To manage or not? Successful native tree seedling restoration despite a dense, invasive shrub, Berberis thunbergii

Plant Ecology ◽  
2019 ◽  
Vol 220 (6) ◽  
pp. 577-593 ◽  
Author(s):  
Arthur F. Link ◽  
Linda M. K. Johnson ◽  
Ryan M. Utz
2018 ◽  
Vol 11 (1) ◽  
pp. 20-26 ◽  
Author(s):  
Arthur F. Link ◽  
Trey Turnblacer ◽  
Cierra K. Snyder ◽  
Sarah E. Daugherty ◽  
Ryan M. Utz

AbstractInvasive plants may dramatically impact forest ecosystems by establishing dense populations and suppressing the recruitment of native tree species. One invasive shrub currently spreading throughout eastern deciduous forests of North America, Japanese barberry (Berberis thunbergii DC), may be limiting tree recruitment in stands where it invades. Once established, B. thunbergii becomes densely populated within forest understories and suppresses native plants by competing for limited resources, altering soil conditions, and changing the understory microclimate. To quantify native seedling inhibition caused by B. thunbergii invasion, we conducted an observational study on seedling abundance within forest plots that were either invaded or not invaded by B. thunbergii and used survey data to generate Bayesian models of native seedling densities along gradients of increasing B. thunbergii stem counts and aboveground plant dry mass. Model outputs predicted that B. thunbergii–invaded plots had 82% lower seedling densities compared with uninvaded plots. Native tree seedling densities were very low even in areas with moderate B. thunbergii density, suggesting that reduced tree seedling densities are observed even at low densities of invasion. Our findings indicate that forests invaded with B. thunbergii harbor substantially lower densities of native tree seedlings, with potentially significant long-term consequences for forest ecological integrity, biodiversity, and ecosystem services.


NeoBiota ◽  
2020 ◽  
Vol 56 ◽  
pp. 73-88
Author(s):  
Ryan M. Utz ◽  
Alysha Slater ◽  
Hannah R. Rosche ◽  
Walter P. Carson

Monospecific stands of invasive plants can dramatically restructure habitat for fauna, thereby elevating population densities or promoting foraging of consumer species who benefit in the altered habitat. For example, dense stands of invasive plants may protect small mammals from predators, which in turn could increase foraging pressure on seeds that small mammals feed upon. We used a before-after, control-impact experimental design to test whether small mammal capture rates were higher and giving-up densities (GUDs) lower beneath dense stands of Berberis thunbergii, an invasive shrub with a rapidly expanding range throughout eastern North America. Our experimental design included three plot categories: 1) plots heavily invaded by B. thunbergii, 2) control plots lacking invasive shrub cover, and 3) invaded plots where we eradicated B. thunbergii midway through the study. Although our overall small mammal capture rate was low, small mammal captures were 65% higher in B. thunbergii invaded habitat relative to control plots and eradication lowered capture rates by 77%. GUDs were also 26% higher within B. thunbergii relative to control plots and eradication decreased GUDs by 65%. Our findings suggest that small mammals perceive dense stands of B. thunbergii as relatively safe foraging habitat. Prior surveys within our study locations revealed dramatically depressed tree seedling densities under B. thunbergii, thus invasive plants may promote intensive foraging by small mammals and reduce recruitment for species with foraged seeds or seedlings.


NeoBiota ◽  
2017 ◽  
Vol 36 ◽  
pp. 17-38 ◽  
Author(s):  
Kris French ◽  
Sharon Robinson ◽  
Liza Smith ◽  
Eva Watts
Keyword(s):  

2014 ◽  
Vol 68 (1) ◽  
pp. 33-45 ◽  
Author(s):  
A. C. Medeiros ◽  
E. I. von Allmen ◽  
C. G. Chimera

2016 ◽  
Vol 25 (4) ◽  
pp. 509-515 ◽  
Author(s):  
Ana P. Moreira da Silva ◽  
Daniella Schweizer ◽  
Henrique Rodrigues Marques ◽  
Ana M. Cordeiro Teixeira ◽  
Thaiane V. M. Nascente dos Santos ◽  
...  

2004 ◽  
Vol 12 (3) ◽  
pp. 412-418 ◽  
Author(s):  
Claudia Alvarez-Aquino ◽  
Guadalupe Williams-Linera ◽  
Adrian C. Newton

2013 ◽  
Vol 304 ◽  
pp. 192-203 ◽  
Author(s):  
André Terwei ◽  
Stefan Zerbe ◽  
Achim Zeileis ◽  
Peter Annighöfer ◽  
Heike Kawaletz ◽  
...  

2017 ◽  
Vol 37 (4) ◽  
pp. 540-548 ◽  
Author(s):  
Jessica R. Peebles-Spencer ◽  
David L. Gorchov

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