• 主题
高级搜索  >
历史搜索 清空历史
首页> 美国卫生研究院文献>Proceedings of the National Academy of Sciences of the United States of America >Inaugural Article: Late Pleistocene and Holocene environmental history of the Iguala Valley Central Balsas Watershed of Mexico
【2h】

Inaugural Article: Late Pleistocene and Holocene environmental history of the Iguala Valley Central Balsas Watershed of Mexico

机译：开幕文章：墨西哥中部巴尔萨斯分水岭伊瓜拉河谷晚更新世和全新世环境史

代理获取
本网站仅为用户提供外文OA文献查询和代理获取服务，本网站没有原文。下单后我们将采用程序或人工为您竭诚获取高质量的原文，但由于OA文献来源多样且变更频繁，仍可能出现获取不到、文献不完整或与标题不符等情况，如果获取不到我们将提供退款服务。请知悉。
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The origin of agriculture was a signal development in human affairs and as such has occupied the attention of scholars from the natural and social sciences for well over a century. Historical studies of climate and vegetation are closely associated with crop plant evolution because they can reveal the ecological contexts of plant domestication together with the antiquity and effects of agricultural practices on the environment. In this article, we present paleoecological evidence from three lakes and a swamp located in the Central Balsas watershed of tropical southwestern Mexico that date from 14,000 B.P. to the modern era. [Dates expressed in B.P. years are radiocarbon ages. Calibrated (calendar) ages, expressed as cal B.P., are provided for dates in the text.] Previous molecular studies suggest that maize (Zea mays L.) and other important crops such as squashes (Cucurbita spp.) were domesticated in the region. Our combined pollen, phytolith, charcoal, and sedimentary studies indicate that during the late glacial period (14,000–10,000 B.P.), lake beds were dry, the climate was cooler and drier, and open vegetational communities were more widespread than after the Pleistocene ended. Zea was a continuous part of the vegetation since at least the terminal Pleistocene. During the Holocene, lakes became important foci of human activity, and cultural interference with a species-diverse tropical forest is indicated. Maize and squash were grown at lake edges starting between 10,000 and 5,000 B.P., most likely sometime during the first half of that period. Significant episodes of climatic drying evidenced between 1,800 B.P. and 900 B.P. appear to be coeval with those documented in the Classic Maya region and elsewhere, showing widespread instability in the late Holocene climate.
机译：农业的起源是人类事务的信号发展，因此，一个多世纪以来，自然科学和社会科学领域的学者一直关注着农业。气候和植被的历史研究与农作物的进化密切相关，因为它们可以揭示植物驯化的生态环境，以及古代和农业实践对环境的影响。在本文中，我们提供了来自三个湖泊和位于墨西哥西南部热带南部中央巴尔萨斯分水岭的沼泽的古生态证据，该沼泽可追溯至公元前14,000年。到现代。 [以B.P.年是放射性碳时代。校准的（日历）年龄用cal B.P.表示，用于文本中的日期。]先前的分子研究表明，该地区已驯化了玉米（Zea mays L.）和南瓜等其他重要农作物（南瓜属）。我们的花粉，植物石炭，木炭和沉积物的综合研究表明，在冰川晚期（公元前14,000–10,000 B.P.），湖床干燥，气候凉爽干燥，开放植被群落比更新世结束后更为广泛。至少从更新世末期开始，玉米是植被的连续部分。在全新世期间，湖泊成为人类活动的重要焦点，并表明了对物种多样的热带森林的文化干扰。玉米和南瓜生长在公元前10,000至5,000 B.P.的湖边，最有可能在该时期的前半段某个时间。在公元前1,800年之间，出现了明显的气候干燥事件。和公元前900年似乎与经典玛雅人地区和其他地区记载的那些年代相同，表明在全新世晚期气候中普遍存在不稳定。

著录项

相似文献

  • 外文文献
  • 专利
代理获取

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号