Coral Reef Evaluation and Monitoring Project Dry Tortugas 2004

The purpose of the Coral Reef Evaluation and Monitoring Project (CREMP) is to monitor the status and trends of selected reefs in the Florida Keys National Marine Sanctuary(FKNMS). CREMP assessments have been conducted annually at fixed sites since 1996 and data collected provides information on the temporal changes in benthic cover and diversity of stony corals and associated marine flora and fauna. The core field methods continue to be underwater videography and timed coral species inventories. Findings presented in this report include data from 109 stations at 37 sites sampled from 1996 through 2008 in the Florida Keys and 1999 through 2008 in the Dry Tortugas. The report describes the annual differences (between 2007 and 2008) in the percent cover of major benthic taxa (stony corals, octocorals, sponges, and macroalgae), mean coral species richness and the incidence of stony coral conditions. Additionally, it examines the long-term trends of the major benthic taxa, five coral complex, Montastraea cavernosa, Colpophyllia natans, Siderastrea siderea, and Porites astreoides) and the clionaid sponge, Cliona delitrix. It is one of the longest running coral reef monitoring projects in south Florida and has been extremely important in documenting the temporal changes that have occurred in recent years.珊瑚礁评估与监测项目（Coral Reef Evaluation and Monitoring Project，简称CREMP）的核心目标，是对佛罗里达群岛国家海洋保护区（Florida Keys National Marine Sanctuary，简称FKNMS）内选定珊瑚礁的现状与变化趋势开展长期监测。自1996年起，该项目每年均在固定监测点位开展标准化评估，所采集的数据集可完整反映石珊瑚及相关海洋动植物的底栖覆盖度与物种多样性随时间的动态变化。项目核心野外调查方法始终为水下摄像法与定时珊瑚物种清点调查。本报告呈现的监测结果，涵盖佛罗里达群岛区域1996至2008年、德赖托图格斯群岛区域1999至2008年期间，对37个点位的109个监测站的采样数据。报告详细阐述了2007至2008年间，主要底栖类群（包括石珊瑚、八放珊瑚、海绵以及大型藻类）的覆盖占比、珊瑚物种平均丰富度，以及石珊瑚健康状况发生情况的年度差异。此外，报告还分析了主要底栖类群、五大珊瑚类群（含巨脑珊瑚（Montastraea cavernosa）、纳坦陀螺珊瑚（Colpophyllia natans）、侧星珊瑚（Siderastrea siderea）以及星孔珊瑚（Porites astreoides）），以及穿贝海绵（Cliona delitrix）的长期变化趋势。本项目是南佛罗里达地区持续运行时间最长的珊瑚礁监测项目之一，在记录近年珊瑚礁生态系统的时间序列变化方面发挥了至关重要的作用。