Literatura académica sobre el tema "Species delimitation methods"
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Artículos de revistas sobre el tema "Species delimitation methods"
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O'Meara, Brian C. "New Heuristic Methods for Joint Species Delimitation and Species Tree Inference". Systematic Biology 59, n.º 1 (10 de noviembre de 2009): 59–73. http://dx.doi.org/10.1093/sysbio/syp077.
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Rannala, Bruce. "The art and science of species delimitation". Current Zoology 61, n.º 5 (1 de octubre de 2015): 846–53. http://dx.doi.org/10.1093/czoolo/61.5.846.
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Abstract DNA-based approaches to systematics have changed dramatically during the last two decades with the rise of DNA barcoding methods and newer multi-locus methods for species delimitation. During the last half-decade, partly driven by the new sequencing technologies, the focus has shifted to multi-locus sequence data and the identification of species within the framework of the multi-species coalescent (MSC). In this paper, I discuss model-based Bayesian methods for species delimitation that have been developed in recent years using the MSC. Several approximate methods for species delimitation (and their limitations) are also discussed. Explicit species delimitation models have the advantage of clarifying more precisely what is being delimited and what assumptions we are making in doing so. Moreover, the methods can be very powerful when applied to large multi-locus datasets and thus take full advantage of data generated using today’s technologies.
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Tuovila, Hanna y Seppo Huhtinen. "New methods for mycocalicioid fungi". Lichenologist 52, n.º 6 (noviembre de 2020): 403–13. http://dx.doi.org/10.1017/s0024282920000481.
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AbstractThe identification of mycocalicioid species continues to be based on morphological and chemical characters, even though molecular data and substratum preferences can provide many important insights into specific problems associated with species delimitation and other taxonomic challenges. Our results reinforce the usefulness of many morphological and chemical characteristics and reveal several new features that can be used for both species delimitation and identification. Given the fact that mycocalicioid species can rarely be distinguished by just a single character, combinations of different chemical and morphological characteristics must be used. Additional characteristics must also be sought, including those that have previously been overlooked or still need to be discovered. As a result of this search, we introduce a new term, pseudohemiamyloid, for a reversible, KOH resistant/enhanced reaction in Lugol's solution.
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Campillo, Luke C., Anthony J. Barley y Robert C. Thomson. "Model-Based Species Delimitation: Are Coalescent Species Reproductively Isolated?" Systematic Biology 69, n.º 4 (16 de diciembre de 2019): 708–21. http://dx.doi.org/10.1093/sysbio/syz072.
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Abstract A large and growing fraction of systematists define species as independently evolving lineages that may be recognized by analyzing the population genetic history of alleles sampled from individuals belonging to those species. This has motivated the development of increasingly sophisticated statistical models rooted in the multispecies coalescent process. Specifically, these models allow for simultaneous estimation of the number of species present in a sample of individuals and the phylogenetic history of those species using only DNA sequence data from independent loci. These methods hold extraordinary promise for increasing the efficiency of species discovery but require extensive validation to ensure that they are accurate and precise. Whether the species identified by these methods correspond to the species that would be recognized by alternative species recognition criteria (such as measurements of reproductive isolation) is currently an open question and a subject of vigorous debate. Here, we perform an empirical test of these methods by making use of a classic model system in the history of speciation research, flies of the genus Drosophila. Specifically, we use the uniquely comprehensive data on reproductive isolation that is available for this system, along with DNA sequence data, to ask whether Drosophila species inferred under the multispecies coalescent model correspond to those recognized by many decades of speciation research. We found that coalescent based and reproductive isolation-based methods of inferring species boundaries are concordant for 77% of the species pairs. We explore and discuss potential explanations for these discrepancies. We also found that the amount of prezygotic isolation between two species is a strong predictor of the posterior probability of species boundaries based on DNA sequence data, regardless of whether the species pairs are sympatrically or allopatrically distributed. [BPP; Drosophila speciation; genetic distance; multispecies coalescent.]
