scholarly journals Peer Review #2 of "Competitive interactions between a nonmycorrhizal invasive plant, Alliaria petiolata, and a suite of mycorrhizal grassland, old field, and forest species (v0.1)"

2015 ◽  
Keyword(s):  
Peer Review ◽  
Invasive Plant ◽  
Alliaria Petiolata ◽  
Competitive Interactions ◽  
Forest Species ◽  
Old Field

Competitive Interactions of Garlic Mustard (Alliaria petiolata) and Damesrocket (Hesperis matronalis)

2012 ◽  
Vol 5 (1) ◽  
pp. 27-36 ◽  
Author(s):  
Stacey A. Leicht-Young ◽  
Noel B. Pavlovic ◽  
Jean V. Adams
Keyword(s):  
Interspecific Competition ◽  
Invasive Plant ◽  
Interspecific Interactions ◽  
Full Range ◽  
Alliaria Petiolata ◽  
Competitive Interactions ◽  
Life History Strategies ◽  
Garlic Mustard ◽  
Negative Effect ◽  
Density Ratios

AbstractCompetitive interactions between native plants and nonnative, invasive plant species have been extensively studied; however, within degraded landscapes, the effect of interspecific interactions among invasive plants is less explored. We investigated a competitive interaction between two sympatric, invasive mustard species that have similar life history strategies and growth forms: garlic mustard and damesrocket. Greenhouse experiments using a full range of reciprocal density ratios were conducted to investigate interspecific competition. Garlic mustard had a negative effect on the final biomass, number of leaves, and relative growth rate in height of damesrocket. Survival of damesrocket was not negatively affected by interspecific competition with garlic mustard; however, garlic mustard showed higher mortality because of intraspecific competition. These results indicated that although garlic mustard has been observed to be the dominant species in this landscape, it may not completely outcompete damesrocket in all situations. Studies of invasive species in competition are important in degraded landscapes because this is the common situation in many natural areas.

scholarly journals Competitive Interactions of Flowering Rush (Butomus umbellatus L.) Cytotypes in Submersed and Emergent Experimental Aquatic Plant Communities

Diversity ◽  
2020 ◽  
Vol 12 (1) ◽  
pp. 40 ◽  
Author(s):  
Nathan E. Harms
Keyword(s):  
Plant Communities ◽  
Invasive Plants ◽  
Aquatic Plant ◽  
Invasive Plant ◽  
Common Garden ◽  
Competitive Interactions ◽  
Depth Gradient ◽  
Common Garden Experiments

The ability to invade communities in a variety of habitats (e.g., along a depth gradient) may facilitate establishment and spread of invasive plants, but how multiple lineages of a species perform under varying conditions is understudied. A series of greenhouse common garden experiments were conducted in which six diploid and four triploid populations of the aquatic invasive plant Butomus umbellatus L. (Butomaceae) were grown in submersed or emergent conditions, in monoculture or in a multispecies community, to compare establishment and productivity of cytotypes under competition. Diploid biomass overall was 12 times higher than triploids in the submersed experiment and three times higher in the emergent experiment. Diploid shoot:root ratio was double that of triploid plants in submersed conditions overall, and double in emergent conditions in monoculture. Relative interaction intensities (RII) indicated that triploid plants were sixteen times more negatively impacted by competition under submersed conditions but diploid plants were twice as impacted under emergent conditions. Recipient communities were similarly negatively impacted by B. umbellatus cytotypes. This study supports the idea that diploid and triploid B. umbellatus plants are equally capable of invading emergent communities, but that diploid plants may be better adapted for invading in submersed habitats. However, consistently lower shoot:root ratios in both monoculture and in communities suggests that triploid plants may be better-adapted competitors in the long term due to increased resource allocation to roots. This represents the first examination into the role of cytotype and habitat on competitive interactions of B. umbellatus.

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