scholarly journals Taxonomic structure of local floras in Sidinskiy and Pribaitakskiy steppes (Krasnoyarsk region)

2019 ◽  
Vol 16 ◽  
pp. 00002
Author(s):  
Ekaterina Antipova ◽  
Olga Enulenko
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Taxonomic Structure ◽  
Central European ◽  
Krasnoyarsk Region ◽  
Full Species ◽  
Central Asian ◽  
Different Types ◽  
Sayan Mountain ◽  
Mountain Country

Sidinskiy and Pribaitakskiy steppes are the part of the Minusinsk province of the Altai-Sayan mountain country. On the territory of steppes 12 local floras (LF) were marked and examined using the same method. Studies were carried out according to the recommendations of A.I. Tolmachev (1931): identification of different types of ecotypes of LF, the full species composition of ecotypes (flora inventory), tracking the completeness of detection in LF. In the Sidinskiy steppe the number of families in the LF varies from 25 (Syida) to 43 (v. Alha), in the Pribaitakskiy steppe there is a big difference in the number of families in the LF from 31 (Krasnoyarsk reservoir, Tuba) to 65 (Mayak, Idra). The leading families in the local steppe flora are Asteraceae, Poaceae, Fabaceae. The Fabaceae family ranks third in the top of ten families in 50 % of LF, determining the type of flora as the Mediterranean-Central Asian (Fabaceae-type). Different types of LF allow to determine the type of all steppe flora as mixed, combining features of boreal (Asteraceae-Poaceae- type) and steppes flora (Fabaceae-type) with close ties with Central European floras (Rosaceae-type). 4 distinct levels of species richness are determined: 1 − 496-544; 2 − 408-413; 3 − 319-374; 4 − 279-298 species.

scholarly journals Relationship among carnivorous macrophyte Utricularia foliosa L. and species composition and life forms of periphytic algae community

2018 ◽  
Vol 30 (0) ◽  
Author(s):  
Thiago Rodrigues dos Santos ◽  
Carla Ferragut ◽  
Carlos Eduardo de Mattos Bicudo
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Life Forms ◽  
Artificial Substrate ◽  
Algal Community ◽  
Taxonomic Structure ◽  
Substrate Type ◽  
Periphytic Algae ◽  
Four Seasons ◽  
Influence Of Substrate

Abstract Aim Present study evaluated the life forms and taxonomic structure of the periphytic algae community on Utricularia foliosa L. (modified leaf and stem) and artificial substrate during the four seasons in a tropical shallow reservoir. Methods We evaluated the periphyton on natural and artificial substrate in order to evaluate the influence of substrate type on the taxonomic structure of algal community. Monospecific stands of U. foliosa were selected. Water and periphyton sampling were performed within U. foliosa stands in the autumn (April/2010), winter (July/2010), spring (November/2010) and summer (February/2011). Nylon thread was used as the artificial substrate. The community structure was evaluated through life forms, species richness, diversity and species composition. Results Species diversity was significantly different only among seasons. The life forms and species richness were different between substrate types and seasons. Entangled filamentous algae had higher biovolume in the periphyton on artificial substrate and unicellular flagellated algae had higher biovolume on natural substrate. Species composition changed among the seasons and species descriptors differed among substrates types. Species-level taxonomic classification responded clearly to the substrate type. Conclusions We concluded that the taxonomic structure and life forms of periphytic algae on artificial substrate poorly represented the natural periphyton on U. foliosa. The type of substrate strongly influenced the periphyton–Utricularia relationship.

The current state and specifics of taxonomic structure of trematodes of freshwater molluscs in the Ukrainian Polissia

Geo&Bio ◽  
2021 ◽  
Vol 2021 (20) ◽  
pp. 27-33
Author(s):  
Olena Zhytova ◽  
◽  
Eleonora Korol ◽  
Keyword(s):  
Species Composition ◽  
Original Data ◽  
Trematode Species ◽  
Taxonomic Structure ◽  
Intermediate Hosts ◽  
Freshwater Gastropods ◽  
Combined Analysis ◽  
Central European ◽  
Freshwater Molluscs ◽  
Current State

