmon would be able to ascend as far as Mary Lake
“Loss of spawning and rearing habitat is a major factor in the decline of local salmon stocks. This occurs when wetlands and estuaries are filled in for construction of buildings and roads, and when streams are placed in culverts and otherwise modified. Removal of streamside vegetation is a common consequence of development and has a number of effects.” ~ CRD
Red-Listed Species and Plant Communities on Property
Potential (known in the area)
· Great Blue Heron
· Barn Swallow
· Red-legged Frog
· Olive-Sided Fly Catcher
· Arbutus / Garry Oak
· Red Alder / Skunk Cabbage
· Trembling Aspen / Pacific Crab Apple / Slough Sedge
· Douglas-fir / Dull Oregon-grape
· Garry Oak / Oceanspray
· Western redcedar – Douglas-fir / Oregon beaked-moss
· Little Brown Bat
· Western Screech Owl
· Blue-grey Taildropper
· Sharp-tailed Snake
· Western Grebes
· Western Painted Turtle
· Wandering Salamander
· Bryum subapiculatum
· Phantom Orchid
· Slender Gentian
· Puget Oregonian snail
· Propertius Duskywing Butterfly
· Grand fir / dull Oregon-grape
· Common Bluecup
We are working to confirm the presence of other species at risk as the habitat is suitable for them:
Six nest boxes for screech owl (another species at risk) were installed and an acoustic listening device installed to detect owl calls for a 2-week period in April. The nest boxes will be checked for occupation in early May.
Two bat houses (a maternal box and a rocket box) suitable for the little brown myotis (federally endangered), big brown bat and Yuma myotis were installed in late April.
Habitat Acquisition Trust has been sending biologists Kristiina Ovaska and Christian Engelstoft to the Mary Lake Nature Sanctuary first for a preliminary assessment and recently to do a species at risk survey.
Other Residents of the Sanctuary
Our Feathered Friends
So far we have identified 44 species of Birds on the property.
Visit these links for more info:
The lake is home and play area for 4 resident Otters and 3 busy Beavers.
We need your help! There are many ways you can contribute to the Mary Lake Nature Sanctuary. Your support will have a positive benefit for the whole region, local community and nature.
- Make a Charitable Donation (Tax Deductible)
- Join our Volunteer List
- Sign up for our Newsletter
- Become a member
- Connect and share on social media
- Participate in our events
Mary Lake Nature Sanctuary
1772 Millstream Rd,
Victoria, BC V9B 6E4
Greater Victoria Greenbelt Society
499 Millstream Lake Rd.
Victoria, BC. V9B 6H5
Registered Charity BN: 11894 6953 RR0001
WSÁNEC Coast Salish
Mary Lake lies within the traditional territories of the WSÁNEC (Saanich) Coast Salish Peoples.
We recognize the integral role the ancestors of the WSÁNEC Coast Salish Peoples have played as past stewards of the Mary Lake and Highlands lands.