Marine Corps Base Camp Lejeune Greenness Loss from 1984 to 2009

Critical military training and testing on lands along the nation’s coastal and estuarine shorelines are increasingly placed at risk because of development pressures in surrounding areas, impairments due to other anthropogenic disturbances, and increasing requirements for compliance with environmental regulations. The U.S. Department of Defense (DoD) intends to enhance and sustain its training and testing assets and to optimize its stewardship of natural resources through the development and application of an ecosystem-based management approach on DoD installations. To accomplish this goal, particularly for installations in estuarine/coastal environments, the Strategic Environmental Research and Development Program (SERDP) launched the Defense Coastal/Estuarine Research Program (DCERP) as a minimum 10-year effort at Marine Corps Base Camp Lejeune (MCBCL) in North Carolina. The results of the first six years of the program (DCERP1) are presented here. The overarching objectives of DCERP are to: (1) understand the effects of military training activities, infrastructure development, and other coastal military installations; (2) develop models, tools, and indicators to evaluate ecosystem health; and (3) recommend adaptive management strategies to sustain ecosystem natural resources within the context of an active military installation. This data package contains loss of Green Vegetation data between 1984 and 2009 from Landsat TM5 images. Results are based on the difference in the Tassle Cap greenness band recorded in 1984 to the greenness recorded in 2009. This Intensity of green loss was then developed into a five category green loss classification using the mean and standard deviation of the green loss difference data set, standardized to the 1984-2007 time period: 0. No green loss, green gain, or background 1. No significant change; values > 0 to =< 0.0035 (mean - SD) 2. Light green loss, reduced forest, impacted veg, etc; values > 0.0035 to =< 0.04556 (mean) 3. Moderate green loss; values > 0.04556 to =< 0.0876 (mean + SD) 4. Heavy green loss; values > 0.0876 to max. Classes 2,3, and 4 are retained as significant green loss locations. Polygon patches are labeled with the intensity value in the attribute 'GRIDCODE'. Greenness loss in this area is a good indicator of human impact and development.美国沿海与河口沿岸区域的关键军事训练与试验活动，正日益面临多重风险：周边区域开发压力加剧、其他人为活动造成的生态损害，以及日益严格的环境合规要求。美国国防部（U.S. Department of Defense, DoD）旨在通过在其军事设施中开发并应用基于生态系统的管理模式，强化并维持其训练与试验资产，同时优化自然资源管理工作。为实现这一目标，尤其是针对河口/沿海环境中的军事设施，美国战略环境研究与发展计划（Strategic Environmental Research and Development Program, SERDP）在北卡罗来纳州的勒琼海军陆战队基地（Marine Corps Base Camp Lejeune, MCBCL）启动了国防沿海/河口研究计划（Defense Coastal/Estuarine Research Program, DCERP），该项目计划至少持续10年。本文呈现了该项目前六年（即DCERP1阶段）的研究成果。 DCERP的总体目标包括：(1) 明晰军事训练活动、基础设施建设及其他沿海军事设施的生态影响；(2) 开发用于评估生态系统健康状况的模型、工具与指标；(3) 提出适应性管理策略，以在现役军事设施的运营背景下，维持生态系统的自然资源可持续性。 本数据包包含基于陆地卫星TM5（Landsat TM5）影像提取的1984年至2009年绿地植被损失数据。研究结果基于1984年与2009年记录的缨帽变换（Tassle Cap）绿度波段差值。随后，基于标准化至1984-2007年时段的绿地损失差值数据集的均值与标准差，将绿地损失强度划分为5个等级： 0. 无绿地损失、绿地增加或背景噪声； 1. 无显著变化，取值范围为>0至≤0.0035（均值-标准差）； 2. 轻度绿地损失，表现为森林减少、植被受干扰等，取值范围为>0.0035至≤0.04556（均值）； 3. 中度绿地损失，取值范围为>0.04556至≤0.0876（均值+标准差）； 4. 重度绿地损失，取值范围为>0.0876至最大值。 等级2、3、4被认定为存在显著绿地损失的区域。多边形斑块的属性字段"GRIDCODE"中标注了其强度等级值。该区域的绿地损失程度可有效反映人类活动影响与开发强度。