Contrasting Mechanisms Determine the Microeukaryotic and Syndiniales Community Assembly in a Eutrophic bay

Yan, Yi; Lin, Tenghui; Xie, Weijuan; Zhang, Demin; Jiang, Zhibing; Han, Qingxi; Zhu, Xiangyu; Zhang, Huajun

doi:10.1007/s00248-023-02175-0

Cited by 4 publications

(5 citation statements)

References 67 publications

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“…A high prevalence of parasitic protists was also recorded in our diel sampling, with the highest contribution of Syndiniales. Their wide distribution and genetic diversity due to their ability to colonize a wide range of ecological niches, which was also represented in our results ( 39 – 43 ). Parasitism is an important source of mortality within marine protist communities, though it is seldom accounted for in ecosystem and biogeochemical models ( 44 ).…”

Section: Discussionsupporting

confidence: 82%

Insight into planktonic protistan and fungal communities across the nutrient-depleted environment of the South Pacific Subtropical Gyre

Kajan,

Fuchs,

Orlić

2024

Microbiol Spectr

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Our findings carry important implications for understanding the distribution patterns of the previously unrecognized occurrence of parasitic protists and functionally diverse fungi in the nutrient-limited South Pacific Gyre. In particular, our study reveals a significant presence of parasitic Syndiniales, predominantly abundant in the upper 300 m of the aphotic zone in the gyre, and a distinct presence of fungal communities in the aphotic zone at the central part of the gyre. These findings strongly suggest that these communities play a substantial role in yet insufficiently described microbial food web. Moreover, our research enhances our understanding of their contribution to the dynamics of the food webs in oligotrophic gyres and is valuable for projecting the ecological consequences of future climate warming.

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Section: Discussionsupporting

confidence: 82%

Insight into planktonic protistan and fungal communities across the nutrient-depleted environment of the South Pacific Subtropical Gyre

Kajan,

Fuchs,

Orlić

2024

Microbiol Spectr

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“…This correlation may help explain its dominant role in the network. Moreover, Syndiniales are generalist and opportunistic parasites that can infect various marine hosts across different trophic levels ( 29 ). Small-size dinoflagellates, including Gymnodinium and Heterocapsa species, are potential hosts for Syndiniales ( 29 ).…”

Section: Discussionmentioning

confidence: 99%

“…Moreover, Syndiniales are generalist and opportunistic parasites that can infect various marine hosts across different trophic levels ( 29 ). Small-size dinoflagellates, including Gymnodinium and Heterocapsa species, are potential hosts for Syndiniales ( 29 ). Dinoflagellates can survive in harsh environments because of the presence of cysts and typically have relatively low adaptation to environmental changes ( 68 ).…”

Section: Discussionmentioning

confidence: 99%

“…When nutrients are sufficient, these dinoflagellates predominantly function as phototrophs; however, during less favorable environments, they resort to consuming prey ( 69 ). As a dominant diatom species in the XSB, S. costatum also served as a potential host for Syndiniales and as a food source for mixotrophic or heterotrophic dinoflagellates ( 29 , 44 ). Furthermore, based on nutrient levels, diatoms and dinoflagellates can intensively interact with each other because diatoms typically show a positive correlation with nitrate and a negative association with ammonium, while the opposite scenario is usually observed in dinoflagellates ( 23 ).…”

Section: Discussionmentioning

confidence: 99%

“…Total DNA was extracted using a Power Soil DNA Isolation Kit (MO BIO, Carlsbad, CA). The previously reported protocol of PCR, purification, and library construction was followed ( 29 ). Finally, the V4 hypervariable region of the 18S rRNA gene was used for paired-end (2 × 300 bp) sequencing on an Illumina MiSeq platform.…”

Section: Methodsmentioning

confidence: 99%

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Interaction patterns and assembly mechanisms of dinoflagellates and diatoms in a coastal bay suffering from long-term eutrophication

Miao,

Wang,

Lin

et al. 2024

mSphere

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Dinoflagellates and diatoms are highly prevalent and ecologically important phytoplankton in coastal waters, greatly contributing to primary productivity in marine ecosystems. Although their composition and diversity have been extensively elucidated in the open ocean, their interaction patterns and community assembly in long-term eutrophic coastal waters remain poorly understood. This investigation aimed to elucidate the seasonal successional patterns of dinoflagellates and diatoms by 18S rRNA gene amplicon sequencing in a semi-enclosed bay. The results revealed that dinoflagellate and diatom communities have pronounced seasonal succession patterns, which are primarily associated with temperature. Furthermore, the most prevalent species throughout the year were Heterocapsa rotundata and Skeletonema costatum . Moreover, the assembly of dinoflagellate and diatom communities was mainly dominated by stochastic processes, with drift being the major factor. The co-occurrence of dinoflagellates and diatoms showed seasonal patterns, with the highest interactions observed in autumn. In addition, interactions of Syndiniales with dinoflagellates and diatoms highlighted the roles of parasites in eutrophic conditions. Flavobacteriaceae and Rhodobacteraceae are the bacterial taxa that most frequently interacted with dinoflagellates and diatoms, with interactions between dinoflagellates and bacteria being more complex than those between diatoms and bacteria. Overall, this study provides results that deepen our understanding of the phytoplankton dynamics in coastal eutrophic waters. IMPORTANCE Dinoflagellates and diatoms are major phytoplankton groups in coastal waters. The composition and diversity of dinoflagellates and diatoms in the open ocean have been well documented; however, it remains uncertain to what extent their adaptation to long-term eutrophic conditions influences their response to environmental disturbances. Here, we investigated the interactions and assembly processes of dinoflagellates and diatoms in a eutrophic bay throughout the whole year. Our findings revealed that interactions between dinoflagellates and diatoms are primarily shaped by seasonal transitions, while prolonged eutrophic conditions tend to amplify stochastic processes in community assembly. These findings provide novel perspectives on the influence of long-term eutrophication on phytoplankton dynamics within eutrophic waters.

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Diversity and distribution analysis of eukaryotic communities in the Xiangshan Bay, East China sea by metabarcoding approach

Li,

Luo,

et al. 2024

Marine Environmental Research

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Contrasting Mechanisms Determine the Microeukaryotic and Syndiniales Community Assembly in a Eutrophic bay

Cited by 4 publications

References 67 publications

Insight into planktonic protistan and fungal communities across the nutrient-depleted environment of the South Pacific Subtropical Gyre

Insight into planktonic protistan and fungal communities across the nutrient-depleted environment of the South Pacific Subtropical Gyre

Interaction patterns and assembly mechanisms of dinoflagellates and diatoms in a coastal bay suffering from long-term eutrophication

Diversity and distribution analysis of eukaryotic communities in the Xiangshan Bay, East China sea by metabarcoding approach

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