Tow Hill Ecological Reserve Overview, Biological and Physical
To protect a sand beach, dune ecosystems and inland moor bogs on Haida Gwai
See the Complete PDF : Tow Hill ER 9overviewpdf
Physical: A broad beach of hard sand is present, partly the result of the presence of Yakan Point which acts as a natural groin and traps sand being moved north eastward by littoral drift. This is a segment of the longest, most spectacular beach in the province. Its 200 m wide foreshore slopes gently into Dixon Entrance, while the backshore is characterized by a series of dunes and ancient beach landforms to 10 m above present sea level. Low-lying wetlands occupy most of the inland part of the reserve, and contain several ponds and a meandering stream.
Biological: Plant communities associated with dunes, coniferous forest and bogs characterize the reserve. Sand-binding grasses and herbs grow in patches on the dunes, including several species that are rare in the province. These are the large-headed sedge, American glehnia and sea mertensia. In British Columbia, the sea mertensia is known to occur only in the Queen Charlotte Islands. In the lee of the beach and sand dunes, Sitka spruce and to a lesser extent western hemlock and western redcedar grow as closed coniferous forest. Further inland, level terrain with impeded drainage has created large open bogs containing much peat moss and many bonsai-like shore (lodgepole) pine. Ten species of peat moss and 12 of reindeer moss (lichens of the Cladonia group) have been recognized on one brief visit to the bogs.
No data are available on wildlife but species observed in the nearby Rose Spit
Ecological Reserve (#10), i.e. Marten, Red Squirrel, Deer Mouse, Black-tailed Deer and Raccoon, are probably also found here. Harbour Seals and Steller Sea Lions are likely visitors along the coast. A variety of shorebirds is expected during migration periods.
Cultural: The site of an historic Haida plank house is in the reserve.
bog adder’s-mouth orchid
Kamchatka spike rush
all Blue-listed under the BC LIST STATUS
The northern location of this reserve, as well as its coastline composition may make it vulnerable to substantial change. Possible increased sea levels and storm activity could erode the sand beach and degrade the fragile dune ecosystems for which this reserve was designated. Higher sea levels and changed hydrology could also alter the inland moor bogs by increasing their salinity and/or changing their seasonal water levels. All changes would be reflected in shifts in the biotic components of the associated aquatic, terrestrial and marine communities.
Widening of Tow Hill Road leading to encroachment on ER boundaries. This and other current road access and associated recreational use such as ATVs threaten rare plant species.
SCIENTIFIC NAMES OF SPECIES MENTIONED IN THE TOW HILL ER ACCOUNT
bluebells, sea (Mertensia maritima)
glehnia, American (Glehnia littoralis ssp. leiocarpa) hemlock, western (Tsuga heterophylla)
moss, peat (Sphagnum spp. )
moss, reindeer (Cladonia sp.)
pine, shore (Pinus contorta var. contorta)
redcedar, western (Thuja plicata)
sedge, large-headed (Carex macrocephala)
spruce, Sitka (Picea sitchensis)
Deer, Black-tailed (Odocoileus hemionus hemionus) Marten (Martes americana)
Mouse, Deer (Peromyscus maniculatus)
Raccoon (Procyon lotor)
Sea Lion, Steller (Eumetopias jubatus)
Seal, Harbour (Phoca vitulina)
Squirrel, Red (Tamiasciurus hudsonicus)