scholarly journals Distribution of naked amoebae in the soils of the steppe zone of Ukraine

2020 ◽  
pp. 159-166
Author(s):  
M. Patsyuk ◽  
Keyword(s):  
Cluster Analysis ◽  
Multidimensional Scaling ◽  
Species Complex ◽  
Steppe Zone ◽  
Common Species ◽  
Molecular Clusters ◽  
The Other ◽  
Steppe Region ◽  
Species Complexes ◽  
Naked Amoebae

As a result of the study, in the steppe zone of Ukraine (Odessa, Mykolaiv, Kirovohrad region), 12 species of naked amoebas were identified, which according to the modern Eukaryot system belong to three molecular clusters Tubulinea Smirnov et al., 2005, Discosea Cavalier-Smith, 2004., Discoba Simpson and Hampl et al., 2009. This species Vahlkampfia sp. (1), Vahlkampfia sp. (2), Deuteramoeba mycophaga Page, 1988, Saccamoeba stagnicola Page, 1974, Vexillifera sp., Vannella sp. Ripellaplatypodia Smirnov, Nassonova, Chao et Cavalier-Smith, 2007, Cochliopodium sp. (1), Mayorella sp., Thecamoeba striata Penard, 1890, Stenamoeba stenopodia (Page, 1969) Smirnov et al., 2007, Acanthamoeba sp. (1). In the studied steppe soils, the most common were Vahlkampfia sp. (2), S. stenopodia, Vahlkampfia sp. (1), Vexillifera sp., Cochliopodium sp. (1); the least common – R. platypodia, D. mycophaga, T. striata, Mayorella sp. As a result of the cluster analysis, it was found that the largest share of common species is observed between Mykolaiv and Kirovograd regions (0.71) and Odessa and Kirovograd regions (0.53); the smallest is between the Odessa and Mykolaiv regions (0.43). According to the results of cluster analysis, the faunistic complexes of soil species of amoebae of the steppe region of Ukraine are united into two clusters: one of them being complexes characteristic of the Odessa region, and the other complexes of the Mykolaiv and Kirovograd regions. According to the results of nonparametric multidimensional scaling, it is established that the species complex of soil amoebae in the Kirovograd and Mykolaiv regions is determined by the increased soil temperature and acidity, compared to the Odessa region. As for moisture, this factor has little effect on the species complexes amoebae steppe region of Ukraine.

Four new species of Phrynus, Lamarck (Arachnida: Amblypygi) from Mexico

Zootaxa ◽  
2021 ◽  
Vol 4948 (2) ◽  
pp. 151-183
Author(s):  
DANIEL CHIRIVI JOYA
Keyword(s):  
New Species ◽  
Species Complex ◽  
Population Studies ◽  
The Other ◽  
Genetic Population ◽  
Male And Female ◽  
Taxonomic Information ◽  
Species Complexes ◽  
Morphologic Variation ◽  
Mexican Species

Mexico is the country with the largest diversity of the genus Phrynus (Amblypygi: Phrynidae); however, many species could remain hidden due to the conservative morphology of the group. Two of the Mexican species, P. operculatus, and P. jalisco show enough variation, between populations from different localities, to be considered as possible species complexes. The scarce taxonomic information of these species and the few analyses of their variation could cause misidentifications and sub estimation of the diversity. Specimens morphologically similar to P. operculatus from different Mexican localities were analyzed, using characters from the male and female genitals. Four new species are described, presenting illustrations of SEM for the male genitals. Details of the morphologic variation in this group of species are discussed, as well as the usefulness of sexual characters like the size proportions, and sclerotization in the female gonopods, and ornaments in males, to improve the diagnoses of the Mexican Phrynus. The known distribution of P. operculatus is large in comparison with those of the other species, after the result of this research, the possibility that it is a larger species complex is evident, thus, it is necessary to increase the morphologic and genetic population studies in this group. 

