Seed abscission schedules and the timing of post-fire salvage of Picea mariana and Pinus banksiana

Greene, David F.; Splawinski, Tadeusz Bartek; Gauthier, Sylvie; Bergeron, Yves

doi:10.1016/j.foreco.2013.03.049

Cited by 28 publications

(20 citation statements)

References 25 publications

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“…2b). This inter-specific difference is due to the shorter abscission schedule of jack pine, where 50% of seeds are abscised within roughly a month following fire, compared to 10 months for black spruce (Greene et al 2013;Splawinski et al 2014). As for the differences between early and late fires For personal use only.…”

Section: Resultsmentioning

confidence: 99%

“…are the two most common conifers in Canada , and are well-adapted to the stand-replacing wildfires common to the circumboreal forest because of their aerial seedbanks, i.e., canopy seed storage (Enright et al 1998, Stocks et al 2002, De Groot et al 2004. The passage of the flaming front results in the opening of scales on the cones, thus allowing seeds to abscise (Lamont et al 1991, Enright et al 1998, Johnstone et al 2009, Greene et al 2013. These seeds are then dispersed onto organic layers that have been reduced by smoldering combustion following medium to high severity fires, with about 40% of the substrate on average rendered into optimal seedbeds of a few centimetres organic thickness or less (Miyanishi 2001, Miyanishi and Johnson 2002, Greene et al 2007.…”

Section: Introductionmentioning

confidence: 99%

“…The abscission period for black spruce seeds is more protracted than for jack pine, requiring roughly five years to abscise 90% of seeds compared to about one year for jack pine (Greene et al 2013). Salvage operations are typically scheduled within the first few months following fire to minimize degradation of fire-killed boles by saprophagous beetle larvae and by checking (St-Germain and Greene 2009).…”

Section: Introductionmentioning

confidence: 99%

“…Salvage operations are typically scheduled within the first few months following fire to minimize degradation of fire-killed boles by saprophagous beetle larvae and by checking (St-Germain and Greene 2009). The removal of these stems effectively removes the non-abscised portion of the aerial seedbank (Greene et al 2006(Greene et al , 2013Splawinski et al 2014), and the operation also leads to dramatic mortality among the first cohort of germinants. This has a negative effect on black spruce, and to a far lesser extent jack pine, regeneration potential (Greene et al 2006(Greene et al , 2013Splawinski et al 2014).…”

Section: Introductionmentioning

confidence: 99%

“…The removal of these stems effectively removes the non-abscised portion of the aerial seedbank (Greene et al 2006(Greene et al , 2013Splawinski et al 2014), and the operation also leads to dramatic mortality among the first cohort of germinants. This has a negative effect on black spruce, and to a far lesser extent jack pine, regeneration potential (Greene et al 2006(Greene et al , 2013Splawinski et al 2014). Stands that exhibit poor stocking following salvage must be planted at a cost of about CAD $800/ha (St-Germain and Greene 2009).…”

Section: Introductionmentioning

confidence: 99%

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A stand-level tool for predicting the natural regeneration density of black spruce and jack pine following fire and salvage

