Assessment of the effectiveness of muck-digesting bacterial pellets

IF 1.1 4区环境科学与生态学 Q4 LIMNOLOGY Lake and Reservoir Management Pub Date : 2022-03-02 DOI:10.1080/10402381.2022.2029635

Emily Kindervater, Maggie Oudsema, Michael C. Hassett, C. Partridge, A. Steinman

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Abstract

Abstract Kindervater E, Oudsema M, Hassett MC, Partridge CG, Steinman AD. 2022. Assessment of the effectiveness of muck-digesting bacterial pellets. Lake Reserv Manage. 38:150–164. We assessed the ability of Mukk Busster bacterial pellets to decrease organic matter (OM) in lake sediments, as well as their impact on overlying water quality and the native bacterial community composition. Sediment and water from 3 lakes in Newaygo County, Michigan, were incubated for 8 weeks in enclosed tubes with 3 treatments: (1) temperature (ambient or ambient plus 3 C); (2) oxygen level (oxic or anoxic); and (3) pellets (present or absent). We found no statistically significant differences in change in OM between pelleted and control treatments. Sediments were also tested with or without pellets in open bins to include more sediment volume and surface area; again, there was no treatment effect of pellets. OM responses differed among lakes: Irrespective of pellet treatment, there was a slight increase in Hess Lake OM, a significant increase in Brooks Lake OM, and a significant decline in Pickerel Lake OM. We have no definitive explanation for the increases in OM, but because they occurred in both types of experimental containers, we believe the increases were not an artifact. The dominant genera in the bacterial community differed only among lakes, not among the pellet vs. control treatments. Our doses exceeded recommendations (due to the small sediment area used), which the manufacturer claims can change the bacterial composition, but our genetic analysis showed no differences in the flora. We conclude that these pellets are not an effective treatment to reduce sediment OM in these lakes. Supplemental data for this article is available online at https://doi.org/10.1080/10402381.2022.2029635.

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淤泥消化细菌颗粒的有效性评估

摘要Kinderwater E，Oudsema M，Hassett MC，Partridge CG，Steinman AD.2022。淤泥消化细菌颗粒的有效性评估。湖泊保护区管理。38:150–164.我们评估了Mukk-Buster细菌颗粒减少湖泊沉积物中有机物（OM）的能力，以及它们对上覆水质和本地细菌群落组成的影响。密歇根州纽艾戈县3个湖泊的沉积物和水被孵化了8个在封闭管中进行3次治疗：（1）温度（环境或环境加3 C）；（2）氧气水平（好氧或缺氧）；和（3）颗粒（存在或不存在）。我们发现，颗粒治疗和对照治疗之间OM的变化没有统计学上的显著差异。沉积物也在开放式垃圾箱中进行了有颗粒或无颗粒的测试，以包括更多的沉积物体积和表面积；再次，颗粒没有处理效果。不同湖泊的OM反应不同：无论颗粒处理如何，赫斯湖OM略有增加，布鲁克斯湖OM显著增加，皮克雷尔湖OM显著下降。我们对OM的增加没有明确的解释，但因为它们发生在两种类型的实验容器中，我们认为这些增加不是人为的。细菌群落中的优势属仅在湖泊之间存在差异，而在颗粒处理与对照处理之间没有差异。我们的剂量超过了建议（由于使用的沉积物面积较小），制造商声称这会改变细菌成分，但我们的基因分析显示菌群没有差异。我们得出的结论是，这些颗粒并不是减少这些湖泊沉积物OM的有效处理方法。本文的补充数据可在线获取，网址为https://doi.org/10.1080/10402381.2022.2029635.

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来源期刊

Lake and Reservoir Management 环境科学-海洋与淡水生物学

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6.70%

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期刊介绍： Lake and Reservoir Management (LRM) publishes original, previously unpublished studies relevant to lake and reservoir management. Papers address the management of lakes and reservoirs, their watersheds and tributaries, along with the limnology and ecology needed for sound management of these systems. Case studies that advance the science of lake management or confirm important management concepts are appropriate as long as there is clearly described management significance. Papers on economic, social, regulatory and policy aspects of lake management are also welcome with appropriate supporting data and management implications. Literature syntheses and papers developing a conceptual foundation of lake and watershed ecology will be considered for publication, but there needs to be clear emphasis on management implications. Modeling papers will be considered where the model is properly verified but it is also highly preferable that management based on the model has been taken and results have been documented. Application of known models to yet another system without a clear advance in resultant management are unlikely to be accepted. Shorter notes that convey important early results of long-term studies or provide data relating to causative agents or management approaches that warrant further study are acceptable even if the story is not yet complete. All submissions are subject to peer review to assure relevance and reliability for management application.