A chequered history: the taxonomy of Ficus platypoda and F. leucotricha (Moraceae: Urostigma sect. Malvanthera) unravelled

2001 ◽  
Vol 14 (4) ◽  
pp. 535 ◽  
Author(s):  
Dale J. Dixon
Keyword(s):  
New Species ◽  
Multidimensional Scaling ◽  
Species Complex ◽  
Phenetic Analysis ◽  
Morphometric Characters ◽  
Clustering Techniques ◽  
Distribution Maps ◽  
Species Complexes

A revision of the species complexes of ‘Ficus platypoda’ and ‘Ficus leucotricha’ (Moraceae: Urostigma sect. Malvanthera Corner) is presented. A phenetic analysis of morphometric characters using clustering techniques and multidimensional scaling was used to identify the taxa in each species complex. Two species from each complex are recognised and include Ficus brachypoda (Miq.) Miq. and here described Ficus atricha D.J. Dixon from the ‘F. platypoda’ complex and F. platypoda (Miq.) A. Cunn. ex Miq. and here describedFicus cerasicarpa D.J. Dixon from the ‘F. leucotricha’ complex. Each Ficus species is pollinated by a morphologically distinct pollinator wasp. Ficus platypoda is pollinated by Pleistodontes cuneatusWiebes. Ficus cerasicarpa, F. atricha and F. brachypodaare pollinated by wasps that are new species yet to be described. The nomenclature of F. brachypoda and F. platypoda is discussed and a key to the species as well as notes and distribution maps are provided for all four species.

scholarly journals Three Colletotrichum Species, Including a New Species, are Associated to Leaf Anthracnose of Rubber Tree in Hainan, China

Plant Disease ◽  
2019 ◽  
Vol 103 (1) ◽  
pp. 117-124 ◽  
Author(s):  
Xueren Cao ◽  
Xiangming Xu ◽  
Haiyan Che ◽  
Jonathan S. West ◽  
Daquan Luo
Keyword(s):  
New Species ◽  
Species Complex ◽  
Phylogenetic Analyses ◽  
Rubber Tree ◽  
The Other ◽  
Effective Control ◽  
Anthracnose Disease ◽  
Colletotrichum Species ◽  
Species Complexes ◽  
A New Species

Colletotrichum gloeosporioides and C. acutatum have been reported to be causal agents of anthracnose disease of rubber tree. Recent investigations have shown that both C. gloeosporioides and C. acutatum are species complexes. The identities of Colletotrichum species causing anthracnose disease of rubber tree in Hainan, China, are unknown. In this study, 106 isolates obtained from rubber tree with symptoms of anthracnose were collected from 12 counties of Hainan and identified at the species complex level based on the ITS sequences and colony morphologies. Seventy-four isolates were identified as C. gloeosporioides species complex and the other 32 isolates as C. acutatum species complex. Forty-two isolates were selected for further multilocus phylogenetic analyses in order to identify the isolates to the species level. Twenty-six isolates from the C. gloeosporioides species complex were characterized for partial sequences of seven gene regions (ACT, TUB2, CHS-1, GAPDH, ITS, ApMat, and GS), and the other 16 isolates from the C. acutatum species complex for five gene regions (ACT, TUB2, CHS-1, GAPDH, and ITS). Three species were identified: C. siamense and C. fructicola from the C. gloeosporioides species complex, and a new species C. wanningense from the C. acutatum species complex. Artificial inoculation of rubber tree leaves confirmed the pathogenicity of the three species. The present study improves the understanding of species causing anthracnose on rubber tree and provides useful information for the effective control of the disease.

Diversity of Naked Amoebae in Soils of Forest Areas of Zhytomyr Region (Ukraine)

Zootaxa ◽  
2020 ◽  
Vol 4743 (2) ◽  
pp. 257-265 ◽  
Author(s):  
MARINA PATSYUK
Keyword(s):  
Species Composition ◽  
Multidimensional Scaling ◽  
Species Complex ◽  
Coniferous Forests ◽  
Oak Forests ◽  
Similar Species ◽  
Acidic Soils ◽  
Mixed Forests ◽  
Naked Amoebae ◽  
Non Parametric

Here we consider the morphotypes and changing species composition of naked amoebae in soils of forest areas in Zhytomyr region (Ukraine). The species composition and morphotypes of amoebae are influenced by the microclimate of soil and litter. Complexes of naked amoebae in the study area constitute two clusters: one of broadleaf (oak) and mixed forests, another of coniferous forests. The most similar species compositions were found in soils of oak and mixed forests (64 % similarity). The least similar were amoebae complexes of coniferous forests and oak forests, and coniferous forests and mixed forests. Non-parametric multidimensional scaling (MDS) showed that species complex of amoebae of mixed forests and oak forests had moister and more acidic soils compared to coniferous forests. 

