Field Trips Flashcards
1
Q
South IVB
A
- Lots of anthropogenic impact (trailer park, equestrian activity, ball field ===Gentrification!)
- Impacts: Land removed from ALR, for sale, rezoning application for estates, the for sale land is connected hydrologically to marsh, ditching and draining to prevent flooding)
- CRD side more impacted due to agriculture (potato farming)
- Bent grass is prolific seed producer, terribly invasive
2
Q
History of IVB
A
- Gentrified with English parks, more open (land clearing, makes people feel safer), equestrian park, trailer park, ball field, agriculture, draining and ditching of marsh
3
Q
Politics of IVB
A
- Central Saanich is very pro-agriculture
- CRD wants to push back to pre-colonial impacts
4
Q
South IVB possible changes to reverse impacts
A
- Must determine Historical Target to be achieved, but how? Pre-colonial, or just pre-ditching?
- Restoration is still possible because pockets of natives still exist
- Flood area more often and invasive species such as quackgrass would not do as well and natives would do better. Would also reduce shrub establishment
5
Q
North IVB
A
- Red-listed communities
- Also has invasive species moving in on edges indicating changing hydrology
- Part is a coastal wetland, brackish with no flow through
- Has a dune system on edge of marsh
- Expensive fence through marsh for Puckle Farm
6
Q
3 indicators for wetland delineation
A
- Species
- Hydrology
- Soil eg. Peat
7
Q
1st ditch on north side
A
1926
- More drainage favours grasses
8
Q
Maple Bay
A
Irv Banman
- NCC bought Elkington property in 1999 and it was heavily invaded by broom, etc.
- Almost sold to developer, but saved by community and NCC
- Bought lower field in 2001
- Closed to public due to rare species but sometimes do tours
- Historic state determined by photos and an old survey (called it oak and pine plains)
- Indicated that it was mixed in past as in current state
- Phytolith studies determined that it has been grassland for thousands of years, therefore it must have been managed by people
- Have lots of data and some specific research is done on site (Universities)
- Funding for restoration and supplies is difficult to come by and volunteers are essential
9
Q
Garry Oaks
A
- GO’s need full sun (cannot be overtopped), with that they can adapt to drought and flood
- NCC property is Valley bottom with deep soil which has become rare due to being prime development sites
- Managed by people, or likely would have been fir forest
10
Q
Planting restoration (NCC)
A
- 1st remove invasives
- Natives were surviving in understory but not thriving
- need seeds and plants
- started nursery and found mature plants work best for plantings
- Determined areas to target for planting as not all areas are ideal and may not be effective
- Fenced areas for deer exclusion (must be large sq. ft. or raptors will destroy small ones trying to get at rodent prey)
- Mow to open up light and reduce snowberry (invasive native) b/c not enough fire or ungulate grazing
- Doug fir was replanted in historic fir forest on north side
- Spacing conifer forest to increase light penetration
11
Q
Prescribed fire at NCC
A
- McDougal paper researched on site
- Need to follow rules to get permits, cooperate w/ authorities
- Get public awareness about positives
- Ministry of Forests, By-law office, Coastal fire center, firefighters all need to be ‘on board’ in order to get permits
- Starting to get more participation form fire hall and were able to double the size of the burn plot to 1.4 ha this year
12
Q
What does a prescribed fire need?
A
- Good ventilation and humidity
- ## Wind in right direction and not too strong
13
Q
Why are squirrels an issue at NCC?
A
- Eat acorns, tree germ, and birds and nestlings
- Use death machine to kill the squirrels (all invasive anyways)
14
Q
How to set a prescribed burn
A
- Need good venting, humidity and proper wind
- Mow along edges of plot to remove fuel
- Surround plot with multiple water nozzles available and wet perimeter to moisten edge fuel
- Perform a ‘back-burn’ ie. (against) direction of wind, provides a slow moving, low profile, thorough burn
- Burn strips 10ft apart and move towards each other, extinguish before moving on
- Establish burnt areas around trees to prevent upward burning of moss using a drip torch and then hose down
- Fire is cool-burning, and fast so doesn’t penetrate deep
(seed bank & acorns survives)
15
Q
How is prescribed fire effective?
A
- Seed bank is not penetrated (fire doesn’t reach deep enough) so native seeds survive along with some invasives and rhizomes
- The solarisation of the blackened land cooks the grasses to kill them if fire doesn’t
- Photo-monitored plots afterwards to monitor responses of plants
