Base de dados : MEDLINE
Pesquisa : B01.680 [Categoria DeCS]
Referências encontradas : 57 [refinar]
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[PMID]:29377905
[Au] Autor:Bird C; Darling KF; Russell AD; Fehrenbacher JS; Davis CV; Free A; Ngwenya BT
[Ad] Endereço:School of Geosciences, University of Edinburgh, Edinburgh, United Kingdom.
[Ti] Título:16S rRNA gene metabarcoding and TEM reveals different ecological strategies within the genus Neogloboquadrina (planktonic foraminifer).
[So] Source:PLoS One;13(1):e0191653, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Uncovering the complexities of trophic and metabolic interactions among microorganisms is essential for the understanding of marine biogeochemical cycling and modelling climate-driven ecosystem shifts. High-throughput DNA sequencing methods provide valuable tools for examining these complex interactions, although this remains challenging, as many microorganisms are difficult to isolate, identify and culture. We use two species of planktonic foraminifera from the climatically susceptible, palaeoceanographically important genus Neogloboquadrina, as ideal test microorganisms for the application of 16S rRNA gene metabarcoding. Neogloboquadrina dutertrei and Neogloboquadrina incompta were collected from the California Current and subjected to either 16S rRNA gene metabarcoding, fluorescence microscopy, or transmission electron microscopy (TEM) to investigate their species-specific trophic interactions and potential symbiotic associations. 53-99% of 16S rRNA gene sequences recovered from two specimens of N. dutertrei were assigned to a single operational taxonomic unit (OTU) from a chloroplast of the phylum Stramenopile. TEM observations confirmed the presence of numerous intact coccoid algae within the host cell, consistent with algal symbionts. Based on sequence data and observed ultrastructure, we taxonomically assign the putative algal symbionts to Pelagophyceae and not Chrysophyceae, as previously reported in this species. In addition, our data shows that N. dutertrei feeds on protists within particulate organic matter (POM), but not on bacteria as a major food source. In total contrast, of OTUs recovered from three N. incompta specimens, 83-95% were assigned to bacterial classes Alteromonadales and Vibrionales of the order Gammaproteobacteria. TEM demonstrates that these bacteria are a food source, not putative symbionts. Contrary to the current view that non-spinose foraminifera are predominantly herbivorous, neither N. dutertrei nor N. incompta contained significant numbers of phytoplankton OTUs. We present an alternative view of their trophic interactions and discuss these results within the context of modelling global planktonic foraminiferal abundances in response to high-latitude climate change.
[Mh] Termos MeSH primário: Código de Barras de DNA Taxonômico
RNA Ribossômico 16S/genética
Rhizaria/genética
[Mh] Termos MeSH secundário: Microscopia Eletrônica de Transmissão
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (RNA, Ribosomal, 16S)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180309
[Lr] Data última revisão:
180309
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180130
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191653


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[PMID]:28418627
[Au] Autor:Angell IL; Hanssen JF; Rudi K
[Ad] Endereço:Department of Chemistry, Biotechnology and Food Science, Norweigan University of Life Sciences, Ås, Norway.
[Ti] Título:Prokaryote species richness is positively correlated with eukaryote abundance in wastewater treatment biofilms.
[So] Source:Lett Appl Microbiol;65(1):66-72, 2017 Jul.
[Is] ISSN:1472-765X
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Biological treatment represents a key step in nutrient removal from wastewater. Until now these process has mainly been considered prokaryotic, with the interactions between prokaryotes and eukaryotes not being properly explored. We therefore investigated the co-occurrence of eukaryotes and prokaryotes in biological nitrogen removal biofilms. We found that biofilms in the nitrifying reactor contained the highest diversity and abundance of both prokaryotes and eukaryotes, with nearly three times higher prokaryote species richness than for the denitrifying reactor. The positive associations between eukaryote abundance and prokaryote diversity could potentially be explained by mutualism - and/or predator/prey interactions. Further mechanistic insight, however, is needed to determine the main diversifying mechanisms. In summary, eukaryote and prokaryote interactions seem to play a fundamental yet underexplored role in biological wastewater treatment. SIGNIFICANCE AND IMPACT OF THE STUDY: Eukaryote and prokaryote interactions may play an important role in wastewater treatment. This study found that prokaryote species richness was nearly three times higher in the aerobe nitrification than in an anaerobe denitrification reactor, coinciding with the highest level of eukaryotes. This knowledge can be important in process control, and potentially in the development of novel approaches based on nitrate accumulating denitrifying eukaryotes.
