| Titre : |
The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain |
| Type de document : |
Tiré à part de revue |
| Auteurs : |
Esperança Gacia i Passola ; Enric Ballesteros (1958-) |
| Année de publication : |
1996 |
| Importance : |
57-59 |
| Langues : |
Anglais (eng) |
| Catégories : |
[Géographique] Baciver
[Géographique] Pyrénées
[Thématique] Communautés hygrophiles (eau dormante)
[Thématique] Enjeux de conservation des lacs d'altitude
[Thématique] Lac d'altitude
[Thématique] Monitoring, suivi
[Thématique] Neige
[Thématique] Rôle de la lumière en physiologie végétale
[Thématique] Semis
|
| Mots-clés : |
Isoetes lacustris L. |
| Résumé : |
Ten months after flooding lake Baciver, water levels were 5.5 m higher than the previous normal and the area formally occupied by the Isoetes population was reduced. All Isoetes originally present below 0.6 m died, and only plants standing between 5.8 and 6.1 m (new depth) survived. As irradiance decreased, remaining individuals produced fewer leaves, but their biomass production was higher, as leaf length increased in response to the diminished available irradiance. Because leaf mortality was excessive, regeneration capacity, popula- tion performance and dynamics were adversely affected. In 1992, no new production occurred in Isoetes lacustris individu- als surviving after the winter. We suggest that low surface oxy- gen levels at the water column under the ice, and total anoxia below 6 m depth, caused the demise of the I. lacustris population in Lake Baciver. |
Gacia i Passola, E., Ballesteros, E.,
1996
- The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain ; Journal of Aquatic Plant Management, 34 : 57-59.
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Affiner la recherche Générer le flux rss de la recherche
Partager le résultat de cette rechercheCartographie et matérialisation des stations aquatiques de Isoetes lacustris et Subularia aquatica (2002)
Le Subularia aquatica L., les Isoëtes Brochoni Motelay et Lacustris L. dans les lacs du bassin de la Haute-Ariège et du bassin limitrophe de Lanous (Pyr.-Or.) in Revue de Botanique, 12 (140-141) (09/1894)
The effect of increased water level on Isoetes lacustris L. in lake Baciver, Spain (1996)
Aperçu général de la végétation lacustre dans les Pyrénées (1892)
