Aquatic Microbial Ecology最新文献_第10页

Spatial variation of bacterial and fungal communities of estuarine seagrass leaf microbiomes 河口海草叶片微生物群落细菌和真菌群落的空间变异

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2020-01-01 DOI: 10.3354/ame01926

S. Trevathan-Tackett, T. Allnutt, C. Sherman, M. Richardson, T. Crowley, P. Macreadie

{"title":"Spatial variation of bacterial and fungal communities of estuarine seagrass leaf microbiomes","authors":"S. Trevathan-Tackett, T. Allnutt, C. Sherman, M. Richardson, T. Crowley, P. Macreadie","doi":"10.3354/ame01926","DOIUrl":"https://doi.org/10.3354/ame01926","url":null,"abstract":"The health of seagrass plants, and thereby the ecosystems they form, is linked to their associated microbial communities. However, the role of the microbiome in holobiont function and health remains poorly understood for most seagrass species and environmental pressures, and there is, therefore, a need to better understand the drivers behind the formation of and external influences on the seagrass microbiome. Using a core microbiome framework, we characterised the leaf microbiomes of 6 estuarine seagrass populations after a precipitation event to explore how the microbiomes vary across different sites and salinities over a regional spatial scale. We found that each estuary had distinct core bacterial community structures (beta-diversity), but shared a more similar fungal core community structure. We hypothesise that the differences in the bacterial members of the microbiomes among estuaries are generally the result of each estuary being influenced by unique watersheds and sources of prokaryotes. In contrast, the similarity in the core fungal communities suggests that the eukaryotic components of the microbiomes are likely under selection or result from similar colonisation pathway(s). We also found that the bacterial taxa driving the differences among estuaries were linked to the salinity of the estuary, likely due to (1) the general epibiotic nature of colonisation (i.e. watershed source and exposure) and (2) members or functional groups within the leaf microbiome assisting seagrasses in coping with the extreme salinities. These results are valuable for linking microbiomes to the resilience of seagrasses living within dynamic estuaries experiencing a range of physicochemical pressures.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"1 1","pages":"59-74"},"PeriodicalIF":1.4,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91013720","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: 13

Stable and labile associations of microorganisms with the cyanobacterium Nodularia spumigena 微生物与藻芽蓝藻的稳定和不稳定关系

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-11-28 DOI: 10.3354/ame01918

F. Eigemann, H. Schulz-Vogt

引用次数: 3

Past and present infestation of the stalked ciliate Zoothamnium sp. on copepods in the Klang Strait 巴生海峡桡足类动物中有柄纤毛虫的历史和现状

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-11-14 DOI: 10.3354/ame01920

H. Goh, L. Chew, C. Bong, C. Ng, V. Chong

{"title":"Past and present infestation of the stalked ciliate Zoothamnium sp. on copepods in the Klang Strait","authors":"H. Goh, L. Chew, C. Bong, C. Ng, V. Chong","doi":"10.3354/ame01920","DOIUrl":"https://doi.org/10.3354/ame01920","url":null,"abstract":"Ciliate−copepod epibiosis is a common but poorly understood phenomenon in the aquatic environment. This study investigated the prevalence of ciliate infestation on copepods in the Klang Strait, Straits of Malacca. We hypothesized that anthropogenic impacts in the strait have increased ciliate epibiont infestation. Zooplankton samples were collected in 2013−2014 and compared to samples collected from the same 5 stations in 1985−1986, prior to the establishment of the Kapar Power Station (KPS). The 5 sampling sites, including 1 impact (I) and 4 control (C1−C4) stations, were located along an 18 km transect ranging from near the KPS (I) to progressively further offshore (C4). Ciliate epibionts on the copepods belonged to an unidentified Zoothamnium species; 14 copepod species were infested by this ciliate. The highest infestation prevalence occurred in 5 key calanoid species: Paracalanus aculeatus, Acrocalanus gibber, Labidocera euchaeta, Parvocalanus crassirostris and Subeucalanus subcrassus. Before-after-control-impact-pairs (BACI) analysis showed that infestations were more prevalent at all stations in 2013−2014 compared to 1985−1986 and were lowest at or nearest the impact site. The prosome of the copepod was the body part most susceptible to attachment by the ciliate. Generally, the density of infested copepods and their epibiont loads were positively correlated with copepod abundance. Only the density of infested A. gibber showed a significant positive relationship with water temperature, while in P. aculeatus the infested copepod density was significantly correlated with phytoplankton abundance after a lag of 2 mo. We suggest that sea warming and eutrophication in recent years have increased ciliate−copepod epibiosis in the Klang Strait.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"333 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2019-11-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75063648","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

B12 production by marine microbial communities and Dinoroseobacter shibae continuous cultures under different growth and respiration rates 不同生长速率和呼吸速率下海洋微生物群落和船纹藻杆菌连续培养的B12产量

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-10-30 DOI: 10.3354/ame01921

