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筒形罐系统是新石器时代北中国地区重要的文化系统。新石器时代中期,筒形罐系统一度占据着太行山东麓的广袤区域,使得筒形罐系统的领地从东北地区拓展至冀南豫北地区,并且形成了具有明显过渡类型色彩的磁山文化。此后,随着东方釜鼎系统和西方仰韶系统交替占据黄河流域的主流地位,迫使筒形罐系统的南部前沿从冀南豫北地区向北退缩至燕山—西辽河一带,筒形罐系统此后的空间拓展方向也转向了东北腹地。在此背景下,燕山南北成为筒形罐系统与中原文化频繁接触、融合的新地带,先后产生了赵宝沟文化和红山文化等强势文化支系。可见,黄河流域的文化格局不仅改变了筒形罐系统的空间拓展方向,而且直接加剧了筒形罐系统内部各支系间的分化。 相似文献
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Nicolena vonHedemann 《The Canadian geographer》2023,67(1):106-123
Payments for ecosystem services (PES) are a conservation initiative that offer payments to people who own or manage lands that provide desired ecosystem services. Utilizing mixed methods, I examine how PES in the form of government-issued forestry incentives interact with land tenure to affect carbon storage in Guatemala's Western Highlands. Land tenure is a larger determining factor for carbon storage than payments, as communal forests managed by Indigenous Maya K'iche' communities have significantly higher carbon stocks than private landholdings in these same communities. No statistically significant differences were found in carbon stocks between incentivized and non-incentivized plots, and participants enrolled only a fraction of their land, likely prioritizing enrollment of degraded plots. These results indicate the importance of using both social and physical science methods to understand the physical outcomes and social context of forest management. I also reflect on why carbon storage is often prioritized, drawing on a critical physical geography framework to analyze carbon accounting methods. Measuring carbon storage gives us the tools to describe the success of communal forest management, yet I also caution relying on the quantification of ecosystem services as a method for landscape valuation and suggest avoiding prioritizing carbon storage and sequestration. 相似文献
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魏晋南北朝时期瓷容器肩腹部的装饰性纹饰带多为几何纹、植物纹及贴饰的铺首、佛像、骑马武士、仙人瑞兽等内容;堆塑罐上纹饰主要包括模拟现实生活类、虚构的祥禽瑞兽类和宗教类三种;青瓷莲花尊的出现与佛教有关,其器物上主要纹样如莲瓣、忍冬、菩提、宝相花等都直接源于佛教艺术. 相似文献
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赵慧群 《文物保护与考古科学》2020,32(3):38-48
作为加固剂和封护剂,丙烯酸树脂B72(简称B72)是国内外应用极其广泛的文物保护修复材料,但作为黏接剂在陶瓷修复粘接、补全、涂层饰色流程中的应用比例及范围几乎未见相关研究实例。文章梳理了B72材料性能和配制方式,通过不同比例B72丙酮溶液固化及作业时间和应用状态实验,提出其作为黏接剂在陶瓷文物粘接、补全、涂层饰色修复流程中的应用比例标准、适用范围和配方比例。研究结果可为文物保护者提供B72简便高效的应用甄选方案。 相似文献