Coral Reef Evaluation and Monitoring Project Dry Tortugas 2016

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，CREMP）的宗旨为监测佛罗里达礁岛群国家海洋保护区（Florida Keys National Marine Sanctuary，FKNMS）内选定珊瑚礁的现状与变化趋势。自1996年起，项目组每年在固定监测点位开展CREMP评估，所采集的数据可反映底栖生物覆盖度（benthic cover）、石珊瑚（stony corals）及相关海洋动植物的多样性随时间的动态变化。核心野外调查方法始终为水下摄像法（underwater videography）与定时珊瑚物种清点（timed coral species inventories）。本报告呈现的调查结果涵盖两类采样数据：一是1996年至2008年间在佛罗里达礁岛群的37个点位的109个监测站数据，二是1999年至2008年间在德赖托图格斯群岛（Dry Tortugas）的采样数据。报告分析了2007年与2008年间主要底栖类群（benthic taxa）的盖度百分比差异，涉及类群包括石珊瑚、八放珊瑚（octocorals）、海绵（sponges）及大型藻类（macroalgae）；同时统计了珊瑚物种平均丰富度（mean coral species richness）与石珊瑚异常状况发生情况（incidence of stony coral conditions）。此外，报告还探究了主要底栖类群、五种珊瑚类群（*Montastraea cavernosa*、*Colpophyllia natans*、*Siderastrea siderea*及*Porites astreoides*）以及穿贝海绵（Cliona delitrix）的长期变化趋势。该项目是南佛罗里达持续时间最长的珊瑚礁监测项目之一，在记录近年发生的生态动态变化方面具有极高的重要性。