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| Registros recuperados: 900 | |
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| Swapnil G. Sanmukh; Waman N. Paunikar; Sandhya Swaminathan; Satish K. Lokhande. |
| The interconversion of carbon in organic, inorganic and refractory carbon is still beyond the grasp of present environmentalists. The bacteria and their phages, being the most abundant constituents of the aquatic environment, represent an ideal model for studing carbon regulation in the aquatic system. The refractory dissolved organic carbon (DOC), a recently coined terminology from the microbe-driven conversion of bioavailable organic carbon into difficult-to-digest refractory DOC by microbial carbon pump (MCP), is suggested to have the potential to revolutionize our view of carbon sequestration. It is estimated that about 95% of organic carbon is in the form of refractory DOC, which is the largest pool of organic matter in the ocean. The refractory DOC... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6770/version/1 |
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| Constance Rinaldo; Catherine Norton. |
| *Background/Question/Methods*
The Biodiversity Heritage Library (BHL; "http://www.biodiversitylibrary.org/":http://www.biodiversitylibrary.org/), one of the cornerstones of the Encyclopedia of Life (eol.org), now contains nearly 13 million digitized pages of 12,000 titles comprised of 32,000 volumes of the published literature of biodiversity held in the collections of major natural history libraries. The BHL has made this literature available for open access and responsible use as a part of a global “biodiversity commons.” The BHL partnership is working with the global taxonomic community, publishers, organizations such as JSTOR and BIOONE, and the Internet Archive, to ensure that the biodiversity... |
| Tipo: Poster |
Palavras-chave: Ecology; Evolutionary Biology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3620/version/1 |
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| Wei Sheng Zeng; Shou Zheng Tang. |
| Non-linear models with heteroscedasticity are commonly used in ecological and forestry modeling, and logarithmic regression and weighted regression are usually employed to estimate the parameters. Using the single-tree biomass data of three large samples, the bias correction in logarithmic regression for non-linear models was studied and comparison between logarithmic regression and weighted regression was discussed in this paper. Firstly, the imminent cause producing bias in logarithmic regression was analyzed, and a new correction factor was presented with which three commonly used bias correction factors were examined together, and the results showed that the correction factors presented here and derived by Baskerville (1972) should be recommended,... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/6708/version/1 |
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| Ben B. Temperton; Anna Oliver; Dawn Field; Bela Tiwari; Martin Muhling; Ian Joint; Jack Gilbert. |
| On the basis of 16S rRNA gene sequencing, the SAR11 clade of marine bacteria has almost universal distribution, being detected as abundant sequences in all marine provinces. Yet SAR11 sequences are rarely detected in fosmid libraries, suggesting that the widespread abundance may be an artefact of PCR cloning and that SAR 11 has a relatively low abundance. Here the relative abundance of SAR11 is explored in both a fosmid library and a metagenomic sequence data set from the same biological community taken from fjord surface water from Bergen, Norway. Pyrosequenced data and 16S clone data confirmed an 11-15% relative abundance of SAR11 within the community. In contrast not a single SAR11 fosmid was identified in a pooled shotgun sequenced data set of 100... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Genetics & Genomics; Microbiology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/2818/version/1 |
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| Guenther Witzany. |
| Communicative competences enable bacteria to develop, organise and coordinate rich social life with a great variety of behavioral patterns even in which they organise themselves like multicellular organisms. They have existed for almost four billion years and still survive, being part of the most dramatic changes in evolutionary history such as DNA invention, cellular life, invention of nearly all protein types, partial constitution of eukaryotic cells, vertical colonisation of all eukaryotes, high adaptability through horizontal gene transfer and co-operative multispecies colonisation of all ecological niches. Recent research demonstrates that these bacterial competences derive from the aptitude of viruses for natural genome editing.... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Genetics & Genomics; Microbiology; Molecular Cell Biology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1738/version/1 |