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Košuthová, Alica, Martin Westberg, Mónica A. G. Otálora y Mats Wedin. "Rostania revised: testing generic delimitations in Collemataceae (Peltigerales, Lecanoromycetes)". MycoKeys 47 (20 de febrero de 2019): 17–33. http://dx.doi.org/10.3897/mycokeys.47.32227.
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Here, we test the current generic delimitation of Rostania (Collemataceae, Peltigerales, Ascomycota) utilizing molecular phylogeny and morphological investigations. Using DNA sequence data from the mitochondrial SSU rDNA and two nuclear protein-coding genes (MCM7 and β-tubulin) and utilizing parsimony, maximum likelihood and Bayesian phylogenetic methods, Rostania is shown to be non-monophyletic in the current sense. A new generic delimitation of Rostania is thus proposed, in which the genus is monophyletic, and three species (Rostaniacoccophylla, R.paramensis, R.quadrifida) are excluded and transferred to other genera. Rostaniaoccultata is further non-monophyletic, and a more detailed investigation of species delimitations in Rostania s. str. is needed. The new combinations Leptogiumparamense and Scytiniumquadrifidum are proposed.
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Edwards, Danielle L. y L. Lacey Knowles. "Species detection and individual assignment in species delimitation: can integrative data increase efficacy?" Proceedings of the Royal Society B: Biological Sciences 281, n.º 1777 (22 de febrero de 2014): 20132765. http://dx.doi.org/10.1098/rspb.2013.2765.
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Statistical species delimitation usually relies on singular data, primarily genetic, for detecting putative species and individual assignment to putative species. Given the variety of speciation mechanisms, singular data may not adequately represent the genetic, morphological and ecological diversity relevant to species delimitation. We describe a methodological framework combining multivariate and clustering techniques that uses genetic, morphological and ecological data to detect and assign individuals to putative species. Our approach recovers a similar number of species recognized using traditional, qualitative taxonomic approaches that are not detected when using purely genetic methods. Furthermore, our approach detects groupings that traditional, qualitative taxonomic approaches do not. This empirical test suggests that our approach to detecting and assigning individuals to putative species could be useful in species delimitation despite varying levels of differentiation across genetic, phenotypic and ecological axes. This work highlights a critical, and often overlooked, aspect of the process of statistical species delimitation—species detection and individual assignment. Irrespective of the species delimitation approach used, all downstream processing relies on how individuals are initially assigned, and the practices and statistical issues surrounding individual assignment warrant careful consideration.
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Özgişi, Kurtuluş, Burcu Tarıkahya-Hacıoğlu y Atilla Ocak. "Species delimitation in Noccaea densiflora species complex (Brassicaceae) based on morphological and molecular data". Botany 99, n.º 7 (julio de 2021): 389–402. http://dx.doi.org/10.1139/cjb-2020-0184.
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The accurate identification of an organism is the basis of all biological disciplines. Although there have been many different species concepts and methods proposed, researchers generally choose the most appropriate concept according to their interests. However, each species concept has both advantages and disadvantages. In such cases, an integrated concept based on evidence obtained from different species concepts and methods is suitable for the accurate delimitation of a species. The biggest dilemma of integrated species delimitation methods is the inconsistency between species concepts and methods. Herein, the congruency of the different concepts and methods was tested to reveal the relationship of the Noccaea densiflora species complex. Nuclear ribosomal internal transcribed spacer, chloroplast trnL-F, and trnQ-5′rps16 regions were used for species delimitation using the multispecies coalescent model as implemented in two developed Bayesian methods. Internal transcribed spacer and trnL-F regions were also used for Templeton, Crandall, and Singh haplotype network analyses. In addition to morphological measurements from different populations and vouchers, specific bioclimatic data values were also used for the principal component analysis. Based on the analyses, it was determined that only one population of N. densiflora (Boiss. & Kotschy) F.K. Mey. and one of Noccaea microstyla (Boiss.) F.K. Mey. were clearly distinct, whereas the rest of the specimens remain taxonomically uncertain.
