Base de dados : MEDLINE
Pesquisa : Z01.756.700 [Categoria DeCS]
Referências encontradas : 3529 [refinar]
Mostrando: 1 .. 10   no formato [Detalhado]

página 1 de 353 ir para página                         

  1 / 3529 MEDLINE  
              next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29458542
[Au] Autor:Sun QL; Yu C; Luan ZD; Lian C; Hu YH; Sun L
[Ad] Endereço:1​Key Laboratory of Experimental Marine Biology, Institute of Oceanology, Chinese Academy of Sciences, Qingdao, PR China.
[Ti] Título:Description of Bacillus kexueae sp. nov. and Bacillus manusensis sp. nov., isolated from hydrothermal sediments.
[So] Source:Int J Syst Evol Microbiol;68(3):829-834, 2018 Mar.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Two Gram-staining-positive, strictly aerobic bacilli, designated as strains Ma50-5 and Ma50-6 , were isolated from the hydrothermal sediments of Manus Basin in the western Pacific Ocean. Based on 16S rRNA gene sequence, strains Ma50-5 and Ma50-6 were most closely related to Bacillus alveayuensis (97.0 and 97.2 % identity, respectively). The 16S rRNA gene sequence identity between strains Ma50-5 and Ma50-6 was 97.4 %. The identities between strains Ma50-5 and Ma50-6 and other closely related organisms were below 97.0 %. The G+C contents of the genomic DNA of strains Ma50-5 and Ma50-6 were 43.4 and 47.6 mol%, respectively. The major fatty acids (>10 %) of both strains were iso-C15 : 0 and iso-C17 : 0. The predominant isoprenoid quinone detected in both strains was menaquinone-7. Phylogenetic, physiological, biochemical and morphological analyses suggested that strains Ma50-5 and Ma50-6 represent two novel species of the genus Bacillus, for which the names Bacillus kexueae sp. nov. (type strain Ma50-5 =KCTC 33881 =CCTCC AB 2017020 ) and Bacillus manusensis sp. nov. (type strain Ma50-6 =KCTC 33882 =CCTCC AB 2017019 ), respectively, are proposed.
[Mh] Termos MeSH primário: Bacillus/classificação
Sedimentos Geológicos/microbiologia
Fontes Hidrotermais/microbiologia
Filogenia
[Mh] Termos MeSH secundário: Bacillus/genética
Bacillus/isolamento & purificação
Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Hibridização de Ácido Nucleico
Oceano Pacífico
RNA Ribossômico 16S/genética
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 8427BML8NY (vitamin MK 7)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002594


  2 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29458485
[Au] Autor:Nedashkovskaya OI; Kim SG; Stenkova AM; Kukhlevskiy AD; Zhukova NV; Mikhailov VV
[Ad] Endereço:1​G.B. Elyakov Pacific Institute of Bioorganic Chemistry of the Far-Eastern Branch of the Russian Academy of Sciences, Prospekt 100 Let Vladivostoku 159, 690022, Vladivostok, Russia.
[Ti] Título:Aquimarina algiphila sp. nov., a chitin degrading bacterium isolated from the red alga Tichocarpus crinitus.
[So] Source:Int J Syst Evol Microbiol;68(3):892-898, 2018 Mar.
[Is] ISSN:1466-5034
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:A strictly aerobic, Gram-stain-negative, rod-shaped, motile by gliding and yellow-orange pigmented flavobacterium, designated strain 9Alg 151 , was isolated from the Pacific red alga Tichocarpus crinitus. Phylogenetic analysis based on 16S rRNA gene sequences showed that the novel strain fell into the genus Aquimarina of the family Flavobacteriaceae with a 16S rRNA gene sequence similarity range of 94.2-98.2 % to the recognized species of the genus. Strain 9Alg 151 grew in the presence of 0.5-5 % NaCl and at 5-34 °C, and hydrolysed aesculin, agar, gelatin, starch, Tween 40, DNA and chitin. The predominant fatty acids were iso-C17 : 0 3-OH, iso-C15 : 0, iso-C15 : 1 G, iso-C15 : 0 3-OH, iso-C16 : 0, iso-C17 : 1ω8c and summed feature 3. The polar lipid profile comprised phosphatidylethanolamine, three unidentified aminolipids and three unidentified lipids. The major respiratory quinone was MK-6. The genomic DNA G+C content was 32.6 mol%. On the basis of 16S rRNA gene sequence data, and chemotaxonomic and phenotypic characteristics, strain 9Alg 151 represents a novel species of the genus Aquimarina, for which the name Aquimarina algiphila sp. nov. is proposed. The type strain is 9Alg 151 (=KCTC 23622 =KMM 6462 ).
[Mh] Termos MeSH primário: Flavobacteriaceae/classificação
Filogenia
Rodófitas/microbiologia
[Mh] Termos MeSH secundário: Técnicas de Tipagem Bacteriana
Composição de Bases
DNA Bacteriano/genética
Ácidos Graxos/química
Flavobacteriaceae/genética
Flavobacteriaceae/isolamento & purificação
Oceano Pacífico
Fosfatidiletanolaminas/química
Pigmentação
RNA Ribossômico 16S/genética
Federação Russa
Análise de Sequência de DNA
Vitamina K 2/análogos & derivados
Vitamina K 2/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (DNA, Bacterial); 0 (Fatty Acids); 0 (Phosphatidylethanolamines); 0 (RNA, Ribosomal, 16S); 11032-49-8 (Vitamin K 2); 39382-08-6 (phosphatidylethanolamine); 71ANL51TLA (menaquinone 6)
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180308
[Lr] Data última revisão:
180308
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180221
[St] Status:MEDLINE
[do] DOI:10.1099/ijsem.0.002606


