Abstract Background Alpine alder vegetation acts upon the nearby grass and dwarf shrub vegetation by the nitrogen supply from the symbiotic bacteria Frankia alni of Alnus viridis. This has been studied in two transects concerning plant distribution. plant diversity. nitrate concentration in soil and photosynthetic performance of specific marker plants. https://www.parisnaturalfoodes.shop/product-category/hard-unbleached-bread-flour/