College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang, 471000, China.
College of Agricultural Equipment Engineering, Henan University of Science and Technology, Luoyang, 471000, China.
Environ Res. 2024 Aug 15;255:119157. doi: 10.1016/j.envres.2024.119157. Epub 2024 May 17.
Land use types have a significant impact on river ecosystems. The Yiluo River is the largest tributary below Xiaolangdi Reservoir in the middle reaches of the Yellow River, and is one of the important water conservation areas in the Yellow River Basin. Studying the ecological status of the Yiluo River under varied land use types in this basin is crucial for both ecological protection and the high-quality development of the Yellow River Basin. This study investigated the impacts of land use types on the macroinvertebrate community and functional structure in the Yiluo River Basin and introduced the concept of the land use health index (LUI). During the survey period, a total of 11,894 macroinvertebrates were collected, and 143 species were identified, belonging to 4 phyla, 7 orders, 22 families, and 75 families. The results showed that LUI had the most significant impact on macroinvertebrate community structure, with substrate type, dry plant weight, total phosphorus, turbidity, and attached algae biomass also playing significant roles in affecting macroinvertebrate communities. The species richness, the Shannon-Wiener index, and the Margalef richness index exhibited a nonlinear positive correlation with LUI of the sampling site, increasing as LUI enhancing and eventually reaching a plateau. Functional richness showed a linear and positive correlation with LUI, increasing with its enhancement, while functional evenness and functional divergence exhibited a nonlinear correlation with LUI. Functional evenness initially increased and then decreased with the enhancement of LUI, while functional divergence decreased with LUI enhancement. This study can provide a scientific reference for river ecological management under various land use scenarios.The Yiluo River is the largest tributary below Xiaolangdi Reservoir in the middle reaches of the Yellow River, and is one of the important water conservation areas in the Yellow River Basin. Studying the ecological status of the Yiluo River under varied land use types in this basin is crucial for both ecological protection and the high-quality development of the Yellow River Basin. This study investigated the impacts of land use types on the macroinvertebrate community and functional structure in the Yiluo River Basin and introduced the concept of the land use health index (LUI). During the survey period, a total of 11,894 macroinvertebrates were collected, and 143 species were identified, belonging to 4 phyla, 7 orders, 22 families, and 75 families. The results showed that LUI had the most significant impact on macroinvertebrate community structure, with substrate type, dry plant weight, total phosphorus, turbidity, and attached algae biomass also playing significant roles in affecting macroinvertebrate communities. The species richness, the Shannon-Wiener index, and the Margalef richness index exhibited a nonlinear positive correlation with LUI of the sampling site, increasing as LUI enhancing and eventually reaching a plateau. Functional richness showed a linear and positive correlation with LUI, increasing with its enhancement, while functional evenness and functional divergence exhibited a nonlinear correlation with LUI. Functional evenness initially increased and then decreased with the enhancement of LUI, while functional divergence decreased with LUI enhancement. This study can provide a scientific reference for river ecological management under various land use scenarios.
土地利用类型对河流生态系统有重大影响。伊洛河是黄河中游小浪底水库以下的最大支流，也是黄河流域重要的水源涵养区之一。研究该流域不同土地利用类型下的伊洛河生态状况，对生态保护和黄河流域高质量发展都具有重要意义。本研究调查了土地利用类型对伊洛河流域大型底栖无脊椎动物群落和功能结构的影响，并引入了土地利用健康指数（LUI）的概念。在调查期间，共采集了 11894 只大型底栖无脊椎动物，鉴定出 143 种，隶属于 4 门、7 纲、22 科和 75 科。结果表明，LUI 对大型底栖无脊椎动物群落结构的影响最大，基质类型、干植物重量、总磷、浊度和附生藻类生物量对大型底栖无脊椎动物群落也有显著影响。物种丰富度、香农-威纳指数和玛格丽夫丰富度指数与采样点的 LUI 呈非线性正相关，随着 LUI 的增强而增加，最终达到一个平台。功能丰富度与 LUI 呈线性正相关，随着 LUI 的增强而增加，而功能均匀度和功能离散度与 LUI 呈非线性相关。功能均匀度随着 LUI 的增强先增加后减少，而功能离散度随着 LUI 的增强而减少。本研究可为不同土地利用情景下的河流生态管理提供科学参考。
