珊瑚粘液促进珊瑚礁生态系统中微生物的碳代谢能力

IF 3.8 1区 地球科学 Q1 LIMNOLOGY Limnology and Oceanography Pub Date : 2024-08-30 DOI:10.1002/lno.12673
Xiaoyu Zhang, Keke Cheng, Yuke Qin, Xinyang Li, Zhonghua Cai, Bo Yang, Mui-Choo Jong, Huina Zheng, Baohua Xiao, Jin Zhou
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引用次数: 0

摘要

珊瑚粘液富含有机物,能释放养分和微生物,影响珊瑚礁的元素循环和微生物群落。虽然陆地生态系统中根部渗出物的引诱效应已被充分研究,但粘液对海洋环境,尤其是珊瑚礁的影响仍未得到充分探索。我们假设,珊瑚粘液通过其营养物质和微生物刺激周围的微生物,调节碳代谢,从而促进珊瑚礁的高生产力。最初,研究人员收集了天然样本(Acropora pruinosa 粘液、海水和沉积物),对微生物群落和功能进行元基因组评估。结果表明,粘液、海水和沉积物中的微生物多样性、群落结构、共存模式和独特功能存在明显差异。随后的实验室实验证明了粘液对周围微生物的重大影响。包括 16S rRNA 测序和生态板结果在内的分析表明,粘液能调节微生物的组成和活动。定量基因芯片分析表明,与碳固定(如 3- 羟基丙酸循环)和降解(如果胶和半纤维素水解)有关的功能基因显著增加,增幅分别为 55.81% 和 65.48%。偏最小二乘法路径模型确定粘液养分和微生物群落组成是碳代谢潜力的关键因素。这项研究证实,粘液可作为触发器,重塑珊瑚周围的微生物轮廓,提高碳利用效率,突出了粘液在珊瑚礁生态系统碳代谢和维持高生产力中的重要作用。
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Coral mucus promotes the carbon metabolic potency of microorganisms in the coral reef ecosystem

Coral mucus, teeming with organic matter, releases nutrients and microorganisms, affecting element cycling and microbial communities in coral reefs. While terrestrial ecosystems exhibit well-studied priming effects from root exudates, the influence of mucus in marine environments, particularly in coral reefs, remains underexplored. We hypothesize that coral mucus, through its nutrients and microbes, stimulates the surrounding microorganisms, regulating carbon metabolism and thus contributing to high coral reef productivity. Initially, natural samples (Acropora pruinosa mucus, seawater, and sediment) were collected for metagenomic assessment of microbial communities and functions. Results showed significant differences in microbial diversity, community structures, co-occurrence modes, and unique functions among mucus, seawater, and sediment. Subsequent laboratory experiments demonstrated mucus's substantial influence on surrounding microorganisms. Analyses, including 16S rRNA sequencing and Eco-plate results, revealed that mucus regulates microbial composition and activities. Quantitative gene-chip analysis showed significant increase in the functional genes related to carbon fixation (e.g., the 3-hydroxypropionate cycle) and degradation (e.g., pectin and hemicellulose hydrolysis) by 55.81% and 65.48%, respectively. Partial least squares path modeling identified mucus nutrients and microbial community composition as key contributors to carbon metabolic potential. This research confirms that mucus acts as a trigger, reshaping microbial profiles around corals and enhancing carbon utilization efficiency, highlighting its essential role in carbon metabolism and the maintenance of high productivity in coral reef ecosystems.

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来源期刊
Limnology and Oceanography
Limnology and Oceanography 地学-海洋学
CiteScore
8.80
自引率
6.70%
发文量
254
审稿时长
3 months
期刊介绍: Limnology and Oceanography (L&O; print ISSN 0024-3590, online ISSN 1939-5590) publishes original articles, including scholarly reviews, about all aspects of limnology and oceanography. The journal''s unifying theme is the understanding of aquatic systems. Submissions are judged on the originality of their data, interpretations, and ideas, and on the degree to which they can be generalized beyond the particular aquatic system examined. Laboratory and modeling studies must demonstrate relevance to field environments; typically this means that they are bolstered by substantial "real-world" data. Few purely theoretical or purely empirical papers are accepted for review.
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