The goal of the current study was to assess the impacts of biosolids additions on the physical/chemical characteristics and microbial communities of surface applied river sediments.
Microbial communities in surface waters are highly responsive to perturbation, shifting with tidal cycles [56], salinity gradients [57], [58], dissolved organic matter concentration [59], and chemical stress [60], [61], [62].
The surface monoculture (SMC) challenge (Figure 3 and Figure S6) demonstrated that, absent a counteracting microbial community, HOOH in surface seawater from the open ocean climbs to concentrations that ecologically relevant cell concentrations of these ecotypes are unable to survive.
The marine Roseobacter clade are potentially major contributors to global CO2 fixation as they make up 10 25% of the total microbial community in some surface ocean ecosystems [1] [4].
The microbial community in the surface mixed layer is genetically diverse [2], and identifying the microbes contributing most significantly to HOOH degradation is a major challenge for future studies.
The various effects that combined anthropogenic stressors have on the complex microbial community in the surface mucous layer of corals have not been well explored.
This change in the surface microbial community may occur quickly at thresholds that are not yet understood and may persist long after thermal stress ends [13].
We used shotgun metagenomics of the microbial community associated with the surface of mussels (Mytilus californianus) on Tatoosh Island in Washington state to test whether there is a nitrogen-based microbial assemblage associated with mussels.
These clear geochemical boundaries are reflected in the compositions of the active surface microbial community, with consistent community compositions of active sulfate reducers and methane-cycling microorganisms in the center and edge of the mat, but a large drop in their RNA expression levels immediately outside the mat.
However, the characterization of the microbial community living at the surface of macroalgae is still limited and the molecular studies of these communities are rare [ 15- 17].
