Organic Carbon Partitioning under Multiple Stressors in the Ocean
ID：786
Poster Presentation
2027-01-15 17:45 （China Standard Time）
Session： Session 20 - New Data and Technologies Driven Insights into Aquatic Organic Matter Cycling
Abstract
As the largest active carbon reservoir on Earth, the ocean sequesters organic carbon through two major pathways, the biological carbon pump and the microbial carbon pump, which process phytoplankton-fixed organic carbon primarily as particulate organic carbon (POC) and dissolved organic carbon (DOC), respectively. The partitioning of organic carbon between POC and DOC influences the efficiency of the marine carbon sink and its feedback on global climate change. Previous studies have demonstrated that environmental factors including ocean warming, acidification, high light exposure and changes in nutrient supply, can significantly modulate the DOC-POC partitioning. However, the combined effects of multiple environmental drivers, which may interact synergistically or antagonistically, have led to considerable uncertainty and inconsistence observations regarding the response of organic carbon partitioning. Furthermore, most previous studies have focused on individual environmental drivers or specific regional seas, leaving the response patterns and underlying mechanisms of organic carbon partitioning across latitudinal gradients under multiple environmental stressors poorly understood. In this study, we used a series of onboard manipulation experiments across latitudinal nutrient gradients in the Northwest Pacific to evaluate the effects of nutrient addition, ocean acidification, ocean warming, high-light exposure, and their interactive effects on organic carbon partitioning. By quantifying changes in POC and DOC, we aim to determine how multiple environmental stressor regulate organic carbon partitioning across latitudinal zones and help improve predictions of future changes in marine carbon cycle.
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Important Dates
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Jan 30
2026
Session / Event proposals open
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Mar 31
2026
Session / Event proposals close
（Extended to April 7） -
Apr 30
2026
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Apr 30
2026
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Jun 30
2026
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（Extended to July 21） -
Aug 31
2026
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Sep 15
2026
Scientific program released
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Oct 15
2026
Early bird registration closes
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Jan 12–15
2027
XMAS 2027