Aquatic Microbial Ecology最新文献

Near-benthic coral reef picoplankton vary at fine scales decoupled from benthic cover 近底栖珊瑚礁微浮游生物在与底栖覆盖物脱钩的精细尺度上各不相同

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-09-12 DOI: 10.3354/ame02011

Austin Greene, Yogesh Girdhar, Amy Apprill

{"title":"Near-benthic coral reef picoplankton vary at fine scales decoupled from benthic cover","authors":"Austin Greene, Yogesh Girdhar, Amy Apprill","doi":"10.3354/ame02011","DOIUrl":"https://doi.org/10.3354/ame02011","url":null,"abstract":"ABSTRACT: Seawater microorganisms impact ecological and biogeochemical cycling on coral reefs and are sensitive indicators of ecosystem status. Microbialization, a shift towards trophic collapse and resultant high microbial biomass, is a global concern on coral reefs. Indeed, macroorganisms can influence microbial processes and community composition on reefs, which is best understood as increased macroalgae resulting in copiotrophic microbial growth and oxygen reduction. Whether or not smaller-scale changes in macroorganisms influence the overlying seawater microbial communities is largely unknown. Here, we assessed seawater microorganisms across 3 coral reefs to understand their connection to reef site and within-reef benthic characteristics. At 3 coral reefs in St. John, US Virgin Islands, we collected 60 ml seawater samples 2 cm above the seafloor, spaced 2 m apart in a grid pattern, and assessed bacterial and archaeal communities via sequencing of small subunit ribosomal RNA genes. Benthic cover within 1 m of each sample was determined at 10 cm resolution through photogrammetry. Our results reveal that overall reef site overwhelmingly shapes microbial community structure, while within-reef benthic cover surrounding sample locations has minimal influence. However, ecospheres as areas that reflect the small-scale effects of benthic cover directly under each sample, significantly explain as much as 12.1% of within-reef microbial variation and may even outweigh variation attributable to reef site alone. These findings provide new insights into fine-scale spatial variability in reef seawater microbiomes that are crucial for the use of microorganisms as indicators of microbialization and coral reef health.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"26 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210031","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Shore and mid-channel surveys reveal distinct phytoplankton-bacterial population associations along an urban estuary 海岸和河道中段调查揭示了一个城市河口沿岸浮游植物与细菌种群之间的独特联系

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-09-12 DOI: 10.3354/ame02012

Georgie E. Humphries, Mariapaola Ambrosone, Zabdiel Roldan-Ayala, Maximillian Brown, Dianne I. Greenfield

{"title":"Shore and mid-channel surveys reveal distinct phytoplankton-bacterial population associations along an urban estuary","authors":"Georgie E. Humphries, Mariapaola Ambrosone, Zabdiel Roldan-Ayala, Maximillian Brown, Dianne I. Greenfield","doi":"10.3354/ame02012","DOIUrl":"https://doi.org/10.3354/ame02012","url":null,"abstract":"ABSTRACT: A growing body of literature has highlighted the importance of phytoplankton-bacterial associations to marine and estuarine ecological and biogeochemical function, but their population linkages remain sparsely characterized within urban estuaries. Since many developed coastlines are heavily impacted by anthropogenic nutrient inputs, elucidating their phytoplankton-bacterial dynamics provides insight into nutrient cycling, productivity, and can help inform water quality management. This study compared surface (0.5 m depth) physical water quality, cell abundances of major phytoplankton taxa and bacteria, as well as concentrations of chlorophyll a (chl a) and dissolved organic matter (DOM) in the nitrogen (N)-enriched Western Long Island Sound (WLIS), USA, between mid-channel and shore sites (in 2020 and 2021). Shore bacterial and phytoplankton abundances as well as DOM concentrations (primarily dissolved organic N and carbon [DOC]), were significantly higher than mid-channel, especially during summer, indicative of terrestrial loading influencing microbial assemblages as well as N and C cycling. Abundances of key phytoplankton taxa were better indicators of bacterial abundances than chl a, as bacterial abundances positively and significantly correlated with those of dinoflagellates, especially the most common genera Prorocentrum (mid-channel, shore) and Heterocapsa (shore only), but not with diatoms. However, pennate diatom abundances negatively and significantly correlated with DOC concentrations in the mid-channel. Results highlight the impact of terrestrial inputs on WLIS microbial assemblage dynamics, presumably by favoring bacteria and dinoflagellate population coupling, as well as shed new ecological insight into how phytoplankton and bacterial communities respond to nutrient loadings in urban estuaries.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"259 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210027","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Complementary chromatic acclimation by shifts in phycobiliprotein spectral absorption in the cryptophyte Hemiselmis pacifica 隐花植物太平洋半知母（Hemiselmis pacifica）通过藻体脂蛋白光谱吸收的变化实现互补色度适应