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Lu, Zhiqiang, Yongshuai Sun, Ying Li, Yongzhi Yang, Gaini Wang y Jianquan Liu. "Species delimitation and hybridization history of a hazel species complex". Annals of Botany 127, n.º 7 (10 de febrero de 2021): 875–86. http://dx.doi.org/10.1093/aob/mcab015.
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Abstract Background and Aims Hybridization increases species adaptation and biodiversity but also obscures species boundaries. In this study, species delimitation and hybridization history were examined within one Chinese hazel species complex (Corylus chinensis–Corylus fargesii). Two species including four varieties have already been described for this complex, with overlapping distributions. Methods A total of 322 trees from 44 populations of these four varieties across their ranges were sampled for morphological and molecular analyses. Climatic datasets based on 108 geographical locations were used to evaluate their niche differentiations. Flowering phenology was also observed for two co-occurring species or varieties. Key Results Four statistically different phenotypic clusters were revealed, but these clusters were highly inconsistent with the traditional taxonomic groups. All the clusters showed statistically distinct niches, with complete or partial geographical isolation. Only two clusters displayed a distributional overlap, but they had distinct flowering phenologies at the site where they co-occurred. Population-level evidence based on the genotypes of ten simple sequence repeat loci supported four phenotypic clusters. In addition, one cluster was shown to have an admixed genetic composition derived from the other three clusters through repeated historical hybridizations. Conclusions Based on our new evidence, it is better to treat the four clusters identified here as four independent species. One of them was shown to have an admixed genetic composition derived from the other three through repeated historical hybridizations. This study highlights the importance of applying integrative and statistical methods to infer species delimitations and hybridization history. Such a protocol should be adopted widely for future taxonomic studies.
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Lim, Gwynne S., Michael Balke y Rudolf Meier. "Determining Species Boundaries in a World Full of Rarity: Singletons, Species Delimitation Methods". Systematic Biology 61, n.º 1 (11 de abril de 2011): 165–69. http://dx.doi.org/10.1093/sysbio/syr030.
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Haelewaters, D. y D. H. Pfister. "Morphological Species of Gloeandromyces (Ascomycota, Laboulbeniales) Evaluated Using Single-locus Species Delimitation Methods". Fungal Systematics and Evolution 3, n.º 1 (15 de junio de 2019): 19–34. http://dx.doi.org/10.3114/fuse.2019.03.03.
Texto completoTesis sobre el tema "Species delimitation methods"
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Camargo, Bentaberry Arley. "Species Trees and Species Delimitation with Multilocus Data and Coalescent-based Methods: Resolving the Speciation History of the Liolaemus darwinii Group (Squamata, Tropiduridae)". BYU ScholarsArchive, 2011. https://scholarsarchive.byu.edu/etd/2649.
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The inference of species boundaries and phylogenetic relationships are fundamental for evolutionary, ecological, and conservation studies. The resolution of species boundaries and the inference of phylogenetic relationships among species are required to define the units of analysis and to find the most closely related units for evaluating alternative models of speciation. I highlight lizards as model organisms for ecological and evolutionary studies, emphasizing their contributions to advances in understanding linkages between phylogeography and speciation. In this dissertation, I focus on the phylogenetic relationships of the lizards in the Liolaemus darwinii group, and the species boundaries of a nested clade within the group, the L. darwinii complex, because of several advantages that make these taxa ideal for phylogeographic studies of speciation. I infer a phylogeny for the L. darwinii group based on DNA sequences of 20 loci (19 nuclear and 1 mitochondrial) using species trees methods that take into account the incongruence among gene trees. I found the minimum number of loci, number of sequences per species, and number of base pairs per locus that should be included in an analysis for an accurate and precise estimate of the species tree. The species tree based on all available data support a clade of closely related species (L. darwinii, L. grosseorum, and L. laurenti) known as the L. darwinii complex. A new method for species delimitation using Approximate Bayesian Computation is introduced and is shown to accurately delimit species given that limited or no gene flow has occurred after divergence and despite biased estimates of demographic parameters. ABC analyses supported the distinctness of two lineages within L. darwinii under a model of speciation with gene flow. Based on the species tree and the species limits obtained in this dissertation, phylogenetic comparative methods can be carried out to address the morphological and ecological evolution in the L. darwinii group and several sister species can be used for testing the alternative speciation models via correlation analyses of genetic, morphological, and ecological datasets. Future studies should assess the role speciation due to adaptive processes and its association the species' ecological niches and life histories.