[Mh] Termos MeSH primário: Biofilmes/crescimento & desenvolvimento
Oligoquetos/crescimento & desenvolvimento
Proteobactérias/isolamento & purificação
Rhizaria/isolamento & purificação
Águas Residuais/microbiologia
Águas Residuais/parasitologia
[Mh] Termos MeSH secundário: Animais
Reatores Biológicos/microbiologia
Reatores Biológicos/parasitologia
Nitrificação/fisiologia
Nitrogênio/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Waste Water); N762921K75 (Nitrogen)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170419
[St] Status:MEDLINE
[do] DOI:10.1111/lam.12746


  3 / 57 MEDLINE  
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[PMID]:28338675
[Au] Autor:Biard T; Bigeard E; Audic S; Poulain J; Gutierrez-Rodriguez A; Pesant S; Stemmann L; Not F
[Ad] Endereço:Sorbonne Universités, UPMC Université Paris 06, CNRS, Laboratoire Adaptation et Diversité en Milieu Marin UMR7144, Station Biologique de Roscoff, Roscoff, France.
[Ti] Título:Biogeography and diversity of Collodaria (Radiolaria) in the global ocean.
[So] Source:ISME J;11(6):1331-1344, 2017 Jun.
[Is] ISSN:1751-7370
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Collodaria are heterotrophic marine protists that exist either as large colonies composed of hundreds of cells or as large solitary cells. All described species so far harbour intracellular microalgae as photosymbionts. Although recent environmental diversity surveys based on molecular methods demonstrated their consistently high contribution to planktonic communities and their worldwide occurrence, our understanding of their diversity and biogeography is still very limited. Here we estimated the 18S ribosomal DNA (rDNA) gene copies per collodarian cell for solitary (5770±1960 small subunit (SSU) rDNA copies) and colonial specimens (37 474±17 799 SSU rDNA copies, for each individual cell within a colony) using single-specimen quantitative PCR. We then investigated the environmental diversity of Collodaria within the photic zone through the metabarcoding survey from the Tara Oceans expedition and found that the two collodarian families Collosphaeridae and Sphaerozoidae contributed the most to the collodarian diversity and encompassed mostly cosmopolitan taxa. Although the biogeographical patterns were homogeneous within each biogeochemical biome considered, we observed that coastal biomes were consistently less diverse than oceanic biomes and were dominated by the Sphaerozoidae while the Collosphaeridae were dominant in the open oceans. The significant relationships with six environmental variables suggest that collodarian diversity is influenced by the trophic status of oceanic provinces and increased towards more oligotrophic regions.
[Mh] Termos MeSH primário: Oceanos e Mares
Filogenia
Rhizaria/genética
Rhizaria/fisiologia
[Mh] Termos MeSH secundário: Distribuição Animal
Animais
DNA Ribossômico/genética
Variação Genética
Plâncton
RNA Ribossômico 18S/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Ribosomal); 0 (RNA, Ribosomal, 18S)
[Em] Mês de entrada:1711
[Cu] Atualização por classe:171113
[Lr] Data última revisão:
171113
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170325
[St] Status:MEDLINE
[do] DOI:10.1038/ismej.2017.12


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[PMID]:28333264
[Au] Autor:Krabberød AK; Orr RJS; Bråte J; Kristensen T; Bjørklund KR; Shalchian-Tabrizi K
[Ad] Endereço:Department of Biosciences, Centre for Integrative Microbial Evolution (CIME) and Centre for Epigenetics Development and Evolution (CEDE), University of Oslo, Oslo, Norway.
[Ti] Título:Single Cell Transcriptomics, Mega-Phylogeny, and the Genetic Basis of Morphological Innovations in Rhizaria.
[So] Source:Mol Biol Evol;34(7):1557-1573, 2017 Jul 01.
