Effects of Interspecific Competition on Habitat Shifts of Sardinops melanostictus (Temminck et Schlegel, 1846) and Scomber japonicus (Houttuyn, 1782) in the Northwest Pacific

文献类型： 外文期刊

第一作者： Liu, Siyuan

作者： Liu, Siyuan;Zhu, Hanji;Wang, Jianhua;Zhang, Famou;Zhang, Shengmao;Zhang, Heng;Liu, Siyuan;Zhu, Hanji;Wang, Jianhua;Zhang, Famou;Zhang, Shengmao;Zhang, Heng;Zhu, Hanji;Wang, Jianhua;Zhang, Famou;Zhang, Shengmao;Zhang, Heng

作者机构：

关键词： Sardinops melanostictus; Scomber japonicus; the northwest Pacific; interspecific relationship; ecological modeling

期刊名称：BIOLOGY-BASEL （ 影响因子：3.5； 五年影响因子：4.0 ）

ISSN：

年卷期： 2025 年 14 卷 8 期

页码：

收录情况： SCI

摘要： As economically important sympatric species in the Northwest Pacific, the Japanese sardine (Sardinops melanostictus) and Chub mackerel (Scomber japonicus) exhibit significant biological interactions. Understanding the impact of interspecies competition on their habitat dynamics can provide crucial insights for the sustainable development and management of these interconnected species resources. This study utilizes fisheries data of S. melanostictus and S. japonicus from the Northwest Pacific, collected from June to November between 2017 and 2020. We integrated various environmental parameters, including temperature at different depths (0, 50, 100, 150, and 200 m), eddy kinetic energy (EKE), sea surface height (SSH), chlorophyll-a concentration (Chl-a), and the oceanic Ni & ntilde;o index (ONI), to construct interspecific competition species distribution model (icSDM) for both species. We validated these models by overlaying the predicted habitats with fisheries data from 2021 and performing cross-validation to assess the models' reliability. Furthermore, we conducted correlation analyses of the habitats of these two species to evaluate the impact of interspecies relationships on their habitat dynamics. The results indicate that, compared to single-species habitat models, the interspecific competition species distribution model (icSDM) for these two species exhibit a significantly higher explanatory power, with R2 values increasing by up to 0.29; interspecific competition significantly influences the habitat dynamics of S. melanostictus and S. japonicus, strengthening the correlation between their habitat changes. This relationship exhibits a positive correlation at specific stages, with the highest correlations observed in June, July, and October, at 0.81, 0.80, and 0.88, respectively; interspecific competition also demonstrates stage-specific differences in its impact on the habitat dynamics of S. melanostictus and S. japonicus, with the most pronounced differences occurring in August and November. Compared to S. melanostictus, interspecific competition is more beneficial for the expansion of the optimal habitat (HIS >= 0.6) for S. japonicus and, to some extent, inhibits the habitat expansion of S. melanostictus. The variation in migratory routes and predatory interactions (with larger individuals of S. japonicus preying on smaller individuals of S. melanostictus) likely constitutes the primary factors contributing to these observed differences.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序