Presentation Details
Release, degradation, and transformation of dissolved organic carbon in Gracilaria macrophylla under the influence of ocean acidification and enriched nutrients
ID：142
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Updated Time：2024-10-09 17:34:37 Hits：814
Poster Presentation
Start Time：2025-01-16 17:20（Asia/Shanghai）
Duration：15min
Session：S31 Session 31-Blue Carbon: From Science, Restoration and Trading »
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Abstract
Gracilaria lemaneiformis (Gracilaria) is a large economic seaweed that can release some of its photosynthetic products into the water in the form of dissolved organic carbon (DOC). This DOC can be transformed into recalcitrant dissolved organic carbon (RDOC) through microbially-mediated carbon pumps and photo-transformation, making it an important component of marine algal carbon sinks. Ocean acidification and eutrophication are two major global environmental issues, yet their impact on the release of DOC by large seaweeds is poorly understood, and research of the fate of algal-derived DOC is relatively scarce. In this study, we aimed to compare the release of DOC by G.lemaneiformis at multi-growth states under different pH and nutrients conditions, while analyzing the optical parameters of the released organic matter, such as chromophoric dissolved organic matter (CDOM) and fluorescent dissolved organic matter (FDOM). The study also investigates the photodegradation and microbial degradation of the released organic matter and characterizes it through Fourier Transform Ion Cyclotron Resonance Mass Spectrometry (FT-ICR) to track the fate of DOC. This research will contribute to a deeper understanding of the direct relationships between environmental factors and algal-derived dissolved organic carbon, providing important scientific basis for evaluating biological carbon pumps and marine carbon sinks.
Keywords
Gracilaria DOC CDOM Photo-transformation Microbial degradation
Speaker
Pengcheng Xia
Master College of Ocean and Earth Sciences, Xiamen UniversitySubmission Author
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Important Date
-
Conference Date
Jan 13
2025
toJan 17
2025
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Sep 27 2024
Draft paper submission deadline
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Feb 17 2025
Registration deadline
Sponsored By
State Key Laboratory of Marine Environmental Science, Xiamen University
Organized By
State Key Laboratory of Marine Environmental Science, Xiamen University
Department of Earth Sciences, National Natural Science Foundation of China
Department of Earth Sciences, National Natural Science Foundation of China
Contact Information
- Kejing GU
- xm******@xmu.edu.cn
- +86*********
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