科研之友
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摘要
A collection of bryophytes in the Tigray province of northern Ethiopia reveals 29 taxa (7 liverworts, 22 mosses), among them four - Barbula tenuirostris, Didymodon validus, Entosthodon pulchellus, Lindbergia patentifolia - new for Ethiopia. The high proportion of morphological well adapted xerothalloid Marchantiidae and xeropottiod Pottiaceae impressively demonstrate the harsh site conditions in the area for most of the year. %26lt;br%26gt;In addition, a first phytosociological study of the epiphytic bryophyte vegetation is carried out in the dry evergreen Afromontane forest and grassland complex, which give evidence for two communities: (1) a Fabronia abyssinica community typical for the Olea europaea subsp. cuspidata fragments (lower montane belt), and (2) a Syntrichia fragilis community of the Olea-Juniperus procera woodland (upper montane belt). Both communities remain rankless at the moment, however, might be classified within the holarctic Syntrichion laevipilae alliance. %26lt;br%26gt;First remarks on the life forms and life strategies (functional types) of the main species indicate the xeric site conditions and give insight in dispersal, habitat colonization and habitat maintenance.
- 出版日期2012-11
