Publications by authors named "Sevcikova H"

Article Synopsis
  • The study focused on the taxonomy of specific species using both morphological and molecular data, leading to the identification of 19 confirmed species across Europe, Asia, and North America.
  • Six new species and one new variety were described, and a variety was elevated to a species level.
  • The research also involved the reassessment of previous classifications, leading to the resurrection of certain names and the synonymization of others, while enhancing the understanding of morphology and distribution of the species.
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Population projections provide predictions of future population sizes for an area. Historically, most population projections have been produced using deterministic or scenario-based approaches and have not assessed uncertainty about future population change. Starting in 2015, however, the United Nations (UN) has produced probabilistic population projections for all countries using a Bayesian approach.

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The package for R provides a set of functions to produce probabilistic projections of the total fertility rates (TFR) for all countries, and is widely used, including as part of the basis for the UN's official population projections for all countries. Liu and Raftery (2020) extended the theoretical model by adding a layer that accounts for the past TFR estimation uncertainty. A major update of implements the new extension.

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Population forecasts are used by governments and the private sector for planning, with horizons up to about three generations (around 2100) for different purposes. The traditional methods are deterministic using scenarios, but probabilistic forecasts are desired to get an idea of accuracy, assess changes, and make decisions involving risks. In a significant breakthrough, since 2015, the United Nations has issued probabilistic population forecasts for all countries using a Bayesian methodology that we review here.

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The social cost of carbon dioxide (SC-CO) measures the monetized value of the damages to society caused by an incremental metric tonne of CO emissions and is a key metric informing climate policy. Used by governments and other decision-makers in benefit-cost analysis for over a decade, SC-CO estimates draw on climate science, economics, demography and other disciplines. However, a 2017 report by the US National Academies of Sciences, Engineering, and Medicine (NASEM) highlighted that current SC-CO estimates no longer reflect the latest research.

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  • The study examines the taxonomy and morphology of Holarctic species within the /romellii clade using both morphological and molecular data, confirming several species classifications.
  • The species is recognized as exclusively Eurasian, with others identified as synonyms, while another is designated a separate North American species.
  • Five new species are introduced, with identification criteria based on characteristics like basidioma size and geographical distribution, highlighting the importance of molecular data for accurate classification.
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Novel species of fungi described in this study include those from various countries as follows: , , and on soil, from stem cankers of , from stem of , and from leaves of , as endophyte from roots of , from stem of , from leaves of × and from roots of , from intertidal wood and (incl. gen. nov.

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We studied the taxonomy of and similar species using morphological and molecular (nrITS, ) data, including a detailed study of the type collection of . Based on our results, we recognize five species in this group: sensu stricto and four other taxa: ; ; and described here as new. All these taxa are distinct from each other based on molecular data, but some of them are semi-cryptic based on morphology and co-occur in the Palaearctic region.

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Projecting mortality for subnational units, or regions, is of great interest to practicing demographers. We seek a probabilistic method for projecting subnational life expectancy that is based on the national Bayesian hierarchical model used by the United Nations, and at the same time is easy to use. We propose three methods of this kind.

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Novel species of fungi described in this study include those from various countries as follows: , on soil, on leaves of on leaves of on leaves of sp., on soil, (incl. gen.

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is one of the taxonomically most complicated genera of Agaricomycetes with several taxonomically lineages. The subgenus of the genus contains species with either urticoid or absent cheilocystidia. In this paper, three new European species, , , and are described as new to science.

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Thirteen new species are formally described: from Pakistan, from India, on from Iran, from China, on species of , , and (Coleoptera, Carabidae) from Nicaragua and Panama, on (Hemiptera, Veliidae) from Brazil, on (Blattodea, Termitidae) from the DR Congo, from Slovenia, from Peru, from China, on from Italy, from , on subsp. from Pakistan. The following new records are reported: on from India; on apple and quince fruits from Iran; from Turkey; and on from Italy; causing tip blight of '' from India; from Madeira, Portugal, new for Macaronesia and Africa; , , and from Russia; on from India; on from Italy; on from Austria; from Turkey; from Wisconsin, USA; and from Turkey.

