Using empirical dynamic modeling to assess relationships between atmospheric trace gases and eukaryotic phytoplankton populations in coastal Southern California

Wilson, Jesse M.; Carter, Melissa; Mühle, Jens; Bowman, Jeff S.

doi:10.1016/j.marchem.2020.103896

Cited by 3 publications

(4 citation statements)

References 63 publications

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“…Seasonality was also apparent in many of the non‐summer TMs and subnetworks, which we attribute to the availability of substrates and nutrients. For example, the ‘fall–winter’ TM and subnetwork dominated during winter, which is generally a less productive time (Fargion et al ., 1993; Kim et al ., 2009; Nagarkar et al ., 2018; Wilson et al ., 2020). The decreased resources (e.g., nutrients) translated to lower chlorophyll a , eukaryotic phytoplankton populations and an absence of larger AF populations (Figs 1A–E, 3, and 4).…”

Section: Discussionmentioning

confidence: 99%

“…For each sampling, surface water was collected using a bucket off the Scripps Pier at approximately 10:00 AM and transferred to acid washed containers that were brought back to the laboratory for immediate analysis. Bi‐weekly concentrations of nutrients, chlorophyll a and phaeophytin, and weekly counts of diatoms, dinoflagellates and total phytoplankton were provided by SCCOOS (https://sccoos.org/) and the McGowan Plankton and Chlorophyll Program (see, Wilson et al ., 2020 for methods). Continuous temperature, water depth (hydrostatic pressure) and salinity at the Scripps Pier were provided by the SCCOOS Automated Shore Station Program (https://erddap.sccoos.org/erddap/tabledap/autoss.html).…”

Section: Methodsmentioning

confidence: 99%

“…These include purely physical processes such as tides, advection and vertical mixing, as well as biological processes such as primary production and grazing. The microbial community is part of this changing seascape, with microbes both responding to and affecting change in their surroundings (Needham et al ., 2018; Wilson et al ., 2018; Wilson et al ., 2020).…”

Section: Introductionmentioning

confidence: 99%

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Recurrent microbial community types driven by nearshore and seasonal processes in coastal Southern California

Wilson

Chamberlain

Erazo

et al. 2021

Environmental Microbiology

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A multitude of concurrent biological and physical processes contribute to microbial community turnover, especially in highly dynamic coastal environments. Characterizing what factors contribute most to shifts in microbial community structure and the specific organisms that correlate with changes in the products of photosynthesis improves our understanding of nearshore microbial ecosystem functions. We conducted high frequency sampling in nearshore Southern California in order to capture sub-weekly microbial community dynamics. Microbial communities were characterized by flow cytometry and 16S rRNA gene sequencing, and placed in the context of physicochemical parameters. Within our time-series, season and nutrient availability corresponded to changes in dominant microbial community members. Concurrent aseasonal drivers with overlapping scales of variability were also apparent when we used network analysis to assess the microbial community as subsets of the whole. Our analyses revealed the microbial community as a mosaic, with overlapping groups of taxa that varied on different timescales and correlated with unique abiotic and biotic factors. Specifically, a subnetwork associated with chlorophyll a exhibited rapid turnover, indicating that ecologically important subsets of the microbial community can change on timescales different than and in response to factors other than those that govern turnover of most members of the assemblage.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Recurrent microbial community types driven by nearshore and seasonal processes in coastal Southern California

Wilson

Chamberlain

Erazo

et al. 2021

Environmental Microbiology

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“…While Lingulodinium polyedra blooms occurred in both 2019 and 2020, the 2020 bloom possessed cell concentrations almost 50x higher than the 2019 bloom (Figure 1C). According to light microscopy counts performed during regular SCCOOS sampling (Hatch et al, 2013;Wilson et al, 2020), L. polyedra concentrations were on the order of 10 2 and 10 3 cells L -1 in the spring of 2020, before they increased to 10 4 cells L -1 on March 30, 2020. Seawater had visible red bands by April 7, 2020, and filters had visible red pigmentation beginning April 16 through May 14, 2020.…”

Section: Phytoplankton Variationmentioning

confidence: 99%

Substantial microbial community shifts in response to an exceptional harmful algal bloom in coastal Southern California

Wilson

Erazo

Connors

et al. 2022

Elementa: Science of the Anthropocene

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Phytoplankton blooms create organic matter that stimulates entire marine ecosystems, including other components of the microbial community. How the ecosystem responds varies depending on the intensity, duration, and composition of the bloom. When the bloom has a direct or indirect negative impact on the ecosystem, it is termed a harmful algal bloom (HAB). HAB frequency is expected to increase in response to changing oceanic conditions and coastal nutrient supply. Characterizing the response of the bacterial and archaeal communities to HABs will improve our understanding of the ecological impacts of these phenomena. We utilized time series of chlorophyll a, phaeophytin, dissolved oxygen, flow cytometry cell counts, and microbial community structure (assessed via 16S rRNA gene sequences) maintained by several observing programs to investigate how the microbial community was affected by an exceptional bloom of Lingulodinium polyedra in coastal Southern California. These multi-year datasets allowed us to compare the microbial community response to past events, such as a smaller L. polyedra bloom the previous year. We demonstrated that the bacterial and archaeal response to the 2020 bloom was unique taxonomically, with many novel heterotrophs, and higher trophic state variance. The measured heterotrophic response to the bloom resulted in massive oxygen drawdown and may have impacted the length of the bloom and contributed to a secondary diatom bloom following the main HAB event. Taken together, these data illustrate how the massive 2020 L. polyedra bloom created unique ecological conditions for coastal Southern California.

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Uncovering the causal relationships in plant-microbe ecosystems: A time series analysis of the duckweed cultivation system for biomass production and wastewater treatment

Ishizawa,

Tashiro,

Okada

et al. 2024

Science of The Total Environment

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Using empirical dynamic modeling to assess relationships between atmospheric trace gases and eukaryotic phytoplankton populations in coastal Southern California

Cited by 3 publications

References 63 publications

Recurrent microbial community types driven by nearshore and seasonal processes in coastal Southern California

Recurrent microbial community types driven by nearshore and seasonal processes in coastal Southern California

Substantial microbial community shifts in response to an exceptional harmful algal bloom in coastal Southern California

Uncovering the causal relationships in plant-microbe ecosystems: A time series analysis of the duckweed cultivation system for biomass production and wastewater treatment

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