Zhang Yuanyuan, Liu Kaifang, Lv Jun, Peng Xinliang, Tang Yongtao, Zhao Liangjie, Cheng Yongxu, Liu Qigen
Henan Academy of Fishery Sciences, Zhengzhou 450044, China.
College of Fisheries, Xinyang Agriculture and Forestry University, Xinyang 464000, China.
Biology (Basel). 2024 Sep 21;13(9):739. doi: 10.3390/biology13090739.
To explore the impact of sedimentary nitrogen and phosphorus on occurrence, we conducted a microecosystem experiment simulating different nitrogen and phosphorus content as well as nitrogen-to-phosphorus ratios in the sediment. Subsequently, to further explore the specific mechanism of influence that epiphytic algae have on , we designed various microsystem culture experiments. These results revealed that an N/P ratio of 40:1 was relatively unfavorable for growth. Additionally, there was an extremely significant negative correlation between the benthic cyanobacteria coverage on the sediment surface and the wet weight of ( < 0.01), indicating that benthic cyanobacteria could inhibit the growth of . Total nitrogen levels in the water column showed a significant positive correlation with phytoplankton biomass ( < 0.05), while benthic cyanobacteria coverage exhibited an extremely significant positive correlation with phytoplankton biomass through phosphorus absorption and nitrogen release ( < 0.01). Metabolite analysis of benthic cyanobacteria identified annotations for 313 metabolites; among them cis,cis-muconic acid (32.48‱), erucamide (9.52‱), phosphoric acid (6.97‱), fenpropidin (6.53‱), and propionic acid (5.16‱) accounted for proportions exceeding 5‱. However, none of these metabolites have been recognized as allelochemicals or toxins at present. This study provides novel insights into controlling occurrence by considering sediment nutrients, including nitrogen and phosphorus, along with allelochemicals.
为探究沉积氮和磷对[具体研究对象]发生的影响，我们进行了一项微生态系统实验，模拟沉积物中不同的氮磷含量以及氮磷比。随后，为进一步探究附生藻类对[具体研究对象]产生影响的具体机制，我们设计了各种微系统培养实验。这些结果表明，氮磷比为40:1对[具体研究对象]的生长相对不利。此外，沉积物表面底栖蓝藻的覆盖率与[具体研究对象]的湿重之间存在极显著的负相关关系（P<0.01），这表明底栖蓝藻会抑制[具体研究对象]的生长。水柱中的总氮水平与浮游植物生物量呈显著正相关（P<0.05），而底栖蓝藻覆盖率通过吸收磷和释放氮与浮游植物生物量呈现极显著的正相关关系（P<0.01）。对底栖蓝藻的代谢产物分析鉴定出了313种代谢产物的注释；其中顺式，顺式-粘康酸（32.48‰）、芥酸酰胺（9.52‰）、磷酸（6.97‰）、拌种咯（6.53‰）和丙酸（5.16‰）的占比超过5‰。然而，目前这些代谢产物均未被认定为化感物质或毒素。本研究通过考虑沉积物养分（包括氮和磷）以及化感物质，为控制[具体研究对象]的发生提供了新的见解。
