Aquatic Microbial Ecology最新文献_第4页

CORRIGENDUM: Shifts in phytoplankton community structure modify bacterial production, abundance and community composition 更正:浮游植物群落结构的变化改变了细菌的产生、丰度和群落组成

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-12-02 DOI: 10.3354/ame01868_c

M. Camarena-Gómez, T. Lipsewers, J. Piiparinen, E. Eronen-Rasimus, D. Perez-Quemaliños, L. Hoikkala, C. Sobrino, K. Spilling

引用次数: 0

Seasonal and interannual variation in lower Columbia River phytoplankton (2005-2018): environmental variability and a decline in large bloom-forming diatoms 哥伦比亚河下游浮游植物的季节和年际变化(2005-2018):环境变异性和大型藻华形成硅藻的减少

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-06-17 DOI: 10.3354/AME01967

V. Rose, G. Rollwagen‐Bollens, S. Bollens, J. Zimmerman

{"title":"Seasonal and interannual variation in lower Columbia River phytoplankton (2005-2018): environmental variability and a decline in large bloom-forming diatoms","authors":"V. Rose, G. Rollwagen‐Bollens, S. Bollens, J. Zimmerman","doi":"10.3354/AME01967","DOIUrl":"https://doi.org/10.3354/AME01967","url":null,"abstract":"Understanding the influence of biotic and abiotic factors on riverine phytoplankton dynamics is challenging, particularly as anthropogenic stressors such as eutrophication, invasive species, and climate change alter these relationships. We examined a 14 yr (January 2005 to December 2018) dataset of phytoplankton and water quality variables, along with zooplankton and nutrient concentrations, from the Columbia River (the largest river in the US Pacific Northwest) to identify seasonal and interannual patterns of phytoplankton assemblage structure and their environmental associations. Non-metric multidimensional scaling, cluster, and indicator species analyses revealed: (1) a diatom/flagellate cluster in spring/summer, associated with chlorophyll a, discharge, ciliates, and Sarcodina; (2) a cyanobacteria/chlorophyte cluster in late summer/early fall, associated with higher water temperatures, increased clarity, the invasive copepod Pseudodiaptomus forbesi, and veligers of the invasive Asian clam Corbicula fluminea; and (3) a mixed-taxa winter cluster of minimal abundance and biomass. Nutrients were not strongly associated with the observed structural patterns. Phytoplankton bloom duration varied interannually, between years with short springtime blooms vs. years when blooms extended across multiple months. Springtime blooms of the diatom Asterionella formosa decreased in recent years, giving way to blooms of a mixed diatom assemblage. Further, high temperature, low discharge, and more invasive zooplankton were associated with cyanobacterial blooms, suggesting that increased temperature and reduced river flows predicted due to climate change in the Pacific Northwest may lead to further impacts on the late summer/early fall Columbia River plankton community.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"72 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-06-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74429459","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: 4

Swimming behavior of cryptophyte prey affects prey preference of the ambush-feeding ciliate Mesodinium rubrum 隐虫猎物的游动行为影响埋伏食性纤毛虫的捕食偏好

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-05-06 DOI: 10.3354/AME01964

