Study on the effect of modified clay on algae-derived organic nitrogen mineralization and its mechanisms in diatom Skeletonema costatum

IF 2.8 2区生物学 Q1 MARINE & FRESHWATER BIOLOGY

Frontiers in Marine Science Pub Date : 2025-04-04 DOI:10.3389/fmars.2025.1558899

Xin Feng, Wentao Wang, Yongbao Chu, Jianan Zhu, Lianbao Chi, Jing Chen, Xiuxian Song, Zhiming Yu

{"title":"Study on the effect of modified clay on algae-derived organic nitrogen mineralization and its mechanisms in diatom Skeletonema costatum","authors":"Xin Feng, Wentao Wang, Yongbao Chu, Jianan Zhu, Lianbao Chi, Jing Chen, Xiuxian Song, Zhiming Yu","doi":"10.3389/fmars.2025.1558899","DOIUrl":null,"url":null,"abstract":"Algae-derived organic nitrogen (AON) is mineralized by microorganisms to bioavailable inorganic nitrogen form, potentially sustaining the harmful algal blooms (HABs) for extended durations. The modified clay (MC) is an effective approach for mitigating HABs; however, its effects on the AON mineralization and the underlying mechanism remain unclear. In this study, the effects of MC on the mineralization of AON by a typical HAB species Skeletonema costatum were analyzed using the isotope dilution method, and the underlying mechanism were preliminarily discussed. The results revealed that the addition of MC could reduce the mineralization rates of AON and the regeneration amount of inorganic nitrogen by 71% and 60%, respectively, compared to the control group. The total fluorescence intensity was approximately 46% lower than that of the control group. In addition, the bacterial proliferation was suppressed by 66% and the community evolved from uniformity to diversification. It is hypothesized that the physical encapsulation of AON, chemical bonding of molecules and the variations of the microbial community under the utilization of MC were key mechanisms influencing the mineralization process. This study offers valuable insights into the environmental impacts following the HABs management and provides a scientific basis for investigating the controlling mechanisms of marine organic matter mineralization and burial.","PeriodicalId":12479,"journal":{"name":"Frontiers in Marine Science","volume":"24 1","pages":""},"PeriodicalIF":2.8000,"publicationDate":"2025-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Frontiers in Marine Science","FirstCategoryId":"99","ListUrlMain":"https://doi.org/10.3389/fmars.2025.1558899","RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MARINE & FRESHWATER BIOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Algae-derived organic nitrogen (AON) is mineralized by microorganisms to bioavailable inorganic nitrogen form, potentially sustaining the harmful algal blooms (HABs) for extended durations. The modified clay (MC) is an effective approach for mitigating HABs; however, its effects on the AON mineralization and the underlying mechanism remain unclear. In this study, the effects of MC on the mineralization of AON by a typical HAB species Skeletonema costatum were analyzed using the isotope dilution method, and the underlying mechanism were preliminarily discussed. The results revealed that the addition of MC could reduce the mineralization rates of AON and the regeneration amount of inorganic nitrogen by 71% and 60%, respectively, compared to the control group. The total fluorescence intensity was approximately 46% lower than that of the control group. In addition, the bacterial proliferation was suppressed by 66% and the community evolved from uniformity to diversification. It is hypothesized that the physical encapsulation of AON, chemical bonding of molecules and the variations of the microbial community under the utilization of MC were key mechanisms influencing the mineralization process. This study offers valuable insights into the environmental impacts following the HABs management and provides a scientific basis for investigating the controlling mechanisms of marine organic matter mineralization and burial.

查看原文本刊更多论文

改性粘土对硅藻中藻源有机氮矿化的影响及其机理研究

藻类衍生的有机氮（AON）被微生物矿化为生物可利用的无机氮形式，可能维持有害藻华（HABs）的持续时间。改性粘土（MC）是缓解赤潮的有效途径；然而，其对AON矿化的影响及其机制尚不清楚。本研究采用同位素稀释法分析了MC对典型赤潮藻骨藻AON矿化的影响，并初步探讨了其作用机制。结果表明，与对照组相比，添加MC可使AON矿化率和无机氮再生量分别降低71%和60%。总荧光强度比对照组低约46%。细菌增殖被抑制66%，群落由单一向多样化进化。推测在MC的利用下，AON的物理包封、分子的化学键和微生物群落的变化是影响矿化过程的关键机制。该研究为研究赤潮管理后的环境影响提供了有价值的见解，并为探讨海洋有机质矿化和埋藏的控制机制提供了科学依据。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Frontiers in Marine Science Agricultural and Biological Sciences-Aquatic Science

CiteScore

5.10

自引率

16.20%

发文量

2443

审稿时长

14 weeks

期刊介绍： Frontiers in Marine Science publishes rigorously peer-reviewed research that advances our understanding of all aspects of the environment, biology, ecosystem functioning and human interactions with the oceans. Field Chief Editor Carlos M. Duarte at King Abdullah University of Science and Technology Thuwal is supported by an outstanding Editorial Board of international researchers. This multidisciplinary open-access journal is at the forefront of disseminating and communicating scientific knowledge and impactful discoveries to researchers, academics, policy makers and the public worldwide. With the human population predicted to reach 9 billion people by 2050, it is clear that traditional land resources will not suffice to meet the demand for food or energy, required to support high-quality livelihoods. As a result, the oceans are emerging as a source of untapped assets, with new innovative industries, such as aquaculture, marine biotechnology, marine energy and deep-sea mining growing rapidly under a new era characterized by rapid growth of a blue, ocean-based economy. The sustainability of the blue economy is closely dependent on our knowledge about how to mitigate the impacts of the multiple pressures on the ocean ecosystem associated with the increased scale and diversification of industry operations in the ocean and global human pressures on the environment. Therefore, Frontiers in Marine Science particularly welcomes the communication of research outcomes addressing ocean-based solutions for the emerging challenges, including improved forecasting and observational capacities, understanding biodiversity and ecosystem problems, locally and globally, effective management strategies to maintain ocean health, and an improved capacity to sustainably derive resources from the oceans.