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| Yevgeniy Kulikov; Olga Kirichenko. |
| One of the basic principles of environmental protection is the conservation of biological diversity of natural objects. In addressing this issue plays an important role the Red Book of Kazakh-stan, which is one of the main effective instruments for the preservation and restoration of rare and declining in numbers and endangered species. Red Books are the main weapon of environmental education tool for the inventory of rare and endangered species, scientifically sound foundation for their protection. Studies of fish that are listed and recommended for inclusion in the Red Book, is a priority and is evidenced not only on the state of study of the securities and small fish species, but also to demonstrate the quality of protection and conservation of... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Earth & Environment. |
| Ano: 2011 |
URL: http://precedings.nature.com/documents/5687/version/1 |
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| Roderic Page. |
| A major challenge facing biodiversity informatics is integrating data stored in widely distributed databases. Initial efforts have relied on taxonomic names as the shared identifier linking records in different databases. However, taxonomic names have limitations as identifiers, being neither stable nor globally unique, and the pace of molecular taxonomic and phylogenetic research means that a lot of information in public sequence databases is not linked to formal taxonomic names. This review explores the use of other identifiers, such as specimen codes and GenBank accession numbers, to link otherwise disconnected facts in different databases. The structure of these links can also be exploited using the PageRank algorithm to rank the results of searches on... |
| Tipo: Manuscript |
Palavras-chave: Ecology; Bioinformatics. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1760/version/1 |
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| Roberto Gatti Cazzolla. |
| For a long time ecologists have questioned the variations of biodiversity across the latitudinal gradient. Recently it has emerged that the changes in [beta]-diversity are caused simply by changes in the sizes of species pools. I combined the species pool size and the fractal nature of ecosystems to clarify some general patterns of this gradient. Considering temperature, humidity and NPP as the main variables of an ecosystem niche and as the axis of the polygon in the Cartesian plane, it is possible to build fractal hypervolumes, whose the fractal dimension rises up to three, moving towards the equator. It follows that the best figure that graphically synthesizes the evolutionary forces that fit this ecosystem hypervolume is the fractal cauliflower. |
| Tipo: Manuscript |
Palavras-chave: Ecology; Evolutionary Biology. |
| Ano: 2012 |
URL: http://precedings.nature.com/documents/6917/version/1 |
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| Alan Feest; Timothy Aldred; Katrin Jedamzik. |
| The internationally accepted definition of biodiversity creates difficulty in measuring difference and change. The authors suggest that well-sampled data can be used to generate a range of numerical indices reflecting species group characteristics/functionality (Species Richness, Simposons Index, Population Density, Biomass and Species Conservation Value) that can be viewed in combination to create a picture of biodiversity quality. This overall approach has considerable advantages over the currently accepted Convention on biological Diversity definition based on the "variability" of genes, species and ecosystems, since the numerical expression of the indices allows the probability of difference between biodiversity quality trends and... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2009 |
URL: http://precedings.nature.com/documents/3205/version/1 |
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| Shan-Huah Wu; Wei-Chun Chao; Chang-Fu Hsieh. |
| Spatial patterns of conspecific trees are considered as the consequences of biological interactions and environmental influences. They also reflect species interactions in plant communities. However, biological attributes are often neglected while deliberating the factors shaping species distributions. As rising attentions are paid to spatial patterns of tropical forest trees, we noticed that seven Center of Tropical Forest Sites and four Forest Dynamic Plots in Asia and America have presented analogously high proportions of species with aggregated conspecific individuals coincidently. This phenomenon is distinctive and repudiates fundamental ecology hypotheses which suggested dispersed distributions of conspecific tropical trees due to intensive density... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1670/version/1 |
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| CARNEIRO, J. da S.; HAJI, F. N. P.; SANTOS, F. de A. M.. |