  3 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29206219
[Au] Autor:Heenan A; Williams ID; Acoba T; DesRochers A; Kosaki RK; Kanemura T; Nadon MO; Brainard RE
[Ad] Endereço:Joint Institute for Marine and Atmospheric Research, University of Hawaii, Manoa, Honolulu, Hawaii 96822, USA.
[Ti] Título:Long-term monitoring of coral reef fish assemblages in the Western central pacific.
[So] Source:Sci Data;4:170176, 2017 12 05.
[Is] ISSN:2052-4463
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Throughout the tropics, coral reef ecosystems, which are critically important to people, have been greatly altered by humans. Differentiating human impacts from natural drivers of ecosystem state is essential to effective management. Here we present a dataset from a large-scale monitoring program that surveys coral reef fish assemblages and habitats encompassing the bulk of the US-affiliated tropical Pacific, and spanning wide gradients in both natural drivers and human impact. Currently, this includes >5,500 surveys from 39 islands and atolls in Hawaii (including the main and Northwestern Hawaiian Islands) and affiliated geo-political regions of American Samoa, the Commonwealth of the Northern Mariana Islands, Guam, and the Pacific Remote Islands Areas. The dataset spans 2010-2017, during which time, each region was visited at least every three years, and ~500-1,000 surveys performed annually. This standardised dataset is a powerful resource that can be used to understand how human, environmental and oceanographic conditions influence coral reef fish community structure and function, providing a basis for research to support effective management outcomes.
[Mh] Termos MeSH primário: Recifes de Corais
Peixes
[Mh] Termos MeSH secundário: Animais
Ecossistema
Monitoramento Ambiental
Oceano Pacífico
[Pt] Tipo de publicação:DATASET; JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180305
[Lr] Data última revisão:
180305
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171206
[St] Status:MEDLINE
[do] DOI:10.1038/sdata.2017.176


