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Macroinvertebrate interactions stimulate decomposition in WWTP effluent-impacted aquatic ecosystems
Aquatic Sciences ( IF 2.0 ) Pub Date : 2021-08-09 , DOI: 10.1007/s00027-021-00821-8
Tom V. van der Meer 1 , Gea H. van der Lee 1 , Ralf C. M. Verdonschot 1 , Piet F. M. Verdonschot 1, 2
Affiliation  

Aquatic ecosystems worldwide are impacted by an influx of nutrients and sludge particles from wastewater treatment plant (WWTP) effluents, leading to a degradation of benthic habitats and a loss of associated macroinvertebrate taxa. Hence, in habitats impacted by WWTPs, only a few tolerant macroinvertebrate taxa remain. These tolerant detritivore macroinvertebrate taxa play an important role in the degradation of organic matter, and biotic interactions between these taxa may either enhance or reduce the rate of sludge degradation. Therefore, the aim of the present study was to examine if the interaction between asellids and tubificids, both highly abundant in systems impacted by WWTP effluent, enhances the degradation of sludge. To this end, growth and reproduction of both taxa, sludge degradation and nutrient concentrations in the overlying water were measured in a 28-day laboratory experiment, subjecting WWTP sludge to 4 treatments: a control without macroinvertebrates, a tubificid, an asellid, and an asellid + tubificid treatment. Sludge degradation, phosphate concentration in the overlying water and asellid reproduction were enhanced when asellids and tubificids were jointly present, whereas tubificid growth and reproduction were hampered in comparison to the tubificid treatment. Hence, our results suggest that the biotic interactions between these tolerant detritivores stimulate sludge degradation, and thus possibly mitigating the negative impacts of WWTP-derived sludge particles on the benthic environment.



中文翻译:

大型无脊椎动物相互作用刺激受污水处理厂出水影响的水生生态系统的分解

世界范围内的水生生态系统受到来自污水处理厂 (WWTP) 流出物的养分和污泥颗粒流入的影响,导致底栖栖息地退化和相关大型无脊椎动物类群的丧失。因此,在受污水处理厂影响的栖息地中,只剩下少数具有耐受性的大型无脊椎动物类群。这些耐腐烂的大型无脊椎动物类群在有机物质的降解中发挥着重要作用,这些类群之间的生物相互作用可能会增强或降低污泥降解的速度。因此,本研究的目的是检查在受污水处理厂流出物影响的系统中高度丰富的 asellids 和tubificids 之间的相互作用是否会增强污泥的降解。为此,两个类群的生长和繁殖,在为期 28 天的实验室实验中测量了上覆水中的污泥降解和养分浓度,对 WWTP 污泥进行 4 种处理:没有大型无脊椎动物的对照、tubificid、asellid 和 asellid + tubificid 处理。当 asellids 和 tubificids 共同存在时,污泥降解、上覆水中的磷酸盐浓度和 asellid 繁殖得到增强,而与 tubificid 处理相比,tubificid 的生长和繁殖受到阻碍。因此,我们的结果表明,这些耐受性碎屑动物之间的生物相互作用会刺激污泥降解,从而可能减轻污水处理厂衍生的污泥颗粒对底栖环境的负面影响。没有大型无脊椎动物、tubificid、asellid 和 asellid + tubificid 处理的对照。当 asellids 和 tubificids 共同存在时,污泥降解、上覆水中的磷酸盐浓度和 asellid 繁殖增强,而与 tubificid 处理相比,tubificid 生长和繁殖受到阻碍。因此,我们的结果表明,这些耐受性碎屑动物之间的生物相互作用会刺激污泥降解,从而可能减轻污水处理厂衍生的污泥颗粒对底栖环境的负面影响。没有大型无脊椎动物、tubificid、asellid 和 asellid + tubificid 处理的对照。当 asellids 和 tubificids 共同存在时,污泥降解、上覆水中的磷酸盐浓度和 asellid 繁殖得到增强,而与 tubificid 处理相比,tubificid 的生长和繁殖受到阻碍。因此,我们的结果表明,这些耐受性碎屑动物之间的生物相互作用会刺激污泥降解,从而可能减轻污水处理厂衍生的污泥颗粒对底栖环境的负面影响。而与tubificid处理相比,tubificid的生长和繁殖受到阻碍。因此,我们的结果表明,这些耐受性碎屑动物之间的生物相互作用会刺激污泥降解,从而可能减轻污水处理厂衍生的污泥颗粒对底栖环境的负面影响。而与tubificid处理相比,tubificid的生长和繁殖受到阻碍。因此,我们的结果表明,这些耐受性碎屑动物之间的生物相互作用会刺激污泥降解,从而可能减轻污水处理厂衍生的污泥颗粒对底栖环境的负面影响。

更新日期:2021-08-10
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