Exploratory Survey of Salamanders in Pennsylvanian Forests with Dense Understories of Berberis thunbergii (Japanese Barberry), an Invasive Shrub

2020 ◽  
Vol 27 (2) ◽  
pp. 299
Author(s):  
Ryan M. Utz ◽  
Melanie N. Fetsko
Keyword(s):  
Berberis Thunbergii ◽  
Invasive Shrub ◽  
Japanese Barberry ◽  
Exploratory Survey

Dendrochonological Potential of Japanese Barberry (Berberis thunbergii): A Case Study in the Black Rock Forest, New York

2008 ◽  
Vol 64 (2) ◽  
pp. 115-124 ◽  
Author(s):  
Jinbao Li ◽  
Chengyuan Xu ◽  
Kevin L. Griffin ◽  
William S. F. Schuster
Keyword(s):  
New York ◽  
Berberis Thunbergii ◽  
Japanese Barberry

scholarly journals Seedling Populations Produced by Colored-leaf Genotypes of Japanese Barberry (Berberis thunbergii DC.) Contain Seedlings with Green Leaf Phenotype

2006 ◽  
Vol 24 (3) ◽  
pp. 133-136
Author(s):  
Jonathan M. Lehrer ◽  
Mark H. Brand ◽  
Jessica D. Lubell
Keyword(s):  
Green Leaf ◽  
Potential Contribution ◽  
Yellow Leaf ◽  
Berberis Thunbergii ◽  
Leaf Color ◽  
Landscape Plant ◽  
Japanese Barberry ◽  
Leaf Phenotype ◽  
Purple Leaf ◽  
Color Phenotype

Abstract The leaf color of seedling populations derived from ornamental genotypes of Japanese barberry (Berberis thunbergii DC.) was evaluated to determine whether nursery selections of this important landscape plant could be expected to produce green-leaf progeny or seedlings with leaf color resembling the purple-leaf or yellow-leaf parent. This is a compelling inquiry since nearly all B. thunbergii plants found within invasive populations possess green foliage and the potential contribution of seedlings by ornamental purple-and yellow-leaf genotypes is unknown. Seed lots collected from cultivated barberry genotypes located in landscape settings were processed and raised in a greenhouse to observe leaf color phenotype. It was found that all genotypes studied produced at least some green seedlings. The percentage of green progeny produced varied widely by genotype. Green-leaf cultivars yielded close to 100% green seedlings and all purple-and yellow-leaf forms produced at least 20% green offspring. Among purple-leaf genotype accessions located adjacent to potential purple-leaf pollen donors, var. atropurpurea produced significantly fewer green seedlings (18.5%) than ‘Crimson Pygmy’ (71%) and ‘Rose Glow’ (45%). ‘Rose Glow’ individuals growing adjacent to other purple Japanese barberry forms produced significantly fewer green seedlings (45%) than ‘Rose Glow’ accessions that were isolated from additional purple Japanese barberry (88%). This study demonstrates that some invasive green-leaf B. thunbergii could be derived from popular garden forms since purple- and yellow-leaf genotypes readily produce green-leaf offspring which resemble feral barberry. These findings do not, however, provide any definitive link between cultivated and naturalized Japanese barberry.

scholarly journals Four Cultivars of Japanese Barberry Demonstrate Differential Reproductive Potential under Landscape Conditions

HortScience ◽  
2006 ◽  
Vol 41 (3) ◽  
pp. 762-767 ◽  
Author(s):  
Jonathan M. Lehrer ◽  
Mark H. Brand ◽  
Jessica D. Lubell
Keyword(s):  
Seed Production ◽  
Invasive Plant ◽  
Germination Rate ◽  
Reproductive Potential ◽  
Dry Weight ◽  
Seedling Vigor ◽  
Berberis Thunbergii ◽  
Invasive Potential ◽  
Japanese Barberry ◽  
Landscape Plants

