Recent increases in human pressure and forest loss threaten many Natural World Heritage Sites
ABSTRACT：Natural World Heritage Sites (NWHS), via their formal designation through the United Nations, are globally recognized as containing some of the Earth's most valuable natural assets. Understanding changes in their ecologicalcondition is essential for their ongoing preservation. Here we use two newly available globally consistent datasets that assess changes in human pressure (Human Footprint) and forest loss (Global Forest Watch) over timeacross the global network of terrestrial NWHS. We show that human pressure has increased in 63% of NWHS since 1993 and across all continents except Europe. The largest increases in pressure occurred in Asian NWHS,many of which were substantially damaged such as Manas Wildlife Sanctuary. Forest loss occurred in 91% ofNWHS that contain forests, with a global mean loss of 1.5% per site since 2000, with the largest areas of forestlost occurring in the Americas. For example Wood Buffalo National Park and Río Plátano Biosphere Reserve lost 2581 km2 (11.7%) and 365 km2 (8.5%) of their forest respectively. We found that on average human pressure increased faster and more forest loss occurred in areas surrounding NWHS, suggesting they are becoming increasingly isolated and are under threat from processes occurring outside their borders.While some NWHS such as the Sinharaja Forest Reserve and Mana Pools National Park showed minimal change in forest loss or human pressure,they are in the minority and our results also suggest many NWHS are rapidly deteriorating and are more threatened than previously thought.
KEYWORDS：World Heritage;Habitat loss;Habitat fragmentation;Human Footprint;Forest loss;Monitoring;Cumulative threat mapping;Biodiversity conservation
世界自然遗产通过联合国命名，有利于保护地球上一些宝贵的自然资源，本文通过长时间跨度的数据集，评估人类活动和森林损失在全球网络中的变化。本文从人类活动和森林状况入手，分析了在自然遗产区域人类压力和森林覆盖的变化。
方法
为了比较NWHS与周围环境的人类足迹的平均变化，本研究计算了NWHS与周围10公里缓冲区的1993年至2009年人类足迹的平均变化。对于森林覆盖的变化，本文使用了Google Earth Engine提供的遥感影像进行分析了近年森林的变化状况
结论
目前，一些世界自然遗产正在受到人类活动大幅增加所引起的严重危险，近三十年，世界指定保护区缓冲区的森林损失率非常高。与世界自然保护区相比，保护区周围的缓冲区所经受的森林损失和人类压力要高很多，这需要引起注意，因为NWHS的生态完整性取决于与更广泛的景观之间的联系，世界遗产委员会应该考虑将更多资源用于NWHS周围环境的保护。
TCL碎碎念
其实个人觉得这篇SCI没有很大的技术难度，也没有用什么很复杂的分析技术，只是运用了较大时间跨度的数据，将世界自然保护区周围的植被覆盖情况统计总结并给出了一定的结论与总结。那么按照这个思路下去，还可以做的研究有。自然保护区周围水体变化情况的研究；自然保护区周围生物多样性的研究；自然保护区周围土地利用变化的研究。
