当前位置: X-MOL 学术Aquat. Toxicol. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Wastewater bioremediation by mangrove ecosystems impacts crab ecophysiology: In-situ caging experiment.
Aquatic Toxicology ( IF 4.1 ) Pub Date : 2019-11-20 , DOI: 10.1016/j.aquatox.2019.105358
Dimitri Theuerkauff 1 , Georgina A Rivera-Ingraham 2 , Sophia Lambert 3 , Yann Mercky 1 , Mathilde Lejeune 1 , Jehan-Hervé Lignot 2 , Elliott Sucré 1
Affiliation  

Mangroves are tidal wetlands that are often under strong anthropogenic pressures, despite the numerous ecosystem services they provide. Pollution from urban runoffs is one such threats, yet some mangroves are used as a bioremediation tool for wastewater (WW) treatment. This practice can impact mangrove crabs, which are key engineer species of the ecosystem. Using an experimental area with controlled WW releases, this study aimed to determine from an ecological and ecotoxicological perspective, the effects of WW on the red mangrove crab Neosarmatium africanum. Burrow density and salinity levels (used as a proxy of WW dispersion) were recorded, and a 3-week caging experiment was performed. Hemolymph osmolality, gill Na+/K+-ATPase (NKA) activity and gill redox balance were assessed in anterior and posterior gills of N. africanum. Burrow density decreased according to salinity decreases around the discharged area. Crabs from the impacted area had a lower osmoregulatory capacity despite gill NKA activity remaining undisturbed. The decrease of the superoxide dismutase activity indicates changes in redox metabolism. However, both catalase activity and oxidative damage remained unchanged in both areas but were higher in posterior gills. These results indicate that WW release may induce osmoregulatory and redox imbalances, potentially explaining the decrease in crab density. Based on these results we conclude that WW release should be carefully monitored as crabs are key players involved in the bioremediation process.

中文翻译:

红树林生态系统对废水的生物修复影响了螃蟹的生态生理:原位笼养实验。

红树林是潮汐湿地,尽管它们提供了众多的生态系统服务,但它们往往承受着强烈的人为压力。城市径流造成的污染就是这样的威胁之一,但是有些红树林被用作废水(WW)处理的生物修复工具。这种做法可能会影响到红树林蟹,这是生态系统的主要工程物种。本研究使用具有控制的WW释放的实验区域,旨在从生态和生态毒理学的角度确定WW对红树林蟹非洲新骨蟹的影响。记录洞穴密度和盐度水平(用作WW分散的代表),并进行了3周的笼养实验。在非洲猪笼草的前g和后g中评估了血淋巴渗透压、, Na + / K + -ATPase(NKA)活性和g氧化还原平衡。出土区域周围的盐度降低,洞穴密度降低。来自受影响地区的螃蟹的渗透调节能力较低,尽管刺KA的NKA活性保持不变。超氧化物歧化酶活性的降低表明氧化还原代谢的变化。然而,过氧化氢酶活性和氧化损伤在两个区域均保持不变,但在后g中更高。这些结果表明,WW释放可能引起渗透调节和氧化还原失衡,可能解释了螃蟹密度的降低。根据这些结果,我们得出结论,应谨慎监测WW的释放,因为螃蟹是生物修复过程中的关键参与者。来自受影响地区的螃蟹的渗透调节能力较低,尽管刺KA的NKA活性保持不变。超氧化物歧化酶活性的降低表明氧化还原代谢的变化。然而,过氧化氢酶活性和氧化损伤在两个区域均保持不变,但在后g中更高。这些结果表明,WW释放可能引起渗透调节和氧化还原失衡,可能解释了螃蟹密度的降低。根据这些结果,我们得出结论,应谨慎监测WW的释放,因为螃蟹是生物修复过程中的关键参与者。来自受影响地区的螃蟹的渗透调节能力较低,尽管刺KA的NKA活性保持不变。超氧化物歧化酶活性的降低表明氧化还原代谢的变化。然而,过氧化氢酶活性和氧化损伤在两个区域均保持不变,但在后g中更高。这些结果表明,WW释放可能引起渗透调节和氧化还原失衡,可能解释了螃蟹密度的降低。根据这些结果,我们得出结论,应谨慎监测WW的释放,因为螃蟹是生物修复过程中的关键参与者。这些结果表明,WW释放可能引起渗透调节和氧化还原失衡,可能解释了螃蟹密度的降低。根据这些结果,我们得出结论,应谨慎监测WW的释放,因为螃蟹是生物修复过程中的关键参与者。这些结果表明,WW释放可能引起渗透调节和氧化还原失衡,可能解释了螃蟹密度的降低。根据这些结果,我们得出结论,应谨慎监测WW的释放,因为螃蟹是生物修复过程中的关键参与者。
更新日期:2019-11-20
down
wechat
bug