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Effects of nutrient loading on sediment bacterial and pathogen communities within seagrass meadows

Liu, Songlin, Jiang, Zhijian, Deng, Yiqin, Wu, Yunchao, Zhang, Jingping, Zhao, Chunyu, Huang, Delian, Huang, Xiaoping and Trevathan-Tackett, Stacey M 2018, Effects of nutrient loading on sediment bacterial and pathogen communities within seagrass meadows, MicrobiologyOpen, vol. 7, no. 5, pp. 1-11, doi: 10.1002/mbo3.600.

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Title Effects of nutrient loading on sediment bacterial and pathogen communities within seagrass meadows
Author(s) Liu, Songlin
Jiang, Zhijian
Deng, Yiqin
Wu, Yunchao
Zhang, Jingping
Zhao, Chunyu
Huang, Delian
Huang, Xiaoping
Trevathan-Tackett, Stacey MORCID iD for Trevathan-Tackett, Stacey M orcid.org/0000-0002-4977-0757
Journal name MicrobiologyOpen
Volume number 7
Issue number 5
Article ID e00600
Start page 1
End page 11
Total pages 11
Publisher Wiley Open Access
Place of publication Chichester, Eng.
Publication date 2018-10
ISSN 2045-8827
2045-8827
Keyword(s) bacteria
denitrification
eutrophication
putative pathogens
seagrass meadows
Summary Eutrophication can play a significant role in seagrass decline and habitat loss. Microorganisms in seagrass sediments are essential to many important ecosystem processes, including nutrient cycling and seagrass ecosystem health. However, current knowledge of the bacterial communities, both beneficial and detrimental, within seagrass meadows in response to nutrient loading is limited. We studied the response of sediment bacterial and pathogen communities to nutrient enrichment on a tropical seagrass meadow in Xincun Bay, South China Sea. The bacterial taxonomic groups across all sites were dominated by the Gammaproteobacteria and Firmicutes. Sites nearest to the nutrient source and with the highest NH4+ and PO43− content had approximately double the relative abundance of putative denitrifiers Vibrionales, Alteromonadales, and Pseudomonadales. Additionally, the relative abundance of potential pathogen groups, especially Vibrio spp. and Pseudoalteromonas spp., was approximately 2‐fold greater at the sites with the highest nutrient loads compared to sites further from the source. These results suggest that proximity to sources of nutrient pollution increases the occurrence of potential bacterial pathogens that could affect fishes, invertebrates and humans. This study shows that nutrient enrichment does elicit shifts in bacterial community diversity and likely their function in local biogeochemical cycling and as a potential source of infectious diseases within seagrass meadows.
Language eng
DOI 10.1002/mbo3.600
HERDC Research category C1 Refereed article in a scholarly journal
ERA Research output type C Journal article
Copyright notice ©2018, The Authors
Free to Read? Yes
Use Rights Creative Commons Attribution licence
Persistent URL http://hdl.handle.net/10536/DRO/DU:30106856

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Every reasonable effort has been made to ensure that permission has been obtained for items included in DRO. If you believe that your rights have been infringed by this repository, please contact drosupport@deakin.edu.au.