In:
Revue d'Écologie (La Terre et La Vie), PERSEE Program, Vol. 71, No. 2 ( 2016), p. 129-141
Abstract:
On a new station of Damasonium alisma subsp. polyspermum (Coss.) Maire (Alismataceae) in Algeria : syntaxonomy and implications of conservation. The authors describe a new site of Damasonium alisma subsp. polyspermum recently discovered at Ain Bessem in the plain of Arib. They analyse the flora and vegetation of temporary pools of this site and of Tiaret (Sersou). The phytosociological study, with 12 relevés made by the Braun-Blanquet method, of plant communities dominated physiognomically by D. alisma subsp. polyspermum allows the identification of two associations, Ranunculetum baudotii (Ranunculion aquatilis), which is a poor basal group dominated by buttercup (Ranunculus baudotii and R. trichophyllus), and Damasonio polyspermi-Crypsidetum aculeati (Verbenion). The insertion in a syntaxonomic system of both associations is stated. The typical aspect of the Elatinetum macropodae (Isoetion), described more than fifty years ago in the pond of Tasselent at Tiaret, no longer exists, after the confirmed destruction of this pond. Rare taxa were not found (Marsilea strigosa, Antinoria agrostidea, Ranunculus batrachioides, Elatine macropoda, Isoetes velata subsp. dubia, Riella sersuensis), except D. alisma subsp. polyspermum which seems resilient to disturbance. The obtained results highlight the need for the establishment of protection measures for both these taxa and the ponds hosting these hydrophytic plant communities of great patrimonial value (landscape value, phytocoenotic value, richness in protected and rare taxa), but seriously threatened by human impacts.
Type of Medium:
Online Resource
ISSN:
0249-7395
DOI:
10.3406/revec.2016.1835
Language:
French
Publisher:
PERSEE Program
Publication Date:
2016
detail.hit.zdb_id:
2922565-6
SSG:
12
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