Quantification of reef benthos communities and variability inherent to the monitoring using video transect method
| Autor: | Fernanda Duarte Amaral, Carla Alecrim Colaço Ramos, Eduardo Marocci Chaves, Ruy Kenji Papa de Kikuchi, Gabriel Rivas de Melo |
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| Rok vydání: | 2008 |
| Předmět: |
geography
geography.geographical_feature_category Videotape Recording General Medicine Coral reef Management Monitoring Policy and Law Anthozoa Pollution Monitoring program Oceanography Benthos Benthic zone Environmental monitoring Environmental science Animals Transect Reef Bay Brazil General Environmental Science Environmental Monitoring |
| Zdroj: | Environmental monitoring and assessment. 162(1-4) |
| ISSN: | 1573-2959 |
| Popis: | Long-term monitoring program of organisms is the most recommended for understanding changing processes on reefs. The video transect method presents advantages for that. Specialists state that it is important to make sure that the recorded coverage is always the same between campaigns, so that differences in results may be entirely attributed to environmental changes. This study aimed to test the capability of implementing this requirement through tracking simulation and its validity for monitoring the benthic communities of reefs using the video transect method. Ten transects 20 m long were established in Todos os Santos Bay coral reefs. Subsequent to the first transect capture, a second diver repeated the same track, simulating two different monitoring campaigns. Data were transformed and a matrix of similarity was generated using Bray-Curtis' Index. ANOSIM analysis was performed to test the similarity of the ten transects and its repetitions. The result, R = 0.08 (P = 0.928), shows that reef monitoring using video transect, the way it is described in the literature, is appropriate, but it is important to consider some premises discussed in this work. |
| Databáze: | OpenAIRE |
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