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Reder, Tanja [Verfasser] y Michael [Gutachter] Melkonian. "A case study of species delimitation with molecular methods: the algal genus Microthamnion (Microthamniales,Trebouxiophyceae) / Tanja Reder ; Gutachter: Michael Melkonian". Köln : Universitäts- und Stadtbibliothek Köln, 2019. http://d-nb.info/1202920322/34.
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Stoch, Fabio. "Molecular taxonomy, phylogeny and biogeography of European niphargids (Crustacea, Amphipoda)". Doctoral thesis, Universite Libre de Bruxelles, 2021. http://hdl.handle.net/2013/ULB-DIPOT:oai:dipot.ulb.ac.be:2013/326119.
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Les écosystèmes des eaux souterraines sont de plus en plus reconnus pour leur faune endémique, phylogénétiquement ancienne et écologiquement spécialisée. Avec plus de 425 espèces décrites, les amphipodes niphargidés constituent la famille des eaux souterraines la plus riche en espèces au monde et un système modèle intéressant pour la biologie de l'évolution. Cependant, les scientifiques doivent faire face à des données incomplètes et biaisées en raison de trois déficits majeurs: le déficit Linnéen pour la taxonomie, le déficit Darwinien pour la phylogénie, et le déficit Wallacien pour la biogéographie. La présente thèse vise à évaluer l'importance de ces déficits chez les niphargidés, ouvrant ainsi la voie pour y remédier. Le premier chapitre est une évaluation des effets de la découverte d'espèces cryptiques (une des causes du déficit Linnéen) sur notre compréhension des modèles de distribution à grande échelle de la diversité des niphargidés. Contrairement à ce que l'on attendait, les espèces cryptiques putatives sont réparties de manière homogène le long des gradients environnementaux, et leur découverte ne modifie donc pas notre compréhension des modèles de distribution. Le deuxième chapitre analyse l'importance de l'application des techniques moléculaires à la taxonomie des niphargidés. En étudiant le genre Microniphargus, la morphologie seule s'est avérée peu informative en raison de la pédomorphose et de l'homoplasie. L'utilisation de marqueurs ADN a permis d'attribuer le genre à une famille différente (Pseudoniphargidae), venant éclaircir les relations phylogénétiques au sein des Niphargidae (et contribuant ainsi à remédier au déficit Darwinien). Le troisième chapitre traite du rôle des régressions et transgressions marines sur la distribution des niphargidés en utilisant la biogéographie moléculaire et une modélisation biogéographique innovante (afin de remédier au déficit Wallacien). Les résultats soutiennent l'idée que la dispersion a joué un rôle essentiel dans la biogéographie historique des niphargidés, en montrant que leurs voies de dispersion sont corrélées à des événements paléogéographiques anciens. Enfin, le quatrième chapitre traite de la taxonomie, de la phylogénie et de la biogéographie d'un clade de niphargidés distribué dans la région des Alpes et des Carpates, et illustre un cas de discordance mitonucléaire dans la délimitation d'espèces vivant dans des zones affectées par les glaciations quaternaires. Une histoire complexe de divergence de lignées évolutives et de contacts secondaires pendant les fluctuations climatiques du Pléistocène explique la plus grande variabilité de l'ADN mitochondrial par rapport aux marqueurs nucléaires. Dans une telle situation, la description formelle d'espèces cryptiques basée sur le seul barcodage de l'ADN mitochondrial, comme dans certains articles récents sur les niphargidés, n'est pas recommandée. Cette thèse ouvre plusieurs perspectives pour des recherches futures basées sur la taxonomie intégrative et la modélisation biogéographique, permettant aux niphargidés très diversifiés de jouer un rôle majeur dans la surveillance des écosystèmes des eaux souterraines.Doctorat en Sciences
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Gélin, Pauline. "Délimitation d'espèces et connectivité chez les coraux du genre Pocillopora dans l'Indo-Pacifique". Thesis, La Réunion, 2016. http://www.theses.fr/2016LARE0041/document.