  4 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29488024
[Au] Autor:Hall S; Thatje S
[Ad] Endereço:Ocean and Earth Science, National Oceanography Centre, University of Southampton, European Way, Southampton, SO14 3ZH, UK.
[Ti] Título:Evolution through cold and deep waters: the molecular phylogeny of the Lithodidae (Crustacea: Decapoda).
[So] Source:Naturwissenschaften;105(3-4):19, 2018 Feb 27.
[Is] ISSN:1432-1904
[Cp] País de publicação:Germany
[La] Idioma:eng
[Ab] Resumo:The objectives of this work are to use gene sequence data to assess the hypothesis that the Lithodinae arose from ancestors with uncalcified abdomens in shallow waters of the North-East Pacific, investigate the monophyly and interrelationships of genera within the Lithodinae and to estimate the scale and minimum number of biogeographic transitions from the shallow environment to the deep sea and vice versa. To do this, phylogenetic analysis from three mitochondrial and three nuclear markers was conducted using minimum evolution, maximum likelihood and Bayesian methods. The Lithodinae as defined to include North Pacific genus Cryptolithodes may be paraphyletic, with the Hapalogastrinae and Cryptolithodes as sister taxa. This implies that the soft-bodied abdomen of the Hapalogastrinae might not be plesiomorphic for the Lithodidae. Paralomis, Lopholithodes, Phyllolithodes, Lithodes and Neolithodes share a common ancestor, from which the North Pacific Hapalogastrinae did not descend. Lithodid ancestors are likely to have had a north Pacific, shallow water distribution and to have had planktotrophic larvae. North Pacific genus Paralithodes is paraphyletic; P. brevipes is the most basal member of the genus (as sampled) while P. camtschaticus and P. platypus are more closely related to the genera Lithodes and Neolithodes. Genera Lithodes, Neolithodes and Paralomis (as sampled) are monophyletic if Glyptolithodes is included within Paralomis. Lopholithodes is closely related to, but not included within, the Paralomis genus. Paralomis is divided into at least two major lineages: one containing South Atlantic, West African, and Indian Ocean species, and the other containing Pacific and South American species. Several species of Paralomis do not resolve consistently with any other groups sampled, implying a complex and possibly rapid global evolution early in the history of the genus. Relationships within the Lithodes genus vary between analytical methods, suggesting that conclusions may not be stable. Consistently, however, Indian Ocean and Pacific forms-L. murrayi, L. longispina and L. nintokuae form a group separated from Atlantic species such as L. santolla, L. confundens, L. maja and L. ferox.
[Mh] Termos MeSH primário: Decápodes (Crustáceos)/classificação
Decápodes (Crustáceos)/genética
Meio Ambiente
Filogenia
[Mh] Termos MeSH secundário: Animais
Temperatura Baixa
Genes Mitocondriais/genética
Oceano Pacífico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1803
[Cu] Atualização por classe:180304
[Lr] Data última revisão:
180304
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180301
[St] Status:MEDLINE
[do] DOI:10.1007/s00114-018-1544-2


  5 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29385193
[Au] Autor:Mizuno M; Sasaki T; Kobayashi M; Haneda T; Masubuchi T
[Ad] Endereço:Graduate School of Bioindustry, Tokyo University of Agriculture, Abashiri, Hokkaido, Japan.
[Ti] Título:Mitochondrial DNA reveals secondary contact in Japanese harbour seals, the southernmost population in the western Pacific.
[So] Source:PLoS One;13(1):e0191329, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:In this study, we used relatively large number of samples (n = 178) and control region of mtDNA (454bp) to clearify the divergence history of Japanese harbour seals (Phoca vitulina stejnegeri) and phylogenetic relationship between the seals in Japan and other countries. Our results suggested that Japanese harbour seals possibly consisted of more than two lineages and secondary contact of populations after a long isolation. Furthermore, one of the lineage was made only by Japanese harbour seals (Group P1). The proportion of Group P1 was the highest at the South West and gradually decreased towards the North East of Hokkaido, Japan. On the other hand, the haplotypes do not belonged to Group P1 showed close relationship to the seals in the North Pacific. Based on the fossil record of harbour seal in Japan and the range of sea ice during the Last Glacial Maximum (LGM), Group P1 might have entered Japan before the LGM and became isolated due to the geographical boundary, and gradually extended its range from the South West towards the North East of Hokkaido after the disappearance of the sea ice, while the seals which are not in Group P1 immigrated into Japan from the North Pacific.
[Mh] Termos MeSH primário: DNA Mitocondrial/genética
Oceano Pacífico
Phoca/classificação
Phoca/genética
[Mh] Termos MeSH secundário: Animais
Filogenia
[Pt] Tipo de publicação:JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180226
[Lr] Data última revisão:
180226
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180201
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0191329