Houshuo Jiang, Johnson

{"title":"Swimming behavior of cryptophyte prey affects prey preference of the ambush-feeding ciliate Mesodinium rubrum","authors":"Houshuo Jiang, Johnson","doi":"10.3354/AME01964","DOIUrl":"https://doi.org/10.3354/AME01964","url":null,"abstract":"The mixotrophic ciliate Mesodinium rubrum is an ambush feeder relying on cryptophyte prey motility for prey encounter and perception; therefore, cryptophyte species-specific swimming behaviors affect M. rubrum’s prey preference. Here, a high-speed microscale imaging system was used to quantify the swimming behaviors of 3 cryptophyte species (Teleaulax amphioxeia, Storeatula major, and Guillardia theta) and to conduct quantitative microvideography of M. rubrum-T. amphioxeia predator-prey interaction. T. amphioxeia, a preferred prey of M. rubrum, swam at path-averaged speeds of 155 ± 73 µm s-1 along rather straight paths. In contrast, S. major regularly tumbled slowly downward or upward at 64 ± 16 µm s-1, while G. theta moved slowly in looped/curved trajectories at 57 ± 15 µm s-1; neither supports M. rubrum growth. Only while motionlessly sinking passively did M. rubrum detect and initiate an attack on swimming T. amphioxeia at reaction distances of 8.2 ± 8.2 µm. It seemed that M. rubrum needed to use oral tentacles to initially poke T. amphioxeia’s ventral posterior part and subsequently poke the prey multiple times in a short duration to compromise the prey’s escape ability, presumably by discharging extrusomes into the prey. T. amphioxeia also responded to nearby predators by switching to tumbling similar to S. major in normal swimming, suggesting an effective anti-predator defense behavior that prevents M. rubrum from accurately poking the prey’s ventral posterior part. T. amphioxeia swimming at significantly higher speeds leads to sufficiently high prey encounters and hydrodynamic signals for M. rubrum, thereby partially explaining M. rubrum’s ability to select T. amphioxeia prey.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"175 1","pages":"169-184"},"PeriodicalIF":1.4,"publicationDate":"2021-05-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79728693","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: 3

Composition and temporal dynamics of sand-dwelling dinoflagellate communities from three Mediterranean beaches 地中海三个海滩沙栖鞭毛藻群落组成及时间动态

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-04-08 DOI: 10.3354/AME01960

Albert Reñé, M. Hoppenrath, G. Reboul, D. Moreira, P. López‐García

{"title":"Composition and temporal dynamics of sand-dwelling dinoflagellate communities from three Mediterranean beaches","authors":"Albert Reñé, M. Hoppenrath, G. Reboul, D. Moreira, P. López‐García","doi":"10.3354/AME01960","DOIUrl":"https://doi.org/10.3354/AME01960","url":null,"abstract":"Compared to plankton, benthic communities are thought to be heterogeneous among sites and more stable through time; however, benthic protists in general, and sand-dwelling dinoflagellates in particular, have been scarcely studied, and their diversity remains mostly unknown. To test those claims, we studied the diversity, structure and temporal dynamics of benthic dinoflagellate communities in sandy sediments obtained from 3 NW Mediterranean Sea coastal locations during temperate spring and warm summer months. After separating protist cells from the substrate using the seawater-ice method, high-throughput amplicon sequencing of the V4 18S rRNA gene region followed by the analysis of amplicon sequence variants (ASVs) showed similar richness, alpha-diversity, and community composition among sand-dwelling dinoflagellates at the 3 locations. Dinoflagellates affiliating with the Thoracosphaeraceae or Gymnodiniales sensu stricto were highly represented. In contrast, other well-known dinoflagellate taxa, such as Gonyaulacales or Dinophysales, were poorly represented or absent. Dinoflagellate communities showed significant differences between the 2 studied seasons, mainly driven by water temperature. Samples from temperate months had higher diversity and were more dissimilar, while samples from warmer months showed lower diversity and higher similarity. Some species were always present in the community, others only appeared sporadically, and some others showed clear differences between seasons. Our results suggest that large-scale changes (pointing to seasonality) prevail over spatial heterogeneity in shaping community composition. The 3 studied locations had a similar dinoflagellate community composed of sand-dwelling taxa, with many representatives of undescribed species, highlighting the need to further study the diversity of the benthic compartment.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"22 1","pages":"85-98"},"PeriodicalIF":1.4,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"87651761","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: 5

Insights into the planktonic to sessile transition in a marine biofilm-forming Pseudoalteromonas isolate using comparative proteomic analysis 利用比较蛋白质组学分析了解海洋生物膜形成假互生单胞菌从浮游到无根的转变

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-04-08 DOI: 10.3354/AME01959

