Harvest and dispersal syndromes influence the probability of tree seedling establishment in the eastern United States

Sparbanie, Taylor M.; Snell, Rebecca S.

doi:10.1111/geb.13600

Global Ecol Biogeogr

2022

DOI: 10.1111/geb.13600

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Harvest and dispersal syndromes influence the probability of tree seedling establishment in the eastern United States

Taylor M. Sparbanie

Rebecca S. Snell

Abstract: Aim:The goal of this work was to investigate the influence of disturbance, in particular tree harvesting, on seedling establishment rates both within and beyond the range extent of individual species. In addition, we considered how disturbances differentially affect seedling establishment depending on the dispersal syndromes and shade tolerance of species.Location: This project covers the eastern forests of the USA.

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Cited by 2 publications

References 59 publications

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Multi‐cohort survival of northern red oak seedlings at a northern hardwood forest transition

Cleavitt,

Battles,

Matthes

et al. 2024

Ecosphere

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Global change has created less stable forest systems and given urgency to understanding limitations to the establishment of tree seedlings beyond current range boundaries. We quantified trends in 13 years of annual northern red oak (QURU) seedling survival data for 1733 marked individuals at a local species distribution boundary within the northern hardwood forest in New Hampshire, USA. Over the study period, the median distance of seedlings into the valley did not change, although there was a net gain of 89 plots (5 m2) occupied. For a subset of seedlings that were marked in their year of birth (N = 937), we examined relationships among terrain, vegetation community, and initial individual seedling traits, and evaluated their effects on time to seedling mortality using a parametric accelerated failure time model. The year of seedling germination had the largest effect on survival with increasing mortality rates for seedlings from more recent cohorts. Seedlings had longer survival times where oak seedling densities were lower, shrub cover was higher, and when the acorn remained attached. Additionally, survival time was increased in higher elevation plots, which were also located further into the valley. Interannual seedling survival (N = 1580) was strongly impacted by seedling condition in the previous year, particularly leaf number and amount of leaf damage. Most seedling deaths occurred over winter, and seedlings failed to break bud the following spring. Interannual variation in seasonal climate, particularly deep, heavy snowpack in 2019 followed by drought conditions in 2020, coincided with recent elevated mortality. Overall, the median survival time of 3–4 years and the rapid turnover of the oak seedling population currently limit ability for expansion, although the net gain of occupied plots and increase in survival at higher elevation plots with lower QURU densities present some mechanisms that could promote expansion if the current suboptimal understory conditions shift to favor QURU.

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Multi‐cohort survival of northern red oak seedlings at a northern hardwood forest transition

Cleavitt,

Battles,

Matthes

et al. 2024

Ecosphere

View full text Add to dashboard Cite

show abstract

Regeneration of an endangered plant species endemic to the remote mountain areas: Anthropogenic disturbance matters

Wu,

Lyu,

Xiao

et al. 2025

Forest Ecology and Management

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Harvest and dispersal syndromes influence the probability of tree seedling establishment in the eastern United States

Cited by 2 publications

References 59 publications

Multi‐cohort survival of northern red oak seedlings at a northern hardwood forest transition

Multi‐cohort survival of northern red oak seedlings at a northern hardwood forest transition

Regeneration of an endangered plant species endemic to the remote mountain areas: Anthropogenic disturbance matters

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