...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Current Biology: CB >Modularity and Overcompensatory Growth in Ediacaran Rangeomorphs Demonstrate Early Adaptations for Coping with Environmental Pressures
【24h】

Modularity and Overcompensatory Growth in Ediacaran Rangeomorphs Demonstrate Early Adaptations for Coping with Environmental Pressures

机译：Ediacaran RangeMorphs的模块化和过度补偿的增长展示了应对环境压力的早期适应性

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 first known diverse, complex, macroscopic benthic marine ecosystems (late Ediacaran, ca. 571–541 Ma) were dominated by the Rangeomorpha, an enigmatic group of extinct frondose eukaryotes that are candidate early metazoans []. The group is characterized by a self-similar branching architecture that was most likely optimized for exchange, but nearly every other aspect of their biology is contentious []. We report locally enhanced, aberrant growth (“eccentric branching”) in a stalked, multifoliate rangeomorph—Hylaecullulus fordin. gen., n. sp.—from Charnwood Forest (UK), confirming the presence of true biological modularity within the group. Random branches achieve unusually large proportions and mimic the architecture of their parent branch, rather than that of their neighbors (the norm). Their locations indicate exceptional growth at existing loci, rather than insertion at new sites. Analogous overcompensatory branching in extant modular organisms requires the capacity to orchestrate growth at specific sites and occurs most frequently in response to damage or environmental stress, allowing regeneration toward optimum morphology (e.g., []). Its presence in rangeomorphs indicates a hitherto unappreciated level of control to their growth plan, a previously unrecognized form of morphological plasticity within the group, and an ability to actively respond to external physical stimuli. The trait would have afforded rangeomorphs resilience to fouling and abrasion, partially accounting for their wide environmental tolerance, and may have pre-adapted them to withstand predation, weakening this argument for their extinction. Our findings highlight that multiple, phylogenetically disparate clades first achieved large size through modularity.
机译：第一种已知的多样化，复杂的宏观肉体海洋生态系统（晚埃德加伦，CA.571-541 MA）由Rangeromorpha主导，这是一种候选早期美容的灭绝粉末真核生物的神秘组织。该集团的特点是自相似的分支架构，最有可能优化交换，但几乎其生物学的其他方面是争议的[]。我们报告了局部增强的异常生长（“偏心分支”），在踩踏的多滤体范围内植物植物中进行了报告。 Gen。，ñ。 Sp.-从Charnwood Forest（英国），确认本集团内真正的生物模块化存在。随机分支实现异常大的比例并模仿他们的父分支的架构，而不是邻居（常态）。他们的位置表示现有基因座的特殊增长，而不是在新网站上插入。在远端模块化生物中的类似细胞间分支需要在特定位点进行协调生长并且响应于损伤或环境应激而最常发生，从而使再生往最佳形态（例如，[]）。它在RangeMorphs中的存在表示迄今为止对其增长计划的未被申请的控制水平，在本集团内的先前未被识别的形态塑性形式，以及积极应对外部物理刺激的能力。该特质将为Rangeromorphs恢复能力抵消和磨损，部分核算了他们广泛的环境耐受性，并且可能预先调整它们以抵抗捕捞，削弱这一论点的灭绝。我们的研究结果强调了多个，系统源性地不同的分歧，首先通过模块化实现大的尺寸。

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