Morphological Response of Bolivina Lowmani to Sediment Composition and Organic Matter: Applying Geometric Morphometrics for Potential Bio-Monitoring

IF 0.9 4区 地球科学 Q4 PALEONTOLOGY Journal of Foraminiferal Research Pub Date : 2020-07-01 DOI:10.2113/gsjfr.50.3.249
Margarette Bayrón-Arcelay, Kyara Rodríguez-Camacho, D. Acosta-Mercado
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Abstract

It is well established that sediment composition plays an important role in shaping the community of benthic foraminifera (e.g., species richness). To our knowledge, there is little information about morphometric variations in benthic foraminifera in relation to sediment composition and organic matter content. However, given their sensitivity to these environmental variables, variations in size (width and height of the test) and shape (form of the test) of the foraminifera could provide information about potential disturbances, serving as an index of anthropogenic pressure for coastal ecosystems. In this study, we used geometric morphometrics to compare the average size and shape of a common species, Bolivina lowmani, among islets in La Parguera, Puerto Rico. We hypothesized that the average size and shape of B. lowmani will be different among islets. We further hypothesize that there will be a concomitant morphometric gradient of B. lowmani with sediment particle size and organic matter content. After a random sampling approach, we found that size regressed as a function of mud content and shape variations regressed as a function of organic matter content. Therefore, sediment composition could be a factor affecting foraminiferal growth rates highlighting that the morphometrics of benthic foraminifera could be added to the list of potential indexes that could be used to track current environmental degradation in coastal habitats. Furthermore, our data validate the sensitivity of foraminifera and their usefulness as indicators of environmental hazards.
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对沉积物组成和有机质的形态响应:应用几何形态计量学进行潜在的生物监测
众所周知,沉积物成分在形成底栖有孔虫群落(如物种丰富度)方面发挥着重要作用。据我们所知,关于海底有孔虫的形态计量学变化与沉积物成分和有机质含量的关系,信息很少。然而,考虑到有孔虫对这些环境变量的敏感性,有孔虫的大小(测试的宽度和高度)和形状(测试的形式)的变化可以提供有关潜在干扰的信息,作为沿海生态系统人为压力的指标。在这项研究中,我们使用几何形态计量学来比较波多黎各La Parguera小岛中常见物种Bolivina lowmani的平均大小和形状。我们进一步假设,随着沉积物粒度和有机质含量的增加,B.lowmani的形态计量梯度将随之而来。采用随机抽样方法后,我们发现尺寸随泥浆含量而回归,形状变化随有机质含量而回归。因此,沉积物成分可能是影响有孔虫生长率的一个因素,这突出表明海底有孔虫的形态计量学可以被添加到可用于跟踪沿海栖息地当前环境退化的潜在指数列表中。此外,我们的数据验证了有孔虫的敏感性及其作为环境危害指标的有用性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Journal of Foraminiferal Research
Journal of Foraminiferal Research 地学-古生物学
CiteScore
2.10
自引率
9.10%
发文量
32
审稿时长
>12 weeks
期刊介绍: JFR publishes original papers of international interest dealing with the Foraminifera and allied groups of organisms. Review articles are encouraged.
期刊最新文献
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