Curso de Pós-Graduação em Ecologia e Biomonitoramento, Instituto de Biologia, Universidade Federal da Bahia, Av. Ademar de Barros, Campus de Ondina, Salvador, Bahia, 40170-290, Brazil.
Environ Monit Assess. 2010 Mar;162(1-4):95-101. doi: 10.1007/s10661-009-0778-z. Epub 2009 Feb 21.
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.
长期的生物监测计划是了解珊瑚礁变化过程的最推荐的方法。视频带方法具有优势。专家指出，重要的是要确保在每次活动之间记录的覆盖范围始终相同，以便可以将结果差异完全归因于环境变化。本研究旨在通过跟踪模拟来测试实施该要求的能力，并测试使用视频带方法监测珊瑚礁底栖生物的有效性。在 Todos os Santos 湾的珊瑚礁中建立了 10 条 20 米长的带。在第一次带捕获后，第二位潜水员重复了相同的轨迹，模拟了两个不同的监测活动。对数据进行转换，并使用 Bray-Curtis 指数生成相似性矩阵。使用 ANOSIM 分析来测试十个带及其重复的相似性。结果，R = 0.08（P = 0.928）表明，按照文献中的描述使用视频带进行珊瑚礁监测是合适的，但重要的是要考虑到本工作中讨论的一些前提条件。