  6 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29407641
[Au] Autor:Kaizer J; Aoyama M; Kumamoto Y; Molnár M; Palcsu L; Povinec PP
[Ad] Endereço:Faculty of Mathematics, Physics and Informatics, Comenius University, 84248 Bratislava, Slovakia. Electronic address: kaizer@fmph.uniba.sk.
[Ti] Título:Tritium and radiocarbon in the western North Pacific waters: post-Fukushima situation.
[So] Source:J Environ Radioact;184-185:83-94, 2018 Apr.
[Is] ISSN:1879-1700
[Cp] País de publicação:England
[La] Idioma:eng
[Ab] Resumo:Impact of the Fukushima Dai-ichi Nuclear Power Plant (FNPP1) accident on tritium ( H) and radiocarbon ( C) levels in the water column of the western North Pacific Ocean in winter 2012 is evaluated and compared with radiocesium ( Cs) data collected for the same region. Tritium concentrations in surface seawater, varying between 0.4 and 2.0 TU (47.2-236 Bq m ), follow the Fukushima radiocesium trend, however, some differences in the vertical profiles were observed, namely in depths of 50-400 m. No correlation was visible in the case of C, whose surface Δ C levels raised from negative values (about -40‰) in the northern part of transect, to positive values (∼68‰) near the equator. Homogenously mixed C levels in the subsurface layers were observed at all stations. Sixteen surface (from 30 in total) and 6 water profile (from 7) stations were affected by the Fukushima tritium. Surface and vertical profile data together with the calculated water column inventories indicate that the total amount of the FNPP1-derived tritium deposited to the western North Pacific Ocean was 0.7 ±â€¯0.3 PBq. No clear impact of the Fukushima accident on C levels in the western North Pacific was observed.
[Mh] Termos MeSH primário: Radioisótopos de Césio/análise
Acidente Nuclear de Fukushima
Monitoramento de Radiação
Trítio/análise
Poluentes Radioativos da Água/análise
[Mh] Termos MeSH secundário: Oceano Pacífico
Água do Mar/química
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
0 (Cesium Radioisotopes); 0 (Water Pollutants, Radioactive); 10028-17-8 (Tritium)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180220
[Lr] Data última revisão:
180220
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180207
[St] Status:MEDLINE


  7 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29320518
[Au] Autor:Johnson BM; Kemp BM; Thorgaard GH
[Ad] Endereço:School of Biological Sciences, Washington State University, Pullman, Washington, United States of America.
[Ti] Título:Increased mitochondrial DNA diversity in ancient Columbia River basin Chinook salmon Oncorhynchus tshawytscha.
[So] Source:PLoS One;13(1):e0190059, 2018.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The Columbia River and its tributaries provide essential spawning and rearing habitat for many salmonid species, including Chinook salmon (Oncorhynchus tshawytscha). Chinook salmon were historically abundant throughout the basin and Native Americans in the region relied heavily on these fish for thousands of years. Following the arrival of Europeans in the 1800s, salmon in the basin experienced broad declines linked to overfishing, water diversion projects, habitat destruction, connectivity reduction, introgression with hatchery-origin fish, and hydropower development. Despite historical abundance, many native salmonids are now at risk of extinction. Research and management related to Chinook salmon is usually explored under what are termed "the four H's": habitat, harvest, hatcheries, and hydropower; here we explore a fifth H, history. Patterns of prehistoric and contemporary mitochondrial DNA variation from Chinook salmon were analyzed to characterize and compare population genetic diversity prior to recent alterations and, thus, elucidate a deeper history for this species. A total of 346 ancient and 366 contemporary samples were processed during this study. Species was determined for 130 of the ancient samples and control region haplotypes of 84 of these were sequenced. Diversity estimates from these 84 ancient Chinook salmon were compared to 379 contemporary samples. Our analysis provides the first direct measure of reduced genetic diversity for Chinook salmon from the ancient to the contemporary period, as measured both in direct loss of mitochondrial haplotypes and reductions in haplotype and nucleotide diversity. However, these losses do not appear equal across the basin, with higher losses of diversity in the mid-Columbia than in the Snake subbasin. The results are unexpected, as the two groups were predicted to share a common history as parts of the larger Columbia River Basin, and instead indicate that Chinook salmon in these subbasins may have divergent demographic histories.
[Mh] Termos MeSH primário: DNA Mitocondrial/análise
Evolução Molecular
Variação Genética
Salmão/genética
[Mh] Termos MeSH secundário: Migração Animal
Animais
Pesqueiros/história
Haplótipos
História do Século XXI
História Antiga
Atividades Humanas
Modelos Genéticos
Oceano Pacífico
Filogenia
Dinâmica Populacional
Centrais Elétricas
Rios
[Pt] Tipo de publicação:COMPARATIVE STUDY; HISTORICAL ARTICLE; JOURNAL ARTICLE; RESEARCH SUPPORT, NON-U.S. GOV'T
[Nm] Nome de substância:
0 (DNA, Mitochondrial)
[Em] Mês de entrada:1802
[Cu] Atualização por classe:180214
[Lr] Data última revisão:
180214
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:180111
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0190059


