Influence of Light Availability and Prey Type on the Growth and Photo-Physiological Rates of the Mixotroph Noctiluca scintillans

Gomes, Helga do Rosário; McKee, Kali; Mile, Anxhela; Thandapu, Sharanya; Al-Hashmi, Khalid; Jiang, Xiaojian; Goés, Joaquim I.

doi:10.3389/fmars.2018.00374

Cited by 22 publications

(17 citation statements)

References 53 publications

(88 reference statements)

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Secondly, our earlier work had ascribed the advent of Noctiluca blooms to the upshoaling of hypoxic waters in the euphotic zone 35 , caused by a possible expansion of the AS's permanent oxygen minimum zone (OMZ) 45 . In this study 35 , we showed using shipboard experiments in which natural populations were exposed to suboxic seawater 36 that endosymbionts in Noctiluca cells photosynthesized more efficiently under suboxic conditions. More recent studies 33,34,39 , have attributed the advent of Noctiluca blooms to acute "silicate stress", a situation that would prevent diatom populations from attaining bloom proportions, particularly in the northwestern AS where they have been the predominant algal group in the past 28,29,32,46 .…”

Section: Resultsmentioning

confidence: 89%

“…3b,c) is unparalleled for any open ocean ecosystem. In this nutrient-poor scenario, we contend that as with other mixotrophs 48 , Noctiluca's dual mode of obtaining nutrients 36 , confers upon it a significant competitive advantage over autotrophic phytoplankton especially when nutrients are limiting. When feeding on external prey, Noctiluca accumulates large amounts of nitrogen as ammonium (0.003-0.012 μM NH 4…”

Section: Resultsmentioning

confidence: 97%

“…Rather, this is due to blooms of the mixotrophic green dinoflagellate Noctiluca scintillans Suriray (synonym Noctiluca scintillans Macartney) [29][30][31][32][33][34] . Since they were first detected in the early 2000s 29,31,32,35,36 green Noctiluca blooms have become increasingly more pervasive over diatoms ( Fig. S5) and more widespread, occurring every winter with predictable regularity 33,[35][36][37][38][39][40] .…”

Section: Resultsmentioning

confidence: 99%

“…Firstly, as a mixotroph 31,35,41 , Noctiluca can meet its metabolic requirements via autotrophic CO 2 fixation by thousands of free-swimming prasinophyte symbionts: Protoeuglena noctilucae 42 within its central vacuole (symbiosome) (Fig. S6), and also via heterotrophic feeding on a wide range of external prey including phytoplankton, micro-and mesozooplankton and zooplankton eggs 36,41,43 . This mixotrophic mode of feeding gives green www.nature.com/scientificreports www.nature.com/scientificreports/ Noctiluca a trophic advantage over both autotrophic and heterotrophic plankton and makes it different from the globally ubiqutous red Noctiluca species, which are devoid of endosymbionts and exclusively heterotrophic 44 .…”

Section: Resultsmentioning

confidence: 99%

“…+ cell −1 ) within its central cytoplasm 36 , alleviating its dependence on extraneous NO 3 . Feeding on external phytoplankton prey also reduces the standing stock of autotrophs competing for seawater nutrients, providing an additional advantage for Noctiluca.…”

Section: Resultsmentioning

confidence: 99%

See 4 more Smart Citations

Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region

Goés

Tian

Gomes

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

The recent trend of global warming has exerted a disproportionately strong influence on the Eurasian land surface, causing a steady decline in snow cover extent over the Himalayan-tibetan plateau region. Here we show that this loss of snow is undermining winter convective mixing and causing stratification of the upper layer of the Arabian Sea at a much faster rate than predicted by global climate models. over the past four decades, the Arabian Sea has also experienced a profound loss of inorganic nitrate. in all probability, this is due to increased denitrification caused by the expansion of the permanent oxygen minimum zone and consequent changes in nutrient stoichiometries. these exceptional changes appear to be creating a niche particularly favorable to the mixotroph, Noctiluca scintillans which has recently replaced diatoms as the dominant winter, bloom forming organism. Although Noctiluca blooms are non-toxic, they can cause fish mortality by exacerbating oxygen deficiency and ammonification of seawater. As a consequence, their continued range expansion represents a significant and growing threat for regional fisheries and the welfare of coastal populations dependent on the Arabian Sea for sustenance. The Arabian Sea (AS) is a unique, low-latitude oceanic ecosystem because it is influenced by monsoonal winds that reverse their direction seasonally 1. These reversing winds cause dynamic shifts in surface currents and alterations in the pycnocline, which help fertilize its normally nutrient-depleted surface layers. However, the mechanisms that drive water-column mixing, the upward transport of nutrients and the consequent upsurge of phytoplankton biomass during the summer (Jun.-Sep.) and the winter (Nov.-Feb.) monsoons are different 2-6. During the summer monsoon, nutrient enrichment is via coastal upwelling, which begins when the adjacent land mass becomes warmer relative to the AS, and low pressure develops over the Arabian Peninsula 3,7,8. During this time of the year, strong topographically-steered southwesterly winds blowing over the AS form a low-level atmospheric jet called the Findlater Jet 9. This jet induces a northeastwardly flow of the surface currents, leading to strong upwelling of deep, nutrient-rich waters, causing large phytoplankton blooms along the coasts of Somalia, Yemen, and Oman 3,5,6,10,11. In contrast, during winter, when the Eurasian continent cools, nutrient enrichment is via deep penetrative convective mixing as a result of excessive heat loss from the AS surface layer caused by cold and dry northeasterly winds blowing from the snow-covered Himalayan-Tibetan Plateau (HTP) 4,5. The erosion of the thermocline, and entrainment of deep (100-150 m) nutrient-rich waters into the surface layer of the AS, begins as early as Dec., and has a major influence on winter phytoplankton blooms observable as far south as 14°N 4,11,12 .

