Spatial dynamics of active microeukaryotes along a latitudinal gradient: Diversity, assembly process, and co-occurrence relationships

Xu, Dapeng; Kong, Hejun; Yang, Eun Jin; Wang, Ying; Li, Xinran; Sun, Ping; Jiao, Nianzhi; Lee, Young-Ju; Jung, Jinyoung; Cho, Kyoung‐Ho

doi:10.1016/j.envres.2022.113234

Cited by 8 publications

(9 citation statements)

References 115 publications

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“…Samples were collected on board IBRV ARAON in the summer of 2016 (Expedition ARA07) as detailed in [45,46]. A total of fourteen sites were sampled (Figure 1, Table S1).…”

Section: Sample Collection and Measurement Of Environmental Parametersmentioning

confidence: 99%

“…Water samples for RNA extraction from the surface water and SCM layer were collected as described in [46]. Seawater was prefiltered through a 200 µm mesh (Nitex, Sefar) to remove large metazoans.…”

Section: Sample Collection and Measurement Of Environmental Parametersmentioning

confidence: 99%

“…The environmental parameters of the surface water and SCM layer were reported in [46] (Table S2). The depth of the SCM layer ranged from 15 m at B2 to 62 m at B29.…”

Section: Environmental Parametersmentioning

confidence: 99%

“…The striking difference in temperature, salinity, nutrients, and light between the surface water and SCM layer has resulted in distinct community compositions of microbial eukaryotes in diverse marine environments, including the AO [41,46,77,78]. In the Southeast Pacific Ocean, Red Sea, Mediterranean Sea, Norwegian coast, and the central Pacific Ocean, previous studies have reported contrasting haptophyte communities in the surface water and SCM layer [20,55,59,79,80].…”

Section: Beta Diversity Taxonomic Composition and Environmental Drivi...mentioning

confidence: 99%

“…Therefore, the RNA-based community is more sensitive to environmental factors than the DNA-based community [39]. Molecular surveys of Arctic microbial eukaryotes have been conducted for more than a decade [40][41][42][43][44][45][46][47]. To the best of our knowledge, 3 of 16 no molecular surveys focusing solely on haptophyte assemblages have been conducted, despite the fact that members of this group may play critical roles in the element cycling of AO's microbial food webs, such as by forming blooms, grazing on other microorganisms, or participating in CO 2 and nitrogen fixation [13,48].…”

Section: Introductionmentioning

confidence: 99%

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Contrasting Community Composition and Co-Occurrence Relationships of the Active Pico-Sized Haptophytes in the Surface and Subsurface Chlorophyll Maximum Layers of the Arctic Ocean in Summer

et al. 2022

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Haptophytes (Hacrobia: Haptophyta), which can perform phototrophic, phagotrophic, or mixotrophic nutritional modes, are critical for element cycling in a variety of aquatic ecosystems. However, their diversity, particularly in the changing Arctic Ocean (AO), remains largely unknown. In the present study, the biodiversity, community composition, and co-occurrence networks of pico-sized haptophytes in the surface water and subsurface chlorophyll maximum (SCM) layer of the AO were explored. Our results found higher alpha diversity estimates in the surface water compared with in the SCM based on high-throughput sequencing of haptophyte specific 18S rRNA. The community composition of the surface water was significantly different from that of the SCM, and water temperature was identified as the primary factor shaping the community compositions. Prymnesiales (mostly Chrysochromulina), uncultured Prymnesiophyceae, and Phaeocystis dominated the surface water communities, whereas Phaeocystis dominated the SCM communities, followed by Chrysochromulina, uncultured Prymnesiophyceae, and the remaining taxa. The communities of the surface water and SCM layer developed relatively independent modules in the metacommunity network. Nodes in the surface water were more closely connected to one another than those in the SCM. Network stability analysis revealed that surface water networks were more stable than SCM networks. These findings suggest that SCM communities are more susceptible to environmental fluctuations than those in surface water and that future global changes (e.g., global warming) may profoundly influence the development, persistence, and service of SCM in the AO.

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“…Samples were collected on board IBRV ARAON in the summer of 2016 (Expedition ARA07) as detailed in [45,46]. A total of fourteen sites were sampled (Figure 1, Table S1).…”

Section: Sample Collection and Measurement Of Environmental Parametersmentioning

confidence: 99%

Section: Sample Collection and Measurement Of Environmental Parametersmentioning

confidence: 99%

“…The environmental parameters of the surface water and SCM layer were reported in [46] (Table S2). The depth of the SCM layer ranged from 15 m at B2 to 62 m at B29.…”

Section: Environmental Parametersmentioning

confidence: 99%