scholarly journals MaxEnt algorithm applying to moss species distribution analysis

2020 ◽  
Vol 19 (2) ◽  
pp. 211-214
Author(s):  
O. Yu. Pisarenko
Keyword(s):  
Species Distribution ◽  
Modeling Method ◽  
Distribution Analysis ◽  
Moss Species ◽  
Bioclimatic Modeling ◽  
Maxent Algorithm

Bioclimatic modeling method MaxEnt is tested on objects occupying micro-habitats on the example ofmosses. Data organizing options and the results are discussed.

scholarly journals Bioclimatic modeling of moss distribution: MaxEnt interpretation for test species

2020 ◽  
Vol 24 ◽  
pp. 00066
Author(s):  
Olga Pisarenko ◽  
Natali Makunina
Keyword(s):  
Regional Scale ◽  
Modeling Method ◽  
Test Species ◽  
Moss Species ◽  
Bioclimatic Modeling

Bioclimatic modeling method MaxEnt is tested to micro-habitats occupying objects on the example of five moss species. Modeling is done out on a planetary and regional scale. Results are discussed.

Regulation of intestinal lipid metabolism by fusion-induced fatty liver based on graphene oxide nanopore DNA

2020 ◽  
Vol 10 (6) ◽  
pp. 802-811
Author(s):  
Gemin Xiao ◽  
Hong Shi ◽  
Jiongshan Zhang ◽  
Mei Liao ◽  
Wenhai Guo ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Lipid Metabolism ◽  
Fatty Liver ◽  
Relative Abundance ◽  
Species Distribution ◽  
Normal Population ◽  
Fat Metabolism ◽  
Intestinal Flora ◽  
Alpha Diversity ◽  
Distribution Analysis

The regulation of glucose and lipid metabolism by intestinal microorganisms is closely related to the occurrence of fatty liver. In order to explore the relationship between the distribution of intestinal flora and the occurrence of fatty liver, we extracted fecal DNA from normal people (group C) and patients with fatty liver (group D), sequenced the collected samples with graphene oxide (GO) nano-solid nanopore, and sequenced the V3 and V4 regions of 16S. After screening the sequencing data, all tag sequences of all samples were clustered according to operational taxonomic units (OTUs) using UPARSE 9 software. After determining abundance of OTUs and species annotation of the sequencing results, alpha diversity was analyzed based on an OTU abundance table. Krona (V2.6) 18 software displayed the results of species annotation in an interactive and visual way, and species distribution among groups was compared. The LEfSe method was used to analyze the differences of species distribution among components. After cluster analysis, the number of OTUs in the normal population was 512, the number of intestinal species in fatty liver patients was 541, of which 262 were common species. Alpha diversity analysis revealed reduced relative abundance in the fatty liver patients. The abundance of phylum, class, order, family, genus, and species in each group were compared. The abundance of Pachytene and Proteus increased abnormally and the relative abundance of Clostridium decreased. In addition, the abundance of Enterobacteriaceae in Enterobacteriaceae and Fusobacteria in Fusobacteria decreased. The relative abundance of Bacteroidea, Bacteroideae, and Lachnospiraceae increased. The results of species distribution analysis confirmed that the difference of Fusicantibacter distribution in Lachnospiraceae was significant. Functional analysis of the distribution of the flora revealed the principle role of the flora in fat metabolism. Therefore, it was concluded that Fusicantibacter was the dominant flora in patients with fatty liver, which promoted the formation of fatty liver by enhancing fat metabolism. The findings also demonstrated that GO nanopores can be used for DNA sequencing.

COMPONENTS OF UNCERTAINTY IN SPECIES DISTRIBUTION ANALYSIS: A CASE STUDY OF THE GREAT GREY SHRIKE

Ecology ◽  
2008 ◽  
Vol 89 (12) ◽  
pp. 3371-3386 ◽  
Author(s):  
Carsten F. Dormann ◽  
Oliver Purschke ◽  
Jaime R. García Márquez ◽  
Sven Lautenbach ◽  
Boris Schröder
Keyword(s):  
Species Distribution ◽  
Distribution Analysis ◽  
Grey Shrike

An annotated list of moss species of Serbia

Phytotaxa ◽  
2021 ◽  
Vol 479 (3) ◽  
pp. 207-249
Author(s):  
JOVANA PANTOVIĆ ◽  
MILAN VELJIĆ ◽  
SVETLANA GRDOVIĆ ◽  
MARKO S. SABOVLJEVIĆ
Keyword(s):  
Species Distribution ◽  
Moss Species ◽  
Annotated List ◽  
Infraspecific Taxa

Exploration of Serbian bryophyte flora considerably intensified during last decades, which brought valuable new data on species distribution for the country. Compiled chorological data from Bryo database allowed preparing updated list of moss species occurring in Serbia. Recent taxonomic and nomenclatural changes were taken into account, and taxa critically approached. Total of 638 species and 35 infraspecific taxa are reported for the country. List of taxa includes data on their presence in separate regions and counties of the country.

