Genomic and meta-genomic insights into the functions, diversity and global distribution of haptophyte algae

Penot, Mathias; Dacks, Joel B.; Read, Betsy; Dorrell, Richard G.

doi:10.1080/26388081.2022.2103732

Cited by 14 publications

(9 citation statements)

References 135 publications

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“…Mixotrophy, as an alternative form of nutrition to phototrophy, may aid in survival in oligotrophic environments (Troost et al, 2005). The dominance of noncalcifying haptophyte lineages has been commonly observed in a wide range of open ocean environments including in the Kuroshio region (Endo et al, 2018; Endo & Suzuki, 2019; Penot et al, 2022), whereas calcifying lineages such as Emiliania huxleyi , which was recently proposed as Gephyrocapsa huxleyi because this lineage is nested within the genus Gephyrocapsa (Bendif et al, 2019), form sporadic blooms in coastal and cold waters, where nutrient concentrations are relatively high (Loveday & Smyth, 2018; Merico et al, 2003). A relatively high contribution of the coccolithophore Braarudosphaera sp.…”

Section: Discussionmentioning

confidence: 99%

“…in the Kuroshio region (Endo et al, 2018;Endo & Suzuki, 2019;Penot et al, 2022), whereas calcifying lineages such as Emiliania huxleyi, which was recently proposed as Gephyrocapsa huxleyi because this lineage is nested within the genus Gephyrocapsa (Bendif et al, 2019), form sporadic blooms in coastal and cold waters, where nutrient concentrations are relatively high (Loveday & Smyth, 2018;Merico et al, 2003). A relatively high contribution of the coccolithophore Braarudosphaera sp.…”

Section: Ta B L E 1 Spearman's Rank Correlation Coefficients Between ...mentioning

confidence: 99%

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Haptophyte communities along the Kuroshio current reveal their geographical sources and ecological traits

et al. 2022

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Haptophytes are one of the most ecologically successful phytoplankton groups in the modern ocean and tend to maintain balanced and stable communities across various environments. However, little is known about the mechanisms that enable community stability and ecological success. To reveal the community characteristics and interactions among haptophytes, we conducted comprehensive observations from the upstream to downstream regions of the Kuroshio Current. Haptophyte abundance and taxonomy were assessed using quantitative polymerase chain reaction and metabarcoding of 18S rRNA sequences, respectively. The haptophyte community structure changed abruptly at sites on the shelf‐slope of the East China Sea, indicating the strong influence of shelf waters with high phytoplankton biomass on downstream communities. Correlation network analysis combined with the phylogeny suggested that haptophytes can coexist with their close relatives, possibly owing to their nutritional flexibility, thereby escaping from resource competition. Consistently, some noncalcifying haptophyte genera with high mixotrophic capacities such as Chrysochromulina constituted a major component of the co‐occurrence network, whereas coccolithophores such as Emiliania/Gephyrocapsa were rarely observed. Our study findings suggest that noncalcifying haptophytes play crucial roles in community diversity and stability, and in sustaining the food web structure in the Kuroshio ecosystems.

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Section: Discussionmentioning

confidence: 99%

Section: Ta B L E 1 Spearman's Rank Correlation Coefficients Between ...mentioning

confidence: 99%

Haptophyte communities along the Kuroshio current reveal their geographical sources and ecological traits

et al. 2022

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“…However, the plastid-encoded genes of Haptophyta and Cryptophyta strongly support monophyly in the phylogenetic tree (Kim et al ., 2017). Haptophyta may have acquired the ancestral Cryptophyta plastid before or after massive gene transfer from Stramenopiles, reconciling the two seemingly contradictory phylogenetic trees of different genomes (Dorrell et al ., 2017; Dorrell et al ., 2021; Penot et al ., 2022). LHC genes are nuclear-encoded and should follow the history of nuclear-encoded genes derived from the quaternary endosymbiosis (Stiller et al ., 2014; Dorrell et al ., 2017).…”

Section: Discussionmentioning

confidence: 99%

Unraveling the Evolutionary Trajectory of LHCI in Red-Lineage Algae: Conservation, Diversification, and Neolocalization

