Apr 3, 2020

A microbial perspective on balancing trade-offs in ecosystem functions in a constructed stormwater wetland

BioRxiv : the Preprint Server for Biology
Regina B BledsoeA. L. Peralta

Abstract

Green stormwater infrastructure, such as constructed wetlands (CWs), is a type of stormwater control measure that can reduce nutrient and pollutant loads in urban stormwater runoff. Nutrient and pollutant removal processes within wetlands are primarily driven by microbial functions that can also result in disservices such as greenhouse gas (GHG) emissions, which can negate climate change mitigation. Specifically, microbial respiration by facultative anaerobes in anoxic conditions is the primary pathway for nitrogen removal. Similar anoxic conditions that support denitrifiers can also support obligate anaerobes that produce methane via methanogenesis. In this study, we examined nitrogen removal potential, GHG production, and microbial community structure within flooded and shallow land areas of a stormwater CW to identify zones for CW design optimization. Our results indicate that permanently flooded zones are sources of methane emissions and have the greatest contribution to climate change. However, denitrification potential rates were similar across both flooded and shallow land zones. This suggests that shallow land areas can provide nitrogen removal services with reduced GHG emissions compared to flooded zones. In the case o...Continue Reading

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Mentioned in this Paper

Study
Clinical Study by Phase
Genome
Genes
Recombination, Genetic
Genetic Pedigree
Site
Genomics
Antimutagenic Effect
Primates

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