Mapping possible habitats of plant species on the northern macroslope of the Khamar-Daban range (Southern Siberia) using the bioclimatic modeling method

2018 ◽  
Vol 939 (9) ◽  
pp. 10-19
Author(s):  
Е.А. Rasputina ◽  
N.A. Popov ◽  
V.V. Chepinoga
Keyword(s):  
Environmental Factors ◽  
Plant Species ◽  
Vascular Plants ◽  
Modeling Method ◽  
Environmental Characteristics ◽  
Southern Siberia ◽  
Bioclimatic Modeling

Bioclimatic modeling enables not only mapping the areas of certain plant or animals species on the basis of environmental characteristics, but also investigating the influence of environmental factors on the occurrence of these species. We simulated the possible habitats of three species of higher vascular plants on the northern macroslope of the Khamar-Daban ridge

scholarly journals Uzupełnienia do flory mchów Pasma Policy w polskich Karpatach Zachodnich

2020 ◽  
pp. 203-252
Author(s):  
Ryszard Ochyra ◽  
Adam Stebel ◽  
Henryk Klama ◽  
Katarzyna Biłyk
Keyword(s):  
Species Distribution ◽  
New Records ◽  
Western Carpathians ◽  
Mountain Range ◽  
Moss Species ◽  
Distribution Maps ◽  
Annotated List ◽  
Polish Carpathians

An annotated list of 31 moss species from the Polica Range in the Beskidy Zachodnie Mountains, Polish Western Carpathians, is provided. Of these, 15 species represent new records for this mountain range, while 16 species have so far been considered to be very rare or rare in this area. Tortula mucronifolia Schwägr. is excluded from the moss flora of the Polica Range and the Beskidy Zachodnie. Bucklandiella affinis is recorded for the second time in the Polish Western Carpathians. This species along with Schistidium trichodon var. trichodon is a new addition to the moss flora of the Beskidy Zachodnie, whilst Ditrichum pusillum, Meesia uliginosa and Schistidium elegantulum represent second records of the species concerned in these mountains. Four species of moss, Schistidium elegantulum, S. trichodon var. trichodon, Bucklandiella affinis, Syntrichia latifolia and Meesia uliginosa are known to occur exclusively in the Polica Range within the Beskid Wysoki. Distribution of all species in the study area is mapped and for some species distribution maps in the Polish Carpathians are provided. The moss flora of the Polica Range consists currently of 278 species and 5 varieties. The diversity of the moss flora in the Beskidy Zachodnie is discussed. The richest muscoflora has the Beskid Wysoki (355 species, 1 subspecies and 11 varieties) which is followed by the Beskid Śląski (304 species and 3 varieties), the Gorce (286 species and 9 varieties) and the Beskid Mały (260 species and 8 varieties). Within the Beskid Wysoki Range the richest moss flora has the Babia Góra massif (280 species, 1 subspecies and 11 varieties) and Polica Range (278 species and 5 varieties).

scholarly journals Moss occurrences in Salair-Kuznetsk Region (Altai-Sayan mountain country)

2021 ◽  
Vol 9 ◽  
Author(s):  
Olga Pisarenko
Keyword(s):  
Species Distribution ◽  
Higher Plants ◽  
Moss Species ◽  
South Siberia ◽  
Geomorphological Units ◽  
Herbarium Collection ◽  
Distribution And Ecology ◽  
Sayan Mountain ◽  
Mountain Country ◽  
Occurrence Records

