Occurrence of Arbuscular Mycorrhizal Herbs Decreases Selectively in Communities Dominated by Invasive Tree Acer negundo.

We tested whether one of the consequences predicted for alien plant invasion by the mutualism disruption hypothesis was true in the case of the ash-leaved maple Acer negundo L. The study aimed to determine whether the occurrences of mycorrhizal and nonmycorrhizal herbs varied similarly or differently in communities with varying degrees of A. negundo dominance.

High canopy cover of invasive Acer negundo L. affects ground vegetation taxonomic richness.

We assessed the link between canopy cover degree and ground vegetation taxonomic richness under alien ash-leaved maple (Acer negundo) and other (native or alien) tree species. We investigated urban and suburban forests in the large city of Yekaterinburg, Russia. Forests were evaluated on two spatial scales.

[The correction of biological defects in bronchial asthma patients by the methods of Chinese medicine].

42 patients with bronchial asthma underwent combined treatment according to 8 methods of classical Chinese medicine. Partial and complete immediate and long-term responses were achieved in 81% of the patients with asthma diagnosed by Chinese criteria as cold and mixed. Satisfactory results were recorded in 19% of hot bronchial asthma cases.