EMMAH, INRAE, Avignon Université, 84000 Avignon, France.
EMMAH, Avignon Université, INRAE, 84000 Avignon, France.
Water Res. 2022 Jun 1;216:118342. doi: 10.1016/j.watres.2022.118342. Epub 2022 Mar 21.
The burrowing, feeding and foraging activities of terrestrial and benthic organisms induce displacements of soil and sediment materials, leading to a profound mixing of these media. Such particle movements, called "sediment reworking" in aquatic environments and "bioturbation" in soils, have been thoroughly studied and modeled in sediments, where they affect organic matter mineralization and contaminant fluxes. In comparison, studies characterizing the translocation, by soil burrowers, of mineral particles, organic matter and adsorbed contaminants are paradoxically fewer. Nevertheless, models borrowed from aquatic ecology are used to predict the impact of bioturbation on organic matter turnover and contaminant transport in the soil. However, these models are based on hypotheses that have not been tested with adequate observations in soils, and may not necessarily reflect the actual impact of soil burrowers on particle translocation. This paper aims to (i) highlight the possible shortcomings linked to the current use of sediment reworking models for soils, (ii) identify how recent progresses in aquatic ecology could help to circumvent these limitations, and (iii) propose key steps to ensure that soil bioturbation models are built on solid foundations: more accurate models of organic matter turnover, soil evolution and contaminant transport in the soil are at stake.
陆地和底栖生物的挖掘、进食和觅食活动会引起土壤和沉积物物质的位移，导致这些介质的深度混合。这种颗粒运动在水生环境中被称为“沉积物再搬运”，在土壤中被称为“生物搅动”，它们在沉积物中受到了深入研究和建模，因为这些运动影响着有机物的矿化和污染物的通量。相比之下，对土壤挖掘者搬运矿物质颗粒、有机物和吸附污染物的研究却相对较少。然而，水生生态学家借鉴的模型被用于预测生物搅动对土壤中有机物周转和污染物输运的影响。但是，这些模型是基于在土壤中经过充分观察验证的假设，它们不一定能反映出土壤挖掘者对颗粒迁移的实际影响。本文旨在：（i）强调当前在土壤中使用沉积物再搬运模型可能存在的缺陷；（ii）确定水生生态学的最新进展如何有助于克服这些局限性；（iii）提出确保土壤生物搅动模型建立在坚实基础上的关键步骤：更准确的土壤有机物周转、土壤演变和污染物输运模型至关重要。
