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Título: | Composition, distribution and biomass of benthic macrophyte communities from lake Baciver, a Spanish alpine lake in the Central Pyrenes |
Autor: | Ballesteros, Enric CSIC ORCID ; Gacia, Esperança CSIC ORCID ; Camarero, Lluís | Fecha de publicación: | 1989 | Editor: | Cambridge University Press | Citación: | Annales de Limnologie - International Journal of Limnology 25(2) : 177-184 (1989) | Resumen: | Species composition, distribution and biomass of benthic macrophyte communities have been studied in a high mountain, oligotrophic, softwater lake from the Central Pyrenees. Isoetids (Isoetes lacustris L., Isoetes setacea Lam., Subularia aquatica L. and Eleocharis acicularis (L.) Roemer & Schultes) are the dominant macrophytes in areas over 2-3 meters in depth. Natopotamids (Sparganium angustifolium Michx.) are restricted to shallow waters. Algae (Nitella gracilis (Smith) Agardh) only predominate in deep waters. Three main communities have been distinguished : the Sparganium angustifolium community (160 g dwt m-2), the Isoetes lacustris community (120-460 g dwt m-2) and the Nitella gracilis community (11 g dwt m-2). Biomass differences between shallow and deep water Isoetes populations have been attributed to ice-scour stress. Neither irradiance nor slope can explain the lower boundaries observed in the distribution of vascular plants ; sediment features may be responsible for them. Mean lake macrophyte biomass amounts to 140 g dwt m-2 (20 g C -2), a very high value if compared with boreal lakes with similar limnological characteristics. | Versión del editor: | https://doi.org/10.1051/limn/1989017 | URI: | http://hdl.handle.net/10261/170429 | ISSN: | 0003-4088 | E-ISSN: | 2100-000X |
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