Zhiwen Wu, Yuyuan Wu, Yanqiu Huang, Jian He, Pei Su, Danqing Feng

{"title":"Insights into the planktonic to sessile transition in a marine biofilm-forming Pseudoalteromonas isolate using comparative proteomic analysis","authors":"Zhiwen Wu, Yuyuan Wu, Yanqiu Huang, Jian He, Pei Su, Danqing Feng","doi":"10.3354/AME01959","DOIUrl":"https://doi.org/10.3354/AME01959","url":null,"abstract":"Bacterial biofilms play an important role in marine biofouling. The formation of a biofilm starts when marine bacterial cells transition from a planktonic to an attached state. However, the molecular mechanisms involved in this transition are poorly understood. Here, 51 strains of marine bacteria were isolated from natural biofilms growing on submerged artificial surfaces (glass slides, epoxy panels, and bridge pillars) and evaluated for their biofilm-forming capacity. Eleven strains formed relatively strong biofilms and 16S rRNA gene sequence analysis indicated that they belonged to the genera Leisingera, Roseobacter, Pseudoalteromonas, Alteromonas, Tenacibaculum, Vibrio, Chryseobacterium, Aquimarina, and Acinetobacter. Strain Pseudoalteromonas sp. W-7 showed efficient and rapid attachment and was therefore chosen for further study. An iTRAQ-based comparative proteomic analysis of planktonic and attached strain W-7 cells was carried out. A total of 3468 proteins were identified, of which 163 showed significant differential expression (120 down-regulated and 43 up-regulated in attached cells relative to planktonic cells). KEGG (Kyoto encyclopedia of genes and genomes) analysis indicated that pyruvate metabolism, carbon fixation, and carbon metabolism were signiﬁcantly affected in attached cells. Up-regulated proteins such as UTP-glucose-1-phosphate uridylyltransferase, acetyltransferase component of pyruvate dehydrogenase complex, OmpA-like protein, and acetyl-coenzyme A synthetase may be important during initial adhesion. Our findings provide a deeper understanding of the planktonic to sessile transition of marine fouling bacteria.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"2016 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"86670840","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: 3

Changes in microbial communities during seawater pre-treatment within a desalination plant 海水淡化厂海水预处理过程中微生物群落的变化

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-03-11 DOI: 10.3354/AME01958

S. Balzano, T. Jamieson, S. Leterme

引用次数: 0

A phosphate starvation response gene (psr1-like) is present and expressed in Micromonas pusilla and other marine algae 一个磷酸饥饿反应基因(psr1样)在pusilla小单胞菌和其他海藻中存在并表达

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-02-25 DOI: 10.3354/ame01955

Cara L. Fiore, Harriet Alexander, Melissa C. Kido Soule, Elizabeth B. Kujawinski

{"title":"A phosphate starvation response gene (psr1-like) is present and expressed in Micromonas pusilla and other marine algae","authors":"Cara L. Fiore, Harriet Alexander, Melissa C. Kido Soule, Elizabeth B. Kujawinski","doi":"10.3354/ame01955","DOIUrl":"https://doi.org/10.3354/ame01955","url":null,"abstract":"ABSTRACT: Phosphorus (P) limits primary production in regions of the surface ocean, and many plankton species exhibit specific physiological responses to P deficiency. The metabolic response of Micromonas pusilla, an ecologically relevant marine photoautotroph, to P deficiency was investigated using metabolomics and comparative genomics. The concentrations of some intracellular metabolites were elevated in the P-deficient cells (e.g. xanthine, inosine), and genes involved in the associated metabolic pathways shared a predicted conserved amino acid motif in the non-coding regions of each gene. The presence of the conserved motif suggests that these genes may be co-regulated, and the motif may constitute a regulatory element for binding a transcription factor, specifically that of Psr1 (phosphate starvation response). A putative phosphate starvation response gene ( psr1-like) was identified in M. pusilla with homology to well characterized psr1/ phr1 genes in algae and plants, respectively. This gene appears to be present and expressed in other marine algal taxa (e.g. Emiliania huxleyi) in field sites that are chronically P limited. Results from the present study have implications for understanding phytoplankton taxon-specific roles in mediating P cycling in the ocean.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"115 3","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-02-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138495413","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