J. Villegas-Mendoza, R. Cajal-Medrano, H. Maske

{"title":"B12 production by marine microbial communities and Dinoroseobacter shibae continuous cultures under different growth and respiration rates","authors":"J. Villegas-Mendoza, R. Cajal-Medrano, H. Maske","doi":"10.3354/ame01921","DOIUrl":"https://doi.org/10.3354/ame01921","url":null,"abstract":"In situ dissolved B12 concentration in marine ecosystems is controlled by the balance between rates of release of B12 by prokaryotes, uptake by prokaryotes and eukaryotes, and abiotic degradation. We used chemostats at a range of specific growth rates (μ, d−1; 0.1 to 1) with natural communities of prokaryotes and monospecific cultures of a B12 producer, Dinoroseobacter shibae. We measured the dissolved B12 concentration produced in the culture (B12-d), the B12 in the particulate fraction (B12-p), cell concentration, respiration rate, particulate organic carbon and nitrogen (POC, PON), and the 16S amplicon composition. Total dissolved B12 concentrations (0.92 to 4.90 pmol l−1) were comparable to those found in the surface ocean. B12-p concentration was 6 to 35 times higher than B12-d. B12-d, B12-p, and community composition showed no relation to μ for either natural populations or D. shibae. The chemostats allowed calculation of the rates of production: B12-d (0.34 ± 0.28 pmol l−1 d−1) and B12-p (5.65 ± 2.34 pmol l−1 d−1), and the B12 cell quota (900 to 3300 molecules cell−1). In multispecies and D. shibae cultures, B12 production rates per cell in creased with respiration rates (volumetric or per cell), and with rates of cellular organic carbon and nitrogen production. Rates increased with μ, but not the concentrations of B12-d or of B12-p. To understand the physiological and ecological dynamics of B12, concentrations alone are insufficient since they do not provide rates, which are important in understanding the dynamics between producers and consumers.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"161 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2019-10-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74793999","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

Succession of bacteria and fungi in leaf litter of tree hole habitats: responses of diversity to mosquito larvae 树洞生境凋落叶中细菌和真菌的演替:多样性对蚊子幼虫的响应

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-10-17 DOI: 10.3354/AME01916

B. Norman, E. Walker

引用次数: 0

Agricultural land use impacts microbial community structure of streambed sediments 农地利用对河床沉积物微生物群落结构的影响

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-10-02 DOI: 10.3354/AME01905

C. Griffith, P. Shang, Yuehan Lu, E. Theuerkauf, Antonio B Rodriguez, R. Findlay

引用次数: 1

Nutrient pollution degrades microbialites in Lough Carra, an Irish marl lake 爱尔兰沼泽湖卡拉湖的营养物污染使微生物退化

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-09-19 DOI: 10.3354/AME01917

P. Doddy, C. Roden, M. Gammell

引用次数: 3

Predator-prey interactions between the ciliate Blepharisma americanum and toxic (Microcystis spp.) and non-toxic (Chlorella vulgaris, Microcystis sp.) photosynthetic microbes 纤毛虫ble法利赛马美洲与有毒(微囊藻属)和无毒(小球藻属，微囊藻属)光合微生物之间的捕食者-猎物相互作用

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-09-19 DOI: 10.3354/AME01913

I. Chapman, D. J. Franklin, A. Turner, E. McCarthy, G. Esteban

{"title":"Predator-prey interactions between the ciliate Blepharisma americanum and toxic (Microcystis spp.) and non-toxic (Chlorella vulgaris, Microcystis sp.) photosynthetic microbes","authors":"I. Chapman, D. J. Franklin, A. Turner, E. McCarthy, G. Esteban","doi":"10.3354/AME01913","DOIUrl":"https://doi.org/10.3354/AME01913","url":null,"abstract":"Despite free-living protozoa being a major factor in modifying aquatic autotrophic biomass ciliate cyanobacteria interactions and their functional ecological roles have been poorly described, especially with toxic cyanobacteria. Trophic relationships have been neglected and grazing experiments give contradictory evidence when toxic taxa such as Microcystis are involved. Here two toxic Microcystis strains (containing microcystins), one non-toxic Microcystis strain and a non-toxic green alga, Chlorella vulgaris, were used to investigate predator-prey interactions with a phagotrophic ciliate, Blepharisma americanum. Flow cytometric analysis for microalgal measurements and a rapid UHPLC-MS/MS protocol to quantify microcystins showed non-toxic photosynthetic microbes were significantly grazed by B. americanum, which sustained ciliate populations. In contrast, despite constant ingestion of toxic Microcystis rapid egestion of cells occurred. The lack of digestion resulted in no significant control of toxic cyanobacteria densities, a complete reduction in ciliate numbers, and no observable encystment or cannibalistic behaviour (gigantism). Individual B. americanum morphological responses (biovolume and cell width) showed a significant decrease over time when sustained on non-toxic Microcystis compared 55 to grazed C. vulgaris populations, supporting previous studies that cyanobacteria may be a relatively poor source of nutrition. Results here provide an insight into the ecological interactions of ciliates and cyanobacteria, and for the first time B. americanum is shown to have the capacity to suppress potentially bloom-forming cyanobacteria. However, grazing can be significantly altered by the presence of microcystins, which could have an impact on bloom dynamics and overall community structure.","PeriodicalId":8112,"journal":{"name":"Aquatic Microbial Ecology","volume":"107 1","pages":""},"PeriodicalIF":1.4,"publicationDate":"2019-09-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75676401","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

Mamiellophyceae shift in seasonal predominance in the Baltic Sea 波罗的海哺乳动物的季节优势变化

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-08-22 DOI: 10.3354/AME01915

M. Majaneva, Sara Enberg, R. Autio, J. Blomster, Janne-Markus Rintala

引用次数: 5

Calculation of hypolimnic denitrification in a dimictic freshwater lake during summer stratification 二元化淡水湖夏季分层时低硝化反硝化作用的计算

IF 1.4 4区环境科学与生态学

Aquatic Microbial Ecology Pub Date : 2019-08-22 DOI: 10.3354/AME01911

M. Martienssen, J. Böllmann, B. Nixdorf, K. Rathsack

引用次数: 1