Succession, climate and neighbourhood dynamics influence tree growth over time: an 87‐year record of change in a<i>Pinus resinosa</i>‐dominated forest, Minnesota,<scp>USA</scp>

Curzon, Miranda T.; D’Amato, Anthony W.; Fraver, Shawn; Huff, Emily S.; Palik, Brian J.

doi:10.1111/jvs.12471

Cited by 5 publications

(5 citation statements)

References 69 publications

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“…Furthermore, red pine stand density is positively linked to drought susceptibility both at the scale of individual trees (Curzon et al. 2016) and stands (Gleason et al. 2017), with denser stands less resistant and resilient to drought (Magruder et al.…”

Section: Discussionmentioning

confidence: 99%

“…Higher pine stand densities, increased fuel loads, and ladder fuels will increase the severity of the next fire to burn in these stands and potentially convert long-lived red pine woodlands to forest conditions more reflective of severe, standreplacing fires such as aspen or jack pine. Furthermore, red pine stand density is positively linked to drought susceptibility both at the scale of individual trees (Curzon et al 2016) and stands (Gleason et al 2017), with denser stands less resistant and resilient to drought (Magruder et al 2013. The current status of nearly every red pine-dominated stand we surveyed included negligible red pine regeneration, higher stand density than at any point in recent centuries, a transition to non-red pine species, and fuel loads more amenable to catastrophic stand-replacing fire than maintenance surface fire, reflecting findings in other red pinedominated landscapes (Meunier et al 2019a).…”

Section: Red Pine Forest Types Cannot Be Perpetuated Without Firementioning

confidence: 99%

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Human augmentation of historical red pine fire regimes in the Boundary Waters Canoe Area Wilderness

et al. 2021

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The Border Lakes Region of Minnesota and Ontario has long been viewed as a firedependent ecosystem. High-severity fire in the region's near-boreal forests has been a focus of ecological research and public fascination. However, the surface fire history within this transnational wilderness landscape has received more limited attention. We used an interdisciplinary, dendroecological approach to characterize the surface fire history of the region, assess potential drivers of historical surface fires, and document the ecological legacies of frequent fires within the red pine forests of the Boundary Waters Canoe Area Wilderness (BWCAW) in northern Minnesota. We used tree-ring and fire atlas data to reconstruct multi-century surface fire records for 101 sites and document age structure and composition at 32 sites across the BWCAW. Stratification of these sites relative to their proximity to a primary travel and trade corridor used first by Indigenous groups and later by Euro-American fur traders through the late 1800s provided strong evidence of human augmentation of fires. The patterns of fire activity, fire-climate relationships, and forest development indicate that traditional landuse by Anishinaabeg (Ojibwe) increased rates of local surface fire and played an important role in shaping the landscape. The decline of traditional subsistence practices by the Border Lakes Anishinaabeg coincided with a sharp decline in surface fires and a period of abundant tree establishment. In the absence of repeat surface fires, many red pine sites have shifted in composition, increased in stem density, and grown vulnerable to forest-type conversion through future high-severity fire. These results highlight the need for active fire reintroduction to red pine forests of the Great Lakes Region and underscore the importance of collaboration and guidance from Indigenous Knowledge Keepers in this process. A blended knowledge approach to fire restoration that directly engages with Indigenous perspectives and cultural practices can perpetuate the distinctive character of the largest remaining tracts of long-lived pine forest in the Great Lakes Region. Carefully developed fire restoration practices would enhance the visitor use experience within one of the most frequently visited wilderness areas in the United States while re-engaging directly with Indigenous knowledge and traditional cultural practices.