The paper presents results on the analysis of the taxonomic structure of the trematode fauna of the Ukrainian Polissia. It was found that the trematode fauna of freshwater molluscs in the Ukrainian Polissia is represented by 62 species. We supplemented the species composition of larvae of trematodes in the region with 23 species, 13 of which were first recorded in Ukraine. The results showed that the number of trematode species the definitive hosts of which are fishes have decreased. According to the obtained data, the most abundant trematode species of freshwater molluscs in the Ukrainian Polissia are those of the families Echinostomatidae, Plagiorchiidae, Diplostomidae, and Notocotylidae. The combined analysis of literature and original data revealed that in the basis of the regional trematode fauna of molluscs are species of the families Echinostomatidae (13 species) and Plagiorchiidae (10 species), which make up almost one-third of the total number of trematode larvae detected. A quite large portion of larvae belong to species of the families Notocotylidae (8 species), Strigeidae (7 species), Diplostomidae (5 species), and Haematolechidae (5 species). Most families (Diplodiscidae, Opisthorchiidae, Leucochloridiomorphidae, Prostogonimidae, Cathaemasiidae, Cyclocoelidae, Prohemistomatidae, and others) are represented only by 1–2 species. In freshwater molluscs of the studied region, we have found only 38 % of trematode species recorded in definitive hosts. Species found in vertebrate animals of the region potentially can also occur in intermediate hosts, but most of these species parasitize in birds that could be infected in other areas. When comparing the taxonomic structure of the trematode fauna of the Polissia with other well-studied regions of Ukraine (Northern Pryazovia and Crimea), some specifics were noted between them. In particular, it was found that the most abundant trematode species in the region as well as in the whole of Ukraine are those of the families Echinostomatidae, Plagiorchiidae, Diplostomidae, Notocotylidae, and Strigeidae. The obtained data allow considering that the trematode fauna of freshwater gastropods of the Ukrainian Polissia is an integral part of the Central European fauna of trematodes.

Ecological characteristics of the composition of diatoms of benthic algocenoses in the mouth of the Oka River

2021 ◽  
pp. 131-133
Author(s):  
Khediaria Tabet
Keyword(s):  
Species Composition ◽  
Rare Species ◽  
Ecological Indicators ◽  
Taxonomic Structure ◽  
Ecological Characteristics ◽  
Physicochemical Conditions ◽  
Complex Organization ◽  
Different Types ◽  
Similarities And Differences ◽  
The Right

A brief description of the species composition, taxonomic structure and ecological indicators of diatoms on the right bank of the mouth section of a large eutrophic – hypertrophic river is given. The similarities and differences in taxonomic structure, a set of common and rare species of diatoms in different types of benthal communities with a more complex organization of the epilithon are shown. Satisfactory correspondence between the assessment of the composition of benthic Bacillariophyta and the physicochemical conditions of their habitat has been demonstrated.

scholarly journals Distribuição de Heteroptera Aquáticos (Insecta) em Diferentes Tipos de Substratos de Córregos do Cerrado Matogrossense

2013 ◽  
Vol 6 (2) ◽  
pp. 132-140 ◽  
Author(s):  
Karina Dias-Silva ◽  
Helena Soares Ramos Cabette ◽  
Núbia França da Silva Giehl ◽  
Leandro Juen
Keyword(s):  
Surface Tension ◽  
Species Richness ◽  
Species Composition ◽  
Leaf Litter ◽  
Water Surface ◽  
Mato Grosso ◽  
Surface Samples ◽  
Inorganic Substrates ◽  
Different Types ◽  
Para Determinar

