Strength May Lie in Numbers: Intertidal Foraminifera Non-Negligible Contribution to Surface Sediment Reworking

• 作者: Laurent Seuront Vincent M. P. Bouchet
• 来源期刊: 海洋科学期刊(英文)
• 学科: 数学
• 关键词: Benthic Foraminifera BIOTURBATION Surface Sediment Reworking Rate Intertidal Mudflats
• 年，卷（期）: 2020,（3）
• 页码范围: 131-140
• 页数: 10页
• 分类号: O17

摘要

The contribution of benthic foraminifera to sediment bioturbation has widely been overlooked despite their huge abundance in intertidal soft sediments. In this preliminary study, we specifically chose to focus on two key species of benthic foraminifera in temperate intertidal mudflats, <i><span style="font-size:12px;font-family:Verdana;">Quinqueloculina seminula</span></i><span style="font-size:12px;font-family:Verdana;"> and </span><i><span style="font-size:12px;font-family:Verdana;">Ammonia</span></i> <i><span style="font-size:12px;font-family:Verdana;">tepida</span></i><span style="font-size:12px;font-family:Verdana;">, and first experimentally investigated their individual movements at the sediment surface. We subsequently derived from these observations the individual-level surface sediment reworking rates, and used the actual abundance of these species to extrapolate these rates at the population level. Individual surface sediment reworking rates </span><i><span style="font-size:12px;font-family:Verdana;">SSRR</span>_{<span style="font-size:12px;font-family:Verdana;">i</span>}</i><span style="font-size:12px;font-family:Verdana;"> ranged between 0.13 and 0.32 cm²<span style="white-space:nowrap;">·</span></span><span style="font-size:12px;">^{<span style="font-family:Verdana;"></span>}</span><span style="font-size:12px;font-family:Verdana;">ind</span><span style="font-family:Verdana;font-size:8.33333px;">^-1<span style="white-space:nowrap;">·</span></span><span style="font-size:12px;font-family:Verdana;">day^-1</span> <span style="font-size:12px;font-family:Verdana;">for</span><span style="font-size:10pt;font-family:;" "=""> <i><span style="font-size:12px;font-family:Verdana;">Q. seminula</span></i><span style="font-size:12px;font-family:Verdana;">, and between 0.12 and 0.28 cm²<span style="white-space:nowrap;">·</span></span><span style="font-size:12px;font-family:Verdana;">ind^-1<span style="white-space:nowrap;">·</span></span><span st