Effects of suppression and release on sapling growth for 11 tree species of northern, interior British Columbia

Wright, Elaine F.; Canham, Charles D.; Coates, K. David

doi:10.1139/x00-089

Cited by 102 publications

(87 citation statements)

References 29 publications

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“…Only 5.8% of the microsites received >12% full sunlight 5 years after tree removal. Hybrid spruce is intermediate in shade tolerance (Kobe and Coates, 1997;Klinka et al, 2000) and seedlings and saplings are considered in a state of suppression at about 12% full sunlight, with an expected mortality rate of 10% over a 3-year period (Wright et al, 2000). It is therefore not surprising that after 10 and 20 years only 23 and 3%, respectively, of the planted spruce seedlings had survived in the uniform 40% removal treatment.…”

Section: Resultsmentioning

confidence: 99%

“…We used parameter values from Kobe and Coates (1997), Wright et al (2000), Canham et al (1999), LePage et al (2000) and ongoing field studies in boreal forests (unpublished data). Adult tree radial growth was derived from 33 permanent sample plots near Fort Nelson, British Columbia (58850 0 N, 122840 0 W).…”

Section: Methodsmentioning

confidence: 99%

“…SORTIE/BC has been parameterized for conditions in northern British Columbia (Kobe and Coates, 1997;Wright et al, 1998Wright et al, , 2000Canham et al, 1999;LePage et al, 2000;Canham et al, in review). It is a descendent of the SORTIE model developed in the early 1990s for transitional oak-northern hardwood forests in the northeastern US (Pacala et al, 1993(Pacala et al, , 1996.…”

Section: Sortie/bc Model Developmentmentioning

confidence: 99%

“…We can also incorporate growth functions that account for past periods of suppression and release (Wright et al, 2000). Adult tree growth rates can be estimated by species from remeasurement of permanent sample plots or from more mechanistically derived functions based on neighbourhood competition (Canham et al, in review).…”

Section: Growth Submodelmentioning

confidence: 99%

See 3 more Smart Citations

Use of a spatially explicit individual-tree model (SORTIE/BC) to explore the implications of patchiness in structurally complex forests

Coates

Canham

Beaudet

et al. 2003

Forest Ecology and Management

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138

120

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The discipline of silviculture is evolving rapidly, moving from an agricultural model that emphasized simple stand structures toward a natural disturbance-or ecosystem-based model where stands are managed for multiple species and complex structures. Predicting stand dynamics and future yields in mixed-species complex structured stands cannot be easily accomplished with traditional field experiments. We outline the development and structure of SORTIE/BC, a descendent of the SORTIE model. SORTIE/BC is a light-mediated, spatially explicit, mixed-species forest model that makes population dynamic forecasts for juvenile and adult trees. We use the model to simulate partial cutting prescriptions in temperate deciduous, boreal and temperate coniferous mixed-species forests. The species, amount and spatial pattern of canopy tree removal had a major influence on understory light environments. Low and uniform removal of canopy trees were less successful in favouring the growth and survival of regenerating trees of intermediate to shade intolerant species and the growth of retained canopy trees than patch removal. In the boreal mixedwood, strip-cutting can maintain mixed stands but careful attention must be paid to buffer and strip management to optimize stand growth. We conclude that SORTIE/BC can be very useful to explore and explain the silvicultural implications of complex silvicultural prescriptions for which there are no existing long-term experiments. #

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Section: Resultsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Sortie/bc Model Developmentmentioning

confidence: 99%

Section: Growth Submodelmentioning

confidence: 99%

See 2 more Smart Citations

Use of a spatially explicit individual-tree model (SORTIE/BC) to explore the implications of patchiness in structurally complex forests

Coates

Canham

Beaudet

et al. 2003

Forest Ecology and Management

Self Cite

138

120

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“…High tree mortality rate is a well-known phenomenon in dense young stands, and it is mostly related to the intensive competition for resources, mostly for light (e.g. Wright et al 2000). Anyway, the total input to the necromass pool (annually 900 g per m 2 and 1,100 g per m 2 in the beech and spruce stand, respectively) can be relatively even larger than in old beech or spruce stand.…”