[Is] ISSN:1537-1719
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The innovation of the eukaryote cytoskeleton enabled phagocytosis, intracellular transport, and cytokinesis, and is largely responsible for the diversity of morphologies among eukaryotes. Still, the relationship between phenotypic innovations in the cytoskeleton and their underlying genotype is poorly understood. To explore the genetic mechanism of morphological evolution of the eukaryotic cytoskeleton, we provide the first single cell transcriptomes from uncultured, free-living unicellular eukaryotes: the polycystine radiolarian Lithomelissa setosa (Nassellaria) and Sticholonche zanclea (Taxopodida). A phylogenomic approach using 255 genes finds Radiolaria and Foraminifera as separate monophyletic groups (together as Retaria), while Cercozoa is shown to be paraphyletic where Endomyxa is sister to Retaria. Analysis of the genetic components of the cytoskeleton and mapping of the evolution of these on the revised phylogeny of Rhizaria reveal lineage-specific gene duplications and neofunctionalization of α and ß tubulin in Retaria, actin in Retaria and Endomyxa, and Arp2/3 complex genes in Chlorarachniophyta. We show how genetic innovations have shaped cytoskeletal structures in Rhizaria, and how single cell transcriptomics can be applied for resolving deep phylogenies and studying gene evolution in uncultured protist species.
[Mh] Termos MeSH primário: Rhizaria/classificação
Rhizaria/genética
[Mh] Termos MeSH secundário: Teorema de Bayes
Evolução Biológica
Eucariotos/genética
Células Eucarióticas
Evolução Molecular
Filogenia
Rhizaria/metabolismo
Alinhamento de Sequência
Análise de Sequência de DNA
Análise de Célula Única/métodos
Transcriptoma/genética
Tubulina (Proteína)/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Tubulin)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171031
[Lr] Data última revisão:
171031
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170324
[St] Status:MEDLINE
[do] DOI:10.1093/molbev/msx075


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[PMID]:28193262
[Au] Autor:Pánek T; Zihala D; Sokol M; Derelle R; Klimes V; Hradilová M; Zadrobílková E; Susko E; Roger AJ; Cepicka I; Eliás M
[Ad] Endereço:Department of Biology and Ecology, Faculty of Science, University of Ostrava, Chittussiho 10, 710 00, Ostrava, Czech Republic.
[Ti] Título:Nuclear genetic codes with a different meaning of the UAG and the UAA codon.
[So] Source:BMC Biol;15(1):8, 2017 Feb 13.
[Is] ISSN:1741-7007
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:BACKGROUND: Departures from the standard genetic code in eukaryotic nuclear genomes are known for only a handful of lineages and only a few genetic code variants seem to exist outside the ciliates, the most creative group in this regard. Most frequent code modifications entail reassignment of the UAG and UAA codons, with evidence for at least 13 independent cases of a coordinated change in the meaning of both codons. However, no change affecting each of the two codons separately has been documented, suggesting the existence of underlying evolutionary or mechanistic constraints. RESULTS: Here, we present the discovery of two new variants of the nuclear genetic code, in which UAG is translated as an amino acid while UAA is kept as a termination codon (along with UGA). The first variant occurs in an organism noticed in a (meta)transcriptome from the heteropteran Lygus hesperus and demonstrated to be a novel insect-dwelling member of Rhizaria (specifically Sainouroidea). This first documented case of a rhizarian with a non-canonical genetic code employs UAG to encode leucine and represents an unprecedented change among nuclear codon reassignments. The second code variant was found in the recently described anaerobic flagellate Iotanema spirale (Metamonada: Fornicata). Analyses of transcriptomic data revealed that I. spirale uses UAG to encode glutamine, similarly to the most common variant of a non-canonical code known from several unrelated eukaryotic groups, including hexamitin diplomonads (also a lineage of fornicates). However, in these organisms, UAA also encodes glutamine, whereas it is the primary termination codon in I. spirale. Along with phylogenetic evidence for distant relationship of I. spirale and hexamitins, this indicates two independent genetic code changes in fornicates. CONCLUSIONS: Our study documents, for the first time, that evolutionary changes of the meaning of UAG and UAA codons in nuclear genomes can be decoupled and that the interpretation of the two codons by the cytoplasmic translation apparatus is mechanistically separable. The latter conclusion has interesting implications for possibilities of genetic code engineering in eukaryotes. We also present a newly developed generally applicable phylogeny-informed method for inferring the meaning of reassigned codons.
