conditions lead to monomictic lake turnover

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Front Microbiol 3:276īiddanda B, Opsahl S, Benner R (1994) Plankton respiration and carbon flux through bacterioplankton on the Louisiana shelf. White AE, Watkins-Brandt KS, Engle MA, Burkhardt B, Paytan A (2012) Characterization of the rate and temperature sensitivities of bacterial remineralization of dissolved organic phosphorus compounds by natural populations. Limnol Oceanogr 48(3):1049–1057ĭyhrman ST, Ammerman JW, Van Mooy BAS (2007) Microbes and the marine phosphorus cycle. Limnol Oceanogr 46:309–320ījörkman KM, Karl DM (2003) Bioavailability of dissolved organic phosphorus in the euphotic zone at Station ALOHA, North Pacific Subtropical Gyre. Kolowith LC, Ingall ED, Benner R (2001) Composition and cycling of marine organic phosphorus. Overall, bacterial groups including Proteobacteria (Alpha and Gamma) and Bacteroidetes seem to be key participants in DOP utilization responses. A theoretical estimation of water column P monoesters was used to calculate the potential P fraction that can be remineralized on an annual basis. As estimated by the system’s P mass balance, P inputs and outputs were similar in magnitude (difference was <10 %). DOP utilization gene dynamics was different among genetic markers and among assemblages (microbialite vs. Although Lake Alchichica is a semiclosed system, this dynamic turnover of phylotypes (from lake circulation to stratification) points to a different potential of DOP utilization by the microbial communities within periods. DOP utilization genes showed different dynamics evidenced by a marked change within an intra-annual period and a differential circadian pattern of expression.

Bacterial alkaline phosphatases ( phoX and phoD) and alkaline beta-propeller phytases ( bpp) were surveyed.

We focused on dissolved organic phosphorus (DOP) utilization gene dynamics during contrasting mixing and stratification periods. In this study, we analyzed the genetic diversity of bacterial phosphorus utilization genes in two microbial assemblages, microbialites and bacterioplankton of Lake Alchichica, a semiclosed (i.e., endorheic) system with marked seasonality that varies in nutrient conditions, temperature, dissolved oxygen, and water column stability. The spatial and temporal dynamics of this genetic diversity should be acknowledged to establish a link between ecosystem function and community structure. Microbes can modulate ecosystem function since they harbor a vast genetic potential for biogeochemical cycling.

Conditions lead to monomictic lake turnover