阿拉伯湾西部浅海和泻湖环境中底栖有孔虫集合体的形态畸变

Pub Date : 2024-07-01 DOI:10.61551/gsjfr.54.3.290
S. Prayudi, Bassam Tawabini, Asmaa Korin, Michael A. Kaminski
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引用次数: 0

摘要

本研究考察了阿拉伯湾西部六个地点的大型和小型底栖有孔虫集合体,记录了它们在不同盐度梯度下的多样性、丰度和形态畸变。未染色和染色样本均用于量化每个地点的物种多样性、畸形百分比和数量。这些样本显示存在 109 个物种,约四分之一的标本在取样期间是活的。我们观察到不同形态的畸形,其严重程度各不相同,在 40 至 68.5 PSU 的盐度梯度范围内,畸形的总体比例不断增加(平均大于 40%)。对海洋沉积物的环境分析表明,痕量金属或有机污染物等人为胁迫因素未达到危险水平。因此,底栖有孔虫的形态畸变很可能是由盐度引起的(由于盐度梯度或季节变化),因为畸变主要出现在成体标本上。
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Morphological deformities in benthic foraminiferal assemblages from shallow marine and lagoonal environments of the western Arabian Gulf
This study examines larger and smaller benthic foraminiferal assemblages at six localities from western Arabian Gulf, documenting their diversity, abundance, and morphological deformities across a salinity gradient. Both unstained and stained samples were used to quantify species diversity, percent of deformities, and bulk quantity at each site. These samples revealed that 109 species were present and approximately one-quarter of specimens were alive during the sampling period. We observed different morphological deformities with various degrees of severity and an increasing overall percentage of deformities across a salinity gradient from 40 to 68.5 PSU (averaging >40%). Environmental analysis of marine sediment revealed no dangerous levels of anthropogenic stressors, such as trace metals or organic pollutants. Therefore, morphological deformities in the benthic foraminifera are likely salinity-induced (owing to a salinity gradient or seasonal change), as deformities are primarily observed in the adult specimens.
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