Depth-related change of sulfate-reducing bacteria community in mangrove sediments: The influence of heavy metal contamination

被引：43
作者：
Wu, Sijie [1 ]
Li, Ruili [1 ]
Xie, Shuguang [2 ]
Shi, Cong [1 ]
机构：
[1] Peking Univ, Sch Environm & Energy, Shenzhen Grad Sch, Shenzhen 518055, Guangdong, Peoples R China
[2] Peking Univ, State Key Joint Lab Environm Simulat & Pollut Con, Coll Environm Sci & Engn, Beijing 100871, Peoples R China
来源：
MARINE POLLUTION BULLETIN | 2019年 / 140卷
关键词：
Heavy metal; Mangrove; Sulfate-reducing bacteria; Sediment; AMMONIA-OXIDIZING MICROORGANISMS; SALT-MARSH; MICROBIAL COMMUNITY; YANGTZE ESTUARY; ECOLOGICAL RISK; DIVERSITY; ABUNDANCE; SHENZHEN; WETLAND; BIOAVAILABILITY;
D O I：
10.1016/j.marpolbul.2019.01.042
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
This study provides new insight towards the effects of heavy metal contamination on sulfate-reducing bacteria (SRB) in mangrove ecosystem. We investigated SRB communities in mangrove sediments (0-30 cm depth) from Futian, Xixiang and Shajing mangrove wetlands in Shenzhen, China, with different heavy metal contamination levels. The results showed that SRB community abundance (1.71 x 10(7)-3.04 x 10(8) dsrB gene copies g(-1) wet weight sediment) was depth-related and significantly correlated with Cd and Ni concentrations. The a-diversity indices of SRB community (Chao1 = 21.25-84.50, Shannon = 2.31-2.96) were significantly correlated with Cd level in mangrove sediments. Desulfobacteraceae, Desulfobulbaceae and Syntrophobacteraceae acted as major SRB groups in mangrove sediments, and Syntrophobacteraceae was most sensitive to metal contamination. UniFrace clustering analysis revealed that SRB community structure was influenced by the heavy metal concentrations. Moreover, redundancy analysis indicated that Cd and total phosphorus were the major environmental factors affecting the SRB structure in mangrove sediments.
引用
收藏
页码：443 / 450
页数：8
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