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<p>Recent studies have documented rapid environmental changes impacting biological communities, such as shifts in phytoplankton composition and size distribution, with significant implications for the nutritional quality of the marine food web. Phytoplankton-derived macromolecules, including carbohydrates (CHO), proteins (PRT), and lipids (LIP), are crucial components of marine ecosystems; however, considerable knowledge gaps remain regarding their spatiotemporal variability and ecological consequences. This study investigates seasonal and regional variations in the macromolecular composition and calorie content of particulate organic matter (POM) across the Korean Peninsula's seas, aiming to identify primary environmental factors driving these variations. Our findings highlight significant variations in POM macromolecular compositions, with CHO and LIP generally dominating over PRT across most regions and seasons, influenced by environmental factors such as temperature, nutrient concentrations, and salinity. Food material (FM), defined as the total sum of CHO, PRT, and LIP, varied significantly among regions, with the Yellow Sea exhibiting notably higher FM, reflecting elevated nutrient concentrations and productivity compared to other regions. Despite broad ranges, both FM and calorie content were, on average, were approximately 40% lower compared to values reported in a previous study. Principal component analysis and multiple linear regression analysis identified similar environmental factors influencing both FM and calorie content, highlighting the importance of regional environmental conditions. This study enhances our understanding of phytoplankton biochemical dynamics in the Korean seas and emphasizes the need for future research on size-specific FM and calorie content to better predict ecosystem responses to ongoing environmental change.</p>

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Environmental drivers of food material and calorie content variability of particulate organic matter in four distinct Korean Peninsula Seas

  • 期刊论文

  • 发表日期：

    2025年10月12日

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  • Yeji Son,
  • Hyo Keun Jang,
  • Kwanwoo Kim,
  • Myung Joon Kim,
  • Sanghoon Park,
  • Yejin Kim,
  • Jaesoon Kim,
  • Yoon Ji Lee,
  • Huitae Joo,
  • Seok-Hyun Youn,
  • Sang Heon Lee

摘要

Recent studies have documented rapid environmental changes impacting biological communities, such as shifts in phytoplankton composition and size distribution, with significant implications for the nutritional quality of the marine food web. Phytoplankton-derived macromolecules, including carbohydrates (CHO), proteins (PRT), and lipids (LIP), are crucial components of marine ecosystems; however, considerable knowledge gaps remain regarding their spatiotemporal variability and ecological consequences. This study investigates seasonal and regional variations in the macromolecular composition and calorie content of particulate organic matter (POM) across the Korean Peninsula's seas, aiming to identify primary environmental factors driving these variations. Our findings highlight significant variations in POM macromolecular compositions, with CHO and LIP generally dominating over PRT across most regions and seasons, influenced by environmental factors such as temperature, nutrient concentrations, and salinity. Food material (FM), defined as the total sum of CHO, PRT, and LIP, varied significantly among regions, with the Yellow Sea exhibiting notably higher FM, reflecting elevated nutrient concentrations and productivity compared to other regions. Despite broad ranges, both FM and calorie content were, on average, were approximately 40% lower compared to values reported in a previous study. Principal component analysis and multiple linear regression analysis identified similar environmental factors influencing both FM and calorie content, highlighting the importance of regional environmental conditions. This study enhances our understanding of phytoplankton biochemical dynamics in the Korean seas and emphasizes the need for future research on size-specific FM and calorie content to better predict ecosystem responses to ongoing environmental change.