Chen, Jing and Gu, Ji-Dong (2017) Faunal burrows alter the diversity, abundance, and structure of AOA, AOB, anammox and n-damo communities in coastal mangrove sediments. Microbial Ecology, 74 (1). pp. 140-156. doi:10.1007/s00248-017-0939-5 ISSN 0095-3628.

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Abstract

In the present work, the diversity, community structures, and abundances of aerobic ammonia-oxidizing archaea (AOA) and bacteria (AOB), anaerobic ammonium-oxidizing (anammox) bacteria, and denitrifying anaerobic methane oxidization (n-damo) bacteria were unraveled in the bioturbated areas of the coastal Mai Po mangrove sediments. Results indicated that the bioturbation by burrowing in mangrove sediments was associated with higher concentration of NH4+ but lower concentrations of both NO2− and NO3−, and increase in diversity and richness of both AOA and AOB, but relatively lower diversity and richness of n-damo bacteria. The phylotypes of anammox bacterial community were significantly increased while their phylogenetic lineages observed in the less bioturbated areas were also maintained. Infauna also showed a great impact on the composition of n-damo bacterial phylotypes and burrowing activity altered the n-damo community structure profoundly in the sampled areas. The communities of n-damo bacteria in the surrounding bulk sediments showed similar structures to marine n-damo communities, but those on the burrow wall and in the ambient surface layer had a freshwater pattern, which was different from previous findings in Mai Po wetland. On the other hand, the abundances of AOA, AOB, and n-damo bacteria were greatly stimulated on burrow walls while the abundance of anammox bacteria remained unchanged. Infaunal burrows and mangrove roots affected the relative abundance of AOA and AOB. The benthic infauna stimulated the abundances of AOA, AOB, anammox, and n-damo bacteria. Furthermore, NH4+ and NO2− were important environmental factors changing the structure of each group. The communities of anammox and n-damo bacteria in bioturbated areas showed a competitive relationship.

Item Type:	Journal Article
Subjects:	Q Science > QE Geology Q Science > QR Microbiology
Divisions:	Faculty of Science, Engineering and Medicine > Science > Life Sciences (2010- )
Library of Congress Subject Headings (LCSH):	Bioturbation, Sediments (Geology) -- Analysis, Mangrove swamps, Archaebacteria, Bacteria
Journal or Publication Title:	Microbial Ecology
Publisher:	Springer
ISSN:	0095-3628
Official Date:	July 2017
Dates:	Date Event July 2017 Published 28 January 2017 Available 18 January 2017 Accepted 22 June 2015 Submitted
Volume:	74
Number:	1
Page Range:	pp. 140-156
DOI:	10.1007/s00248-017-0939-5
Status:	Peer Reviewed
Publication Status:	Published
Access rights to Published version:	Restricted or Subscription Access
Date of first compliant deposit:	3 March 2017
Date of first compliant Open Access:	28 January 2018
Funder:	University of Hong Kong (HKU). PhD Fellowship , Research Grants Council (Hong Kong, China)
Grant number:	Grant No. 701913 (Research Grants Council (Hong Kong, China))

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