Coral Reef Evaluation and Monitoring Project Dry Tortugas 2010

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，是对佛罗里达群岛国家海洋保护区（Florida Keys National Marine Sanctuary, FKNMS）内选定礁体的现状与变化趋势开展长期监测。自1996年起，该项目便在固定监测点位开展年度评估工作，所采集的数据集可用于揭示石珊瑚、伴生海洋动植物的底栖覆盖度与物种多样性随时间推移的动态变化。核心野外调查方法一直采用水下摄像与定时珊瑚物种普查。本报告呈现的调研结果，涵盖1996至2008年佛罗里达群岛区域37个点位的109个监测站采样数据，以及1999至2008年德赖托图格斯群岛的相关采样数据。报告阐述了2007至2008年间，主要底栖分类群（石珊瑚、八放珊瑚、海绵及大型藻类）的覆盖百分比、珊瑚物种平均丰富度，以及石珊瑚异常状况发生频次的年度差异。此外，报告还分析了主要底栖分类群、五类珊瑚类群（包括*Montastraea cavernosa*、*Colpophyllia natans*、*Siderastrea siderea*以及*Porites astreoides*），以及穿孔海绵*Cliona delitrix*的长期变化趋势。该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，在记录近年生态系统随时间演变的过程中发挥了至关重要的作用。