A comunidade de Heteroptera de córregos do cerrado do Leste Matogrossense foi analisada para determinar os tipos de substratos que contemplam a maior variação de composição de espécies. Foram realizadas coletas nos substratos de folhiço de corredeira e remanso, raiz, cascalho, pedra (matacão), areia e na superfície d’água (camada de tensão superficial) das nascentes, trechos médios e foz dos córregos Santo Antônio e Colher em dezembro/2004 e julho/2005, com cada substrato representado por seis subamostras. Foram coletados 333 indivíduos distribuídos em 11 famílias, 20 gêneros e 30 morfoespécies (17 Nepomorpha e 13 Gerromorpha), sendo os Gerromorpha mais abundantes (172 indivíduos). A riqueza estimada de Gerromorpha nos substratos foi superior em coletas na superfície d’água, enquanto Nepomorpha apresentou maior riqueza em raiz, seguido por cascalho e folhiço de corredeira. Os substratos inorgânicos (pedra e areia) apresentaram reduzida riqueza de Heteroptera. Entre os Gerromorpha, Limnogonus aduncus aduncus Drake & Harris, Rhagovelia elegans Uhler, Neogerris lubricus White e Brachymetra sp.1 foram associados com coletas de superfície e Stridulivelia anta Polhemus & Spangler com substrato raiz. Em Nepomorpha, Martarega chinai Hynes foi associado com coletas de superfície, enquanto que Ambrysus sp. 1 mostrou associação ao folhiço de corredeira, de remanso, raiz e superfície. Com esses resultados ressaltamos que trabalhos que visem levantamentos rápidos da comunidade de Heteroptera devem priorizar coletas de superfície para Gerromorpha e de raiz para Nepomorpha, pois esses substratos abrigam as maiores riquezas de cada infraordem, contemplando 83% e 64% da riqueza de espécie desses grupos respectivamente. Distribution of Aquatic Heteroptera (Insecta) From Different Types of Streams Substrate of Cerrado in Mato Grosso Abstract. The Heteroptera community of Cerrado streams in east of Mato Grosso was analyzed to determine the types of substrate that contemplate the largest variation in species composition. Samples were performed in the leaf litter substrates from rapids and backwaters, root, gravel, stone (boulder), sand and on the water surface (surface tension layer) of springs, mean stretches and mouths of the Santo Antônio and Colher streams on December/2004 and July/2005, with six subsamples each substrate. Were collected 333 specimens distributed in 11 families, 20 genus and 30 morphospecies (17 Nepomorpha and 13 Gerromorpha), being Gerromorpha the most abundant (172 specimens). The estimated richness of Gerromorpha in the substrates was higher in samples from water surface, while Nepomorpha showed higher richness in root, followed by gravel and leaf litter from rapids. The inorganic substrates (stone and sand) showed lower richness of Heteroptera. Among Gerromorpha, Limnogonus aduncus aduncus Drake & Harris, Rhagovelia elegans Uhler, Neogerris lubricus White and Brachymetra sp.1 were associated to surface samples and Stridulivelia anta Polhemus & Spangler to root substrate. In Nepomorpha, Martarega chinai Hynes was associated to surface samples, while Ambrysus sp. 1 showed association to leaf litter from rapids, backwaters, root and surface. The results suggest that studies which aim for rapid surveys of Heteroptera community should prioritize surface samples for Gerromorpha and root samples for Nepomorpha, because these substrates shelter the greatest richness of each infra-order, contemplating 83% and 64% of species richness in these groups respectively.

Revision flora of makrofytes of the aquatory of the Kazantip Nature Reserve

2019 ◽  
pp. 61-72
Author(s):  
T. V. Belich ◽  
S. Ye. Sadogurskiy ◽  
S. A. Sadogurskaya
Keyword(s):  
Species Composition ◽  
Nature Reserve ◽  
Taxonomic Revision ◽  
Warm Water ◽  
Taxonomic Structure ◽  
Marine Macrophytes

The results of nomenclature-taxonomic revision of the flora marine macrophytes of the Kazantip Nature Reserve (KNR) are presented. Currently, with the new data the species composition includes 73 species and intraspecific taxon (IST) of macroalgae and sea grasses. Taxonomic structure of flora of the macrophytes of the KNR includes 4 phylums, 7 classes, 19 orders, 28 families, (F), 37 genera. Chlorophyta - 33 species, Ochrophyta - 11, Rhodophyta - 25, Tracheophyta - 4. In the flora prevail mesosaprobic (44%), annuae (58%), brackish-sea (51%), warm-water (40%) species. The category of rare fraction includes 14 species.

scholarly journals Disentangling the Ecological Determinants of Species and Functional Trait Diversity in Herb-Layer Plant Communities in European Temperate Forests

Forests ◽  
2021 ◽  
Vol 12 (5) ◽  
pp. 552
Author(s):  
Janez Kermavnar ◽  
Lado Kutnar ◽  
Aleksander Marinšek
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Plant Communities ◽  
Functional Trait ◽  
Forest Stand ◽  
Relative Importance ◽  
Herb Layer ◽  
Bud Bank ◽  
Tree Species Composition ◽  
Stand Characteristics

