• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Facies >Ancient and recent sponge assemblages from the Tyrrhenian coralligenous over millennia (Mediterranean Sea)
【24h】

Ancient and recent sponge assemblages from the Tyrrhenian coralligenous over millennia (Mediterranean Sea)

机译：古代和最近的海绵组合来自千年千年（地中海）的Tyrrhenian Corligenous

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

The demosponge siliceous spicules, entrapped in the Mediterranean coralligenous bioherms, are a good tool for reconstructing the sponge ancient communities across time, also allowing a comparison with the current biodiversity. The aim of this paper has been the description of the ancient sponge assemblages of the coralligenous bioherms grown up in the Tavolara-Capo Coda Cavallo Marine Protected Area (northeastern Sardinia, Tyrrhenian Sea) between 5800 and 3700 YBP and its comparison with the living sponge community. On the base of radiocarbon age determinations, it was possible to estimate that these bioherms cover a span of time ranging from the Holocene Climatic Optimum until the Bronze Age Crisis. Their growth rates, 0.21-0.24mmyear(-1), were of the same order of estimations conducted around the Mediterranean. The Tavolara ancient sponge diversity was compared with those found in ancient accretions from Ligurian Sea and Ionian Sea. Our results supported the already-described general trend, supporting the hypothesis that the genus richness in the coralligenous bioherms was driven by climatic vicissitudes. Nevertheless, our data strongly indicated that the sponge diversity is also related to the conditions of the coralligenous structures: in the accretions characterized by an active growth of coralline algae the number of sponge genera is similar to those recorded in the ancient assemblages while in coralligenous where the accretion is stopped the number of sponge genera strongly decreases probably due to the competition with frondose macroalgae.
机译：在地中海Corligene的生物中捕获的尾声硅质分子是在跨时重建海绵古社区的良好工具，也允许与当前的生物多样性进行比较。本文的目的一直是在塔瓦拉 - 卡波鳕鱼Cavallo海洋保护区（东北撒丁岛，Tyrrhenian海洋）的古代海绵组合的描述，在5800和3700 ybp之间，与生活海绵社区的比较。在无线碳的基础上确定，可以估计这些生物训练涵盖从全茂气候最佳施加到青铜时期危机的时间。它们的增长率为0.21-0.24mmyear（-1），围绕地中海进行了相同的估算顺序。塔瓦拉古代海绵多样性与利古里亚海和爱奥尼亚海的古代吸引力中发现。我们的结果支持已经描述的一般趋势，支持珊瑚生物学中丰富性的假设是由气候变化驱动的。尽管如此，我们的数据强烈表明，海绵分集也与珊瑚色结构的条件有关：在Coralline藻类的活跃生长的作用中，海绵属的数量类似于古代集会中记录的那些在古代集中由于与Frondose Macroalgae的竞争，所吸收的海绵属的数量可能强烈减少。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
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