View all

CM Lake Project Profile

Location
100 Mile House, British Columbia
disturbance
Wildfire
Application year
2022
hectares
7.5
Species
Interior Douglas Fir, Hybrid Spruce, Interior Lodgepole Pine, Western Larch
seed pods used
seeding density
target pod:tree ratio
target stocking
1500 SPH
target trees
11250
assessment year
2023
achieved stocking
1518
More information Coming soon
Read case
Read case
Read case

Project Profile - CM Lake

‍

Project Overview

Partnered with an Indigenous band in the interior of British Columbia near 100 Mile House. The area is very hilly with a blend of south and north exposure. The site consisted of heavily burned Douglas fir and lodgepole pine.

‍

Site Details

Species: Interior Douglas Fir, Hybrid Spruce, Interior Lodgepole Pine, Western Larch

Size: 7.5 Hectares

Target Seedlings: 11,250

Burn Age: 2021

Planted: May, 2022

Biogeoclimatic Zone: Sub-boreal Spruce (dry warm and moist mild)

Land Preparation: None

‍

Flagged Transect Summary (Permanent Plot)

In the first year, seven plots of flagged rows were distributed across the site with pods planted directly adjacent to flags. These permanent plots allowed us to assess early germination rates and species mix before circular plots could be established. Flagged plots consist of rows of embedded pods and rows of pods dropped on the surface, to also help us account for the differences between pods that get buried and those that do not. We used a sampling density of 1 plot / hectare for this site.

‍

Circular Plot Summary (Temporary Plot)

In the second year, ten circular plots were distributed at the site. These circular plots have an area of 55 m² with seedlings counted within the circle area. These plots follow the BC Ministry of Forests guidelines as a reliable method of predicting the average Stems per Hectare across a site.

‍

Findings: Temporary Plot Assessments at Year 2

Site: CM Lake

Size (ha): 7.5

Target Seedlings Per Hectare (SPH): 1,500

Target Seedlings per Circular Plot: 8

Seedlings counted by plot

Plot 1: 15+

Plot 2: 11

Plot 3: 2

Plot 4: 5

Plot 5: 4

Plot 6: 11

Plot 7: 15+

Plot 8: 2

Plot 9: 1

Plot 10: 15+

Seedling Count for Entire Site: >11,390

Average Stems Per Hectare: >1,518

Counts shown as "15+" were capped at 15 seedlings per plot; site totals are therefore reported as minimums (>).

Species Mix (Year 1 permanent plots)

Douglas Fir: 57.8%

Hybrid Spruce: 9.5%

Western Larch: 1.5%

Lodgepole Pine: 31%

‍

Takeaways

1. Permanent plots showed very high germination rates in the first 3 months. If these were used to predict average germinants across the entire site it would amount to roughly 3,900 per hectare.

2. A late-summer heat dome, predation, and poor pod placement spurred significant germinant mortality in the first year (>60%).

3. Fortunately, there was no additional mortality between fall 2022 and fall 2023. In fact, permanent plots showed many seedlings germinate in year 2 (likely due to suboptimal conditions in year 1).

4. Douglas Fir and Lodgepole Pine were the best performers at this site.

5. The temporary plots indicated that the site was sufficiently stocked by the end of year 2. This is due to Flash Forest's pods and likely some natural regeneration.

6. There was some variability between the temporary plots, ranging from 1 to more than 15 seedlings per plot, partially attributable to microsite differences in shade, sunlight, slope direction, soil type, and water table.

7. Microsite differences have been accounted for in our machine learning model, which will be used to adjust planting densities within a block to ensure more even distribution in future planting.

‍

No items found.