PMID- 26979838 OWN - NLM STAT- MEDLINE DCOM- 20170810 LR - 20181113 IS - 1432-184X (Electronic) IS - 0095-3628 (Linking) VI - 72 IP - 1 DP - 2016 Jul TI - Effects of Hypoxia on the Phylogenetic Composition and Species Distribution of Protists in a Subtropical Harbor. PG - 96-105 LID - 10.1007/s00248-016-0751-7 [doi] AB - Tolo Harbor, a subtropical semi-enclosed coastal water body, is surrounded by an expanding urban community, which contributes to large concentrations of nutrient runoff, leading to algal blooms and localized hypoxic episodes. Present knowledge of protist distributions in subtropical waters during hypoxic conditions is very limited. In this study, therefore, we combined parallel 454 pyrosequencing technology and denaturing gradient gel electrophoresis (DGGE) fingerprint analyses to reveal the protist community shifts before, during, and after a 2-week hypoxic episode during the summer of 2011. Hierarchical clustering for DGGE demonstrated similar grouping of hypoxic samples separately from oxic samples. Dissolved oxygen (DO) concentration and dissolved inorganic nitrogen:phosphate (DIN:PO4) concentrations significantly affected OTU distribution in 454 sequenced samples, and a shift toward a ciliate and marine alveolate clade II (MALV II) species composition occurred as waters shifted from oxic to hypoxic. These results suggest that protist community shifts toward heterotrophic and parasitic tendencies as well as decreased diversity and richness in response to hypoxic outbreaks. FAU - Rocke, Emma AU - Rocke E AD - Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. FAU - Jing, Hongmei AU - Jing H AD - Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. AD - Sanya Institute of Deep-Sea Science and Engineering, Chinese Academy of Sciences, Sanya, 572000, China. FAU - Xia, Xiaomin AU - Xia X AD - Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. FAU - Liu, Hongbin AU - Liu H AD - Division of Life Science, Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong. liuhb@ust.hk. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20160315 PL - United States TA - Microb Ecol JT - Microbial ecology JID - 7500663 RN - 0 (Phosphates) RN - N762921K75 (Nitrogen) RN - S88TT14065 (Oxygen) SB - IM MH - *Biodiversity MH - Biofilms MH - Ciliophora/*classification/isolation & purification MH - Cluster Analysis MH - Denaturing Gradient Gel Electrophoresis MH - Eukaryota/*classification/isolation & purification MH - Hong Kong MH - Hypoxia/*metabolism MH - Nitrogen/analysis MH - Oxygen/analysis MH - Phosphates/analysis MH - *Phylogeny MH - Seawater/chemistry/microbiology MH - Sequence Analysis, DNA MH - Species Specificity OTO - NOTNLM OT - DGGE OT - Hypoxia OT - Protists OT - Pyrosequencing EDAT- 2016/03/17 06:00 MHDA- 2017/08/11 06:00 CRDT- 2016/03/17 06:00 PHST- 2015/03/06 00:00 [received] PHST- 2016/03/02 00:00 [accepted] PHST- 2016/03/17 06:00 [entrez] PHST- 2016/03/17 06:00 [pubmed] PHST- 2017/08/11 06:00 [medline] AID - 10.1007/s00248-016-0751-7 [pii] AID - 10.1007/s00248-016-0751-7 [doi] PST - ppublish SO - Microb Ecol. 2016 Jul;72(1):96-105. doi: 10.1007/s00248-016-0751-7. Epub 2016 Mar 15.