Abundance and microbial diversity from surface to deep water layers over the Rio Grande Rise, South Atlantic

Ferreira, Juliana Correa Neiva; Bergo, Natascha Menezes; Tura, Pedro Marone; Chuqui, Mateus G.; Brandini, Frederico Pereira; Jovane, Luigi; Pellizari, Vivian Helena

doi:10.1016/j.pocean.2021.102736

Cited by 12 publications

(2 citation statements)

References 102 publications

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“…Bacteria are predominant in the majority of samples. Many factors contribute to the prokaryote diversity in ocean habitats, such as the availability of organic components and particulate matter, pelagic zones, and depth [ 15 , 45 , 46 ]. The variability of the number of bacteria is an issue addressed in several studies.…”

Section: Discussionmentioning

confidence: 99%

Metagenomic Analyses Reveal the Influence of Depth Layers on Marine Biodiversity on Tropical and Subtropical Regions

et al. 2023

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The emergence of open ocean global-scale studies provided important information about the genomics of oceanic microbial communities. Metagenomic analyses shed light on the structure of marine habitats, unraveling the biodiversity of different water masses. Many biological and environmental factors can contribute to marine organism composition, such as depth. However, much remains unknown about microbial communities’ taxonomic and functional features in different water layer depths. Here, we performed a metagenomic analysis of 76 publicly available samples from the Tara Ocean Project, distributed in 8 collection stations located in tropical or subtropical regions, and sampled from three layers of depth (surface water layer—SRF, deep chlorophyll maximum layer—DCM, and mesopelagic zone—MES). The SRF and DCM depth layers are similar in abundance and diversity, while the MES layer presents greater diversity than the other layers. Diversity clustering analysis shows differences regarding the taxonomic content of samples. At the domain level, bacteria prevail in most samples, and the MES layer presents the highest proportion of archaea among all samples. Taken together, our results indicate that the depth layer influences microbial sample composition and diversity.

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Section: Discussionmentioning

confidence: 99%

Metagenomic Analyses Reveal the Influence of Depth Layers on Marine Biodiversity on Tropical and Subtropical Regions

et al. 2023

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“…Traditional survey methods, such as morphological identification and trawling, are labor-intensive, time-consuming, invasive, and taxa-specific, thus hindering largescale surveys of deep-sea ecosystems (Beng and Corlett, 2020). Meanwhile, environmental DNA (eDNA) metabarcoding approaches are increasingly used to characterize deep-sea biodiversity across various seafloor habitats (Cowart et al, 2020;Klunder et al, 2020;Laroche et al, 2020b;Bergo et al, 2022;Ferreira et al, 2022;Diao et al, 2023). This method offers several advantages, including cost-effectiveness, environmental nondestructiveness, the ability to detect a wide range of taxa, and efficiency in surveying large and hard-to-access ecosystems with high sensitivity and statistically meaningful sample sizes (Brandt et al, 2020;Le et al, 2022).…”

Section: Introductionmentioning

confidence: 99%

Biodiversity and community structures across the Magellan seamounts and abyssal plains in the western Pacific Ocean revealed by environmental DNA metabarcoding analysis

Kim,

Ju,

Suh

2024

Front. Mar. Sci.

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Seamounts within deep-sea ecosystems are recognized as biodiversity hotspots, yet they are increasingly threatened by anthropogenic activities such as overfishing, resource exploitation, and climate change. To establish environmental baseline data and assess the impacts of current or future anthropogenic activities, we conducted environmental DNA (eDNA) metabarcoding analyses to comprehensively characterize prokaryotic and eukaryotic diversity across various water depths of the Magellan seamounts and the adjacent abyssal plains. Metabarcoding analysis revealed higher richness and diversity in both prokaryotic and eukaryotic communities within the seamounts compared to the abyssal plains. Overall, the analysis identified 9,068 prokaryotic amplicon sequence variants (ASVs), representing 39 phyla and 47 classes. Similarly, 4,569 eukaryotic ASVs were identified, spanning 34 phyla and 93 classes. Furthermore, our results revealed distinct community structures between the seamounts and abyssal plains, with turnover across different water depths. These findings are crucial as they indicate the unique ecological roles and potential vulnerability of seamount communities, emphasizing the need for targeted conservation strategies. Our study underscores the importance of conducting comprehensive long-term environmental assessments of the impacts of anthropogenic activities on seamount ecosystems and highlights the potential of eDNA metabarcoding as a powerful tool for guiding conservation and management efforts in remote and challenging marine environments.

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Hydrochar Utilization for Saline‐Alkali Soil Amelioration and Its Carbon Sequestration Potential Assessment

Shen,

Jiang,

Tang

et al. 2024

Advanced Sustainable Systems

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For the current situation of saline‐alkali soil amelioration, it is urgent to explore a multi‐objective amelioration strategy involving crop income increase and environmental benefits. This study used pine‐needle hydrochar to ameliorate saline‐alkali soil and conducted column and pot experiments to investigate its effects on soil properties and crop growth. And the environmental advantages of hydrochar are evaluated through Life Cycle Assessment (LCA). The electrical conductivity, exchangeable sodium percentage, and pH of saline‐alkali soil ameliorated with hydrochar using the column elution method are reduced by 60%, 58%, and 1.2 pH units, respectively, compared to the original soil. Also, the gene copy number of the ameliorated soil has doubled according to qPCR determination. Pot experiment results show that the root length, fresh weight, and germination rate of wheatgrass are increased by 107, 75, and 20%, respectively. These results demonstrated that the exchange of Na+ with H+ released from hydrochar reduced the soil alkalinity and the viability of organisms is enhanced. Moreover, based on this study's data including the hydrochar dosage and wheatgrass yield, the LCA results showed 3.7 × 109 t CO2e carbon sequestration potential and significant environmental benefits.

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Abundance and microbial diversity from surface to deep water layers over the Rio Grande Rise, South Atlantic

Cited by 12 publications

References 102 publications

Metagenomic Analyses Reveal the Influence of Depth Layers on Marine Biodiversity on Tropical and Subtropical Regions

Metagenomic Analyses Reveal the Influence of Depth Layers on Marine Biodiversity on Tropical and Subtropical Regions

Biodiversity and community structures across the Magellan seamounts and abyssal plains in the western Pacific Ocean revealed by environmental DNA metabarcoding analysis

Hydrochar Utilization for Saline‐Alkali Soil Amelioration and Its Carbon Sequestration Potential Assessment

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