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-09-12 DOI: 10.3354/ame02010

Ian D. Jin, Tammi L. Richardson

{"title":"Complementary chromatic acclimation by shifts in phycobiliprotein spectral absorption in the cryptophyte Hemiselmis pacifica","authors":"Ian D. Jin, Tammi L. Richardson","doi":"10.3354/ame02010","DOIUrl":"https://doi.org/10.3354/ame02010","url":null,"abstract":"ABSTRACT: Cryptophytes are eukaryotic microalgae found in a variety of aquatic environments, from tea-colored ponds and lakes to the blue-water open ocean. To broaden the range of their spectral absorption beyond the limits of chlorophyll a, cryptophytes contain phycobiliprotein (PBP) accessory pigments. Hemiselmis pacifica contains the PBP cryptophyte-phycocyanin 577 (Cr-PC 577), which allows it to absorb green to orange wavelengths of light. Here, we characterized variability in PBP absorbance and growth rates of H. pacifica when this species was grown in nutrient-rich environments of differing spectral quality but equal light intensity. Two weeks after a shift from white to green light, H. pacifica altered the absorbance of its Cr-PC 577 to increase capture of green photons. Further, these complementary shifts were reversible when cultures were returned to the white-light environment, and the timescale of the reversal was faster than the original shift (~1 wk). Growth rates of H. pacifica in green light (0.25 d-1) were lower than in white-light controls (0.32 d-1), but not significantly different from cells grown in red light (0.27 d-1). The ability to adjust quickly to changes in light quality may confer an ecological advantage to cryptophytes when their environment is affected by processes such as eutrophication, deforestation/afforestation, or browning.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"33 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142210028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Salinity gradient differentiates potential novel ecotypes and diversity of Labyrinthulomycetes protists along the Haihe River, northern China 盐度梯度区分了中国北方海河沿岸迷宫菌原生动物的潜在新生态类型和多样性

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-06-27 DOI: 10.3354/ame02009

Mohan Bai, Jiaqian Li, Xueyan Ding, Xiuping Liu, Yaodong He, Guangyi Wang

{"title":"Salinity gradient differentiates potential novel ecotypes and diversity of Labyrinthulomycetes protists along the Haihe River, northern China","authors":"Mohan Bai, Jiaqian Li, Xueyan Ding, Xiuping Liu, Yaodong He, Guangyi Wang","doi":"10.3354/ame02009","DOIUrl":"https://doi.org/10.3354/ame02009","url":null,"abstract":"ABSTRACT: With a ubiquitous presence in marine ecosystems, Labyrinthulomycetes protists (LP) play critical ecological roles in oceanic habitats. Recently, some LP strains have been suggested to survive in low-salinity environments, but their distribution in freshwaters was largely unknown. This study investigated LP abundance and diversity dynamics along a fresh-saltwater gradient in 2 seasons. LP were detected in all samples. Although LP abundance in freshwaters (typically 104 to 105 copies l-1) was significantly lower than that in saline waters, their abundance still corresponded to that of previously reported LP in some coastal waters, suggesting their potentially essential roles in riverine ecosystems. High-throughput sequencing analyses identified 110, 54, and 146 LP amplicon sequence variants (ASVs) in fresh, brackish, and saline waters, respectively. Canonical correspondence analysis and variance partitioning analysis further indicated that salinity and temperature were the most significant environmental factors to affect LP community structure. Notably, most of the dominant ASVs in fresh/brackish waters were annotated to a rarely reported Labyrinthulida family, Amphitraemidae, and a newly identified river cluster of the order Thraustochytrida, which were significantly different from those of saline waters. Finally, the metabolic capabilities of the detected LP genera suggest that LP likely play diverse ecological roles in riverine ecosystems.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"8 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-06-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141503577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Species sorting as the major driver of turnover for both planktonic and periphytic bacteria and the subgroup cyanobacteria in a subtropical lake system 物种分类是亚热带湖泊系统中浮游和附生细菌以及蓝藻亚群更替的主要驱动力

