Bog communities require a narrow range of water chemistry, soil and flow conditions to persist. Most typically they are the result of long-term accumulations of decomposing mosses ("peat") in highly saturated, anaerobic conditions. Bogs are characterized by a low pH environment which limits the diversity of plant associations that occur. However the low nutrient conditions have led to the evolution of adaptive plant species such as carnivorous plants like sundew and pitcher plants. The acidity and decomposing vegetation generates tannins which give surface and outlet flows a tea colour, The water levels in bogs are generally sustained via precipitation and they serve a signifcant role in holding and slowly releasing surface runoff and reducing flooding, while providing natural filtration. Aside from Burns Bog, there are a number of bog communities on the South Coast ranging in size and complexity such as Camosun Bog in Pacific Spirit Park, Blaney Bog in Maple Ridge, Lulu Island Bog in Richmond and small pocket bogs on the perimeter of Beaver Lake in Stanley Park or Whonnock Lake in Maple Ridge. Typical plant species include Labrador tea, western bog laurel, salal, lodgepole pine, sphagnum mosses, sundew and skunk cabbage. A number of blue-listed bog communities exist on the South Coast (lodgepole pine / water sedge / peat-mosses odgepole pine / peat-mosses Very Dry Maritime Labrador tea / western bog-laurel / peat-mosses : Labrador tea / western bog-laurel / peat-mosses) and one red-listed community associated with Coastal Douglas-fir - lodgepole pine / peat-mosses CDFmm. Most bog communities in BC and globally continue to be under threat of various land-use activities and a number of local and international efforts continue to work for their preservation and protection.