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Potato (Solanum tuberosum) mutant (ST) lacking one isoform of manganese-stabilizing protein (MSPI) of photosystem II exhibited besides spontaneous tuberization also growth changes with strongly impaired root system development. Previous studies revealed marked changes in carbohydrate levels and allocation within ST plant body. To verify causal relationship between changed carbohydrate balance and root growth restriction we engaged dark grown sucrose-supplied root organ-cultures of ST plants to exclude/confirm shoot effects.

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WEE1 regulates the cell cycle by inactivating cyclin dependent protein kinases (CDKs) via phosphorylation. In yeast and animal cells, CDC25 phosphatase dephosphorylates the CDK releasing cells into mitosis, but in plants, its role is less clear. Expression of fission yeast CDC25 (Spcdc25) in tobacco results in small cell size, premature flowering and increased shoot morphogenetic capacity in culture.

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Rate of photosynthesis and related plant carbohydrate status are crucial factors affecting plant vigor. Sugars providing carbon and energy sources serve also as important signaling molecules governing plant growth and development through a complex regulatory network. These facts are often neglected when mixotrophic cultivation of plants in vitro is used, where artificial exogenous sugar supply hinders studies of metabolism as well as sugar-driven developmental processes.

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Article Synopsis
  • Two proposals have been put forward to allow DNA sequences to be used as types for naming certain fungi, which could fundamentally alter the definition of nomenclatural types and lead to various issues in scientific reproducibility and nomenclatural instability.
  • The authors argue against these proposals, suggesting that they would not effectively address the challenges of naming taxa based solely on DNA and propose instead that formulas for naming candidate taxa could be a better solution without changing existing nomenclature rules.
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The present study introduces seven new species, one new combination, one new variety and several interesting taxonomical notes and/or geographical records. Most of the new taxa are Ascomycetes, but the study also includes a new variety of a Basidiomycete. Novel species include (Discinaceae, Pezizales, Pezizomycetes) from Pakistan growing near and and (Stachybotriaceae, Hypocreales, Sordariomycetes) both isolated from soil in China.

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Background: We consider the problem of probabilistic projection of the total fertility rate (TFR) for subnational regions.

Objective: We seek a method that is consistent with the UN's recently adopted Bayesian method for probabilistic TFR projections for all countries and works well for all countries.

Methods: We assess various possible methods using subnational TFR data for 47 countries.

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Potato represents the third most important crop worldwide and therefore to understand regulations of tuber onset is crucial from both theoretical and practical points of view. Photosynthesis and related carbohydrate status along with phytohormone balance belong to the essential factors in regulation of plant development including storage organ formation. In our work we used potato (Solanum tuberosum) cv.

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We describe , an R package for producing probabilistic population projections for all countries. This uses probabilistic projections of total fertility and life expectancy generated by Bayesian hierarchical models. It produces a sample from the joint posterior predictive distribution of future age- and sex-specific population counts, fertility rates and mortality rates, as well as future numbers of births and deaths.

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We produce probabilistic projections of population for all countries based on probabilistic projections of fertility, mortality, and migration. We compare our projections to those from the United Nations' Probabilistic Population Projections, which uses similar methods for fertility and mortality but deterministic migration projections. We find that uncertainty in migration projection is a substantial contributor to uncertainty in population projections for many countries.

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Article Synopsis
  • Demographic forecasts come with uncertainties that need to be understood for better decision making.
  • While there are various methods to assess this uncertainty, many practitioners in official population statistics are not effectively using these tools.
  • The letter emphasizes the need for better understanding and addressing the challenges surrounding uncertainty assessments to improve official population forecasts and their use in decision making.
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Article Synopsis
  • The United Nations released new population projections, indicating that world population will likely continue growing this century, contrary to previous predictions.
  • There is an 80% probability the global population will rise to between 9.6 billion and 12.3 billion by 2100, with a notable increase expected in Africa due to higher fertility rates.
  • The ratio of working-age individuals to older individuals is projected to decline in all countries, signaling potential challenges for economies and social systems.
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We propose a Bayesian hierarchical model for producing probabilistic forecasts of male period life expectancy at birth for all the countries of the world to 2100. Such forecasts would be an input to the production of probabilistic population projections for all countries, which is currently being considered by the United Nations. To evaluate the method, we conducted an out-of-sample cross-validation experiment, fitting the model to the data from 1950-1995 and using the estimated model to forecast for the subsequent 10 years.

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