实验室培养实验中潮间带有孔虫组合对盐度变化的响应

IF 0.9 4区 地球科学 Q4 PALEONTOLOGY
Meng Li, Y. Lei, Tiegang Li, Shuaishuai Dong
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引用次数: 2

摘要

本研究探讨了黄海潮间带有孔虫组合对盐度的响应,通过在实验室微观环境中以6种恒定盐度水平(17、22、27、32、37和42 psu)培养100天,每种重复4次。共获得7471个活体(染色)有孔虫标本并进行分析。有孔虫群落的多样性参数(物种丰富度、Margalef指数、Shannon-Wiener指数和Fisher’s alpha)随着盐度的升高或降低而显著下降,但有孔虫丰度对盐度具有较强的抗性。此外,盐度对不同目有孔虫的影响也不同。随着盐度的增加,milolida目的物种比例显著增加,而Rotaliida目的物种比例显著降低。当盐度敏感物种比例下降时,高耐盐性物种aomoriensis、Cribrononion gnythosuturatum、氨温菌(氨温菌)和半青藻(Quinqueloculina semula)可以填补空缺的生态位。此外,我们的形态测量结果表明,有孔虫试验尺寸与盐度呈显著负相关,当盐度偏离现场值时,有孔虫组合中出现了大量异常标本。研究表明,潮间带有孔虫群落在不同盐度条件下具有较强的适应能力,这主要是由于具有较高的耐盐优势种。此外,盐度变化可以显著改变有孔虫的形态,包括试验尺寸和异常。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Response of Intertidal Foraminiferal Assemblages to Salinity Changes in a Laboratory Culture Experiment
This study explored the response to salinity of intertidal foraminiferal assemblages from the Yellow Sea by culturing them for 100 days at six constant salinity levels (17, 22, 27, 32, 37, and 42 psu) in laboratory microcosms with four replicates each. A total of 7,471 live (stained) foraminiferal specimens were obtained and analyzed. The diversity parameters of foraminiferal assemblages (species richness, Margalef index, Shannon-Wiener index, and Fisher's alpha) declined significantly when the salinity was increased or decreased from the field value, but foraminiferal abundance was highly resistant to salinity. In addition, salinity exerted different effects on foraminifera from different orders. Specifically, the proportion of species from Order Miliolida significantly increased whereas that of species from Order Rotaliida decreased with increasing salinity. High salinity-tolerant species Ammonia aomoriensis, Cribrononion gnythosuturatum, Ammonia tepida, and Quinqueloculina seminula could fill unoccupied ecological niches when the proportion of salinity-sensitive species has declined. Furthermore, our morphometric results showed that foraminiferal test size was significantly negatively correlated with salinity, and numerous abnormal specimens appeared in foraminiferal assemblages when salinity deviated from the field value. Our study revealed that intertidal foraminiferal assemblages had high adaptability at different salinities because of the existence of high salinity-tolerant dominant species. In addition, salinity variation can significantly alter foraminiferal morphology in test size and abnormality.
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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.
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