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Ce travail de thèse porte sur la connectivité des populations de coraux du genre Pocillopora dans le Sud-Ouest de l'océan Indien et l'océan Pacifique tropical. Ces coraux sont répartis sur toute la frange tropicale des océans Indien et Pacifique. Traditionnellement, les espèces étaient identifiées sur la base critères morphologies [17 espèces décrites dans Veron (2000)]. Différentes études utilisant des données génétiques ont révélé que la délimitation des espèces était parfois floue chez ces coraux. Ainsi, au cours de ce travail, l'utilisation de méthodes de délimitation d'espèces à partir d'ADN mitochondrial (ABGD, GMYC, PTP) et nucléaire (haplowebs) 16 hypothèses primaires d'espèces (PSH) ont été identifiées. Ces PSH ont ensuite été confrontées à des tests d'assignement à partir de marqueurs microsatellites, révélant un minimum de 18 hypothèses d'espèces secondaires (SSH). Une fois que les hypothèses d'espèces sont définies, il est possible de réaliser des études de connectivité. Au cours de ce travail, deux hypothèses d'espèces présentant des écologies différentes ont été choisies pour mener ces analyses. La première, Pocillopora damicornis type β (SSH05) a été échantillonnée dans les lagons et la seconde, Pocillopora eydouxi (SSH09) a, quant à elle, été échantillonnée sur la pente externe. L'estimation de la structure génétique des populations a permis d'estimer les modes de reproduction (sexuée ou asexuée) chez ces deux hypothèses d'espèces et les analyses de connectivité ont révélé des patterns de structuration complexes pour chacune des SSHsThis work focuses on the connectivity among populations of the coral genus Pocillopora in the Southwestern Indian Ocean and the Southwestern Pacific Ocean. These corals are widely distributed throughout the tropical fringe of the Indian and Pacific oceans. Traditionally, species were identified on the basis of morphological criteria [17 species described in Veron (2000)]. Different studies using genetic data revealed that the delimitation of species was sometimes blurred in these corals. Thus, in this work, the use of species delineation methods from mitochondrial (ABGD, GMYC, PTP) and nuclear (haplowebs) DNA, 16 primary species hypotheses (PSH) were identified. These PSHs were then confronted to assignment tests from microsatellite loci, revealing a minimum of 18 secondary species hypotheses (SSH). Once the species hypotheses are defined, it is possible to conduct connectivity studies. In this work, two SSHs with different ecologies were chosen to carry out these analyses. The first, Pocillopora damicornis type β (SSH05) was sampled in the lagoons and the second, Pocillopora eydouxi (SSH09) was sampled on the outer slope. The estimation of the genetic structure of the populations made possible to estimate the reproductive modes (sexual or asexual) in these two SSHs and the connectivity analyzes revealed complex structuring patterns for each of the SSHs
Libros sobre el tema "Species delimitation methods"
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Arroyo-Cabrales, Joaquin y Eduardo Corona-M. Advances in hunter-gatherer research in Mexico. Editado por Umberto Albarella, Mauro Rizzetto, Hannah Russ, Kim Vickers y Sarah Viner-Daniels. Oxford University Press, 2017. http://dx.doi.org/10.1093/oxfordhb/9780199686476.013.40.
