...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Vegetation History and Archaeobotany >First records and potential palaeoecological significance of Dianella (Xanthorrhoeaceae), an extinct representative of the native flora of Rapa Nui (Easter Island). (Special Issue: It's all in the detail: a tribute to Hilary Birks and her contributions to palaeoecology.)
【24h】

First records and potential palaeoecological significance of Dianella (Xanthorrhoeaceae), an extinct representative of the native flora of Rapa Nui (Easter Island). (Special Issue: It's all in the detail: a tribute to Hilary Birks and her contributions to palaeoecology.)

机译：迪安内拉（Xanthorrhoeaceae）的原始记录及其潜在的古生态学意义。迪安内拉是拉帕努伊（复活节岛）本地植物的绝种代表。 （特刊：详细内容：对希拉里·伯克斯及其对古生态学的贡献。）

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Easter Island, a remote island in the Pacific Ocean, is currently primarily covered by grasslands, but palaeoecological studies have shown the former presence of different vegetation. Much of its original biota has been removed during the last two millennia, most likely by human activities, and little is known about the native flora. Macrofossil and pollen analyses of a sediment core from the Raraku crater lake have revealed the occurrence of a plant that is currently extinct from the island: Dianella cf. intermedia/adenanthera (Xanthorrhoeaceae), which grew and disappeared at the Raraku site long before human arrival. The occurrence of Dianella within the Raraku sedimentary sequence (between 9.4 and 5.4 cal. kyr b.p.) could have been linked to the existence of favorable palaeoenvironmental conditions (peatland rather than the present-day lacustrine environment) during the early to mid Holocene. This finding contributes new knowledge about indigenous plant diversity on Easter Island and reinforces the usefulness of further macrofossil and pollen analyses to identify native species on Easter Island and elsewhere.
机译：复活节岛是太平洋上的一个偏远岛屿，目前主要被草原覆盖，但是古生态学研究表明以前存在着不同的植被。在过去的两千年中，大部分原始生物群已被清除，这很可能是由于人类活动造成的，而对原生植物的了解却很少。对来自Raraku火山口湖的沉积物岩心进行的大化石和花粉分析表明，该岛目前已灭绝了一种植物：Dianellacf。 intermedia / adenanthera（Xanthorrhoeaceae），在人类到达之前很久就在Raraku遗址生长和消失。在全新世早期至中期，Raraku沉积层序（介于9.4和5.4 cal。kyr b.p.之间）中的Dianella的发生可能与有利的古环境条件（草原而不是当今的湖相环境）的存在有关。这一发现为有关复活节岛上本地植物多样性的新知识做出了贡献，并加强了进一步的大化石和花粉分析以鉴定复活节岛及其他地方的本地物种的有用性。

著录项

相似文献

  • 外文文献
获取原文

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