Effects of seawater viscosity and temperature on the movement of the marine dinoflagellate Prorocentrum minimum 海水粘度和温度对海洋鞭毛藻最小原心运动的影响

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-02-11 DOI: 10.3354/AME01957

Abigail S. Tyrell, Houshuo Jiang, N. Fisher

{"title":"Effects of seawater viscosity and temperature on the movement of the marine dinoflagellate Prorocentrum minimum","authors":"Abigail S. Tyrell, Houshuo Jiang, N. Fisher","doi":"10.3354/AME01957","DOIUrl":"https://doi.org/10.3354/AME01957","url":null,"abstract":"It is important to understand how planktonic dinoflagellate movements may be affected by environmental conditions, including those potentially influenced by climate change. Because of their small size, dinoflagellates can be expected to be highly sensitive to changes in viscosity; however, there is currently little understanding of how these organisms and other algae may be regulated by seawater viscosity. Previous work that has addressed the effects of seawater viscosity on single-celled plankton considered unnaturally large viscosity changes from a biomechanical perspective, sometimes without considering temperature effects. We studied the swimming of the dinoflagellate Prorocentrum minimum, a common coastal species, when exposed to environmentally relevant temperature and viscosity changes. P. minimum showed an additive response to seawater viscosity and temperature: cold temperature and high viscosity both slowed swimming speeds. However, seawater temperature and viscosity did not affect the movement direction or linearity of swimming of the dinoflagellates. We argue that temperature-related changes in movement may be partially regulated by a mechanical response to viscosity, which increases at cold temperature. We also propose possible future directions for laboratory and modelling studies.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"68 1","pages":"21-28"},"PeriodicalIF":1.4,"publicationDate":"2021-02-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91009103","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: 2

Microbial communities (bacteria, archaea and eukaryotes) in a temperate estuary during seasonal hypoxia 季节性缺氧条件下温带河口的微生物群落(细菌、古细菌和真核生物)

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-01-01 DOI: 10.3354/ame01982

LF Santoferrara, G. McManus, D. Greenfield, S. Smith

引用次数: 4

Spatio-temporal variation of microphytobenthos biomass, diversity and assemblage structure in the Loire Estuary, France 法国卢瓦尔河口微底栖植物生物量、多样性和群落结构的时空变化

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2021-01-01 DOI: 10.3354/AME01971

Lourenço Ribeiro, I. Benyoucef, M. Poulin, B. Jesus, P. Rosa, V. Méléder, Guoying Du, L. Barillé

{"title":"Spatio-temporal variation of microphytobenthos biomass, diversity and assemblage structure in the Loire Estuary, France","authors":"Lourenço Ribeiro, I. Benyoucef, M. Poulin, B. Jesus, P. Rosa, V. Méléder, Guoying Du, L. Barillé","doi":"10.3354/AME01971","DOIUrl":"https://doi.org/10.3354/AME01971","url":null,"abstract":": Diatom-dominated microphytobenthos (MPB) communities of 4 intertidal mudflats along the meso- and polyhaline reaches of the Loire Estuary, France, were investigated during a year cycle. They were analysed in terms of biomass, diversity, species composition and growth form distribution. The assemblages of the 2 upstream sites were characterised by high biomass and lower diversities and were mostly dominated by epipelon. The 2 downstream, most haline sites had lower biomass and higher diversities and were dominated by both epipelon and tychoplankton. Diversity did not exhibit a clear seasonal signal in the upstream mudflats, but it was higher during the first half of the study in the downstream sites. The coexistence of 2 growth forms seems to increase diversity of the mudflat assemblages. Species distribution was mainly linked to changes in sediment texture and salinity, both with a marked seasonal variability. MPB biomass was inversely related to MPB diversity and positively related to both mud content and the epipelon. MPB diversity was not, however, significantly correlated with mud content. Slight changes in sediment texture, even if causing variations in assemblage composition, did not change overall diversity. The existence of an important and even dominant tychoplanktonic fraction could be considered a distinctive feature of these benthic environments in the Loire, as well as in other macro tidal estuaries.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"87 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76821225","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: 3