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Authors Pivnickova, B; Rejmankova, E; Snyder, JM; Santruckova, H
Author Full Name Pivnickova, Barbora; Rejmankova, Eliska; Snyder, Jenise M.; Santruckova, Hana
Title Heterotrophic microbial activities and nutritional status of microbial communities in tropical marsh sediments of different salinities: the effects of phosphorus addition and plant species
Source PLANT AND SOIL
Language English
Document Type Article
Author Keywords Phosphorus loading; Eleocharis; Typha; Salinity; Microbial biomass; Nitrogen
Keywords Plus TOTAL ORGANIC-CARBON; FATTY-ACIDS; BACTERIAL COMMUNITIES; CLADIUM-JAMAICENSE; TYPHA-DOMINGENSIS; WETLAND SEDIMENTS; EVERGLADES MARSH; NORTHERN BELIZE; CENTRAL-AMERICA; SOIL
Abstract Oligotrophic, phosphorus (P) limited herbaceous wetlands of northern Belize are being impacted by P loading from fertilizer runoff. P enrichment causes a shift in autotroph communities from a microphyte (cyanobacterial mats, CBM) to macrophyte (Eleocharis spp., Typha domingensis) dominated system. To document potential effects of P, salinity, and macrophyte species on the heterotrophic microbial community nutritional status (represented especially by specific phospholipids fatty acids and specific respiration rate), biomass and activities, we took soil samples from established P enrichment plots in replicated marshes of two salinity levels. P addition increased microbial biomass carbon (C), nitrogen (N) and P, as well as soil nutrient transformation rates (nitrogenase activity, N mineralization and immobilization, methanogenesis). The effect of plant species (Eleocharis vs Typha sites) was generally lower than the effect of P addition (CBM vs Eleocharis sites) and was most evident at the low salinity sites, where Eleocharis dominated plots had enhanced nitrogenase activity and P microbial immobilization. Salinity reduced the overall rates of microbial processes; it also weakened the positive effect of both P addition and plant species on microbial activities. Lastly, the amount of N stored in microbial cells, likely in form of osmoprotective compounds, was enhanced by salinity.
Author Address [Pivnickova, Barbora; Santruckova, Hana] Univ S Bohemia, Fac Sci, Ceske Budejovice 37005, Czech Republic; [Rejmankova, Eliska; Snyder, Jenise M.] Univ Calif Davis, Dept Environm Sci & Policy, Davis, CA 95616 USA
Reprint Address Pivnickova, B (corresponding author), Univ S Bohemia, Fac Sci, Branisovska 31, Ceske Budejovice 37005, Czech Republic.
E-mail Address bara.pivnickova@seznam.cz
Funding Agency and Grant Number NSFNational Science Foundation (NSF) [0089211]; MSMMinistry of Education, Youth & Sports - Czech Republic [600 766 5801]; [ME 912]
Funding Text We would like to thank Ireneo Briceno, Russell King and Peter Macek for their assistance in the field, Emily Carlson, Karolina Tahovska, Eva Kastovska, Daniel Vanek and Tomas Picek for laboratory assistance and to the journal editor and anonymous reviewers for their helpful comments and suggestions. This research was supported by these grants: NSF # 0089211 to E. R.; ME 912, and MSM # 600 766 5801 to H. S.
Times Cited 8
Total Times Cited Count (WoS, BCI, and CSCD) 14
Publisher SPRINGER
Publisher City DORDRECHT
Publisher Address VAN GODEWIJCKSTRAAT 30, 3311 GZ DORDRECHT, NETHERLANDS
ISSN 0032-079X
29-Character Source Abbreviation PLANT SOIL
ISO Source Abbreviation Plant Soil
Publication Date NOV
Year Published 2010
Volume 336
Issue 1-2
Beginning Page 49
Ending Page 63
Digital Object Identifier (DOI) 10.1007/s11104-010-0439-6
Page Count 15
Web of Science Category Agronomy; Plant Sciences; Soil Science
Subject Category Agriculture; Plant Sciences
Document Delivery Number 669RJ
Unique Article Identifier WOS:000283367600006
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