The phytoplankton of Lagunas de Ruidera (Natural Park, Ciudad Real, Spain)
The Lagunas de Ruidera Natural Park is a humid zone classified a's of national importance, located in the alto de Guadiana valley, Ciudad Real. Me Park is composed of 15 lagoons separated by travertine barriers, which end in the Peñarroya reservoir This work shows the first published data on bi...
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| Autores principales: | , , , |
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| Formato: | JOUR |
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| Acceso en línea: | http://hdl.handle.net/20.500.12110/paper_02138409_v24_n1-2_p33_Bort |
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| Sumario: | The Lagunas de Ruidera Natural Park is a humid zone classified a's of national importance, located in the alto de Guadiana valley, Ciudad Real. Me Park is composed of 15 lagoons separated by travertine barriers, which end in the Peñarroya reservoir This work shows the first published data on biodiversity, density, biomass and dynamics of phytoplankton (including autotrophic picoplankton) of this system. Samples were collected in May and September 2000 and in March, June, September and December 2001 in the reservoir and in each lagoon (except in those which suffered a dry period). All samples were collectedfrom the epilimnion. The taxonomic study revealed the presence of 215 specie s: 9 taxa o Cyanophyta, 9 of Euglenophyta, 6 of Cryptophyceae, 7 of Dinophyceae, 10 of Chrysophyceae, 58 of Chlorophyta, 103 of Bacillariophyceae, 12 of Desmidiaceae, and a group of small fragellates considered to be a single population. The most common species were: Cyclotella ocellata, Rhodomonas minuta, Cryptomonas erosa, Cyclotella kuetzingiana and Peridinium umbonatum. Me lakes had a high species richness associated with non contaminated places. The functional groups of dominant algae (Reynolds, 1997) were indicative of eutrophic systems: Y (Cryptomonas; small eutrophic lakes), L (Peridinium umbonatum and Ceratium; stratified meso-eutrophic lakes), C (Asterionella formosa and Aulacoseira, mixed eutrophic lakes) dynamics of abundance and composition of phytoplankton biomass was di range was between 0.2 and 7.2 mm3/1, and that of the autotrophic biomass and chlorophyll a concentration in the lagons. However the relative contribution of picoplankton,and algal composition, indicate an alarming eutrophication process. © Asociación Española de Limnología. |
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