[Mh] Termos MeSH primário: Núcleo Celular/genética
Códon/genética
Código Genético
[Mh] Termos MeSH secundário: Animais
Cilióforos/genética
Evolução Molecular
Glutamina/genética
Insetos/parasitologia
Leucina/genética
Fases de Leitura Aberta/genética
Filogenia
Rhizaria/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Codon); 0RH81L854J (Glutamine); GMW67QNF9C (Leucine)
[Em] Mês de entrada:1710
[Cu] Atualização por classe:171116
[Lr] Data última revisão:
171116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170215
[St] Status:MEDLINE
[do] DOI:10.1186/s12915-017-0353-y


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[PMID]:27796418
[Au] Autor:Miyaoka Y; Hatamoto M; Yamaguchi T; Syutsubo K
[Ad] Endereço:Department of Civil and Environmental Engineering, Nagaoka University of Technology, 1603-1 Kamitomioka, Nagaoka, Niigata, 940-2188, Japan.
[Ti] Título:Eukaryotic Community Shift in Response to Organic Loading Rate of an Aerobic Trickling Filter (Down-Flow Hanging Sponge Reactor) Treating Domestic Sewage.
[So] Source:Microb Ecol;73(4):801-814, 2017 May.
[Is] ISSN:1432-184X
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this study, changes in eukaryotic community structure and water quality were investigated in an aerobic trickling filter (down-flow hanging sponge, DHS) treating domestic sewage under different organic loading rates (OLRs). The OLR clearly influenced both sponge pore water quality and relative flagellates and ciliates (free-swimming, carnivorous, crawling, and stalked protozoa) abundances in the retained sludge. Immediately after the OLR was increased from 1.05 to 1.97 kg chemical oxygen demand (COD) m day , COD and NH -N treatment efficiencies both deteriorated, and relative flagellates and ciliates abundances then increased from 2-8 % to 51-65 % total cells in the middle-bottom part of the DHS reactor. In a continuous operation at a stable OLR (2.01 kg COD m day ), effluent water quality improved, and relative flagellates and ciliates abundances decreased to 15-46 % total cells in the middle-bottom part of the DHS reactor. This result may indicate that flagellates and ciliates preferentially graze on dispersed bacteria, thus, stabilizing effluent water quality. Additionally, to investigate eukaryotic community structure, clone libraries based on the 18S ribosomal ribonucleic acid (rRNA) gene of the retained sludge were constructed. The predominant group was Nucletmycea phylotypes, representing approximately 29-56 % total clones. Furthermore, a large proportion of the clones had <97 % sequence identity in the NCBI database. This result indicates that phylogenetically unknown eukaryotes were present in the DHS reactor. These results provide insights into eukaryotic community shift in the DHS reactor treating domestic sewage.
[Mh] Termos MeSH primário: Aerobiose
Reatores Biológicos/microbiologia
Reatores Biológicos/parasitologia
Eucariotos/classificação
Esgotos/microbiologia
Esgotos/parasitologia
[Mh] Termos MeSH secundário: Alveolados/classificação
Animais
Bactérias/crescimento & desenvolvimento
Bactérias/metabolismo
Contagem de Células
Eucariotos/genética
Eucariotos/crescimento & desenvolvimento
Eucariotos/metabolismo
Poríferos
RNA Ribossômico 18S/genética
Rhizaria/classificação
Eliminação de Resíduos Líquidos
Purificação da Água
Qualidade da Água
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (RNA, Ribosomal, 18S); 0 (Sewage)
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170922
[Lr] Data última revisão:
170922
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161101
[St] Status:MEDLINE
[do] DOI:10.1007/s00248-016-0871-0


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[PMID]:27687286
[Au] Autor:Xu D; Jiao N; Ren R; Warren A
[Ad] Endereço:State Key Laboratory of Marine Environmental Science, Xiamen University, Xiamen, 361102, China.
[Ti] Título:Distribution and Diversity of Microbial Eukaryotes in Bathypelagic Waters of the South China Sea.
[So] Source:J Eukaryot Microbiol;64(3):370-382, 2017 May.
[Is] ISSN:1550-7408
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Little is known about the biodiversity of microbial eukaryotes in the South China Sea, especially in waters at bathyal depths. Here, we employed SSU rDNA gene sequencing to reveal the diversity and community structure across depth and distance gradients in the South China Sea. Vertically, the highest alpha diversity was found at 75-m depth. The communities of microbial eukaryotes were clustered into shallow-, middle-, and deep-water groups according to the depth from which they were collected, indicating a depth-related diversity and distribution pattern. Rhizaria sequences dominated the microeukaryote community and occurred in all samples except those from less than 50-m deep, being most abundant near the sea floor where they contributed ca. 64-97% and 40-74% of the total sequences and OTUs recovered, respectively. A large portion of rhizarian OTUs has neither a nearest named neighbor nor a nearest neighbor in the GenBank database which indicated the presence of new phylotypes in the South China Sea. Given their overwhelming abundance and richness, further phylogenetic analysis of rhizarians were performed and three new genetic clusters were revealed containing sequences retrieved from the deep waters of the South China Sea. Our results shed light on the diversity and community structure of microbial eukaryotes in this not yet fully explored area.
