Author ORCID Identifier

http://orcid.org/0000-0001-7084-4311

Document Type

Article

Publication Title

Canadian Journal of Forest Research

Abstract

Seedling establishment is crucial for the development of self-regenerating tree populations. Determinants of tree establishment vary widely and may compound in their effects. Using a factorial experiment, we manipulated invasive shrubs, downed woody debris (DWD), and rodent access to evaluate factors limiting the establishment of six woody species (five native trees, one invasive shrub). Our results suggest these factors independently contribute to tree seedling establishment. Exclusion of rodents increased establishment threefold. Invasive shrub removal (Elaeagnus umbellata; Lonicera maackii) and the presence of DWD promoted establishment of two native trees (Pinus strobus; Sassafras albidum). Notably, the presence of DWD halved L. maackii establishment. In identifying rodents as drivers of seed limitation, our results support findings that seed additions will likely promote woody seedling establishment when rodents are not abundant (e.g., low populations) or when seeds are physically or chemically protected (e.g., via taste deterrents). Management plans vary in DWD retention; results from our experimental cohort indicate retaining or introducing DWD promotes native tree recruitment and limits invasive shrub establishment. Future studies exploring the species-specific effects of invasive shrub removal and DWD amendments across multiple cohorts will help determine which woody species benefit most from these management practices.

Pages

421-430

html

DOI

https://doi.org/10.1139/cjfr-2023-0131

Volume

54

Issue

4

Publication Date

4-2024

Keywords

tree regeneration, seedling establishment, invasive shrubs, woody debris, seed predators

Disciplines

Biology

Comments

This is the version of the manuscript that has been accepted for publication. The Version of Record is available from:

Brian Connolly, Chad Zirbel, and John Orrock. 2024. Rodent-mediated seed limitation affects woody seedling establishment more than invasive shrubs and downed woody debris. Canadian Journal of Forest Research. 54(4): 421-430. https://doi.org/10.1139/cjfr-2023-0131

ISSN

1208-6037

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