globalchange  > 过去全球变化的重建
DOI: 10.1371/journal.pone.0138230
论文题名:
Changes in Microbial Plankton Assemblages Induced by Mesoscale Oceanographic Features in the Northern Gulf of Mexico
作者: Alicia K. Williams; Allison S. McInnes; Jay R. Rooker; Antonietta Quigg
刊名: PLOS ONE
ISSN: 1932-6203
出版年: 2015
发表日期: 2015-9-16
卷: 10, 期:9
语种: 英语
英文关键词: Plankton ; Salinity ; Flow cytometry ; Surface water ; Cell enumeration techniques ; Sea water ; Diatoms ; Oceans
英文摘要: Mesoscale circulation generated by the Loop Current in the Northern Gulf of Mexico (NGOM) delivers growth-limiting nutrients to the microbial plankton of the euphotic zone. Consequences of physicochemically driven community shifts on higher order consumers and subsequent impacts on the biological carbon pump remain poorly understood. This study evaluates microbial plankton <10 μm abundance and community structure across both cyclonic and anti-cyclonic circulation features in the NGOM using flow cytometry (SYBR Green I and autofluorescence parameters). Non-parametric multivariate hierarchical cluster analyses indicated that significant spatial variability in community structure exists such that stations that clustered together were defined as having a specific ‘microbial signature’ (i.e. statistically homogeneous community structure profiles based on relative abundance of microbial groups). Salinity and a combination of sea surface height anomaly and sea surface temperature were determined by distance based linear modeling to be abiotic predictor variables significantly correlated to changes in microbial signatures. Correlations between increased microbial abundance and availability of nitrogen suggest nitrogen-limitation of microbial plankton in this open ocean area. Regions of combined coastal water entrainment and mesoscale convergence corresponded to increased heterotrophic prokaryote abundance relative to autotrophic plankton. The results provide an initial assessment of how mesoscale circulation potentially influences microbial plankton abundance and community structure in the NGOM.
URL: http://journals.plos.org/plosone/article/file?id=10.1371/journal.pone.0138230&type=printable
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/20819
Appears in Collections:过去全球变化的重建
影响、适应和脆弱性
科学计划与规划
气候变化与战略
全球变化的国际研究计划
气候减缓与适应
气候变化事实与影响

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作者单位: Department of Oceanography, Texas A&M University, College Station, Texas, United States of America;Department of Oceanography, Texas A&M University, College Station, Texas, United States of America;Climate Change Cluster, University of Technology, Sydney, Australia;Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, United States of America;Department of Wildlife and Fisheries, Texas A&M University, College Station, Texas, United States of America;Department of Oceanography, Texas A&M University, College Station, Texas, United States of America;Department of Marine Biology, Texas A&M University at Galveston, Galveston, Texas, United States of America

Recommended Citation:
Alicia K. Williams,Allison S. McInnes,Jay R. Rooker,et al. Changes in Microbial Plankton Assemblages Induced by Mesoscale Oceanographic Features in the Northern Gulf of Mexico[J]. PLOS ONE,2015-01-01,10(9)
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