Abstract
Salt marshes are vegetated terrestrial systems that develop along coastlines in temperate to arctic environments, in areas where surface or groundwater mixes with flooding from coastal tides. These environments perform essential ecosystem services such as storm buffering, carbon-trapping, and the protection of estuarine waters through the removal of land-based nutrients. The sediments in these environments are chemically complex, with gradients of salinity, redox, and pH that give rise to some of the most abundant and diverse microbial communities yet characterized. However, the significant loss of marsh surface area over the past 150 years has raised concerns about the stability of these microbial communities and their ability to deliver ecosystem services in the future. Many reasons have been proposed for the loss in marsh surface area, including anthropogenic pollutants, changes in predator and herbivore ecology, and global sea level rise. This chapter examines the structure of baseline microbial communities and their role in salt marsh biogeochemical cycling—and how anthropogenic land-based pollutants may negatively affect the ecosystem services provided by these microbial communities.
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Coombs, J.M. (2019). Microbial Communities in Salt Marsh Systems and Their Responses to Anthropogenic Pollutants. In: Hurst, C. (eds) Understanding Terrestrial Microbial Communities. Advances in Environmental Microbiology, vol 6. Springer, Cham. https://doi.org/10.1007/978-3-030-10777-2_8
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