The Community Structure of Picophytoplankton in Lake Fuxian, a Deep and Oligotrophic Mountain Lake

Shi, Xiaoli; Li, Shengnan; Li, Huabing; Chen, Feizhou; Wu, Qinglong L.

doi:10.3389/fmicb.2019.02016

Cited by 8 publications

(7 citation statements)

References 56 publications

(80 reference statements)

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“…Agriculture is one of the main activities in Lake Cajititlán, so it is possible that the abundance of this bacterium is associated with the increase in the concentration of nutrients from fertilizers, mainly during the rainy season, which enhances the runoff of nutrients to the lake. This effect has been observed in several subtropical studies (Munch, 1980;Li et al, 2010;Shi et al, 2019).…”

Section: Dynamics and Abundance Of The Dominant Taxa Of Lake Cajititlánsupporting

confidence: 68%

“…Chlorophyceae is a dominant class in tropical eutrophic shallow lakes, whereas Chrysophyceae is considered characteristic of oligotrophic and mesotrophic waters ( Kristiansen, 1985 ; Chellappa et al, 2008 ; Silva et al, 2014 ). However, its dominance in subtropical and eutrophic water bodies has been detected during the summer season, with its presence being associated with the addition of allochthonous nutrients ( Munch, 1980 ; Shi et al, 2019 ).…”

Section: Resultsmentioning

confidence: 99%

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Rapid Changes in the Phytoplankton Community of a Subtropical, Shallow, Hypereutrophic Lake During the Rainy Season

Díaz-Torres

Anda²,

Lugo-Melchor³

et al. 2021

Front. Microbiol.

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Lake Cajititlán is a small, shallow, subtropical lake located in an endorheic basin in western Mexico. It is characterized by a strong seasonality of climate with pronounced wet and dry seasons and has been classified as a hypereutrophic lake. This eutrophication was driven by improperly treated sewage discharges from four municipal wastewater treatment plants (WWTPs) and by excessive agricultural activities, including the overuse of fertilizers that reach the lake through surface runoff during the rainy season. This nutrient rich runoff has caused algal blooms, which have led to anoxic or hypoxic conditions, resulting in large-scale fish deaths that have occurred during or immediately after the rainy season. This study investigated the changes in the phytoplankton community in Lake Cajititlán during the rainy season and the association between these changes and the physicochemical water quality and environmental parameters measured in the lake’s basin. Planktothrix and Cylindrospermopsis were the dominant genera of the cyanobacterial community, while the Chlorophyceae, Chrysophyceae, and Trebouxiophyceae classes dominated the microalgae community. However, the results showed a significant temporal shift in the phytoplankton communities in Lake Cajititlán induced by the rainy season. The findings of this study suggest that significant climatic variations cause high seasonal surface runoff and rapid changes in the water quality (Chlorophyll-a, DO, NH4+, and NO3–) and in variations in the composition of the phytoplankton community. Finally, an alternation between phosphorus and nitrogen limitation was observed in Lake Cajititlán during the rainy season, clearly correlating to the presence of Planktothrix when the lake was limited by phosphorus and to the presence of Cylindrospermopsis when the lake was limited by nitrogen. The evidence presented in this study supports the idea that the death of fish in Lake Cajititlán could be mainly caused by anoxia, caused by rapid changes in water quality during the rainy season. Based on our review of the literature, this is the first study on the phytoplankton community in a subtropical lake during the rainy season using high throughput 16S rRNA and 18S rRNA amplicon sequencing.

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Section: Dynamics and Abundance Of The Dominant Taxa Of Lake Cajititlánsupporting

confidence: 68%

Section: Resultsmentioning

confidence: 99%

Rapid Changes in the Phytoplankton Community of a Subtropical, Shallow, Hypereutrophic Lake During the Rainy Season

Díaz-Torres

Anda²,

Lugo-Melchor³

et al. 2021

Front. Microbiol.

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“…Similarly, previous studies conducted in Ireland Estuary and Bengal Bay noticed a positive tight coupling between pH and DO (O'Boyle et al, 2013;Shaik et al, 2017). The significant correlation between pH and phytoplankton (both TChla concentrations and picophytoplankton density) indicated that biological activities had a substantial effect on pH (Shi et al, 2019). In general, when any aquatic environment is governed by autotrophy, CO 2 is eliminated by photosynthesis, resulting in a rise in pH values.…”

Section: Discussionsupporting

confidence: 63%

Spatial Distribution of Picophytoplankton in Southeastern Coast of Peninsular Malaysia Using Flow Cytometry