| A cultura do tomate na Serra da Ibiapaba, no Estado do Ceará, é considerada uma das atividades agrícolas mais importantes e geradora de divisas para esta região. Entretanto, apresenta como uma das pragas chave a broca pequena, Neoleucinodes elegantalis (Guen.) (Lepidoptera: Pyralidae). Essa praga ocorre geralmente em elevadas infestações, ocasionando danos à produção em até 90%, pela destruição e apodrecimento dos frutos, levando os produtores a realizarem até duas pulverizações por semana. Sua ocorrência foi constatada no Brasil, em 1922, no Ceará, e em 1939, em São Paulo, encontrando-se atualmente disseminada em quase todas as regiões produtoras de tomate do Brasil. Na região Nordeste, a sua ocorrência é generalizada, exceto no Submédio do Vale do São... |
| Tipo: Fôlder / Folheto / Cartilha (INFOTECA-E) |
Palavras-chave: Bioecologia; Controle; Elegantalis; Pest insect; Biology; Bioecology; Control; Tomate; Inseto; Controle biológico; Biologia; Ecologia; Lycopersicon Esculentum; Praga; Biological control; Neoleucinodes; Ecology; Tomatoes. |
| Ano: 1998 |
URL: http://www.infoteca.cnptia.embrapa.br/infoteca/handle/doc/151076 |
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| Landy Soambola, Amelie. |
| Des observations et echantillonnages des hippocampes sont effectues dans le lagon du Grand Recif de Toliara, de l fannee 2006 a 2008, sur les trois especes d fhippocampes inventoriees : Hippocampus borboniensis, H. fuscus et H. histrix. Cette derniere espece est quasi absente dans la capture. H. borboniensis et H. fuscus sont recrutes respectivement a une longueur totale moyenne de 2,4 cm et de 3 cm correspondant a l fage de 3 et de 2 mois. La premiere maturite survient a une longueur totale moyenne de 6,1 cm a l fage de 8 mois pour H. borboniensis et de 5,58 cm a l fage de 8 mois et demi pour H. fuscus. Les deux parametres de croissance obtenus sont de 15,7 cm pour L ‡ (longueur maximale theorique) et 0,6 par an pour K (coefficient du taux de croissance... |
| Tipo: Theses and Dissertations |
Palavras-chave: Fishery biology; Ecology; Breeding; Hippocampus (genus); Breeding methods; Syngnathus variegatus. |
| Ano: 2009 |
URL: http://hdl.handle.net/1834/4970 |
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| Charleyne Bachraty; Pierre Legendre; Daniel Desbruyères. |
| The discovery of deep-sea hydrothermal vent fauna, kilometers deep in the oceans, is a great achievement of 20th-century marine biology. The deep-sea hydrothermal food web does not directly depend on the sun energy. Vent communities rely primarily on trophic associations between chemoautotrophic bacteria and consumers. A small number of endemic taxa are adapted to this highly toxic environment distributed along ridge crests. Where they appeared and how they dispersed is among the important questions ecologists must answer. Here, by statistical analysis of the most comprehensive data base ever assembled about deep-sea hydrothermal fauna, we delineate six major hydrothermal provinces in the World Ocean, then we identify five significant dispersal flows... |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1823/version/1 |
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| Anurup Gohain Barua; Simanta Hazarika; Nayanmoni Saikia; Gaurangadhar Baruah. |
| We have recorded _in vivo_ emission and time-resolved spectra of the firefly species _Pyrophorus noctilucus_. The emission spectrum shows the FWHM value for this particular species to be 55 nm, which is significantly smaller than the half widths reported till now. The time-resolved spectrum reveals that a flash, of duration about a hundred milliseconds, is in fact composed of a number of microsecond pulses. This result suggests that the speed of the enzyme-catalyzed chemiluminescence reaction in the firefly for the emission of light is much greater than is believed to be. |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2007 |
URL: http://precedings.nature.com/documents/1351/version/1 |
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| Anurup Gohain Barua; Simanta Hazarika; Nayanmoni Saikia; Gauranga Dhar Baruah. |
| _In vivo_ emission and time-resolved spectra of firefly _Luciola praeusta_ Kiesenwetter 1874 (Coleoptera : Lampyridae : Luciolinae) have been recorded. The emission spectrum shows the FWHM value for this particular species to be 55 nm, which is significantly narrower than the _in vivo_ half widths reported till now. The time-resolved spectrum reveals that a flash, of duration about a hundred milliseconds, is in fact composed of a number of microsecond pulses. This result suggests that the speed of the enzyme-catalysed chemiluminescence reaction in the firefly for the emission of light is much faster than is believed to be. |
| Tipo: Manuscript |
Palavras-chave: Ecology. |
| Ano: 2008 |
URL: http://precedings.nature.com/documents/1351/version/2 |
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| Registros recuperados: 900 | |
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