[Mh] Termos MeSH primário: Biodiversidade
Eucariotos/classificação
Filogenia
[Mh] Termos MeSH secundário: China
Classificação
DNA de Protozoário
DNA Ribossômico/genética
DNA Ribossômico/isolamento & purificação
Eucariotos/genética
Família Multigênica
Rhizaria/classificação
Rhizaria/genética
Água do Mar/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Protozoan); 0 (DNA, Ribosomal)
[Em] Mês de entrada:1708
[Cu] Atualização por classe:170828
[Lr] Data última revisão:
170828
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161001
[St] Status:MEDLINE
[do] DOI:10.1111/jeu.12372


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[PMID]:27677681
[Au] Autor:Piredda R; Tomasino MP; D'Erchia AM; Manzari C; Pesole G; Montresor M; Kooistra WH; Sarno D; Zingone A
[Ad] Endereço:Department of Integrative Marine Ecology, Stazione Zoologica Anton Dohrn, Villa Comunale, Naples, Italy roberta.piredda@szn.it.
[Ti] Título:Diversity and temporal patterns of planktonic protist assemblages at a Mediterranean Long Term Ecological Research site.
[So] Source:FEMS Microbiol Ecol;93(1), 2017 Jan.
[Is] ISSN:1574-6941
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:We tracked temporal changes in protist diversity at the Long Term Ecological Research (LTER) station MareChiara in the Gulf of Naples (Mediterranean Sea) on eight dates in 2011 using a metabarcoding approach. Illumina analysis of the V4 and V9 fragments of the 18S rDNA produced 869 522 and 1 410 071 sequences resulting in 6517 and 6519 OTUs, respectively. Marked compositional variations were recorded across the year, with less than 2% of OTUs shared among all samples and similar patterns for the two marker tags. Alveolata, Stramenopiles and Rhizaria were the most represented groups. A comparison with light microscopy data indicated an over-representation of Dinophyta in the sequence dataset, whereas Bacillariophyta showed comparable taxonomic patterns between sequence and light microscopy data. Shannon diversity values were stable from February to September, increasing thereafter with a peak in December. Community variance was mainly explained by seasonality (as temperature), trophic status (as chlorophyll a), and influence of coastal waters (as salinity). Overall, the background knowledge of the system provided a sound context for the result interpretation, showing that LTER sites provide an ideal setting for high-throughput sequencing (HTS) metabarcoding characterisation of protist assemblages and their relationships with environmental variations.
[Mh] Termos MeSH primário: Alveolados/classificação
Biodiversidade
Plâncton/classificação
Rhizaria/classificação
Estramenópilas/classificação
[Mh] Termos MeSH secundário: Alveolados/genética
Alveolados/isolamento & purificação
Clorofila/metabolismo
Ecologia
Mar Mediterrâneo
Filogenia
Plâncton/genética
Plâncton/isolamento & purificação
Plâncton/metabolismo
Rhizaria/genética
Rhizaria/isolamento & purificação
Estramenópilas/genética
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
1406-65-1 (Chlorophyll); YF5Q9EJC8Y (chlorophyll a)
[Em] Mês de entrada:1707
[Cu] Atualização por classe:170726
[Lr] Data última revisão:
170726
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160929
[St] Status:MEDLINE


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[PMID]:27194208
[Au] Autor:Remmas N; Melidis P; Paschos G; Statiris E; Ntougias S
[Ad] Endereço:a Laboratory of Wastewater Management and Treatment Technologies, Department of Environmental Engineering , Democritus University of Thrace , Xanthi , Greece.
[Ti] Título:Protozoan indicators and extracellular polymeric substances alterations in an intermittently aerated membrane bioreactor treating mature landfill leachate.
[So] Source:Environ Technol;38(1):53-64, 2017 Jan.