scholarly journals ESPONJAS Y CNIDARIOS (HYDROZOA Y ANTHOZOA) DEL ARRECIFE ORO VERDE; COBERTURA BENTÓNICA Y AFINIDAD FAUNÍSTICA CON SISTEMAS ARRECIFALES DE VERACRUZ, MÉXICO

2016 ◽  
Vol 31 (2) ◽  
pp. 45 ◽  
Author(s):  
VICENCIO DE LA CRUZ FRANCISCO ◽  
Ángel Eduardo Bandala-Pérez
Keyword(s):  
Species Richness ◽  
Multidimensional Scaling ◽  
Common Species ◽  
The Other ◽  
Porites Astreoides ◽  
Reef Corals ◽  
Southern Central ◽  
Montastraea Cavernosa ◽  
Low Coverage ◽  
Submerged Reefs

RESUMEN. Durante el periodo junio-agosto de 2015, se realizaron muestreos en 12 puntos geográficos del arrecife Oro Verde para explorar las porciones norte, sur, centro, este y oeste, con la finalidad de registrar especies de esponjas, hidrocorales y antozoos, así como para estimar la cobertura de algas, esponjas, corales, gorgonias y de componentes abióticos (e. g., arena y pavimento) mediante fototransectos de 50 m de longitud. Con esta información se realizaron análisis de escalamiento multidimensional no métrico (NMDS) para explicar similitudes de las unidades de muestreo. Además, se comparó la composición de esponjas y corales del arrecife Oro Verde con los demás sistemas arrecifales de Veracruz a fin de determinar afinidades mediante el método NMDS; para explicar diferencias significativas entre grupos disimiles se utilizó la prueba de similitud ANOSIM. Se registraron un total de 37 especies del Phylum Porifera y 29 especies del Phylum Cnidaria. Las especies con mayor frecuencia en el arrecife fueron las esponjas Callyspongia armigera, Niphates erecta y Amphimedon compressa, y los corales Montastraea cavernosa, Porites astreoides, Siderastrea sidérea y Colpophyllia natans. En cuanto a cobertura, las algas filamentosas y frondosas fueron las más abundantes (49.4±7.7% y 20±9.7%, respectivamente); con respecto a los corales que presentaron baja cobertura (9.5±6.1%), se identificaron principalmente M. cavernosa, C. natans y S. siderea. La riqueza faunística y la cobertura bentónica se distribuyen de manera homogénea en el arrecife, dado que los lugares de muestreo manifestaron semejanzas en estos atributos comunitarios. La composición de esponjas del arrecife Oro Verde presentó mayor afinidad con los arrecifes aledaños y con los arrecifes sumergidos del sur de Veracruz; en cambio, en cuanto a la riqueza de corales, el arrecife Oro Verde es más semejante con los arrecifes colindantes. Las discrepancias con los demás arrecifes se atribuyen a la falta de inventarios completos (e. g., Tuxpan) y/o por presentar especies con limitada distribución.Sponges and cnidarians (Hydrozoa and Anthozoa) from Oro Verde reef; benthic coverage and faunal affinity with the reef systems of Veracruz, MexicoABSTRACT. Sampling was conducted in twelve geographical points of the Oro Verde reef during the June-August 2015 period, in-order-to record species of sponges, hydrocorals and anthozoans, and to estimate the coverage of algae, sponges, corals, sea fans and abiotic components (e.g., sand and pavement) using 50 m long photo transects. We explored the northern, southern, central, eastern and western section of the reef. Analysis of non-metric multidimensional scaling (NMDS) was performed to explain similarities of the sampling units based on the information obtained. In addition, the composition of sponges and coral reefs from Oro Verde reef was compared with the other reef systems of Veracruz to determine affinities using the NMDS method. The similarity test ANOSIM was used to explain significant differences among dissimilar groups. A total of 37 species of Phylum Porifera and 29 species of Phylum Cnidaria were recorded. The most common species in the reef were the sponges Callyspongia armigera, Niphates erecta, and Amphimedon compressa, and the corals Montastraea cavernosa, Porites astreoides, Siderastrea siderea, Colpophyllia natans. Filamentous and frondose algae were the most abundant in coverage (49.4 ± 7.7% and 20 ± 9.7%, respectively), compared to reef corals that showed low coverage (9.5 ± 6.1%), which consisted mainly of M. cavernosa, C. natans and S. siderea. The faunal richness and the benthic coverage are distributed in a homogeneous way in the reef as sampling sites revealed similarities in these community attributes. The composition of sponges from Oro Verde reef presented higher affinity with the adjacent reefs and with the submerged reefs of southern of Veracruz. However, Oro Verde reef is more similar with neighboring reefs in species richness of corals. Discrepancies with the other reefs are attributed to the lack of complete inventories (e. g., Tuxpan) and / or by presenting species with limited distribution. 