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-05-30 DOI: 10.3354/ame02008

Karine Felix Ribeiro, Ng Haig They, Marla Sonaira Lima, Michele Bertoni Mann, Ana Paula Guedes Frazzon, Jeverson Frazzon, Leandro Duarte, Luciane Oliveira Crossetti

{"title":"Species sorting as the major driver of turnover for both planktonic and periphytic bacteria and the subgroup cyanobacteria in a subtropical lake system","authors":"Karine Felix Ribeiro, Ng Haig They, Marla Sonaira Lima, Michele Bertoni Mann, Ana Paula Guedes Frazzon, Jeverson Frazzon, Leandro Duarte, Luciane Oliveira Crossetti","doi":"10.3354/ame02008","DOIUrl":"https://doi.org/10.3354/ame02008","url":null,"abstract":"ABSTRACT: We explored the ecological drivers of β-diversity patterns in bacterial assemblages sharing a same ecosystem but from different habitats (planktonic and periphytic) and belonging to different functional groups (bacteria and the subgroup cyanobacteria). Assemblages were characterized based on the 16S rRNA gene in a subtropical lake system comprising 5 lakes at a maximum distance of 50 km. We measured the influence of environmental heterogeneity and geographic distance (as a proxy of dispersal) on β-diversity and its components (species replacement and species loss). Bacterial membership clearly differed between planktonic and periphytic assemblages, with most operational taxonomical units being exclusive to a single habitat. Species replacement was the major component explaining the β-diversity patterns of bacteria regardless of habitat and functional group, which was mainly influenced by environmental heterogeneity in all cases. Moreover, when compared to planktonic ones, periphytic assemblages presented higher species replacement rates with geographic distance. In conclusion, our results highlight species sorting as the major driver for bacteria and the subgroup cyanobacteria in both habitat types, with a minor influence of the dispersal limitation for periphytic assemblages, which can be explained due to their substrate-attached trait.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"64 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141197917","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Interactions between bacteria and microalgae in microalgal-bacterial symbiotic wastewater treatment systems: mechanisms and influencing factors 微藻-细菌共生废水处理系统中细菌和微藻之间的相互作用：机制和影响因素

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2024-04-04 DOI: 10.3354/ame02007

Linxue Qi, Xiuhong Liu, Yongqing Gao, Qing Yang, Ziheng Wang, Nan Zhang, Xueying Su

