Shan Tao, Yuan An-Long, Huang Zi-Rui, Zhou Jing-Yi, Lu Xin-Xin, Fan Ya-Wen
College of Life Science and Technology, Harbin Normal University, Harbin 150025, China.
Key Laboratory of Biodiversity of Aquatic Organisms, Harbin Normal University, Harbin 150025, China.
Huan Jing Ke Xue. 2023 Mar 8;44(3):1465-1474. doi: 10.13227/j.hjkx.202205168.
With the improvement of public requirements for the health status of aquatic ecosystems, there have been innovative assessment methods developed for aquatic ecosystems. In this study, benthic algae assemblages and water quality variables were analyzed to develop a benthic diatom-based index of biotic integrity (D-IBI) for the assessment of the aquatic environment in the Lalin River. In addition, using redundancy analysis (RDA) based on dominant species and physicochemical indexes, the ecological distribution characteristics of the benthic diatom community were revealed, and the key influencing factors were identified. The results showed that the benthic diatom community structure in the Lalin River basin had obvious spatial differences. The application of the index revealed that the water quality could be described as excellent condition in the upper reaches of the Lalin River, good to common condition in the middle of the sites, and moderate to poor condition in the downstream. The assessment further revealed that the main reason for the degradation of the Lalin River ecosystem was nutrient enrichment through agricultural land use.
随着公众对水生生态系统健康状况要求的提高，已开发出用于水生生态系统的创新评估方法。在本研究中，分析了底栖藻类组合和水质变量，以开发一种基于底栖硅藻的生物完整性指数（D-IBI），用于评估拉林河水生环境。此外，利用基于优势物种和理化指标的冗余分析（RDA），揭示了底栖硅藻群落的生态分布特征，并确定了关键影响因素。结果表明，拉林河流域底栖硅藻群落结构存在明显的空间差异。该指数的应用表明，拉林河上游水质可描述为优良状态，中游站点水质为良好至一般状态，下游水质为中度至较差状态。评估进一步表明拉林河生态系统退化的主要原因是农业土地利用导致的营养物质富集。