[Is] ISSN:0959-3330
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A membrane bioreactor was operated under intermittent aeration and various organic loading rates (OLR: 0.070, 0.159 and 0.291 g COD L d ) to remove carbon and nitrogen from mature landfill leachate, where external carbon source (glycerol) addition resulted in effective nitrate removal. A relative increase in soluble microbial product (SMP) over extracellular polymeric substances (EPS) was observed at the highest OLR and glycerol addition, whereas no membrane biofouling occurred. SMP (proteins and carbohydrates) and carbohydrate EPS correlated positively and negatively, respectively, with suspended solids and transmembrane pressure (TMP). Moreover, proteinous SMP significantly correlated with carbon and nitrogen load. Principal component analysis also revealed the influence of leachate organic and nitrogen content on biomass production, TMP and sessile ciliate densities. Although filamentous index (FI) was sustained at high levels (3-4), with Haliscomenobacter hydrossis being the main filamentous bacterium identified, no bulking phenomena occurred. High glycerol addition resulted in a rapid increase in sessile ciliate population. Increased Epistylis and Vorticella microstoma population was detected by microscopic examination during high glycerol addition, while a remarkable Rhogostoma population (supergroup Rhizaria) was identified by molecular techniques. The contribution of Rhizaria in nitrogen processes may lead to the dominance of Rhogostoma during landfill leachate treatment.
[Mh] Termos MeSH primário: Biopolímeros/análise
Reatores Biológicos
Cilióforos/isolamento & purificação
Rhizaria/isolamento & purificação
Poluentes Químicos da Água/análise
[Mh] Termos MeSH secundário: Bacteroidetes/efeitos dos fármacos
Bacteroidetes/isolamento & purificação
Biopolímeros/metabolismo
Cilióforos/efeitos dos fármacos
Cilióforos/genética
DNA de Protozoário/genética
Glicerol/farmacologia
Membranas Artificiais
Filogenia
Densidade Demográfica
RNA Ribossômico 18S/genética
Rhizaria/efeitos dos fármacos
Rhizaria/genética
Poluentes Químicos da Água/metabolismo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Biopolymers); 0 (DNA, Protozoan); 0 (Membranes, Artificial); 0 (RNA, Ribosomal, 18S); 0 (Water Pollutants, Chemical); PDC6A3C0OX (Glycerol)
[Em] Mês de entrada:1702
[Cu] Atualização por classe:170206
[Lr] Data última revisão:
170206
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:160520
[St] Status:MEDLINE


  10 / 57 MEDLINE  
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[PMID]:27748958
[Au] Autor:Voje KL
[Ad] Endereço:Centre for Ecological and Evolutionary Synthesis (CEES), Department of Biosciences, University of Oslo, Oslo, Norway.
[Ti] Título:Tempo does not correlate with mode in the fossil record.
[So] Source:Evolution;70(12):2678-2689, 2016 Dec.
[Is] ISSN:1558-5646
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The dominating view of evolution based on the fossil record is that established species remain more or less unaltered during their existence. Substantial evolution is on the other hand routinely reported for contemporary populations, and most quantitative traits show high potential for evolution. These contrasting observations on long- and short-time scales are often referred to as the paradox of stasis, which rests on the fundamental assumption that periods of morphological stasis in the fossil record represent minimal evolutionary change. Investigating 450 fossil time series, I demonstrate that the nonaccumulating morphological fluctuations during stasis travel similar distances in morphospace compared to lineages showing directional change. Hence, lineages showing stasis are commonly undergoing considerable amounts of evolution, but this evolution does not accumulate to produce large net evolutionary changes over time. Rates of evolutionary change across modes in the fossil record may be more homogenous than previously assumed and advocated, supporting the claim that substantial evolution is not exclusively or causally linked to the process of speciation. Instead of exemplifying minimal evolution, stasis likely represents information on the dynamics of the adaptive landscape on macroevolutionary time scales, including the persistence of adaptive zones and ecological niches over millions of years.
[Mh] Termos MeSH primário: Evolução Biológica
Fósseis/anatomia & histologia
Fenótipo
[Mh] Termos MeSH secundário: Animais
Invertebrados/anatomia & histologia
Rhizaria/ultraestrutura
Strepsirhini/anatomia & histologia
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1709
[Cu] Atualização por classe:170920
[Lr] Data última revisão:
170920
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:161018
[St] Status:MEDLINE
[do] DOI:10.1111/evo.13090



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