Trees Tree of Heaven (Ailanthus altissima)

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            Trees 
     Tree of Heaven
  ...Vegetation Structure 
and DiversityLoss of structure and diversity may lead ...- Presence of Ailanthus has been shown t ...- Ailanthus appears to suppress native v ...-  Pine barrens invaded by hardwood tree ... - Ailanthus would be expected to have l ...Bird Diversity and Abundance- Rather than being a direct cause of bi ...- "...nests of the Willow Flycatcher (Em ...Insect Diversity - Ecological theory suggests that invas ...Historic Structures- Ailanthus was shown to spread aggressi ... - Anecdotal evidence is abundant that a ...Historic Landscape - Ailanthus would not have been present ...Direct Effects on People - Pollen of ailanthus is a demonstrated ...
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Trees
Tree of Heaven
(Ailanthus altissima)
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- Presence of Ailanthus has been shown to reduce species diversity on average (Mediterranean sites) (Vila et al., 2006).;

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- Ailanthus appears to suppress native vegetation by competition and allelopathic effects and the establishment of pure stands implies strong effects on community structure (Kowarik and Saumel 2007). Specific studies relevant to mid-Atlantic region include:
- Allelopathic compounds appear to reduce extension growth and biomass of seedlings of sugar maple (A. saccharum) and northern red oak (Q. rubra) but proximity to ailanthus enhanced growth of red maple seedlings (A. rubrum) possibly due to ailanthus-induced increase in soil nitrogen (Gomez-Aparicio and Canham, 2007)
- Ailanthus outcompetes black locust (R. psuedoacacia) (Call & Nilsen, 2005) User Link