Percent stocking models for four major Alberta tree species

Yang, Yuqing; Huang, Shongming; Dempster, W. R.

doi:10.1093/forestry/cpn019

Cited by 5 publications

(2 citation statements)

References 20 publications

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“…In addition, all cutblock transects both on and off seismic lines exceeded 90% stocking, further suggesting that trees were equitably distributed throughout the measurement area rather than clumped; this is an important measure of regeneration success in forest management (Yang et al, 2008). In terms of understory communities, overlapping groups in the NMDS visualization of shrubs and sapling species abundances showed that overall, these communities are similar both on and off seismic lines.…”

Section: Similar Tree Regeneration On and Off Seismic Lines In Cutblocksmentioning

confidence: 88%

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The influence of forest harvesting activities on seismic line tree and shrub regeneration in upland mixedwood boreal forests

et al. 2023

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Alberta’s forests are becoming increasingly disturbed and fragmented by the cumulative effects of anthropogenic disturbances exacerbated by the enduring footprint of seismic lines on the landscape. Forest harvesting and subsequent reforestation activities (e.g. site preparation and tree planting) may facilitate tree growth on seismic lines when forestry companies incorporate them into management areas. In this study, forest regeneration was assessed along transects on and off seismic lines within four cutblocks in northwestern Alberta. Tree, sapling, and shrub characteristics were measured and tree cookies from a subset of trees on and off seismic lines were used to model height growth. No difference in total tree, sapling, or shrub counts on and off seismic lines were found although trees on seismic lines were growing at slightly slower rates compared to the adjacent cutblock and Alnus viridis was more abundant on seismic lines. Our results suggest that, despite some species-level differences and slight differences in tree growth rates, trees on seismic lines within cutblocks are regenerating similarly to other trees growing in the post-harvest stand. These findings indicate that forest harvesting, and subsequent reforestation could represent an important tool in conducting landscape-level restoration in mixedwood forests where seismic lines have not naturally recovered.

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Section: Similar Tree Regeneration On and Off Seismic Lines In Cutblocksmentioning

confidence: 88%

“…These parameters were evaluated for total trees, total saplings, and total shrubs as well as for the most common individual species. In order to assess regeneration in terms of stocking, a metric used in forest management, the percent of 10 m 2 plots containing at least one tree > 1.3m was calculated for each transect (Yang et al, 2008).…”

Section: Discussionmentioning

confidence: 99%

The influence of forest harvesting activities on seismic line tree and shrub regeneration in upland mixedwood boreal forests

et al. 2023

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Cut vs. fire: a comparative study of the temporal effects of timber harvest and wildfire on ecological indicators of the boreal forest

Best,

Brown,

Elkin

et al. 2024

Landsc Ecol

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Context Large-scale natural disturbances are crucial drivers of ecosystem function and composition for many forested ecosystems. In the last century, the prevalence of anthropogenic disturbances has increased across Canada’s boreal forest. Habitat disturbance from timber harvest and wildfire is linked to declines of boreal species, including woodland caribou (Rangifer tarandus caribou). Objectives We tested how disturbances influenced the recovery trajectory of ecological indicators of timber, biodiversity, and wildlife habitat through time following timber harvest and wildfire across the boreal forest of Alberta, Canada. Methods During 2021 and 2022, we collected field data from 251 timber harvested and 264 burned stands (0–40 years since disturbance), as well as 256 older forest stands used by caribou (> 40 years since disturbance). Field data included metrics of stand attributes (e.g., basal area, stems per hectare), coarse woody debris (CWD), and abundance of forage for caribou, moose (Alces americanus), and bears (black bear: Ursus americanus, grizzly bear: Ursus arctos). Results Basal area of trees and stems per hectare recovered more quickly in timber harvest sites when compared to wildfire sites, but as time since disturbance increased there were no differences in these attributes among timber harvest, wildfire, and caribou use sites. CWD was greatest in recently burned sites, but declined over time to be similar in quantity as in harvested stands and older forest stands. Terrestrial lichens, important forage for caribou, were most abundant in the older caribou use sites, whereas forage for moose and bears, including shrubs, was most abundant in younger timber harvest and wildfire sites. Conclusions Our results demonstrate that timber harvesting may result in a quicker development of timber volume when compared to wildfire. However, this anthropogenic disturbance is less advantageous for the development of caribou habitat.

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Observations on relationships between regeneration stocking and yield

Farnden

2010

Forest Ecology and Management

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Percent stocking models for four major Alberta tree species

Cited by 5 publications

References 20 publications

The influence of forest harvesting activities on seismic line tree and shrub regeneration in upland mixedwood boreal forests

The influence of forest harvesting activities on seismic line tree and shrub regeneration in upland mixedwood boreal forests

Cut vs. fire: a comparative study of the temporal effects of timber harvest and wildfire on ecological indicators of the boreal forest

Observations on relationships between regeneration stocking and yield

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