Results 111 to 120 of about 170,127 (368)
Polyhedral geometry of Phylogenetic Rogue Taxa [PDF]
arXiv, 2010 It is well known among phylogeneticists that adding an extra taxon (e.g. species) to a data set can alter the structure of the optimal phylogenetic tree in surprising ways. However, little is known about this "rogue taxon" effect. In this paper we characterize the behavior of balanced minimum evolution (BME) phylogenetics on data sets of this type ...
arxiv
Testing the Agreement of Trees with Internal Labels [PDF]
arXiv, 2020 The input to the agreement problem is a collection $P = \{T_1, T_2, \dots , T_k\}$ of phylogenetic trees, called input trees, over partially overlapping sets of taxa. The question is whether there exists a tree $T$, called an agreement tree, whose taxon set is the union of the taxon sets of the input trees, such that for each $i \in \{1, 2, \dots , k\}$
arxiv
Advanced Science, EarlyView.This study proposes a two‐step biological strategy to synergistically enhance the three stages of anaerobic digestion, ultimately eliminating the extreme ammonia inhibition and breaking through the inefficiency bottleneck of conventional biotechnology.
Heng Wu +6 more
wiley +1 more source
Lizards and amphisbaenians (Reptilia, Squamata) from the middle Eocene of Mazaterón (Soria, Spain)
The Anatomical Record, EarlyView., 2023 Abstract The assemblage of lizards and amphisbaenians (Reptilia, Squamata) from the middle Eocene locality of Mazaterón (Spain) is described. Considering the rather limited material available for the study, the assemblage shows a moderate diversity with eight taxa corresponding to five different families.
Arnau Bolet
wiley +1 more source
Winter grafting of oaks Quercus L.
Horticultural Science, 2006 In the years 1999-2004 the propagation technology of winter grafting was studied in five oak taxa: Quercus frainetto, Q. macranthera, Q. pubescens ssp. anatolica, Q. virgiliana and Q. robur Fastigiata.
J. Obdržálek, J. Jílková
doaj +1 more source
Microcostatus elisabethianus, a new limnoterrestrial diatom species (Bacillariophyta) from the sub-Antarctic region [PDF]
Plant Ecology and Evolution, 2019 Background and aims – During a survey of the soil diatom flora of the sub-Antarctic islands in the southern Indian Ocean, an unknown small-celled naviculoid taxon was discovered living in small cracks in cliffs bordering the ocean. The taxon showed a set
Bart Van de Vijver, Luc Ector
doaj +3 more sources
Modeling microbial abundances and dysbiosis with beta-binomial regression [PDF]
arXiv, 2019 Using a sample from a population to estimate the proportion of the population with a certain category label is a broadly important problem. In the context of microbiome studies, this problem arises when researchers wish to use a sample from a population of microbes to estimate the population proportion of a particular taxon, known as the taxon's ...
arxiv
Scientific Reports, 2016 The analysis of environmental microbial communities has largely relied on a PCR-dependent amplification of genes entailing species identity as 16S rRNA. This approach is susceptible to biases depending on the level of primer matching in different species.
R. Rosselli +11 more
semanticscholar +1 more source
Nota Lepidopterologica, 2017 Pseudobankesia keersmaekersi sp. n. (Lepidoptera, Psychidae, Taleporiinae) is described from Greece and compared with its likely close relatives Pseudobankesia arahova Stengel, 1990 and Pseudobankesia darwinii Stengel, 1990.
Wilfried R. Arnscheid, Hans Henderickx
doaj +3 more sources
A Problem in Paleobiology [PDF]
arXiv, 2002 We present a stochastic model for the size of a taxon in paleobiology, in which we allow for the evolution of new taxon members, and both individual and catastrophic extinction events. The model uses ideas from the theory of birth and death processes.
arxiv