The Wider Caribbean Region is an important tourist destination where agricultural, industrial and shipping activities are also carried on. Coastal zones are heavily populated and receive a high human pressure; however, few monitoring programmes allow assessing long-term anthropogenic impact trends in these areas, which are especially useful for integrated management programs. Through the support of the International Atomic Energy Agency (project RLA/7/012), sediment core activities of 210Pb and 137Cs were used to evaluate changes in sedimentation rates in 11 relevant coastal areas of the region, where environmental information is scarce, but needed to support national environmental policies. Most 210Pb activity profiles were atypical, attributed to non-steady sedimentation conditions; whereas 137Cs activity profiles, showing very low values, were of little help for 210Pb-dating corroboration. Results evidenced conspicuous changes in mass accumulation rates (MAR), specially through the Anthropocene (i.e. since ~1950s) in most cases, attributed to deforestation and land erosion (one of the clearest indicators of global change), and the input of urban and industrial untreated wastes. The recent MAR decrease in Havana Bay (Cuba) was attributed to the implementation of environmental policies, which showed that 210Pb-derived reconstruction of environmental changes is also useful to verify the effectiveness of management programs to control land-derived erosion and siltation issues. Since siltation can be detrimental to valuable coastal resources around the world, retrospective evaluations of sedimentation rates, based on 210Pb-dated cores, are highly recommended to assist integrated coastal zone management programs in the region and elsewhere.

中文翻译：

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大加勒比地区210Pb的沉积物积累速率。

大加勒比海地区是重要的旅游目的地，这里也进行农业，工业和航运活动。沿海地区人口稠密，承受着巨大的人力压力；但是，很少有监测计划能够评估这些地区的长期人为影响趋势，这对综合管理计划特别有用。在国际原子能机构（项目RLA / 7/012）的支持下，使用210Pb和137Cs的沉积物核心活动评估了该地区11个相关沿海地区的沉积率变化，这些地区缺乏环境信息，但需要支持国家环境政策。大多数210Pb的活动曲线是非典型的，这归因于不稳定的沉积条件。而137Cs活性曲线显示出非常低的值，对于210Pb日期的确证没有什么帮助。结果表明，在大多数情况下，特别是通过人类世（即自1950年代以来），特别是通过人类世，质量累积率（MAR）发生了明显变化，这归因于森林砍伐和土地侵蚀（全球变化最清晰的指标之一）以及城市和工业的投入未经处理的废物。哈瓦那湾（古巴）最近的MAR下降是由于执行环境政策所致，这表明210Pb衍生的环境变化重建也有助于验证管理程序控制土地衍生的侵蚀和淤积问题的有效性。由于淤积可能有害于世界各地宝贵的沿海资源，因此基于210Pb年代的岩心对沉积速率进行回顾性评估，