show abstract

Section: Resultsmentioning

confidence: 89%

Section: Resultsmentioning

confidence: 97%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region

Goés

Tian

Gomes

et al. 2020

Sci Rep

Self Cite

View full text Add to dashboard Cite

show abstract

Importance of integrating mixoplankton into marine ecosystem policy and management—Examples from the Marine Strategy Framework Directive

Anschütz,

Maselli,

Traboni

et al. 2024

Integr Envir Assess & Manag

View full text Add to dashboard Cite

Marine plankton capable of photosynthesis and predation (“mixoplankton”) comprise up to 50% of protist plankton and include many harmful species. However, marine environmental management policies, including the European Union Marine Strategy Framework Directive (MSFD) and the USEPA, assume a strict dichotomy between autotrophic phytoplankton and heterotrophic zooplankton. Mixoplankton often differ significantly from these two categories in their response to environmental pressures and affect the marine environment in ways we are only beginning to understand. While the management policies may conceptually provide scope for incorporating mixoplankton, such action is rarely implemented. We suggest that the effectiveness of monitoring and management programs could benefit from explicit implementations regarding the ecological roles and impact of mixoplankton. Taking the MSFD as an example of marine management guidelines, we propose appropriate methods to explicitly include mixoplankton in monitoring and marine management. Integr Environ Assess Manag 2024;00:1–18. © 2024 The Authors. Integrated Environmental Assessment and Management published by Wiley Periodicals LLC on behalf of Society of Environmental Toxicology & Chemistry (SETAC).

show abstract

Reporting of methods for automated devices: A systematic review and recommendation for studies using FlowCam for phytoplankton

Owen

Hallett

Cosgrove³

et al. 2022

Limnology & Ocean Methods

View full text Add to dashboard Cite

Accurate and detailed reporting of methods is essential for scientific progress, yet it is widely accepted that authors across all scientific fields tend to provide insufficient methods detail. Given the recent proliferation of automated and semi‐automated technologies for data collection, to address this widespread issue the details needed for interpretation and reproducibility for each specific technique first need to be identified. A systematic literature review assessed the comprehensiveness of method details reported by 116 peer‐reviewed studies published between 2017 and 2020 using the FlowCam (a widely used imaging flow cytometer) to image phytoplankton, finding all to be lacking in critical details, inhibiting reproducibility, and limiting the veracity of some findings. Through this review and three case studies, we identify several key method details that should be reported by FlowCam studies to ensure their findings are credible, comparable, and replicable and illustrate the wide‐reaching implications for not doing so. Future studies using FlowCam for phytoplankton analyses should ensure clear reporting of all relevant details relating to the FlowCam unit, sample preparation, run settings, post‐processing of images, and the considered use of only verified measurement outputs. A methods reporting template is presented as a guideline intended to enhance the quality, interpretability, and repeatability of future FlowCam papers. The pervasiveness of inadequacies in FlowCam methods reporting identified here highlights how vital it is for users of any automated or semi‐automated scientific technologies to have a clear understanding of the impact of all method details on their findings, and to report these details adequately.

show abstract

Influence of Light Availability and Prey Type on the Growth and Photo-Physiological Rates of the Mixotroph Noctiluca scintillans

Cited by 22 publications

References 53 publications

Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region

Ecosystem state change in the Arabian Sea fuelled by the recent loss of snow over the Himalayan-Tibetan Plateau region

Importance of integrating mixoplankton into marine ecosystem policy and management—Examples from the Marine Strategy Framework Directive

Reporting of methods for automated devices: A systematic review and recommendation for studies using FlowCam for phytoplankton

Contact Info

Product

Resources

About