  8 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:29236731
[Au] Autor:Morton A; Routledge R; Hrushowy S; Kibenge M; Kibenge F
[Ad] Endereço:Raincoast Research Society, Sointula, British Columbia, Canada.
[Ti] Título:The effect of exposure to farmed salmon on piscine orthoreovirus infection and fitness in wild Pacific salmon in British Columbia, Canada.
[So] Source:PLoS One;12(12):e0188793, 2017.
[Is] ISSN:1932-6203
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:The disease Heart and Skeletal Muscle Inflammation (HSMI) is causing substantial economic losses to the Norwegian salmon farming industry where the causative agent, piscine orthoreovirus (PRV), is reportedly spreading from farmed to wild Atlantic salmon (Salmo salar) with as yet undetermined impacts. To assess if PRV infection is epidemiologically linked between wild and farmed salmon in the eastern Pacific, wild Pacific salmon (Oncorhynchus sp.) from regions designated as high or low exposure to salmon farms and farmed Atlantic salmon reared in British Columbia (BC) were tested for PRV. The proportion of PRV infection in wild fish was related to exposure to salmon farms (p = 0.0097). PRV was detected in: 95% of farmed Atlantic salmon, 37-45% of wild salmon from regions highly exposed to salmon farms and 5% of wild salmon from the regions furthest from salmon farms. The proportion of PRV infection was also significantly lower (p = 0.0008) where wild salmon had been challenged by an arduous return migration into high-elevation spawning habitat. Inter-annual PRV infection declined in both wild and farmed salmon from 2012-2013 (p ≤ 0.002). These results suggest that PRV transfer is occurring from farmed Atlantic salmon to wild Pacific salmon, that infection in farmed salmon may be influencing infection rates in wild salmon, and that this may pose a risk of reduced fitness in wild salmon impacting their survival and reproduction.
[Mh] Termos MeSH primário: Aquicultura
Orthoreovirus/patogenicidade
Salmão/virologia
[Mh] Termos MeSH secundário: Animais
Colúmbia Britânica
Oceano Pacífico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180116
[Lr] Data última revisão:
180116
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171214
[St] Status:MEDLINE
[do] DOI:10.1371/journal.pone.0188793


