Spatial distribution features of microorganisms and assessment of carbon sink capability in mangrove sediments

YANG Huirong; FANG Chang; GAO Junchao; JIAO Fang

doi:10.13471/j.cnki.acta.snus.2022E071

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Spatial distribution features of microorganisms and assessment of carbon sink capability in mangrove sediments

Mangrove fisheries carbon sink column | 更新时间：2023-11-01

- Spatial distribution features of microorganisms and assessment of carbon sink capability in mangrove sediments
- Acta Scientiarum Naturalium Universitatis Sunyatseni Vol. 62, Issue 2, Pages: 28-36(2023)
- 作者机构：
  
  1.华南农业大学海洋学院，广东广州 510642
  2.华南农业大学中山创新中心，广东中山 528400
  3.江门市地质与海洋防灾监测站，广东江门 529000
- 作者简介：
- 基金信息：
- DOI：10.13471/j.cnki.acta.snus.2022E071
  CLC： Q938.1
- Published：25 March 2023，
  
  Published Online：02 March 2023，
  
  Received：28 December 2022，
  
  Accepted：14 February 2023
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杨慧荣,方畅,高均超等.红树林沉积物微生物空间分布特征及碳汇能力评估[J].中山大学学报(自然科学版),2023,62(02):28-36.

YANG Huirong,FANG Chang,GAO Junchao,et al.Spatial distribution features of microorganisms and assessment of carbon sink capability in mangrove sediments[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(02):28-36.
杨慧荣,方畅,高均超等.红树林沉积物微生物空间分布特征及碳汇能力评估[J].中山大学学报(自然科学版),2023,62(02):28-36. DOI： 10.13471/j.cnki.acta.snus.2022E071.

YANG Huirong,FANG Chang,GAO Junchao,et al.Spatial distribution features of microorganisms and assessment of carbon sink capability in mangrove sediments[J].Acta Scientiarum Naturalium Universitatis Sunyatseni,2023,62(02):28-36. DOI： 10.13471/j.cnki.acta.snus.2022E071.

摘要

红树林区沉积物中丰富的微生物群落，在生长环境的特异性选择压力下，演化出不同的空间分布特性和碳汇能力。以位于汕头市的粤东典型红树林区为研究区域，运用16S rRNA高通量测序技术分析了沉积物微生物群落的结构组成和生物多样性特征，并对其潜在碳汇能力进行了探讨。结果表明，红树林区沉积物的优势菌门为Proteobacteria、Chloroflexi和Desulfobacterota，优势菌属来源于

unclassified_Gammaproteobacteria、Anaerolinea

和

Woeseia

；污染程度较低、林分未成熟地区的沉积物物种丰富度较高，但物种均匀度较低，而污染程度中等、林分发育成熟地区的沉积物微生物的物种多样性和均匀度较高；随着深度的增加，沉积物微生物的丰富度、多样性和均匀度等微生物α多样性指标都呈下降趋势，其中多样性指数下降最为显著（

0.05）；污染程度低、林分尚未成熟的红树林区具有最强的微生物碳汇能力；微生物碳汇能力与采样深度之间不存在显著相关性。本研究的结果为红树林沉积物微生物的资源化利用提供了理论依据。

Abstract

The microbial communities in mangrove sediments have evolved spatial distribution features with different characteristic and carbon sink capacity under the environment-specific selection pressure. The composition， diversity and potential carbon sink capacity of the sediment microbial communities were analyzed using 16S rRNA high-throughput sequencing in a typical mangrove area in Shantou city， eastern Guangdong province. The results showed that the dominant phyla in mangrove sediment were Proteobacteria， Chloroflexi and Desulfobacterota， and the dominant microorganisms at the genus level were derived from

unclassified_Gammaproteobacteria

，

Anaerolinea

and

Woeseia.

Sediments with low pollution and immature forest had higher richness and lower evenness， while sediments with moderate levels of pollution and mature forest stands had relatively high biodiversity and evenness. With increasing depth， the microbial α-diversity indexes such as richness， diversity and evenness of sediment microorganisms showed a decreasing trend， among which the diversity index decreased most significantly （

0.05）. The mangrove areas with less pollution and immature forest stands had the optimal microbial carbon sink capacity while there was no significant relationship between microbial carbon sink capacity and sampling depth. This study provide a theoretical basis for the resource utilization of mangrove sediment microorganisms.

关键词

红树林沉积物微生物群落空间分布碳汇

Keywords

mangrove sedimentmicrobial communityspatial distributioncarbon sink

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Related Institution

School of Marine Science， Sun Yat-sen University

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