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Interest in the first hunter-gatherer populations of Mexico has increased in the last fifteen years. Exploration of the Late Pleistocene localities involved in the early peopling of Mexico, including the discovery of new ones and reanalysis of known ones, and the application of new methods and techniques (e.g. AMS radiocarbon dating, stable isotopes, scanning electron microscopy, palaeobotanical analysis) have increased. Archaeozoology has contributed to this expansion by increasing the record of terrestrial vertebrates, improving understanding of the record and delimitation of distributional ranges of extinct species. There is now more information on the type of diet of some extinct herbivores and hypotheses about the status of local palaeoenvironments have been provided. Questions remain about the interactions between human migrations and the environments, specifically the degree of influence that humans had in the extinction of mega- and mesofaunas, and the diversity of subsistence strategies employed by hunter-gatherers in the Late Pleistocene.
Capítulos de libros sobre el tema "Species delimitation methods"
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Barraclough, Timothy G. "Why are there species?" En The Evolutionary Biology of Species, 52–82. Oxford University Press, 2019. http://dx.doi.org/10.1093/oso/9780198749745.003.0004.
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This chapter continues the discussion of evolutionary methods of species delimitation by exploring how multilocus methods can be used to delimit reproductively isolated groups, and how genetic and trait data can be used in concert to delimit groups that experience divergent selection. These methods provide a way to evaluate the different mechanisms leading to cohesion within species and divergence between them. Multilocus data are scarcer at present than single-locus data discussed in chapter 3, and more work is needed to test alternative hypotheses for the pattern of reproductive isolation—does it generally fall into discrete units or are there broader or gradually declining rates of gene exchange? Divergent selection is less commonly used as a metric for delimiting species, and possible new methods are introduced. Possible uses of whole-genome data are discussed for combining these approaches and testing whether reproductive isolation and divergent selection tend to overlap to generate species or whether more complex models of diversity are required.
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Kudin, Serhii. "SYNERGETICS AS A METHODOLOGICAL APPROACH TO THE STUDY OF SOCIAL, LEGAL, HISTORICAL AND LEGAL SYSTEMS". En European vector of development of the modern scientific researches. Publishing House “Baltija Publishing”, 2021. http://dx.doi.org/10.30525/978-9934-26-077-3-37.
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The subject of this publication is synergetics as a methodological approach to the study of social, legal, historical and legal systems, and the aim is to identify its characteristics as a methodological approach. Methods such as philosophical dialectics, analysis, synthesis, deduction, induction, synergetic, systemic, comparative historical, special legal, etc. were used in the study. As a result, it is concluded that synergetics is considered by scientists as a scientific picture of the world, independent science, methodology, interdisciplinary approach, private science theory, general scientific theory, scientific paradigm, so today it is in a state of formation. It was found that as a methodological approach, synergetics directs efforts to the scientific study of such an aspect of development as "self-organization", as well as the self-organization of such a part of matter as systems of different nature, meeting the criteria of complexity, openness, dissipation, to study the self-organization of systems within the scheme: "order" – "chaos" – "order". It is proved that in the study of social systems the main task of the synergetic approach is to identify a peculiar type of patterns of social self-organization, which differ from the patterns of self-organization in natural systems. It is substantiated that the synergetic approach has a number of heuristic possibilities in the study of some legal systems and in general directs efforts to identify the specifics of the laws of self-organization in the legal sphere, the implementation of the mechanism of legal self-organization as a result of mutual transitions of the legal order and chaos. It is revealed that the specific problems that arise when using this approach are the definition of "legal chaos", the identification of the mechanism of exchange of "legal information, matter and energy" between the legal system and the "environment", the essence of the synthesis of legal order and chaos. It is concluded that the synergetic approach has features in the study of historical and legal systems in the field of comparative history of law, which are due to the limitation of the "historical plane" of research and identify the impact of fluctuations on certain scenarios. It is determined that the nonlinearity of the evolution of historical and legal systems determines the perception of the view of the comparative history of law as an alternative and multivariate process. This allows the development in the field of alternative comparative history of law: the search for alternative in the future potentially positive options for the development of historical and legal systems. At the same time, the basis should be the modelling of comparative situations with the inclusion of the past and taking into account the impact of the future on the present. It is proved that the application of a synergetic approach in comparative and historical legal research, where the object is historical and legal systems, has a number of specific problems. It has been found that such problems are the discovery of the essence of the exchange between the "historical and legal system" and the "environment" of matter, information, energy; restrictions on the use of mathematical methods; search for criteria for distinguishing between objective and subjective factors that have influenced the choice of this particular "scenario" at the bifurcation point; delimitation of self-organization of structural elements of the system and their organization as a consequence of administrative intervention.