Amin¹,

Idris²,

Mudiman³

et al. 2021

JST

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The distribution of picocyanobacteria from two genera, Synechococcus and Prochlorococcus, and picoeukaryotes in surface water (0.5 m) was investigated by flow cytometry in the southeastern coast of Peninsular Malaysia during the Southwest monsoon in August 2014. During the cruise, Synechococcus cells were predominant throughout the study area, contributing as much as 50% to the total picophytoplankton population, whereas picoeukaryotes and Prochlorococcus constituted only 31% and 19% of the population, respectively. Spatially, Synechococcus and picoeukaryotes were more dominant in coastal waters, while Prochlorococcus appeared to be more highly abundant in offshore waters. Furthermore, the percentage contribution of each population to total picophytoplankton also exhibited different spatial distribution patterns along a coastal-offshore gradient. The percentage contribution of Synechococcus was spatially constant throughout the study area, while the fraction contributed by picoeukaryotes showed a reduced contribution from coastal to offshore waters. In contrast, Prochlorococcus exhibited an increased proportion to total picophytoplankton across a coastal-offshore gradient, suggesting the increasing importance of this population in offshore waters of the study area. As revealed by Canonical Correlation Analysis, the abundance of Synechococcus and picoeukaryotes increased significantly with reducing dissolved oxygen levels and pH, and with increasing total chlorophyll. In contrast, temperature was the only factor influencing the abundance of Prochlorococcus significantly increased with decreasing water temperature in the study area. Overall, results of the present study provide valuable information on the role of regional environmental factors in the distribution and dominance of picophytoplankton communities that are not only critical for the ocean productivity but also the impact on the carbon cycle in the study area.

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“…Regrettably, understanding about the taxonomic composition of picoeukaryotic algae in freshwater systems is still largely lacking although there have been some very good recent inputs about the community composition and diversity of Peuk [ 4 , 24 , 55 , 59 ]. Diatoms are usually considered as a common part of microplankton (20–200 μm) but nearly 20 species of diatoms in marine systems have one of their cell dimensions below 3 μm [ 60 ].…”

Section: Discussionmentioning

confidence: 99%

“…Peuk have been treated as a bulk assemblage for decades since most of the traditional approaches to PPP quantification (epifluorescence microscopy, flow cytometry) are deficient in taxonomic resolution [ 23 ]. More recently, molecular methods have exposed a wide diversity of Peuk and have started to fill knowledge gaps in their taxonomic diversity [ 24 – 26 ]. However, metabarcoding as a qualitative analysis does not provide data for the comparisons of the relative abundances among different taxonomic groups [ 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes

Tamm

Nõges²,

Nõges³

et al. 2022

PLoS ONE

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Photoautotrophic picoplankton (0.2–2 μm) can be a major contributor to primary production and play a significant part in the ecosystem carbon flow. However, the understanding about the dynamics of both eukaryotic and prokaryotic components of picoplankton in shallow eutrophic freshwater environments is still poor. Very few studies in these ecosystems reveal the taxonomic composition of picoeukaryotes. The main objective of this study was to investigate the seasonal dynamics of phototrophic picoplankton with the emphasis on the eukaryote community composition in a large shallow, eutrophic lake of the northern temperate zone (Lake Võrtsjärv). Phytoplankton pigments were employed to determine the taxonomic composition of photoautotrophic picoplankton. We found out that photoautotrophic picoplankton constitutes an important part of the phytoplankton community in Lake Võrtsjärv and its contribution can be highly variable (from ~9.3% to ~39%) in different years. The eukaryotic photoautotrophic picoplankton was dominated by diatoms followed by chrysophytes and other minor groups. Picoeukaryotes were prevailing in low-light conditions and low temperatures as their predominance in the picoplankton community was tightly linked to the presence or absence of ice cover. Ice cover strongly suppressed the growth of picocyanobacteria. Total phosphorus, turbidity and metazooplankton abundance had a clear relationship with photoautotrophic picoplankton chlorophyll a.

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The Community Structure of Picophytoplankton in Lake Fuxian, a Deep and Oligotrophic Mountain Lake

Cited by 8 publications

References 56 publications

Rapid Changes in the Phytoplankton Community of a Subtropical, Shallow, Hypereutrophic Lake During the Rainy Season

Rapid Changes in the Phytoplankton Community of a Subtropical, Shallow, Hypereutrophic Lake During the Rainy Season

Spatial Distribution of Picophytoplankton in Southeastern Coast of Peninsular Malaysia Using Flow Cytometry

Factors influencing the pigment composition and dynamics of photoautotrophic picoplankton in shallow eutrophic lakes

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