While japanese barberry (Berberis thunbergii DC.) is an acknowledged invasive plant naturalized throughout the eastern and northern U.S., the danger posed by its popular horticultural forms is unknown and controversial. This work analyzed the reproductive potential and seedling growth of four ornamental genotypes important to the nursery industry. Fruit and seed production was quantified in 2001, 2002, and 2003 for multiple landscape plants of B.t. var. atropurpurea, `Aurea', `Crimson Pygmy', and `Rose Glow'. The average number of seeds produced per landscape specimen ranged from lows of 75 and 90 for `Aurea' and `Crimson Pygmy' to 2968 for var. atropurpurea and 762 for `Rose Glow'. Seed production relative to canopy surface area for `Rose Glow' was similar to `Aurea' and `Crimson Pygmy' and all three cultivars were less prolific than var. atropurpurea in this regard. Cleaned and stratified seeds from var. atropurpurea, `Crimson Pygmy' and `Rose Glow' showed an average greenhouse germination rate of 70% to 75%, while `Aurea' yielded 46% germination. A subpopulation of seedlings from each genotype accession was grown further outdoors in containers for a full season to ascertain seedling vigor and development. The vigor of 1-year-old seedlings, as measured by dry weight of canopy growth, for progeny derived from `Aurea' (0.70 g) and `Crimson Pygmy' (0.93 g) was significantly less than var. atropurpurea (1.20 g) and `Rose Glow' (1.33 g). These results demonstrate that popular japanese barberry cultivars express disparate reproductive potential that, after further study, may be correlated with invasive potential. Some popular commercial cultivars may pose significantly less ecological risk than others.

Controlling Japanese barberry (Berberis thunbergii DC) in southern New England, USA

2009 ◽  
Vol 257 (2) ◽  
pp. 561-566 ◽  
Author(s):  
Jeffrey S. Ward ◽  
Thomas E. Worthley ◽  
Scott C. Williams
Keyword(s):  
New England ◽  
Berberis Thunbergii ◽  
Southern New England ◽  
Japanese Barberry

Effectiveness of Two-Stage Control Strategies for Japanese Barberry (Berberis thunbergii) Varies by Initial Clump Size

2010 ◽  
Vol 3 (1) ◽  
pp. 60-69 ◽  
Author(s):  
Jeffrey S. Ward ◽  
Scott C. Williams ◽  
Thomas E. Worthley
Keyword(s):  
Initial Treatment ◽  
Prescribed Burning ◽  
Treatment Effectiveness ◽  
Control Strategies ◽  
Effective Control ◽  
Invasive Shrub ◽  
Japanese Barberry ◽  
Canadian Provinces ◽  
Clump Size

AbstractJapanese barberry is listed as an invasive shrub in 20 states and four Canadian provinces. Control of Japanese barberry was evaluated using several two-step processes over 16 mo using a total of 1,100 clumps at six study areas. Initial treatments in spring (prescribed burning, mechanical mowing with a brush saw or rotary wood shredder) reduced the size of established barberry clumps. Follow-up treatments in midsummer to kill new ramets that developed from surviving root crowns were foliar applications of triclopyr or glyphosate, directed heating with a propane torch, and untreated controls. Mortality was defined as the absence of ramets from a root crown and not the mortality of individual ramets of a given clump. Clump mortality and size of new ramets did not differ among initial treatments. However, larger clumps had higher survival and larger sprouts than smaller clumps 16 mo after initial treatment. Effectiveness of follow-up treatments varied by clump size. Two follow-up treatments of directed heating using propane torches were as effective as herbicides for clumps that were initially smaller than 120 cm. For clumps with pretreatment sizes of 120 cm and larger, clump mortality following herbicide treatments (90%) and directed heating (65%) was greater than for clumps that had no follow-up treatments (35%). Although clump sizes did not differ between follow-up methods 1 yr after treatment, both follow-up treatments resulted in smaller clumps than untreated controls. Effective control of Japanese barberry can be achieved in a single growing season by integrating an early-season initial treatment (prescribed fire or mechanical) that kills the aboveground tissues with a midseason follow-up treatment such as directed heating or targeted herbicide application.

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
Keyword(s):  
Berberis Thunbergii ◽  
Tree Seedling ◽  
Invasive Shrub ◽  
Native Tree
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