Global S&T Development Trend Analysis Platform of Resources and Environment
DOI | 10.1029/2020WR028468 |
Influence of Bioturbation on Hyporheic Exchange in Streams: Conceptual Model and Insights from Laboratory Experiments | |
S. Shrivastava; M. J. Stewardson; M. Arora | |
2021-01-26 | |
发表期刊 | Water Resources Research |
出版年 | 2021 |
英文摘要 | Bioturbation occurs in streambeds by the action of a range of faunal species, but little is known about how it could modify the hyporheic exchange in streams. Previous experimental work investigating the effects of sediment‐biota interaction on exchange across the sediment‐water interface has been largely conducted in small mesocosms or infiltration columns that do not represent the lotic environment adequately. Therefore, the experimental findings from these studies may not be transferable to flowing water environments (e.g., streams). In this work, we first present a conceptual model demonstrating the causal pathways through which the sediment reworking and burrow ventilation processes (together referred to as bioturbation) could potentially modify the hyporheic flow regime. Next, to study the role of activities of faunal organisms in lotic environments and test some of the arguments presented in the model, laboratory experiments are conducted in re‐circulating flumes. The experiments involved investigating the modification of dune‐induced hyporheic flow due to the activities of a model bioturbating organism, Lumbriculus variegatus, following a control (without organisms) and treatment (with organisms) based experimental design. The sediment reworking activities such as surficial deposition of fecal pellets and burrowing by L. variegatus caused significantly higher hyporheic flux, longer mean residence times, and deeper solute penetration in the treatment flumes relative to the control flumes. We advocate that more intensive laboratory experiments and field investigations must be conducted to test the propositions put forward in the conceptual model and advance our understanding of the role of bioturbation process in fluvial ecosystems. |
领域 | 资源环境 |
URL | 查看原文 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://119.78.100.173/C666/handle/2XK7JSWQ/313795 |
专题 | 资源环境科学 |
推荐引用方式 GB/T 7714 | S. Shrivastava,M. J. Stewardson,M. Arora. Influence of Bioturbation on Hyporheic Exchange in Streams: Conceptual Model and Insights from Laboratory Experiments[J]. Water Resources Research,2021. |
APA | S. Shrivastava,M. J. Stewardson,&M. Arora.(2021).Influence of Bioturbation on Hyporheic Exchange in Streams: Conceptual Model and Insights from Laboratory Experiments.Water Resources Research. |
MLA | S. Shrivastava,et al."Influence of Bioturbation on Hyporheic Exchange in Streams: Conceptual Model and Insights from Laboratory Experiments".Water Resources Research (2021). |
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