Vertical distribution of epiphyton biomass and diversity in a shallow lake during contrasting ecosystem regimes
| Autor: | Maria Cristina Claps, María Gabriela Cano, María Adela Casco |
|---|---|
| Rok vydání: | 2013 |
| Předmět: |
Biomass (ecology)
biology Ecology Water Movements Sampling (statistics) EPIPHYTON Plant Science Bulrush Aquatic Science Schoenoplectus californicus biology.organism_classification VERTICAL DISTRIBUTION Ciencias de la Tierra y relacionadas con el Medio Ambiente SHALLOW LAKE SCHOENOPLECTUS CALIFORNICUS Ciencias Medioambientales Period (geology) Environmental science Ecosystem Physical geography Sample collection CIENCIAS NATURALES Y EXACTAS |
| Zdroj: | Aquatic Botany. 110:38-47 |
| ISSN: | 0304-3770 |
| Popis: | We investigated seasonal and depth variations in biomass and composition of bulrush-associated epiphyton in a shallow seepage lake in Argentina and examined whether differences existed in the vertical profiles between sites, whether the zonation with respect to depth changed according to different regimes of the ecosystem, and what conditions most greatly affected the epiphyton vertical distribution. We performed sample collection every 4 weeks for one year at both the centre and the periphery of the bulrush stand, sectioned the bulrush stems into segments to give a fixed 7-level vertical profile, and recorded the water physicochemical characteristics over the same profile. The epiphyton vertical variations were similar at both sampling locations.The epiphyton-biomass profiles underwent an abrupt change at a depth of 45-65. cm during the clear-water period, while comparable values were recorded along the profiles during the turbid phase. The temperature had a positive effect during late spring-early summer that coincided with the transitional period and beginning of the clear period.The principal driver of the epiphyton-biomass vertical distribution is the light availability, followed by the exposure to water movements. The resident species with high contributions to the overall biovolume were related to the percentage of incident light, and particularly those community members that were predominant in the clear-water period. Fil: Cano, Maria Gabriela. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Casco, Maria Adela. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Claps, Maria Cristina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Limnología "Dr. Raúl A. Ringuelet". Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Instituto de Limnología; Argentina |
| Databáze: | OpenAIRE |
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