The use of ground penetrating radar for remote sensing the organic layer – mineral soil interface in paludified boreal forests

Laamrani, Ahmed; Valeria, Osvaldo; Cheng, Li Zhen; Bergeron, Yves; Camerlynck, Christian

doi:10.5589/m13-009

Cited by 19 publications

(22 citation statements)

References 44 publications

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“…Slope is a significant factor, both at fine [76] and coarser scales [75]. In these studies, we confirmed that the organic layer accumulates more slowly on steeper slopes than on flat terrains.…”

Section: The Landscape Levelsupporting

confidence: 81%

“…As clearcutting and prescribed burning are not viable options for forest management within the current legislative environment, we are testing other site preparation techniques that could similarly affect the soil. To support the selection of the most appropriate soil preparation techniques, we recently demonstrated the feasibility of using ground penetrating radar as a method to detect organic layer thickness [75].…”

Section: The Stand/plot Levelmentioning

confidence: 99%

“…However, we showed that even sites with significant slopes (from a regional perspective) can also accumulate thick organic layers given enough time. In addition to slope, topographic position influences paludification rates, with more accumulation occurring on plateaus [75,77], resulting in an unusual relationship between elevation and paludification.…”

Section: The Landscape Levelmentioning

confidence: 99%

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Managing Understory Vegetation for Maintaining Productivity in Black Spruce Forests: A Synthesis within a Multi-Scale Research Model

Thiffault

Fenton

Munson

et al. 2013

Forests

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Sustainable management of boreal ecosystems involves the establishment of vigorous tree regeneration after harvest. However, two groups of understory plants influence regeneration success in eastern boreal Canada. Ericaceous shrubs are recognized to rapidly dominate susceptible boreal sites after harvest. Such dominance reduces OPEN ACCESSForests 2013, 4 614 recruitment and causes stagnant conifer growth, lasting decades on some sites. Additionally, peat accumulation due to Sphagnum growth after harvest forces the roots of regenerating conifers out of the relatively nutrient rich and warm mineral soil into the relatively nutrient poor and cool organic layer, with drastic effects on growth. Shifts from once productive black spruce forests to ericaceous heaths or paludified forests affect forest productivity and biodiversity. Under natural disturbance dynamics, fires severe enough to substantially reduce the organic layer thickness and affect ground cover species are required to establish a productive regeneration layer on such sites. We succinctly review how understory vegetation influences black spruce ecosystem dynamics in eastern boreal Canada, and present a multi-scale research model to understand, limit the loss and restore productive and diverse ecosystems in this region. Our model integrates knowledge of plant-level mechanisms in the development of silvicultural tools to sustain productivity. Fundamental knowledge is integrated at stand, landscape, regional and provincial levels to understand the distribution and dynamics of ericaceous shrubs and paludification processes and to support tactical and strategic forest management. The model can be adapted and applied to other natural resource management problems, in other biomes.

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Section: The Landscape Levelsupporting

confidence: 81%

Section: The Stand/plot Levelmentioning

confidence: 99%

Section: The Landscape Levelmentioning

confidence: 99%

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Managing Understory Vegetation for Maintaining Productivity in Black Spruce Forests: A Synthesis within a Multi-Scale Research Model

Thiffault

Fenton

Munson

et al. 2013

Forests

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“…The latter is generally characterized by flat plains, which were generated by extensive and thick glaciolacustrine clay deposits that were left behind by pro-glacial Lake Ojibway [26]. Three major soil types are found in the study area, Luvisols, Gleysols, and Organic soils [27]; the mineral soil beneath the organic layer is variable, ranging in composition from clay to till [28][29][30]. The underlying bedrock is a complex mixture of Precambrian granitic rock types that occasionally appears at the ground surface and form scattered gentle hills across the landscape.…”

Section: Study Areamentioning

confidence: 99%

“…These three locations will henceforth be referred to in this study as M, Q and V, for Matagami, Lebel-sur-Quévillon; and Villebois, respectively (Table 1). In each location, measurements from three replicate plots were done in each of three stands having different OLT corresponding to one of three categories of increasing paludification: null to low (0-25 cm); low to moderate (26-65 cm); and high (>65 cm); this classification scheme was inspired by previous studies over the Clay Belt region [28,29,33]. These three classes (0-25 cm; 26-65 cm; and >65 cm) are thereafter referred to as OLT classes A, B and C, respectively.…”

Section: Site Selectionmentioning

confidence: 99%

Effect of Organic Layer Thickness on Black Spruce Aging Mistakes in Canadian Boreal Forests

Laamrani¹,

DesRochers²,

Blackburn³

2016

Forests

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Boreal black spruce (Picea mariana) forests are prone to developing thick organic layers (paludification). Black spruce is adapted to this environment by the continuous development of adventitious roots, masking the root collar and making it difficult to age trees. Ring counts above the root collar underestimate age of trees, but the magnitude of age underestimation of trees in relation to organic layer thickness (OLT) is unknown. This age underestimation is required to produce appropriate age-correction tools to be used in land resource management. The goal of this study was to assess aging errors that are done with standard ring counts of trees growing in sites with different degrees of paludification (OLT; 0-25 cm, 26-65 cm, >65 cm). Age of 81 trees sampled at three geographical locations was determined by ring counts at ground level and at 1 m height, and real age of trees was determined by cross-dating growth rings down to the root collar (root/shoot interface). Ring counts at 1 m height underestimated age of trees by a mean of 22 years (range 13-49) and 52 years (range 14-112) in null to low vs. moderately to highly paludified stands, respectively. The percentage of aging-error explained by our linear model was relatively high (R 2 adj = 0.71) and showed that OLT class and age at 0-m could be used to predict total aging-error while neither DBH nor geographic location could. The resulting model has important implications for forest management to accurately estimate productivity of these forests.

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Goal Oriented Soil Mapping

Pereira

Brevik

Oliva

et al. 2017

Soil Mapping and Process Modeling for Sustainable Land Use Management

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The use of ground penetrating radar for remote sensing the organic layer – mineral soil interface in paludified boreal forests

Cited by 19 publications

References 44 publications

Managing Understory Vegetation for Maintaining Productivity in Black Spruce Forests: A Synthesis within a Multi-Scale Research Model

Managing Understory Vegetation for Maintaining Productivity in Black Spruce Forests: A Synthesis within a Multi-Scale Research Model

Effect of Organic Layer Thickness on Black Spruce Aging Mistakes in Canadian Boreal Forests

Goal Oriented Soil Mapping

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