Article (Scientific journals)
Ecology And Conservation Of Belgian Populations Of Viola Calaminaria, A Metallophyte With A Restricted Geographic Distribution
Bizoux, Jean-Philippe; Brevers, F.; Meerts, P. et al.
2004In Belgian Journal of Botany, 137 (1), p. 91-104
Peer reviewed
 

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Keywords :
rare species; conservation; ecogeography; Viola calaminaria
Abstract :
[en] Viola calaminaria (Gingins) Lej. is a rare and threatened species, endemic to metalliferous soils in E Belgium, S Netherlands and W Germany. In order to provide basic information for a conservation strategy, we performed an ecogeographic survey of almost all V. calaminaria populations currently existing in Belgium. Twenty-four populations were found, distributed in three geographic groups all in the Province of Liège. The area covered by V. calaminaria ranged from < 1 m2 to 3.2 ha. The largest populations were found in sites contaminated by atmospheric deposits from metal smelters. Soils were extremely variable in heavy metal and nutrient concentrations, but concentrations of Zn, Pb and Cd were consistently higher than reference values for normal soils. V. calaminaria was most often found in association with other metallophyte and pseudometallophyte taxa typical of metalliferous sites. Plant communities identified by TWINSPAN analysis generally fitted the heavy metal associations previously described but two unusual heavy metal plant communities were identified. Based on a canonical correspondence analysis, pH was the only factor that was clearly correlated with the floristic composition of plant communities associated to V. calaminaria. This study confirmed the ecological endemic status of V. calaminaria and the importance of the conservation of metalliferous sites.
Disciplines :
Environmental sciences & ecology
Author, co-author :
Bizoux, Jean-Philippe ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Brevers, F.
Meerts, P.
Graitson, Eric ;  Université de Liège - ULiège > aCREA
Mahy, Grégory ;  Université de Liège - ULiège > Gembloux Agro-Bio Tech
Language :
English
Title :
Ecology And Conservation Of Belgian Populations Of Viola Calaminaria, A Metallophyte With A Restricted Geographic Distribution
Publication date :
2004
Journal title :
Belgian Journal of Botany
ISSN :
0778-4031
eISSN :
1781-8656
Publisher :
Société Royale de Botanique de Belgique, Belgium
Volume :
137
Issue :
1
Pages :
91-104
91-104
Peer reviewed :
Peer reviewed
Funders :
F.R.S.-FNRS - Fonds de la Recherche Scientifique [BE]
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