{"title":"Interactions between bacteria and microalgae in microalgal-bacterial symbiotic wastewater treatment systems: mechanisms and influencing factors","authors":"Linxue Qi, Xiuhong Liu, Yongqing Gao, Qing Yang, Ziheng Wang, Nan Zhang, Xueying Su","doi":"10.3354/ame02007","DOIUrl":"https://doi.org/10.3354/ame02007","url":null,"abstract":"ABSTRACT: Microalgal-bacterial symbiotic wastewater treatment systems (MBSWTSs) have received widespread attention due to their capacity to achieve high pollutant removal efficiency during wastewater treatment, with low energy consumption requirements, efficient carbon sequestration, and wastewater resource utilization. This paper provides an overview of the treatment performance and current research status of MBSWTSs, including a detailed summary of the mechanisms of nitrogen, phosphorus, and carbon removal by MBSWTSs and the interactions between bacteria and microalgae. In particular, this review focuses on the influence of operational parameters on the regulation of the symbiotic system, such as the microalgal:bacterial ratio, N:P ratio, external carbon source, dissolved oxygen concentration, aeration mode, and light availability. Among these factors, the microalgal:bacterial ratio, carbon source, and light availability have an important influence on microalgal-bacterial competition, as well as the trophic mode of the system, biomass production, and the capacity for the process to be practically applied on a large scale. MBSWTSs still have some challenging aspects that have hindered their development and application, such as the unknown mechanism of microalgal-bacterial co-metabolism, limited previous practical applications, algal contamination, and harvesting difficulties. To overcome these challenges, future research requires a multidisciplinary approach, incorporating life sciences, material science, and other disciplines. Comprehensive research should be conducted on the metabolic mechanisms of MBSWTSs, the optimization of process performance and waste resource utilization, providing a theoretical and practical foundation for the practical application of MBSWTSs.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"14 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2024-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140585344","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quorum sensing signal disrupts viral infection dynamics in the coccolithophore Emiliania huxleyi 群体感应信号破坏huxleyi球石藻的病毒感染动力学

4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2023-06-15 DOI: 10.3354/ame01998

EL Harvey, H Yang, E Castiblanco, M Coolahan, G Dallmeyer-Drennen, N Fukuda, E Greene, M Gonsalves, S Smith, KE Whalen

{"title":"Quorum sensing signal disrupts viral infection dynamics in the coccolithophore Emiliania huxleyi","authors":"EL Harvey, H Yang, E Castiblanco, M Coolahan, G Dallmeyer-Drennen, N Fukuda, E Greene, M Gonsalves, S Smith, KE Whalen","doi":"10.3354/ame01998","DOIUrl":"https://doi.org/10.3354/ame01998","url":null,"abstract":"Viruses that infect phytoplankton are abundant in all regions of the global ocean. Despite their ubiquity, little is understood regarding how biotic interactions can alter virus infection success as well as the fate of phytoplankton hosts. In previous work, the bacterially derived compound 2-heptyl-4-quinolone (HHQ) has been shown to protect the cosmopolitan coccolithophore Emiliania huxleyi from virus-induced mortality. The present study explores the potential mechanisms through which protection is conferred. Using a suite of transmission electron microscopy and physiological diagnostic staining techniques, we show that when E. huxleyi is exposed to HHQ, viruses can gain entry into cells but viral replication and release is inhibited. These findings are supported by a smaller burst size, as well as lower infectious and total virus production when the host is treated with nanomolar concentrations of HHQ. Additionally, diagnostic staining results indicate that programmed cell death markers commonly associated with viral infection are not activated when infected E. huxleyi are exposed to HHQ. Together, these results suggest that the ability of HHQ to inhibit infectious viral production protects the alga not from getting infected, but from cell lysis. This work identifies a new mechanistic role of bacterial quorum sensing molecules in mediating viral infections in marine microbial systems.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"70 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135673197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Spatial and temporal dynamics of coastal benthic microbial communities along a salinity gradient 沿海底栖微生物群落沿盐度梯度的时空动态

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2023-01-01 DOI: 10.3354/ame02002

HC Petersen, R. Sapkota, AL Hiillos, BW Hansen, GT Banta, KE Knott

引用次数: 0

Compositional responses of aquatic bacterial communities and their network interactions to phytoplankton-derived dissolved organic matter from freshwater ponds 水生细菌群落组成及其网络相互作用对淡水池塘浮游植物衍生溶解有机质的响应

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2023-01-01 DOI: 10.3354/ame01997

F. Yan, J. Wang, J. Dong, Y. Zhu, J. Yan, J. Zhang, H. Lu, Z. Yu, G. Xu

引用次数: 0

Distinct bacterial communities associated with photosynthetic picoeukaryotes in Lake Dongting throughout the seasonal cycle as revealed by flow cytometry sorting 通过流式细胞术分选，洞庭湖不同季节周期与光合微真核生物相关的细菌群落