Section: Discussionmentioning

confidence: 99%

Quantifying carbon in dead and living trees; a case study in young beech and spruce stand over 9 years

Šebeň

Konôpka

Pajtík

2017

Central European Forestry Journal

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In Slovakia, the contribution of young stands to the total forest area has been increasing in the last decade. However, scientific attention to these stands was previously very sparse and they were usually not included in local and country carbon stock estimates. Therefore, we focused on the calculation of tree biomass and necromass in young beech and spruce stands as well as on their development during the period of nine years (aged from 4 to 12 years). For the calculation, we implemented allometric equations using tree diameter and height as independent variables. The results showed very dynamic changes in biomass (carbon) stock. Specifically, tree biomass increased in the period of 9 years from about 2,000 g to 15,000 g (i.e. cca 1,000 to 7,500 g of carbon) per m 2 in beech, and from 4,500 to 12,000 g (cca 2,300 to 6,000 g of carbon) per m 2 in the spruce stand. At the same time, the amount of biomass (fixed carbon) was only slightly larger than the accumulated quantity of necromass (carbon loss from living trees). It means that a large portion of carbon was allocated to necromass. We found that not only the foliage fall but also the mass of dead trees, a result of intensive competition, was an important path of carbon flux to necromass. The results proved that although young forests fix much less carbon in their biomass than old stands, they can represent large carbon flux via annual increment of necromass. This indicates that young stands should not be omitted in forest carbon balance estimates of the country.

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Reproductive maturity and cone abundance vary with tree size and stand basal area for two widely distributed conifers

et al. 2020

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2020. Reproductive maturity and cone abundance vary with tree size and stand basal area for two widely distributed conifers. Ecosphere 11(5):Abstract. Understanding potential limitations to tree regeneration is essential as rates of tree mortality increase in response to direct (extreme drought) and indirect (bark beetle outbreaks, wildfire) effects of a warming climate. Seed availability is increasingly recognized as an important limitation for tree regeneration. High variability in seed cone production is a trait common among many northern temperate conifers, but few studies examine the determinants of individual tree cone production and how they vary with stand structure. In subalpine forests in the southern Rocky Mountains, USA, we monitored >1600 Picea engelmannii (Engelmann spruce) and Abies lasiocarpa (subalpine fir) trees for cone presence (an indicator of reproductive maturity) and a subset of those trees for cone abundance (an indicator of seed production) from 2016 to 2018. We constructed mixed models to test how individual tree cone presence and cone abundance were affected by tree size and age as well as forest attributes at the neighborhood-and stand-scales. The probability of cone presence and cone abundance increased with tree size and age for A. lasiocarpa and P. engelmannii. The youngest ages of trees with cones present were more than 100 yr later for individuals in high basal area (BA) stands (>65 m 2 /ha) relative to low BA stands (<25 m 2 /ha). P. engelmannii produced many more cones than A. lasiocarpa at similar sizes, especially in young, low BA stands. Our findings reveal how differences in tree sizes and stand structures typically associated with time since last disturbance can affect seed production patterns for decades to well over a century. The consistent regional pattern of earlier and more abundant postfire establishment of P. engelmannnii vs. the delayed postfire establishment by A. lasiocarpa may be partially explained by species' differences in cone abundance by stand structure. The increasing loss of large, dominant cone-producing trees will significantly reduce seed production to support future tree regeneration and maintain forest cover. However, seed availability and resilience following disturbances may be less limiting than expected for species like P. engelmannii that have the capacity to produce more cones in open-canopy forests, such as recently disturbed areas.

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Effects of suppression and release on sapling growth for 11 tree species of northern, interior British Columbia

Cited by 102 publications

References 29 publications

Use of a spatially explicit individual-tree model (SORTIE/BC) to explore the implications of patchiness in structurally complex forests

Use of a spatially explicit individual-tree model (SORTIE/BC) to explore the implications of patchiness in structurally complex forests

Quantifying carbon in dead and living trees; a case study in young beech and spruce stand over 9 years

Reproductive maturity and cone abundance vary with tree size and stand basal area for two widely distributed conifers

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