Identification of sites with a high potential for intensification of wood production 1. Introduction and potential productivity

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Renaud St-Denis
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1 Identification of sites with a high potential for intensification of wood production 1. Introduction and potential productivity Vincent Laflèche ing. f. M.Sc. ECANUSA 2010 congress presentation

2 Presentation plan Part 1 1. Introduction 2. Mandate of the Direction des inventaires forestiers (DIF) of the MRNF 3. Site productivity Part 2 4. Management constraints 5. Spatial analysis 6. Conclusion 2

3 Introduction Commission d étude sur la gestion de la forêt publique québécoise (2004) That the ministry implements an intensive silviculture strategy aiming the increase of wood production.. on high potential sites. Loi sur l aménagement durable du territoire forestier (2010) The ministry determines the criteria allowing the identification of areas with a high forestry potential presenting a particular interest for intensification of wood production. 3

4 Introduction Commission d étude sur la gestion de la forêt publique québécoise (2004) That the ministry implements an intensive silviculture strategy aiming the increase of wood production.. on high potential sites. Loi sur l aménagement durable du territoire forestier (2010) The ministry determines the criteria allowing the identification of areas with a high forestry potential presenting a particular interest for intensification of wood production. 4

5 Mandate of the DIF Identify areas most likely to be assigned as sites with a high potential for intensification of wood production High productivity Low constraints 5

6 Productivity - Factors influencing growth Climatic factors Temperature, precipitations, Site factors Surficial deposit, drainage, Historical factors Competition Natural perturbations (ex-sbw) Potential Reductants 6

7 Productivity - two indexes of potential 1. Conifers and intolerant hardwoods: Site index potential dominant height (m) of a 50 year old stand after correction of growth inhibitions (reductants) Stem analysis developed by DIF 2. Tolerant hardwoods: Increments in tree basal area (TBA potential ) average of best increments per decennial period Developed method by Direction de la recherche forestière of the MRNF 7

8 Productivity - Stem analysis 15 m 13 m m 9 m 7 m Height (m) Adapted from Grondin m 3 m 1,3 m 1 m 0,60 m 0,15 m Age (years) 100 8

9 Productivity - Conifers and intolerant hardwoods Hauteur Height (m) Reductants 4 2 Reductants Âge Uncorrected non corrigé Age Âge Age à (years) 1 m (années)

10 Productivity - Conifers and intolerant hardwoods Hauteur (m) years Uncorrected Âge non corrigé age Corr. Âge corrigé age (juv.opp) opp. juv Âge à 1 m (années)

11 Productivity - Conifers and intolerant hardwoods Hauteur (m) years Corrected age Actual age Âge Uncorrected non corrigé age Âge Corr. corrigé age (juv.opp) opp. juv. Âge Corrected corrigéage Âge à 1 m (années)

12 Productivity - Conifers and intolerant hardwoods IQS potential Hauteur (m) IQS réel Âge Uncorrected non corrigé age Âge Corr. corrigé age (juv.opp) opp. juv. Âge Corrected corrigéage Âge à 1 m (années)

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14 Productivity - Modeling Inventory data (Stem analyses (PAT), Increment cores (PET et PEP)) Vegetation characteristics (Type of stand) Climatic characteristics (Degree day, precipitations, aridity, ) Physical characteristics (Surficial deposit, texture, drainage,.) IQS potential modeling per species Height = f (corrected age, vegetation, climate, physical environment) IQS potential value per species and per ecoforest polygon (stand) 14

15 Productivity - Modeling Inventory data Stand characteristics Inc. TBA modeling per species Vegetation caracteristics Climatic characteristics Physical characteristics Inc. TBA = f (vegetation, climate, physical environment) Inc.TBA potential value per species and per ecoforest polygon (stand) 15

16 IQS pot IQS pot Inc. TBA 16

17 Productivity - Before standardisation 1200 Sugar maple Fréquence Frequency cm 2 /ha/yr \ha\an From Périé 2009

18 Productivity - Before standardisation 1200 Yellow birch Fréquence Frequency cm 2 /ha/yr \ha\an From Périé 2009

19 Productivity - Before standardisation Maple sugar Yellow birch Fréquence Frequency cm 2 /ha/yr \ha\an From Périé 2009

20 Productivity - After standardisation Maple sugar Yellow birch Fréquence Frequency From Périé 2009

21 Productivity - After standardisation Std average Frequency ,6-3,2-2,6-2,2-1,8-1,4-1 -0,6-0,2 0,2 0,6 1 1,4 1,8 2,2 2,6 3 From Périé 2009

22 Productivity - Selection of best sites Knowing the average standardised productivity potential of each polygon of a given territory, it is possible to identify the polygons with the highest potential productivity No. of polygones _ Productivity potential 40% Best sites + Sites with a high potential for intensification of wood production 22

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24 24 APPENDIX

25 1. Comparison of gross values for species in each polygon Polygon PotVeg YB WS BF MOY G std v. IQS std v. IQS std v FE3 MJ1 MJ2 MS1 MS2 RS5 RS Weighted average of std values by relative importance of each species 3. Standardised values per polygon

26 Productivité - Modèle Modèle IQS pot Végétations potentielles résineuses RB1 : Pessière blanche ou cédrière issue d agriculture RB2 : Pessière blanche maritime RB3 : Pessière blanche ou sapinière à épinette blanche subalpine RB5 : Pessière blanche issue de broutage RC3 : Cédrière tourbeuse à sapin RE1 : Pessière noire à lichens RE2 : Pessière noire à mousses ou à éricacées RE3 : Pessière noire à sphaignes RE4 :Pessière noire à mousses ou à éricacées montagnarde RE7 : Pessière noire maritime RP1 : Pinède blanche ou pinède rouge RS1 : Sapinière à thuya RS2 : Sapinière à épinette noire RS3 : Sapinière à épinette noire et sphaignes RS4 : Sapinière à épinette noire montagnarde RS5 : Sapinière à épinette rouge 26 RS7 : Sapinière à épinette noire maritime RT1 : Prucheraie Résineux et feuillus tolérants SAB, EPB, BOP, THO EPB EPB, SAB EPB, SAB, BOP THO, SAB EPN, PIG EPN, PIG EPN EPN, PIG EPN, SAB SAB, PET, PIB SAB, THO SAB, EPN, BOP SAB, EPN SAB, EPN SAB, BOP, EPR, EPB SAB, EPN SAB

27 27 Sère physiographique

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