A model of the post-fire recruitment of Picea mariana and Pinus banksiana as a function of salvage timing and intensity

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

doi:10.1016/j.ecolmodel.2014.03.007

Cited by 10 publications

(32 citation statements)

References 22 publications

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“…Detailed information on the parameterization and limits of the model are available in Splawinski et al (2014). Briefly, the model uses three types of seedbed classes in simulations: good, poor, and lethal.…”

Section: Methodsmentioning

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%

“…The objective of this paper, therefore, is to develop an operational tool using the Splawinski et al (2014) regeneration model that will permit estimation of natural regeneration densities of black spruce and jack pine following moderate to severe fire, either early or late in the growing season, followed by salvage logging. Here we define moderate to severe fires as those that result in 100% tree mortality within a stand and not the intensity of the fire itself.…”

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%

“…As examples of model output, we produce four figures, two of which illustrate simulation results, and two (the assessment tool itself) that can be used in the field by foresters in a fresh burn, perhaps as laminated cards that fit in a shirt pocket for easy use or on a smartphone. Splawinski et al (2014) developed a regeneration model capable of simulating the natural regeneration densities (seedlings/m 2 ) of black spruce and jack pine following fire and salvage at the stand level during the establishment phase (the first six years post-fire). The main parameters are: (1) initial seed availability, computed as a function of source tree basal area, seed survival through the passage of the flaming front, and salvage proportion; (2) seed abscission as a function of time since fire; (3) seedling survivorship as a function of seed mass (germinant size), seedbed proportion, and granivory; (4) the timing of salvage operation; and, (5) seedling and seed mortality as a function of salvage operations.…”

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: Methodsmentioning

confidence: 99%