scholarly journals Composition of morphotypes of naked amebae in soils of the forest-steppe zone of Ukraine

2021 ◽  
Vol 85 (2) ◽  
pp. 46-51
Author(s):  
M. Patsyuk
Keyword(s):  
Steppe Zone ◽  
The Other ◽  
Forest Steppe ◽  
Frequency Of Occurrence ◽  
Higher Temperature ◽  
Hartmannella Vermiformis ◽  
Naked Amoebae

In the soils of the forest-steppe zone of Ukraine we found 12 morphotypes of naked amoebae: eruptive (Vahlkampfa sp. (1), Vahlkampfa sp. (2), Willaertia sp.), politactic (Polychaos dubium Schaeffer, 1917, Deuteramoeba mycophaga Page, 1988), monotactic (Saccamoeba stagnicola Page, 1974, Hartmannella vermiformis Page, 1967, Cashia limacoides Page, 1974), lens-like (Cochliopodium sp. (1)), striate (Thecamoeba striata Penard, 1890, Thecamoeba similis Lepsi, 1960), rugose (Thecamoeba terricola (Greef, 1866) Lepsi, 1960), fan-shaped (Vannella sp., Ripella platypodia Smirnov, Nassonova, Chao et Cavalier-Smith, 2007), mayorellian (Mayorella viridis Leidy, 1874, Mayorella cantabrigiensis Page, 1983, Mayorella sp.), dactylopodial (Korotnevella sp. (1), Vexillifera sp.), acanthopodial (Acanthamoeba sp. (1)), branched (Rhizamoeba sp. (1)), lingualate (Stenamoeba stenopodia Page, 1969). In terms of frequency of occurrence, the most common were amoebae of eruptive (91 %), fan-shaped (82), striate (69), lens-like (62), acanthopodial (62), mayorellian (55.5 ), monotactic (53 %) morphotypes, the least common are amoeba of the politactic (24 %) morphotype. In the soils of meadows, there are no amoeba of polytactic and rugose morphotypes, in soils under shrubs – rugose and branched morphotypes. The composition of morphotypes of naked amoebas in the soils of the forest-steppe zone of Ukraine is divided into two complexes: the first complex includes amoebae from the soils of forests and shrubs, the second – from the soils of meadows. The formation of the first complex of morphotypes of amoebae is influenced by the increased humidity and higher temperature of the soils in comparison with the other complex of morphotypes of amoebas.

Statistical Analysis of Personnel Data Using Factor Scoring Cluster Analysis and Multidimensional Scaling

1973 ◽  
Author(s):  
Robert R. Read ◽  
Richard S. Elster ◽  
Gerald L. Musgrave ◽  
John W. Creighton ◽  
William H. Githens
Keyword(s):  
Cluster Analysis ◽  
Statistical Analysis ◽  
Multidimensional Scaling

scholarly journals Diversity and Community Structure of Oribatid Mites (Acari, Oribatei) at Memorial Complexes of a Megapolis

2013 ◽  
Vol 47 (4) ◽  
pp. 291-297
Author(s):  
L. A. Kolodochka ◽  
O. S. Shevchenko
Keyword(s):  
Community Structure ◽  
Species Diversity ◽  
Species Complex ◽  
Common Species ◽  
Oribatid Mites ◽  
Direct Relation ◽  
City Center ◽  
Degree Of Dominance ◽  
Different Types ◽  
The City

Abstract In different types of substrate (soil, litter, lichens and mosses) collected at three memorial complexes (cemeteries) of Kyiv (Ukraine), 70 species from 57 genera, 34 families of oribatid mites were found. A few eurytopic species capable of tolerance to different types of pollution make up an essential part in each species complex. The species diversity and complexity of oribatid community structure at researched areas increased with distance from the city center. There was no direct relation between the degree of dominance of most common species and the cemetery’s relative remoteness from the center of the city.

Sign in / Sign up

Export Citation Format

Share Document