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Wetland metagenome

ABSTRACT: Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 F5 metagenome

PROVIDER: PRJNA469250 | ENA |

REPOSITORIES: ENA

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			Action	DRS
	SRR7962856_1.fastq.gz	Fastqsanger.gz
	SRR7962856_2.fastq.gz	Fastqsanger.gz

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Similar Datasets

Differential effects of chronic and acute simulated seawater intrusion on tidal freshwater marsh carbon cycling.

Project description:Tidal freshwater ecosystems experience acute seawater intrusion associated with periodic droughts, but are expected to become chronically salinized as sea level rises. Here we report the results from an experimental manipulation in a tidal freshwater Zizaniopsis miliacea marsh on the Altamaha River, GA where diluted seawater was added to replicate marsh plots on either a press (constant) or pulse (2 months per year) basis. We measured changes in porewater chemistry (SO4 2-, Cl-, organic C, inorganic nitrogen and phosphorus), ecosystem CO2 and CH4 exchange, and microbial extracellular enzyme activity. We found that press (chronic) seawater additions increased porewater chloride and sulfate almost immediately, and ammonium and phosphate after 2-4 months. Chronic increases in salinity also decreased net ecosystem exchange, resulting in reduced CO2 and CH4 emissions from press plots. Our pulse treatment, designed to mimic natural salinity incursion in the Altamaha River (September and October), temporarily increased porewater ammonium concentrations but had few lasting effects on porewater chemistry or ecosystem carbon balance. Our findings suggest that long-term, chronic saltwater intrusion will lead to reduced C fixation and the potential for increased nutrient (N, P) export while acute pulses of saltwater will have temporary effects.

2018-01-01 | S-EPMC6750722 | BioStudies

Effects of 10 yr of nitrogen and phosphorus fertilization on carbon and nutrient cycling in a tidal freshwater marsh.

Project description:Tidal freshwater marshes can protect downstream ecosystems from eutrophication by intercepting excess nutrient loads, but recent studies in salt marshes suggest nutrient loading compromises their structural and functional integrity. Here, we present data on changes in plant biomass, microbial biomass and activity, and soil chemistry from plots in a tidal freshwater marsh on the Altamaha River (GA) fertilized for 10 yr with nitrogen (+N), phosphorus (+P), or nitrogen and phosphorus (+NP). Nitrogen alone doubled aboveground biomass and enhanced microbial activity, specifically rates of potential nitrification, denitrification, and methane production measured in laboratory incubations. Phosphorus alone increased soil P and doubled microbial biomass but did not affect microbial processes. Nitrogen or P alone decreased belowground biomass and soil carbon (C) whereas +NP increased aboveground biomass, microbial biomass and N cycling, and N, P, and C assimilation and burial more than either nutrient alone. Our findings suggest differential nutrient limitation of tidal freshwater macrophytes by N and microbes by P, similar to what has been observed in salt marshes. Macrophytes outcompete microbes for P in response to long-term N and P additions, leading to increased soil C storage through increased inputs of belowground biomass relative to N and P added singly. The susceptibility of tidal freshwater marshes to long-term nutrient enrichment and, hence their ability to mitigate eutrophication will depend on the quantity and relative proportion of N vs. P entering estuaries and tidal wetlands.

2020-01-01 | S-EPMC7377238 | BioStudies

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 CS5 metagenome

| PRJNA469248 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 PU4 metagenome

| PRJNA469255 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 PR6 metagenome

| PRJNA469254 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 PU5 metagenome

| PRJNA469256 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 PR4 metagenome

| PRJNA469252 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 C5 metagenome

| PRJNA469246 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 C6 metagenome

| PRJNA469247 | ENA

wetland metagenome

Project description:Sediment microbial communities from tidal freshwater marsh on Altamaha River, Georgia, United States - 10-16 CS6 metagenome

| PRJNA469249 | ENA

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