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Mutualism-disrupting allelopathic invader drives carbon stress and vital rate decline in a forest perennial herb.

Brouwer NL, Hale AN, Kalisz S - AoB Plants (2015)

Bottom Line: Over a single growing season, the loss of RFS could reduce a plant's photosynthetic physiology and carbon storage.Alliaria-treated plants exhibit significant overall reductions in total non-structural carbohydrates and have 17 % less storage carbohydrates relative to controls.Together, our results are consistent with the hypothesis that disruption of a ubiquitous mutualism following species invasion creates symptoms of carbon stress for species dependent on RFS.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA brouwern@gmail.com.

No MeSH data available.


Related in: MedlinePlus

Effect of Alliaria on Maianthemum flowering frequency. (A) Mean difference (effect size, ES) in flowering frequency in Alliaria-ambient and removal plots. Effect size is expressed as an OR and plotted on the log scale. (B) Annual mean flowering frequencies for both treatments and ANOVA trend contrasts. Error bars represent ±95 % CIs. Asterisk indicates a significant effect of Alliaria removal (P < 0.05).
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PLV014F3: Effect of Alliaria on Maianthemum flowering frequency. (A) Mean difference (effect size, ES) in flowering frequency in Alliaria-ambient and removal plots. Effect size is expressed as an OR and plotted on the log scale. (B) Annual mean flowering frequencies for both treatments and ANOVA trend contrasts. Error bars represent ±95 % CIs. Asterisk indicates a significant effect of Alliaria removal (P < 0.05).

Mentions: There is no significant difference in flowering probability across treatments for the first 6 years of the Alliaria removal (e.g. Fig. 3; P2006 = 0.65, P2007 = 0.29, P2008 = 0.42). However, by 2012 the flowering probability is ‘leaning’ (sensuTukey 1991) in the predicted direction (OR = 1.72, CI95% = 0.84–3.52, P = 0.14) and by 2013 is significantly higher (OR = 1.96 CI95% = 1.0–3.87, P = 0.051) in the removal treatment. Across all years (2006–13) there is an increasing trend in flowering probability in the removal treatment (trend contrast P = 0.00008) but no increase in the ambient treatment (Ptrend = 0.57).


Mutualism-disrupting allelopathic invader drives carbon stress and vital rate decline in a forest perennial herb.

Brouwer NL, Hale AN, Kalisz S - AoB Plants (2015)

Effect of Alliaria on Maianthemum flowering frequency. (A) Mean difference (effect size, ES) in flowering frequency in Alliaria-ambient and removal plots. Effect size is expressed as an OR and plotted on the log scale. (B) Annual mean flowering frequencies for both treatments and ANOVA trend contrasts. Error bars represent ±95 % CIs. Asterisk indicates a significant effect of Alliaria removal (P < 0.05).
© Copyright Policy - creative-commons
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4374104&req=5

PLV014F3: Effect of Alliaria on Maianthemum flowering frequency. (A) Mean difference (effect size, ES) in flowering frequency in Alliaria-ambient and removal plots. Effect size is expressed as an OR and plotted on the log scale. (B) Annual mean flowering frequencies for both treatments and ANOVA trend contrasts. Error bars represent ±95 % CIs. Asterisk indicates a significant effect of Alliaria removal (P < 0.05).
Mentions: There is no significant difference in flowering probability across treatments for the first 6 years of the Alliaria removal (e.g. Fig. 3; P2006 = 0.65, P2007 = 0.29, P2008 = 0.42). However, by 2012 the flowering probability is ‘leaning’ (sensuTukey 1991) in the predicted direction (OR = 1.72, CI95% = 0.84–3.52, P = 0.14) and by 2013 is significantly higher (OR = 1.96 CI95% = 1.0–3.87, P = 0.051) in the removal treatment. Across all years (2006–13) there is an increasing trend in flowering probability in the removal treatment (trend contrast P = 0.00008) but no increase in the ambient treatment (Ptrend = 0.57).

Bottom Line: Over a single growing season, the loss of RFS could reduce a plant's photosynthetic physiology and carbon storage.Alliaria-treated plants exhibit significant overall reductions in total non-structural carbohydrates and have 17 % less storage carbohydrates relative to controls.Together, our results are consistent with the hypothesis that disruption of a ubiquitous mutualism following species invasion creates symptoms of carbon stress for species dependent on RFS.

View Article: PubMed Central - PubMed

Affiliation: Department of Biological Sciences, University of Pittsburgh, Pittsburgh, PA 15260, USA brouwern@gmail.com.

No MeSH data available.


Related in: MedlinePlus