Actas de conferencias sobre el tema "Species delimitation methods"
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Pukowiec-Kurda, Katarzyna y Urszula Myga-Piatek. "Application of New Methods of Environment Analysis and Assessment in Landscape Audits – Case Studies of Urban Areas Like Czestochowa, Poland". En Environmental Engineering. VGTU Technika, 2017. http://dx.doi.org/10.3846/enviro.2017.116.
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Following the 2000 European Landscape Convention, a new act strengthening landscape protection instruments has been in force since 2015. It sets forth legal aspects of landscape shaping (Dziennik Ustaw 2015, poz. 774) and introduces landscape audits at the province level. A landscape audit consists in identification and characterization of selected landscapes, assessment of their value, selection of so-called priority landscapes and identification of threats for preservation of their value. An audit complies with GIS standards. Analyses use source materials, i.e. digital maps of physical-geographical mesoregions, current topographic maps of digital resources of cartographic databases, latest orthophotomaps and DTMs, maps of potential vegetation, geobotanic regionalization, historic-cultural regionalization and natural landscape types, documentation of historical and cultural values and related complementary resources. A special new methodology (Solon et al. 2014), developed for auditing, was tested in 2015 in an urban area (Myga-Piatek et al. 2015). Landscapes are characterized by determining their analytic (natural and cultural) and synthetic features, with particular focus on the stage of delimitation and identification of landscape units in urban areas. Czestochowa was selected as a case study due to its large natural (karst landscapes of the Czestochowa Upland, numerous forests, nature reserves) and cultural (Saint Mary’s Sanctuary, unique urban architecture) potential. Czestochowa is also a city of former iron ore and mineral resources exploitation, still active industry, dynamic urban sprawl within former farming areas, and dynamically growing tourism. Landscape delimitation and identification distinguished 75 landscape units basing on uniform landscape background (uniform cover and use of the land). Landscape assessment used a new assessment method for anthropogenic transformation of landscape – the indicator describing the correlation between the mean shape index (MSI) and the Shannon diversity index (SHDI) (Pukowiec-Kurda, Sobala 2016). Particular threats and planning suggestions, useful in development of urban areas, were presented for selected priority landscapes.
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Dos Santos Fontes Pereira, Lílian, Joaquim José Guilherme de Aragão, Yaeko Yamashita y Rayssa Brandão. "Fiscal Feasibility Assessment Applied to Transport Infrastructure Projects". En CIT2016. Congreso de Ingeniería del Transporte. Valencia: Universitat Politècnica València, 2016. http://dx.doi.org/10.4995/cit2016.2016.4116.
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The demand for transport infrastructure investment is a latent issue for several countries, mainly for developing countries. However, investments in major logistics projects should be carefully evaluated, in order that their deployment induces development without endangering fiscal sustainability by excessive public indebtedness. Fiscal accounting practices used currently in the feasibility studies of transport infrastructures in Brazil are very limited, as they do not consider indirect and induced effects of the infrastructure investment in the fiscal evaluation. In addition, the corresponding influence area has not an established delimitation method. The aim of the present paper is to develop a model for calculating economic and fiscal impacts of transport infrastructure investment projects that includes the direct, indirect and induced effects within a reference area do be determined. First, different project assessment guides in Brazil and abroad are examined with a special focus on the assessment of economic and fiscal impacts of the projects. Based on the assessment experience and on the definition of the fiscal balance of an infrastructure project, the next step sets up a framework for the calculation of the impacts, using more simplified data.DOI: http://dx.doi.org/10.4995/CIT2016.2016.4116