科研之友
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摘要
Festuca paniculata communities in Valle d%26apos;Aosta (N.W. Italy) can contribute to the definition of the geographic boundaries between the western Alps phytosociological associations, due to their intermediate position between Insubrian and inner-alpine communities. In order to describe the phytosociology and syntaxonomy of F. paniculata communities in the study area, 17 original releves data were analyzed. The communities were referred to Junipero-Festucetum spadiceae juniperetosum nanae, previously described in the Meje-Ecrins-Pelvoux Massif (France). Our results exclude the presence in Valle d%26apos;Aosta of Centaureo uniflorae-Festucetum spadiceae, supposed by previous works, and define in Colma di Mombarone (Biella and Torino districts) the western boundary of the Insubrian association Polygalo chamaebuxi-Festucetum paniculatae. The border between Junipero-Festucetum spadiceae and Polygalo chamaebuxi-Festucetum paniculatae is in accordance to differences in continentality conditions, that divide the outer areas of the Insubrian region from the subcontinental and continental zones of Valle d%26apos;Aosta.
- 出版日期2012-3
