Depth related distribution of benthic macrofauna in a Costa Rican crater lake
| dc.creator | Jiménez, Carlos E. | |
| dc.creator | Springer Springer, Monika | |
| dc.date | 2015-10-30 | |
| dc.date.accessioned | 2016-05-03T15:32:24Z | |
| dc.date.available | 2016-05-03T15:32:24Z | |
| dc.description | On two different opportunities the distribution and diversity of the benthic macrofauna was studied at different depths in the Laguna del Cerro Chato erater lake, Alajuela, Costa Rica. For both surveys, the deep samples had signifieantly lower species diversity and evenness than the shallow samples. There was a drop in species diversity and evenness at 6 m, followed by an inerease at 9 m. This pattem is associated with fluctuations in the lake's thermoc\ine. Chironomids were the most abundant organism in both surveys and the genus Chironomus dominaled at all depths. Analysis of the elements Ca, Cu, S, N, Fe, P and percentage of organic matter in the bottom sediments did not show a c\ear bathymetrical distribution. However, al a depth of 9 m the increase in both N content and percentage of organic matter could be related to the increase in abundance of organisms. | en-US |
| dc.description | Se estudió en dos ocasiones la distribución y la diversidad de la macrofauna bentónica en la Laguna del Cerro Chato, Alajuela, Costa Rica. Para ambos muestreos, la diversidad y equitatividad de las especies en las muestras profundas fue siguificantemente menor que en las someras y hubo una disminución bien marcada a los 6 m de profundidad. Las fluctuaciones de la termoclina pueden ser las responsables de esta distribución. Los quironómidos dominaron numéricamente ambos muestreos y Chironomus se distribuyó en todo el gradiente batimétrico. La abundancia de los elementos Ca, Cu, S, N, Fe, P y el porcentaje de materia orgánica en los sedimentos, no mostró una marcada distribución por profundidades,aunque un ligero aumento a 9 m podría estar relacionado con una mayor abundancia de organismos detritivoros. | es-ES |
| dc.format | application/pdf | |
| dc.identifier | http://revistas.ucr.ac.cr/index.php/rbt/article/view/21657 | |
| dc.identifier.uri | https://hdl.handle.net/10669/27254 | |
| dc.language | eng | |
| dc.publisher | Universidad de Costa Rica | en-US |
| dc.rights | acceso abierto | |
| dc.source | Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 44 (2 A) August 1996; 673-678 | en-US |
| dc.source | Revista de Biología Tropical/International Journal of Tropical Biology and Conservation; Vol. 44 (2 A) August 1996; 673-678 | es-ES |
| dc.source | Revista Biología Tropical; Vol. 44 (2 A) August 1996; 673-678 | pt-PT |
| dc.source | 2215-2075 | |
| dc.source | 0034-7744 | |
| dc.subject | volcanic lake | en-US |
| dc.subject | benthos | en-US |
| dc.subject | macrofauna | en-US |
| dc.subject | aquatic insects | en-US |
| dc.subject | chironomids | en-US |
| dc.subject | Costa Rica | en-US |
| dc.title | Depth related distribution of benthic macrofauna in a Costa Rican crater lake | en-US |
| dc.title | Depth related distribution of benthic macrofauna in a Costa Rican crater lake | es-ES |
| dc.type | artículo original |