Forest herb-layer vegetation responds sensitively to environmental conditions. This paper compares drivers of both taxonomic, i.e., species richness, cover and evenness, and functional herb-layer diversity, i.e., the diversity of clonal, bud bank and leaf-height-seed plant traits. We investigated the dependence of herb-layer diversity on ecological determinants related to soil properties, climatic parameters, forest stand characteristics, and topographic and abiotic and biotic factors associated with forest floor structure. The study was conducted in different forest types in Slovenia, using vegetation and environmental data from 50 monitoring plots (400 m2 each) belonging to the ICP Forests Level I and II network. The main objective was to first identify significant ecological predictors and then quantify their relative importance. Species richness was strongly determined by forest stand characteristics, such as richness of the shrub layer, tree layer shade-casting ability as a proxy for light availability and tree species composition. It showed a clear positive relation to soil pH. Variation in herb-layer cover was also best explained by forest stand characteristics and, to a lesser extent, by structural factors such as moss cover. Species evenness was associated with tree species composition, shrub layer cover and soil pH. Various ecological determinants were decisive for the diversity of below-ground traits, i.e., clonal and bud bank traits. For these two trait groups we observed a substantial climatic signal that was completely absent for taxonomy-based measures of diversity. In contrast, above-ground leaf-height-seed (LHS) traits were driven exclusively by soil reaction and nitrogen availability. In synthesis, local stand characteristics and soil properties acted as the main controlling factors for both species and trait diversity in herb-layer communities across Slovenia, confirming many previous studies. Our findings suggest that the taxonomic and functional facets of herb-layer vegetation are mainly influenced by a similar set of ecological determinants. However, their relative importance varies among individual taxonomy- and functional trait-based diversity measures. Integrating multi-faceted approaches can provide complementary information on patterns of herb-layer diversity in European forest plant communities.

Species Composition and Species Richness in the Hetao Irrigation Region Drainage Ditches, Northern China

2013 ◽  
Vol 27 (2) ◽  
pp. 167-177 ◽  
Author(s):  
Yang Zhao ◽  
Xin-rong Li ◽  
Zhi-shan Zhang ◽  
Yi-gang Hu ◽  
Pan Wu
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Northern China ◽  
Drainage Ditches

scholarly journals Composition and diversity of anurans in the Restinga of the Conde municipality, northern coast of the state of Bahia, northeastern Brazil

2016 ◽  
Vol 16 (3) ◽  
Author(s):  
Felipe Augusto Trindade Gondim-Silva ◽  
Alessandra Rodrigues Santos Andrade ◽  
Rafael Oliveira Abreu ◽  
Jamile Santos Nascimento ◽  
Geovane Paixão Corrêa ◽  
...  
Keyword(s):  
Species Richness ◽  
Species Diversity ◽  
Species Composition ◽  
Rainy Season ◽  
Dominant Species ◽  
The State ◽  
Northeastern Brazil ◽  
Freshwater Wetland ◽  
Northern Coast ◽  
Anuran Species

Abstract The Conde municipality is located in the northern coast of the state of Bahia (NC), northeastern Brazil, and is part of the Atlantic Tropical domain. The anuran fauna of the northern portion of the NC is still poorly known if compared to the southern portion. The Restinga is one of the predominant environments of the coastal plains of the NC and it is characterized essentially by presenting sandy soil covered by herbaceous and shrubby vegetation. The objective of this study was to determine the anuran species composition and diversity for the Restinga of the Conde municipality. Sampling was carried out at night by active search over four periods of five consecutive days each, two over the 'main rainy season' and two in a 'lesser rainy season', using 14 sample units (SUs) and five extra sample plots (EPs). We calculated dominance and species diversity using the Berger-Parker and Shannon-Wiener H' indices, respectively. We used accumulation curves and the Jackknife 1 estimator to estimate anuran species richness, considering only the data obtained from the SUs. We recorded 713 anuran specimens distributed within 33 species, 13 genera and five families (Bufonidae, Craugastoridae, Hylidae, Leptodactylidae and Microhylidae). The Hylidae and Leptodactylidae families had the highest species richness. Considering only the SUs (Jackknife 1 estimator in brackets), we recorded 28 species in the study area (33.9 ± 2.3), 13 in Shrubby Vegetation Zones - SVZ (20.8 ± 2.9) and 25 in Freshwater Wetland Zones - FWZ (28.9 ± 1.9). The abundance and species diversity of the FWZ (n = 638 specimens; H'= 2.4) were higher than those recorded for the SVZ (n = 52 specimens; H' = 1.9). The SVZ and FWZ showed distinct dominant species, wherein Pristimantis paulodutrai was the dominant species in SVZ and Scinax fuscomarginatus in FWZ. The Restinga of the Conde municipality stands out as the one with the highest anuran species richness already recorded considering only SVZ and FWZ. Moreover, its anuran species composition represented 55% of the anuran species known for the NC and included taxa common to three different morphoclimatic domains (Tropical Atlantic, Cerrado and Caatinga).

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