  9 / 3529 MEDLINE  
              first record previous record next record last record
seleciona
para imprimir
Fotocópia
[PMID]:29210234
[Au] Autor:Santora JA; Schroeder ID; Field JC; Wells BK; Sydeman WJ
[Ti] Título:Spatio-temporal dynamics of ocean conditions and forage taxa reveal regional structuring of seabird­prey relationships.
[So] Source:Ecol Appl;24(7):1730-47, 2014.
[Is] ISSN:1051-0761
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Studies of predator­prey demographic responses and the physical drivers of such relationships are rare, yet essential for predicting future changes in the structure and dynamics of marine ecosystems. Here, we hypothesize that predator­prey relationships vary spatially in association with underlying physical ocean conditions, leading to observable changes in demographic rates, such as reproduction. To test this hypothesis, we quantified spatio-temporal variability in hydrographic conditions, krill, and forage fish to model predator (seabird) demographic responses over 18 years (1990­2007). We used principal component analysis and spatial correlation maps to assess coherence among ocean conditions, krill, and forage fish, and generalized additive models to quantify interannual variability in seabird breeding success relative to prey abundance. The first principal component of four hydrographic measurements yielded an index that partitioned "warm/weak upwelling" and "cool/strong upwelling" years. Partitioning of krill and forage fish time series among shelf and oceanic regions yielded spatially explicit indicators of prey availability. Krill abundance within the oceanic region was remarkably consistent between years, whereas krill over the shelf showed marked interannual fluctuations in relation to ocean conditions. Anchovy abundance varied on the shelf, and was greater in years of strong stratification, weak upwelling and warmer temperatures. Spatio-temporal variability of juvenile forage fish co-varied strongly with each other and with krill, but was weakly correlated with hydrographic conditions. Demographic responses between seabirds and prey availability revealed spatially variable associations indicative of the dynamic nature of "predator­habitat" relationships. Quantification of spatially explicit demographic responses, and their variability through time, demonstrate the possibility of delineating specific critical areas where the implementation of protective measures could maintain functions and productivity of central place foraging predators.
[Mh] Termos MeSH primário: Charadriiformes/fisiologia
Euphausiacea/fisiologia
Peixes/fisiologia
Comportamento Predatório/fisiologia
[Mh] Termos MeSH secundário: Animais
Oceano Pacífico
Dinâmica Populacional
Salinidade
Água do Mar
Temperatura Ambiente
Fatores de Tempo
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Em] Mês de entrada:1801
[Cu] Atualização por classe:180108
[Lr] Data última revisão:
180108
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:171207
[St] Status:MEDLINE


  10 / 3529 MEDLINE  
              first record previous record
seleciona
para imprimir
Fotocópia
Texto completo
[PMID]:28462990
[Au] Autor:Kim H; Lee K; Lim DI; Nam SI; Kim TW; Yang JT; Ko YH; Shin KH; Lee E
[Ad] Endereço:Division of Environmental Science and Engineering, Pohang University of Science and Technology , Pohang 37673, Korea.
[Ti] Título:Widespread Anthropogenic Nitrogen in Northwestern Pacific Ocean Sediment.
[So] Source:Environ Sci Technol;51(11):6044-6052, 2017 Jun 06.
[Is] ISSN:1520-5851
[Cp] País de publicação:United States
[La] Idioma:eng
[Ab] Resumo:Sediment samples from the East China and Yellow seas collected adjacent to continental China were found to have lower δ N values (expressed as δ N = [ N: N / N: N - 1] × 1000‰; the sediment N: N ratio relative to the air nitrogen N: N ratio). In contrast, the Arctic sediments from the Chukchi Sea, the sampling region furthest from China, showed higher δ N values (2-3‰ higher than those representing the East China and the Yellow sea sediments). Across the sites sampled, the levels of sediment δ N increased with increasing distance from China, which is broadly consistent with the decreasing influence of anthropogenic nitrogen (N ) resulting from fossil fuel combustion and fertilizer use. We concluded that, of several processes, the input of N appears to be emerging as a new driver of change in the sediment δ N value in marginal seas adjacent to China. The present results indicate that the effect of N has extended beyond the ocean water column into the deep sedimentary environment, presumably via biological assimilation of N followed by deposition. Further, the findings indicate that N is taking over from the conventional paradigm of nitrate flux from nitrate-rich deep water as the primary driver of biological export production in this region of the Pacific Ocean.
[Mh] Termos MeSH primário: Monitoramento Ambiental
Sedimentos Geológicos
Nitrogênio
[Mh] Termos MeSH secundário: Regiões Árticas
China
Oceanos e Mares
Oceano Pacífico
[Pt] Tipo de publicação:JOURNAL ARTICLE
[Nm] Nome de substância:
N762921K75 (Nitrogen)
[Em] Mês de entrada:1712
[Cu] Atualização por classe:171211
[Lr] Data última revisão:
171211
[Sb] Subgrupo de revista:IM
[Da] Data de entrada para processamento:170503
[St] Status:MEDLINE
[do] DOI:10.1021/acs.est.6b05316



página 1 de 353 ir para página                         
   


Refinar a pesquisa
  Base de dados : MEDLINE Formulário avançado   

    Pesquisar no campo  
1  
2
3
 
           



Search engine: iAH v2.6 powered by WWWISIS

BIREME/OPAS/OMS - Centro Latino-Americano e do Caribe de Informação em Ciências da Saúde