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段元帅, 谢军, 刘璐, 霍斌, 李大鹏. 基于稳定同位素技术的辽宁浑太河流域水生食物网研究[J]. 水生生物学报, 2024, 48(1): 109-119. DOI: 10.7541/2023.2022.0474
引用本文: 段元帅, 谢军, 刘璐, 霍斌, 李大鹏. 基于稳定同位素技术的辽宁浑太河流域水生食物网研究[J]. 水生生物学报, 2024, 48(1): 109-119. DOI: 10.7541/2023.2022.0474
DUAN Yuan-Shuai, XIE Jun, LIU Lu, HUO Bin, LI Da-Peng. AQUATIC FOOD WEB OF THE HUN-TAI RIVER BASIN IN LIAONING BASED ON STABLE ISOTOPE ANALYSIS[J]. ACTA HYDROBIOLOGICA SINICA, 2024, 48(1): 109-119. DOI: 10.7541/2023.2022.0474
Citation: DUAN Yuan-Shuai, XIE Jun, LIU Lu, HUO Bin, LI Da-Peng. AQUATIC FOOD WEB OF THE HUN-TAI RIVER BASIN IN LIAONING BASED ON STABLE ISOTOPE ANALYSIS[J]. ACTA HYDROBIOLOGICA SINICA, 2024, 48(1): 109-119. DOI: 10.7541/2023.2022.0474

基于稳定同位素技术的辽宁浑太河流域水生食物网研究

AQUATIC FOOD WEB OF THE HUN-TAI RIVER BASIN IN LIAONING BASED ON STABLE ISOTOPE ANALYSIS

  • 摘要: 为探究辽宁省浑太河流域水生生物营养结构特征及其变化, 分别于2020年秋季(10月)和2021年春季(5月)对该流域开展渔业资源调查, 依据主要消费者及饵料生物样品的碳、氮稳定同位素值(δ13C和δ15N), 利用SIBER和MixSIAR模型分析渔获物群落营养结构的时空差异, 并初步构建该流域的食物网。结果表明, 主要渔获物的δ13C和δ15N值分别为–37.18‰— –19.28‰和7.98‰—16.51‰, 且季节性差异不显著(P>0.05), 但δ13C值空间差异极显著(P<0.01)。浑太河流域渔获物的营养级为1.71—4.39, 同种鱼类营养级具有极显著的时空差异(P<0.01)。与春季相比, 鱼类在秋季摄食的食物资源更丰富、所占的生态位更宽, 同时太子河的各项群落营养结构指标均优于浑河。基础食源分析结果表明水生植物与陆生植物分别为浑太河两个季度的主要碳源, 陆生植物和POM分别为浑河和太子河中鱼类的主要碳源。研究填补了对浑太河流域水生生物食物网及群落营养结构研究的空缺, 为该流域后续的保护、修复及进一步开发提供参考依据。

     

    Abstract: In order to investigate the trophic structure characteristics and spatiotemporal variations of aquatic communities in the Hun-Tai River, an important branch of the Liaohe River, the fishery resources surveys were conducted in autumn (October) 2020 and spring (May) 2021. Based on stable isotope analysis, the δ13C and δ15N values of dominant consumers and basal food sources in the river were determined. Then the spatiotemporal variations of trophic structures and the contributions of the basal carbon sources to the aquatic food web were analyzed by SIBER and MixSIAR package. In our study, a total of 23 species of catches, belonging to 3 orders, 6 families, and 20 genera were collected. All the δ13C and δ15N values of the main catches ranged widely from –37.18‰ to –19.28‰, 7.98‰ to 16.51‰, respectively. There were no significant seasonal differences in δ13C and δ15N values (P>0.05). However, the δ13C values variations of spatiality were significant (P<0.01), and the carnivorous δ15N values were higher than omnivorous (P<0.05). The trophic level of catches, ranging from 1.71 to 4.39 in the Hun-Tai River, had extremely significant temporal and spatial differences (P<0.01). The comparison of the ecosystem trophic structure revealed that the food resources and ecological niche occupied by fish in autumn were higher and broader than that in spring, and all trophic structure indicators (NR/CR/TA/CD/NND/SDNND) of the Taizi River higher than those of the Hun River might be brought out by the higher degree of exploitation in the Hun River. In addition, the basal food sources analysis results supposed that aquatic plants and terrestrial plants were major carbon sources in autumn and spring, respectively. Meanwhile the terrestrial plants and POM were major carbon sources in the Hun River and Taizi River, respectively. This study of enriching the contents about food web in the Hun-Tai River provided references for the subsequent protection, restoration and further development, and accumulated basic data for the reconstruction of the river ecosystem in Northeast China.

     

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