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Authors Rietl, AJ; Overlander, ME; Nyman, AJ; Jackson, CR
Author Full Name Rietl, Anthony J.; Overlander, Megan E.; Nyman, Andrew J.; Jackson, Colin R.
Title Microbial Community Composition and Extracellular Enzyme Activities Associated with Juncus roemerianus and Spartina alterniflora Vegetated Sediments in Louisiana Saltmarshes
Source MICROBIAL ECOLOGY
Language English
Document Type Article
Author Keywords Microbial diversity; Extracellular enzyme activity; Wetland microbial communities; Saltmarshes
Keywords Plus SULFATE-REDUCING BACTERIA; PLANT ZONATION; DIVERSITY; GRADIENT; SALINITY; ROOTS; RARE; ASSEMBLAGES; RHIZOSPHERE; POPULATIONS
Abstract Saltmarshes are typically dominated by perennial grasses with large underground rhizome systems that can change local sediment conditions and be important in shaping the sediment microbial community. Factors such as salinity that control plant zonation in saltmarshes are also likely to influence the microbial community, but little is known as to whether microbial communities share distribution patterns with plants in these systems. To determine the extent to which microbial assemblages are influenced by saltmarsh plant communities, as well as to examine patterns in microbial community structure at local and regional scales, we sampled sediments at three saltmarshes in Louisiana, USA. All three systems exhibit a patchy distribution of Juncus roemerianus stands within a Spartina alterniflora marsh. Sediment samples were collected from the interior of several J. roemerianus stands as well as from the S. alterniflora matrix. Samples were assayed for extracellular enzyme activity and DNA extracted to determine microbial community composition. Denaturing gradient gel electrophoresis of rRNA gene fragments was used to determine regional patterns in bacterial, archaeal, and fungal assemblages, while Illumina sequencing was used to examine local, vegetation-driven, patterns in community structure at one site. Both enzyme activity and microbial community structure were primarily influenced by regional site. Within individual saltmarshes, bacterial and archaeal communities differed between J. roemerianus and S. alterniflora vegetated sediments, while fungal communities did not. These results highlight the importance of the plant community in shaping the sediment microbial community in saltmarshes but also demonstrate that regional scale factors are at least as important.
Author Address [Rietl, Anthony J.; Nyman, Andrew J.] Louisiana State Univ, Sch Renewable Nat Resources, Renewable Nat Resources Dept, Baton Rouge, LA 70803 USA; [Overlander, Megan E.; Jackson, Colin R.] Univ Mississippi, Dept Biol, Shoemaker Hall, Oxford, MS 38677 USA
Reprint Address Rietl, AJ (reprint author), Louisiana State Univ, Sch Renewable Nat Resources, Renewable Nat Resources Dept, Baton Rouge, LA 70803 USA.
E-mail Address ARietl1@lsu.edu
Funding Agency and Grant Number National Institute of Food and Agriculture, U.S. Department of Agriculture, McIntire Stennis project [LAB94095]
Funding Text This material is based upon work that is supported by the National Institute of Food and Agriculture, U.S. Department of Agriculture, McIntire Stennis project, under LAB94095. We would also like to thank Logan Boudreaux for help in the field and Bram Stone for help in the laboratory.
Times Cited 17
Total Times Cited Count (WoS, BCI, and CSCD) 18
Publisher SPRINGER
Publisher City NEW YORK
Publisher Address 233 SPRING ST, NEW YORK, NY 10013 USA
ISSN 0095-3628
29-Character Source Abbreviation MICROB ECOL
ISO Source Abbreviation Microb. Ecol.
Publication Date FEB
Year Published 2016
Volume 71
Issue 2
Beginning Page 290
Ending Page 303
Digital Object Identifier (DOI) 10.1007/s00248-015-0651-2
Page Count 14
Web of Science Category Ecology; Marine & Freshwater Biology; Microbiology
Subject Category Environmental Sciences & Ecology; Marine & Freshwater Biology; Microbiology
Document Delivery Number DC2QM
Unique Article Identifier WOS:000369061400004
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