Splawinski¹,

Greene

Gauthier

et al. 2015

The Forestry Chronicle

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A tool was developed to allow managers and foresters to quickly assess reforestation needs following forest fire and salvage logging at the stand level in both pure and mixed black spruce and jack pine stands. This on-site operational assessment tool was created using a forest regeneration model that simulates the natural regeneration densities of black spruce and jack pine following fire and salvage. Tree species basal areas used for simulations represent the natural range expected in the field. Additional parameters include the abscission schedule of the species, the percentage of optimal (exposed mineral soil or humus) post-fire seedbeds, and the timing of the salvage operation. The tool also allows for rapid planning of both salvage operations and planting. It has important advantages over conventional seedling surveys in that it can be employed immediately following fire, can guide management decisions about the planning of road construction and the harvest sequence, and takes into account the entire establishment phase. Using the tool to adjust the harvesting schedule to minimize replanting, the likely final cost of reforestation can be estimated for an entire burn. The tool shows that a higher percentage of optimal seedbeds are necessary following salvage: (1) for black spruce to regenerate adequately compared to jack pine (i.e., planting of black spruce will almost always be necessary); (2) as basal area of the species of interest decreases; and, (3) to adequately regenerate burned intact and salvaged stands in late-season fires compared with those from early-season fires.Keywords: fire, salvage, black spruce, jack pine, natural regeneration, model, planting, stand-level assessment. RESUMÉUn outil a été élaboré afin de permettre aux gestionnaires et aux forestiers d' évaluer rapidement les besoins en matière de régénération des peuplements ravagés par le feu et exploité peu après, tant dans le cas des pessières noires pures et mélan-gées que dans le cas des pinèdes grises. Cet outil d' évaluation utilisable sur place a été élaboré à partir d'un modèle de régé-nération forestière qui simule les densités de régénération naturelle des pessières noires et des pinèdes grises à la suite d'un feu et des travaux de récupération. Les surfaces terrières des arbres utilisées lors des simulations sont représentatives de la variation naturelle retrouvée dans la nature. Des paramètres supplémentaires comme le délai d'abscission des espèces, le pourcentage de lits propices à la germination (sol minéral exposé ou humus) et le calendrier des opérations de récupé-ration ont été ajoutés au modèle. L' outil permet également la planification rapide des opérations de récupération et de plantation. Il constitue un avantage important relativement aux inventaires conventionnels de semis du fait qu'il peut être utilisé immédiatement après un feu, qu'il permet de guider la gestion des décisions reliées à planification de la construction des chemins et à la séquence des opérations de récolte, en plus de prendre en considéra...

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

A stand-level tool for predicting the natural regeneration density of black spruce and jack pine following fire and salvage

Splawinski¹,

Greene

Gauthier

et al. 2015

The Forestry Chronicle

Self Cite

View full text Add to dashboard Cite

show abstract

Role of wildfire residuals in forest management applications

Perera

Buse²

2014

Ecology of Wildfire Residuals in Boreal Forests

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Strong dispersal limitation in postfire regeneration of Baker cypress, a rare serotinous conifer

McNamara

Greene

Kane

2019

American J of Botany

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Dispersal capacity primarily determines the spatial establishment patterns that drive range expansions and contractions in tree species. Seedling establishment in Baker cypress (Hesperocyparis bakeri [(Jeps.) Bartel]) relies predominantly on fire events, due to its cone serotiny, shade intolerance, and small seeds that require the optimal conditions of fire-exposed, mineral soil seedbeds. METHODS:We quantified the density and spatial distribution of post-disturbance seedlings following the 2014 Eiler Fire in northern California and compared the observed recruitment to predictions from a mechanistic seed dispersal model. RESULTS:Postfire recruitment was dense, averaging 11 seedlings/m 2 , and occurred primarily in the first year after fire. We estimated the mean descent velocity of the wingless seeds as ~4 m/s, the highest value reported for any putatively wind-dispersed tree species. The rapid seed descent contributed to markedly spatially constrained recruitment. Most seedlings (~81%) established within 5 m of the parent tree, and 94% established within 10 m. The maximum observed dispersal distance was 48.5 m; dispersal distance scaled linearly with canopy height. Distributions of modeled seed dispersal distance and observed seedling establishment in Baker cypress did not differ, demonstrating that wind disperses seeds a short distance because of the lack of a wing, and secondary dispersal appeared to be minimal at this recently burned site. CONCLUSIONS:If seed dispersal is solely reliant on wind, migration in response to rapid climate change will be impeded and potentially present difficulties in sustaining populations of this and other obligate seeder species with equally constrained dispersal.

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Seed abscission schedules and the timing of post-fire salvage of Picea mariana and Pinus banksiana

Cited by 28 publications

References 25 publications

A stand-level tool for predicting the natural regeneration density of black spruce and jack pine following fire and salvage

A stand-level tool for predicting the natural regeneration density of black spruce and jack pine following fire and salvage

Role of wildfire residuals in forest management applications

Strong dispersal limitation in postfire regeneration of Baker cypress, a rare serotinous conifer

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