期刊
MARINE POLLUTION BULLETIN
卷 155, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.marpolbul.2020.111160
关键词
Biogeography; nosZ-denitrifier community; Mangrove; Environmental factor
资金
- Program of Science and Technology of Shenzhen [JSGG20170824110218769]
- Program of Department of Natural Resources of Guangdong Province in 2020 (Study on Intelligent monitoring and evaluation of Mangrove in Guangdong-HongKong-Macao Greater Bay Area by unmanned aerial vehicle)
- Shenzhen Municipal Development and Reform Commission (Discipline Construction of Watershed Ecological Engineering)
To explore the geographical variations in the nosZ-denitrifier community and the underlying influential factors, surface sediments were collected from six mangroves across China, including Yunxiao (YX), Futian (FT), Fangchenggang (FCG), Zhanjiang (ZJ), Dongzhaigang (DZG), and Dongfang (DF). The nosZ gene abundance in mangrove sediments were 1.60 x 10(5)-1.17 x 10(6) copies g(-1) dry sediment, with a higher density in Avicennia marina forest than the mudflat. Denitrifier community richness and diversity increased with decreasing latitude based on the Chao1 richness and Shannon diversity index, with the highest diversity being observed in the DF mangrove. The denitrifier communities could be classified into three groups including south DF mangrove, middle FCG, ZJ and DZG mangroves, and north YX and FT mangroves based on HCA and PCoA analysis. The nosZ OTUs could be divided into seven distinct clusters with different proportionality characteristics among mangroves. Environmental factors (TN, TOC, and salinity) collectively shape denitrifier communities in mangrove sediments.
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