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Section: Discussionmentioning

confidence: 99%

Section: Red Pine Forest Types Cannot Be Perpetuated Without Firementioning

confidence: 99%

Human augmentation of historical red pine fire regimes in the Boundary Waters Canoe Area Wilderness

et al. 2021

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“…They also suggest that this mechanism stops operating at the sapling survival stage (given the prevalence of null models for this life cycle phase), but this could be due to analytical limitations such as insufficient statistical power (small number of saplings) or the lack of separability (with almost all saplings surviving or dying). Nevertheless, previous reports also point to sapling survival being indifferent to biological neighbourhood (Comita et al, 2014;Curzon et al, 2017;Metz et al, 2010;Velázquez et al, 2016).…”

Section: Consequences For Diversity Maintenancementioning

confidence: 87%

“…Specifically, conspecific neighbours generally affect the spadistribution of sapling density to somewhat larger distances (15 m) than for seed bank and seed rain densities. Therefore, it appears that seed and sapling densities in the vicinity of conspecific trees are not driven by the same processes (Curzon et al, 2017).…”

Section: Patterns Of Neighbourhood Interactionsmentioning

confidence: 98%

“…For example, adult trees of some canopy species may create understorey conditions unsuitable or adverse for the establishment of their own offspring in their vicinity (Mejía-Domínguez et al, 2011). Moreover, the specific requirements of a tree change through its ontogeny, so that seedlings and saplings do not necessarily perform well under the crowns of parental trees (Curzon et al, 2017;Piao et al, 2013;Quero et al, 2008;Wenny, 2000). In theory, NDD and niche differentiation need not be mutually exclusive in fostering heterospecific replacements, because their actions do not necessarily interfere with each other.…”

Section: Introductionmentioning

confidence: 99%

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Using spatial patterns of seeds and saplings to assess the prevalence of heterospecific replacements among cloud forest canopy tree species

Mejía‐Domínguez

Meave

Díaz-Ávalos

et al. 2021

J Vegetation Science

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Questions:To gain insights into the role of species-by-species replacements in cloud forest community structuring, we asked: (1) What are the effects of the spatial distribution of standing individuals on the seed rain, soil seed bank, and sapling density and survival in this cloud forest?; and (2) What is the prevalence of conspecific vs heterospecific replacements in the regeneration of this forest?Location: Santo Tomás Teipan, Oaxaca State, southern Mexico. Methods:In a 1-ha cloud forest plot, we assessed seed rain, seed bank, and sapling density and survival of four canopy tree species (Chiranthodendron pentadactylon, Cornus disciflora, Quercus laurina and Oreopanax xalapensis). All standing individuals of these and other tree species (diameter at breast height [DBH] ≥ 2.5 cm) were mapped.We used neighbourhood models to examine the spatial patterns of the three life cycle stages relative to the spatial distribution of adults. The neighbourhood effect was assessed through the Neighbourhood Index, which integrates information on size (DBH) and distance to adults. Data analysis was based on maximum likelihood and model selection procedures. Results:We found large between-species differences regarding the spatial patterns of seeds and saplings. Three species showed evidence for the Janzen-Connell effect operating at the seed (Chiranthodendron pentadactylon and Quercus laurina) or sapling (Oreopanax xalapensis) stage. We also found support for a critical role of specific microsite factors (i.e. niche differentiation) in the regeneration of two species (Chiranthodendron pentadactylon and Cornus disciflora). Conclusions:Seed and sapling distribution patterns suggest the prevalence of heterospecific replacements and that both Janzen-Connell and niche differentiation effects contribute to this pattern. Our results largely support the notion that the prevalence of heterospecific replacements among canopy species promotes species co-existence in cloud forests.

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Physiology, Growth, and Acclimatizing of Boreal Tree Species to Climate

Kellomäki

2022

Management of Boreal Forests

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Succession, climate and neighbourhood dynamics influence tree growth over time: an 87‐year record of change in aPinus resinosa‐dominated forest, Minnesota,USA

Cited by 5 publications

References 69 publications

Human augmentation of historical red pine fire regimes in the Boundary Waters Canoe Area Wilderness

Human augmentation of historical red pine fire regimes in the Boundary Waters Canoe Area Wilderness

Using spatial patterns of seeds and saplings to assess the prevalence of heterospecific replacements among cloud forest canopy tree species

Physiology, Growth, and Acclimatizing of Boreal Tree Species to Climate

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