In the flora of large regions, mosses comprise about a quarter of the total diversity of higher plants. However, now mosses are the least studied group of higher plants. Data on moss species distribution are fragmentary, especially in Russia with its vast expanse and low density of botanists. The author for many years has been studying the bryoflora of various areas of the Salair-Kuznetsk Region. In addition to the herbarium collection, the author's bryological relevés were organised as a Database. It stores all the assembled information for the years about the locations of the species, including when the specimens were not placed in the herbarium. The article describes three datasets that were arranged from the author's databases for three geomorphological units in the northwest of Altai-Sayan mountain country (South Siberia). Together, these three units are combined into the Salair-Kuznetsk Region. The datasets are: 1. Moss occurrences in the Kuznetsk upland. The dataset consists of 3940 occurrence records and includes both preserved specimens (1135) and ‘human observations’ of the author (2805). The material was collected mainly from 1992-2011; some samples collected by A. N. Vasiliev in 1970-1971 (165) were also taken into account. A total of 312 moss taxa belonging to 135 genera and 41 families are reported for the region. 2. Moss occurrences in Salair Ridge. The dataset consists of 2442 occurrence records and includes both preserved specimens (553) and ‘human observations’ of the author (1889). The material was collected mainly from 1992-1996; a total of 231 moss taxa belonging to 119 genera and 35 families are reported for the region. 3. Moss occurrences in Kuznetsk Depression. The dataset consists of 1690 occurrence records and includes both preserved specimens (281) and ‘human observations’ of the author (1409). The material was collected mainly from 2007-2014; a total of 155 moss taxa belonging to 85 genera and 30 families are reported for the region. All the records are geo-linked. The uncertainty of coordinates in metres varies from 500.0-10000.0 m for the earliest records that are geo-linked by topo-map, to 10.0-100.0 m for records after 2003 that are geo-linked by GPS. The article summarises the results of the author's long-term bryological investigations in the Salair-Kuznetsk Region (northwest of Altai-Sayan mountain country, South Siberia). In total, 8072 occurrence records for 366 moss species from 148 genera and 41 families are published for the territory. The datasets contribute to filling gaps in the moss species distribution and ecology.

A New System For Optomanual Semiautomatic Quantitative Image Analysis

1977 ◽  
Vol 35 ◽  
pp. 210-211
Author(s):  
H.P. Rohr
Keyword(s):  
Image Analysis ◽  
Volume Density ◽  
List Type ◽  
Distribution Analysis ◽  
Type Number ◽  
Point Counting ◽  
Human Eye ◽  
Quantitative Image ◽  
Point Density ◽  
Electronic Counting

Today, in image analysis the broadest possible rationalization and economization have become desirable. Basically, there are two approaches for image analysis: The image analysis through the so-called scanning methods which are usually performed without the human eye and the systems of optical semiautomatic analysis completely relying on the human eye.The new MOP AM 01 opto-manual system (fig.) represents one of the very promising approaches in this field. The instrument consists of an electronic counting and storing unit, which incorporates a microprocessor and a keyboard for choice of measuring parameters, well designed for easy use.Using the MOP AM 01 there are three possibilities of image analysis:the manual point counting,the opto-manual point counting andthe measurement of absolute areas and/or length (size distribution analysis included).To determine a point density for the calculation of the corresponding volume density the intercepts lying within the structure are scanned with the light pen.

Local atomic structure of relaxor ferroelectric solids studied by pulsed neutron scattering

1994 ◽  
Vol 52 ◽  
pp. 554-555
Author(s):  
T. Egami ◽  
H. D. Rosenfeld ◽  
S. Teslic
Keyword(s):  
Neutron Scattering ◽  
Atomic Structure ◽  
Argonne National Laboratory ◽  
Relaxor Ferroelectrics ◽  
Relaxor Ferroelectric ◽  
Crystallographic Structure ◽  
Chemical Inhomogeneity ◽  
Distribution Analysis ◽  
Ferroelectric Transition ◽  
Pulsed Neutron

Relaxor ferroelectrics, such as Pb(Mg1/3Nb2/3)O3 (PMN) or (Pb·88La ·12)(Zr·65Ti·35)O3 (PLZT), show diffuse ferroelectric transition which depends upon frequency of the a.c. field. In spite of their wide use in various applications details of their atomic structure and the mechanism of relaxor ferroelectric transition are not sufficiently understood. While their crystallographic structure is cubic perovskite, ABO3, their thermal factors (apparent amplitude of thermal vibration) is quite large, suggesting local displacive disorder due to heterovalent ion mixing. Electron microscopy suggests nano-scale structural as well as chemical inhomogeneity.We have studied the atomic structure of these solids by pulsed neutron scattering using the atomic pair-distribution analysis. The measurements were made at the Intense Pulsed Neutron Source (IPNS) of Argonne National Laboratory. Pulsed neutrons are produced by a pulsed proton beam accelerated to 750 MeV hitting a uranium target at a rate of 30 Hz. Even after moderation by a liquid methane moderator high flux of epithermal neutrons with energies ranging up to few eV’s remain.

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