Kumazawa,

Ifuku

2024

Preprint

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Red algae and the secondary symbiotic algae that engulfed a red alga as an endosymbiont are called red-lineage algae. They comprise key marine taxa including diatoms, Haptophyta, and Cryptophyta. Several photosystem (PS) I-light-harvesting complex I (LHCI) structures have been reported from red-lineage algae, two red algaeCyanidioschyzon merolae(Cyanidiophyceae),Porphyridium purpureum(Rhodophytina), a diatomChaetoceros gracilisand a CryptophyteChroomonas placoidea. Here, we clarified the orthologous relation of LHCIs in red-lineage algae by combining a detailed phylogenetic analysis of LHCIs and the structural information of PSI-LHCI. We found that the seven Lhcr groups in LHCI are conserved in Rhodophytina; Furthermore, during both genome reduction in Cyanidioschyzonales of red algae and endosymbiosis leading to Cryptophyta, some LHCIs were lost and replaced by existing or differentiated LHCIs. Especially in Cryptophyta, uniquely diversified Lhcrs form three sets of heterotrimers contributed to the expansion of the antenna size of PSI, supporting the modern ecological success of this taxon. We denominated ″neolocalization″ to these examples of flexible reorganization of LHCIs. This study provides new insights into the evolutionary process of LHCIs associated with PSI in the red-lineage algae and clarifies the need for both molecular phylogeny and structural information to elucidate the plausible evolutionary history of LHCI.

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“…Their advantage under warming could be from their competitiveness over other groups in certain nutrient and temperature conditions 56 . Given that haptophytes are important components of phytoplankton worldwide, being potentially toxics and/or mixotrophic 57 , 58 and forming blooms that contribute substantially to regional biogeochemical cycles 59 , 60 , such positive impact of HWs on their relative abundance could significantly alter the functioning of Mediterranean coastal ecosystems in the future. In Thau lagoon, it was already reported that haptophytes could play a dominant role in the phytoplankton community, especially following early spring diatom blooms 61 .…”

Section: Discussionmentioning

confidence: 99%

Functional and structural responses of plankton communities toward consecutive experimental heatwaves in Mediterranean coastal waters

Soulié

Vidussi

Mas

et al. 2023

Sci Rep

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The frequency of marine heatwaves (HWs) is projected to increase in the Mediterranean Sea over the next decades. An in situ mesocosm experiment was performed in a Mediterranean lagoon for 33 days. Three mesocosms were used as controls following the natural temperature of the lagoon. In three others, two HWs of + 5 °C compared to the controls were applied from experimental day (d) 1 to d5 (HW1) and from d11 to d15 (HW2). High-frequency data of oxygen, chlorophyll-a (chl-a), temperature, salinity and light from sensors immersed in all mesocosms were used to calculate gross primary production (GPP), respiration (R) and phytoplankton growth (µ) and loss (L) rates. Nutrients and phytoplankton community structure from pigments were also analyzed. HW1 significantly increased GPP, R, chl-a, µ and L by 7 to 38%. HW2 shifted the system toward heterotrophy by only enhancing R. Thus, the effects of the first HW resulted in the attenuation of those of a second HW on phytoplankton processes, but not on community respiration, which was strongly regulated by temperature. In addition, natural phytoplankton succession from diatoms to haptophytes was altered by both HWs as cyanobacteria and chlorophytes were favored at the expense of haptophytes. These results indicate that HWs have pronounced effects on Mediterranean plankton communities.

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Genomic and meta-genomic insights into the functions, diversity and global distribution of haptophyte algae

Cited by 14 publications

References 135 publications

Haptophyte communities along the Kuroshio current reveal their geographical sources and ecological traits

Haptophyte communities along the Kuroshio current reveal their geographical sources and ecological traits

Unraveling the Evolutionary Trajectory of LHCI in Red-Lineage Algae: Conservation, Diversification, and Neolocalization

Functional and structural responses of plankton communities toward consecutive experimental heatwaves in Mediterranean coastal waters

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