Taxonomia

Bicudo, Carlos Eduardo de Mattos

doi:10.1590/s1676-06032004000100001

Cited by 6 publications

(5 citation statements)

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“…From its beginnings, by using the phenotype, taxonomy has progressed with the continuous use of different tools, evolving enough to enable a better understanding of how genes control morphology today. In order to provide crucial data on ecology, evolution, and biogeography, and a rational framework for phylogenetic and phylogeographic studies, "modern" taxonomy (whatever this frequently used expression means) requires intensive collecting and observation, detailed measurement, description, and illustration, as well as information at the cellular and molecular levels (Bicudo 2004).…”

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confidence: 99%

Why we have no serious alternatives but cooperative taxonomy

Pupulin

2016

Lankesteriana

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abstract. Taxonomic work has been historically regarded as a two-fold discipline. The first, which is basically aimed at answering the question about the diversity in whatever group under study, includes most of the "biological" questions of the research. Understanding of genetic and morphological variation, structure of populations and life cycles, biogeography and phylogeography, ecological modeling, pollination and other biological components is required to define the relationships among the taxa of the group and eventually to describe their diversity. The second part of the work consists in applying a correct name to all of the organisms as they result from the biological work. This second step is usually interpreted as the documentary component of the research, and in fact it mostly deals with the document sources and the rules of biological nomenclature (such as protologues, types and other historical materials associated with the type collections, etc.). However, the use of nomenclatural sources with little or no consideration for the biological aspects of the concerned organisms can be misleading, and the same concept of "type" can be hardly understood if not framed in a rich biological context. Type specimens are just random, individual samples that must be interpreted in the context of the geographical and biological integrity of any given species, and this requires at least some direct knowledge of the organisms and their biology. When the geographical origin of type specimens lies outside the political boundaries of a given study area, taxonomic research is seriously hampered by the impossibility to visualize and understand them in a biological framework. A specific case from the research intended to complete the treatment of the Orchidaceae for the flora of Costa Rica will exemplify how a cooperative approach based on a shared methodology may be the only way to resolve the taxonomy of complex species.resumen. El trabajo taxonómico ha sido históricamente considerado como una disciplina doble. Por un lado, su objetivo fundamental es responder a la pregunta sobre la diversidad de cualquier grupo bajo estudio, y esto incluye la mayoría de las preguntas "biológicas" de la investigación. Para entender las relaciones y parentescos entre los taxones de un determinado grupo, y finalmente describir su diversidad, se requiere de la comprensión de la variación genética y morfológica, de la estructura de las poblaciones y sus ciclos de vida, de la bio-y filogeografía, de los modelos ecológicos, así como de la polinización y otros componentes bióticos que interactúan con los taxones en estudio. La segunda parte del trabajo consiste en la aplicación de un nombre correcto a cada uno de los organismos así como resultan identificados a través de al etapa biológica del estudio. Esta segunda etapa se interpreta usualmente como la componente documentaria de la investigación, y de hecho tienen mayormente que ver con las fuentes documentales y las reglas de la nomenclatura biológica (tales como protólogos, tipos y otros m...

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confidence: 99%

Why we have no serious alternatives but cooperative taxonomy

Pupulin

2016

Lankesteriana

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“…Taxonomic studies have always been present in research in the region, with a frequency of (6%) (Figure 5). Since taxonomy is the oldest area of the natural sciences, for many years it was the most representative in biodiversity studies and natural history courses (Bicudo, 2004). In addition, taxonomy helps discover species present in environments, which is fundamental for a posteriori ecological studies.…”

Section: Study Themementioning

confidence: 99%

Upper Paraná River floodplain: synthesizing knowledge over time

Osório

Rodrigues

2021

Acta Limnol. Bras.

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Aim Considering the great environmental and social impact that floodplains have, several studies have been performed in the upper Paraná River floodplain. In this study, we applied a scientometric analysis to understand the evolution of scientific knowledge generated in the Upper Paraná River floodplain, based on studies published in this area. Methods We searched the literature published from 1995 to 2018 using the indexed database - Thomson ISI Web of Science. The following information was obtained for each scientific article: a) year of publication; b) place of research; c) research institution; d) study approach; e) environments; f) subject matter; g) theoretical approach; h) taxonomic groups. Results We found 435 published articles from different study areas (such as: exact and earth sciences, environmental sciences, social and human sciences, health sciences) that used this floodplain as a study area. The linear regression model showed an increase in the number of articles throughout the years. Studies with ecological themes were most prominent, ensuring research with various theoretical approaches and different biological communities used as proxies. Conclusions With this study, we conclude that long-term research was fundamental in generating data to address ecological issues and describe the dynamics of this plain. Studies such as these must have more political and financial support to develop basic scientific studies that can subsidize data for conservation programs and government policies, in order to maintain ecosystem services such as fishing and the availability of quality water.

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“…runs from -∞ to ∞ and most (principal valued here) integrals in terms of these hyperbolic angles cannot be found in a closed form. (To that point, there exist a semiperturbative prospect to work directly in Minkowski space, the first iteration of SDE was performed in the paper [12], however single real pole propagator was necessary input to perform some integration analytically)…”

Section: From Minkowski Space To Temporal Euclidean Space Etmentioning

confidence: 99%

The quark Schwinger–Dyson equation in temporal Euclidean space

Sauli¹,

Batiz²

2009

J. Phys. G: Nucl. Part. Phys.

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We present an elementary nonperturbative method to obtain Green's functions (GFs) for timelike momenta. We assume there are no singularities in the second and the fourth quadrants of the complex plane of space momentum components and perform a 3d analogue of Wick rotation. This procedure defines Greens functions in a timelike Euclidean space. As an example we consider the quark propagator in QCD. While for weak coupling, this method is obviously equivalent to perturbation theory, for a realistic QCD coupling a complex part of the quark mass and renormalization wave function has been spontaneously generated even below the standard perturbative threshold. Therefore, our method favors a confinement mechanism based on the lack of real poles.

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Taxonomia

Cited by 6 publications

References 0 publications

Why we have no serious alternatives but cooperative taxonomy

Why we have no serious alternatives but cooperative taxonomy

Upper Paraná River floodplain: synthesizing knowledge over time

The quark Schwinger–Dyson equation in temporal Euclidean space

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