Sediment trapping is a widely accepted technique in lake studies for analyzing seasonal limnological events and can provide insight into ecological succession as well as the seasonal dynamics of organic and inorganic fluxes. More recently, organic flux measurement from traps has been especially important in estimating whole‐lake C sequestration as a basis for regional and global upscaling of C budgets across lake types. However, in‐trap mineralization or dissolution of components of collected sediment (seston) has not been systematically examined, and thus a reliable correction factor for in‐trap losses of various sedimentary fluxes (especially those involving organic carbon) is still unknown. This experimental study assesses the loss of algal biomass representative of a 6‐month carousel‐type (closed) sediment trap deployment in a deep, eutrophic lake under cold (~ 5°C) and anoxic ambient conditions typical of the hypolimnion in stratifying, temperate lakes. Results show a loss of organic matter (OM) at a consistent rate over 180 d, reducing the fraction of initial OM content by approximately a third after 180 d of deployment (linear regression of OM fraction loss = −0.001864t ). The significance of these findings is demonstrated by application to published trap data; at Rostherne Mere, UK, which implies that annual OM fluxes are underestimated by 18.2% on average (range 13.7–23.2%). This highlights the far‐reaching implications for lake sediment trap methodology and our understanding of seston taphonomy, suggesting a mineralization correction factor for OM should be applied to traps deployed for longer than 1 week. With loss correction factored in, this study supports the reliability of longer‐term (i.e., ~ 6 months) sediment trap deployment.

中文翻译：

---

湖泊诱集研究中的塞内斯长期圈闭矿化作用的实验评估和意义

沉积物捕集是湖泊研究中被广泛接受的用于分析季节性湖泊事件的技术，可以洞悉生态演替以及有机和无机通量的季节性动态。最近，从捕集阱中获得的有机通量测量在估算全湖碳固存量方面尤为重要，这是区域和全球范围内湖泊类型碳预算增加的基础。但是，还没有系统地检查圈闭内矿化作用或收集的沉积物成分（seston）的溶解，因此，尚不清楚各种沉积通量（尤其是涉及有机碳的圈闭）的圈内损失的可靠校正因子。这项实验研究评估了藻类生物量的损失，这些损失代表了在深层，在层状，温带湖泊中，低温（〜5°C）和缺氧环境条件下典型的低层化的富营养化湖泊。结果显示，有机物（OM）的损失在180 d内保持一致的速率，在部署180 d后初始OM含量减少了约三分之一（OM损失的线性回归= -0.001864t）。这些发现的重要性通过应用于已发布的陷阱数据得到了证明。在英国Rostherne Mere，这意味着年均OM通量被低估了平均18.2％（范围13.7–23.2％）。这突显了对湖泊沉积物捕集阱方法学的深远影响，以及我们对塞斯顿法学的理解，表明OM的矿化校正因子应应用于部署超过1周的捕集阱。考虑到损失校正，这项研究支持了较长期（约6个月）沉积物捕集器部署的可靠性。