Se identificaron géneros y especies bentónicas del grupo Cyanoprocaryota y de las microalgas Chlorophyceae, y Bacillariophyceae de 17 ríos de Costa Rica, América Central. Las muestras se cultivaron en medios nutritivos sólidos y líquidos con el propósito de observar especies que no aparecieron en las observaciones preliminares. En condiciones naturales, se identificaron cuatro géneros de Cyanoprocaryota, una especie de Chlorophyceae (Scenedesmus dimporphus) y 52 especies y cinco géneros del grupo Bacillariophyceae. En los aislamientos, las siguientes especies de Cyanoprocaryota fueron communes: (Aphanocapsa hyalina, Cyanobium diatomicola, Hapalosiphon fontinalis, Leptolyngbya boryana, Leptolyngbya, Pseudophormidium tenue y Xenococcus sp.), Clorophycea (Chlorella vulgaris, Chlorococcum infusionum, Dilabiphilum printzii, Scenedesmus dimporphus) y Bacillariophyceae (Navicula minima, N. seminulum y Aulacoseira sp.)
Benthic cyanoprocaryota and microalgae (Chlorophyceae and Bacillariophyceae) dominant in rivers of Costa Rica. Samples taken from 17 Costa Rican rivers were analyzed for benthonic Cyanoprocaryota and microalgae (Chlorophyceae and Bacillariophyceae). The samples were observed under the light microscope for species identification, and then cultured with three artificial media: Z8, BG11 and BG110. In the field samples, four genera of Cyanoprocaryota were found; the most common were Phormidium sp. and Scenedesmus dimorphus (Chlorophyceae), there were also five genera and 52 species of Bacillariophyceae. In the isolates, the dominant species were Cyanoprocaryota (Aphanocapsa hyalina, Cyanobium diatomicola, Hapalosiphon fontinalis, Leptolyngbya boryana, Leptolyngbya, Pseudophormidium tenue and Xenococcus sp.), and Clorophyceae (Chlorella vulgaris, Chlorococcum infusionum, Dilabiphilum printzii, Scenedesmus dimporphus), while Bacillariophyceae (Navicula minima, N. seminulum and Aulacoseira) were less frequent.
Cyanoprocaryota y microalgas (Chlorophyceae y Bacillariophyceae) bentónicas dominantes en ríos de Costa Rica
Claudio Sili;Giuseppe Torzillo
2008
Abstract
Benthic cyanoprocaryota and microalgae (Chlorophyceae and Bacillariophyceae) dominant in rivers of Costa Rica. Samples taken from 17 Costa Rican rivers were analyzed for benthonic Cyanoprocaryota and microalgae (Chlorophyceae and Bacillariophyceae). The samples were observed under the light microscope for species identification, and then cultured with three artificial media: Z8, BG11 and BG110. In the field samples, four genera of Cyanoprocaryota were found; the most common were Phormidium sp. and Scenedesmus dimorphus (Chlorophyceae), there were also five genera and 52 species of Bacillariophyceae. In the isolates, the dominant species were Cyanoprocaryota (Aphanocapsa hyalina, Cyanobium diatomicola, Hapalosiphon fontinalis, Leptolyngbya boryana, Leptolyngbya, Pseudophormidium tenue and Xenococcus sp.), and Clorophyceae (Chlorella vulgaris, Chlorococcum infusionum, Dilabiphilum printzii, Scenedesmus dimporphus), while Bacillariophyceae (Navicula minima, N. seminulum and Aulacoseira) were less frequent.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
