scholarly journals Microalgae of Protected Lakes of Northwestern Ukraine

2017 ◽  
Vol 62 (1) ◽  
pp. 61-76 ◽  
Author(s):  
Yuriy Malakhov ◽  
Olha Kryvosheia ◽  
Petro Tsarenko
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Algal Species ◽  
Ecological Network ◽  
Phytoplankton Assemblages ◽  
Number Of Species ◽  
Microalgal Species ◽  
Bile Lake ◽  
Comprehensive Study

AbstractThe paper reports the first comprehensive study of microalgal species composition in four lakes of Volhynian Polissya (northwestern Ukraine), in which 271 species (279 intraspecific taxa) of 11 microalgal phyla were identified. Four dominant phytoplankton assemblages were determined for each lake. Bacillariophyta and Charophyta formed more than half (59.2%) of the taxonomic list, accounting for 94 and 66 species respectively. Desmidiaceae was the most diverse family, with 44 species (47 intraspecific taxa) of microalgae. The four lakes are highly dissimilar in species richness and composition, having only 8 (2.9%) species in common. Lake Cheremske had the highest number of algal species – 137 (144). Lake Bile, Lake Somyne and Lake Redychi were much less diverse, with 105, 79 (80) and 75 (78) species respectively. Morphological descriptions, original micrographies and figures are presented for a number of species, including some not previously documented in Ukraine: Chromulina cf. verrucosa G. A. Klebs, Eunotia myrmica Lange-Bert. and E. tetraodon Ehrenb. The lakes, which are almost pristine or are recovering, maintain diverse and valuable algal floras, making them important sites in the Pan-European ecological network.

Organisation de la richesse et de la composition floristiques d'îles de la Méditerranée occidentale (sud-est de la France)

1998 ◽  
Vol 76 (2) ◽  
pp. 321-331 ◽  
Author(s):  
Frédéric Médail ◽  
Éric Vidal
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Plant Species ◽  
Habitat Diversity ◽  
Mediterranean Islands ◽  
Plant Dispersal ◽  
Number Of Species ◽  
Continental Islands ◽  
Species Area ◽  
Species Area Relationship

The effects of physiographic variables (area, isolation, elevation, and substrate) and habitat diversity on plant species richness and composition have been investigated on some Mediterranean islands (southeastern France). The number of species - area relationship is significant but there are more diverse vegetation patterns on smallest islands (area smaller than 3.5 ha and, ultimately, 0.2 ha). Although the species composition is positively correlated to the distance from the continent, the effect of isolation is not so obvious because of the small distance of these continental islands from the continent. Some islands nearest to shore show very different plant species composition, suggesting a nonselective plant dispersal through some narrow stretches of sea. Habitat diversity represents one of the major explanatory factors of the species richness; nevertheless, it is not possible to settle between the two hypotheses effect of habitat diversity versus effect of area per se because of the correlation between the two factors. Key words: Mediterranean islands, insular biogeography, number of species - area relationship, isolation, habitat diversity, islets.

scholarly journals Species composition of aquatic invertebrates of the Viliya River

2018 ◽  
Vol 63 (4) ◽  
pp. 401-408 ◽  
Author(s):  
M. D. Moroz ◽  
V. M. Baichorov ◽  
Yu. G. Hihiniak
Keyword(s):  
Water Quality ◽  
Species Richness ◽  
Species Composition ◽  
Aquatic Invertebrates ◽  
High Water ◽  
Wastewater Discharge ◽  
Aquatic Animals ◽  
Number Of Species ◽  
The Town

The results of studies of macrozoobenthos and pleustonic aquatic invertebrates complexes  of the Viliya River have been considered in the article. 92 species and forms related to 3 types of aquatic animals which are Mollusca – 15 species and forms; Annelida – 2 and Arthropoda –75 have been detected. The analysis of the species composition has shown in all studied sites that the species richness was within the range of 29–30 species. At the place of wastewater discharge from the town of Vileika, a species richness decrease and the number of Diptera and Oligochaeta increase has been observed. The relatively high number of species with rheophilic and oxyphilic properties such as representatives of the Plecoptera, Ephemeroptera, and Trichoptera orders groups indicates a fairly high water quality in the investigated sites of the Viliya River. Rare and protected for Belarus and Europe.species have been found.

scholarly journals SPECIES COMPOSITION OF FISH FAUNA IN THE COASTAL WATERS OF QUANG NGAI PROVINCE

2018 ◽  
Vol 18 (2) ◽  
pp. 166-177
Author(s):  
Le Thi Thu Thao ◽  
Vo Van Quang ◽  
Nguyen Phi Uy Vu
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Coastal Waters ◽  
Similarity Index ◽  
Fish Fauna ◽  
Sampling Location ◽  
Number Of Species ◽  
Central Vietnam ◽  
Group 2 ◽  
Group 1

Three surveys were carried out in May, August and December 2014 at 7 sampling location to determine species composition of fish fauna in the coastal waters of Quang Ngai province (the Central Vietnam). A total number of 178 species of fishes were identified belonging to 125 genera, 68 families and 13 orders. Analysis of community structure of fish fauna showed that Perciformes order was the most popular, making up 71.9%; Tetraodontiformes (8.4%); Pleuronectiformes (5.6%). Serranidae family was the most abundant with 14 species, making up 7.9% of the total number of species; Carangidae: 12 species (6.7%); Lutjanidae, Gobiidae had the same number of species with 9 species (5.1%); Scombridae: 7 species (3.9%); Soleidae: 6 species (3.4%); Haemulidae, Mullidae, Tetraodontidae: 5 species (2.8%);... Cluster analysing based on the Bray-Curtis similarity index of nine fish faunas (Thai Binh, Son Tra, Thu Bon, Quang Nam, Nha Phu-Binh Cang, Ben Tre and Tra Vinh) showed that fish composition of the coastal estuaries of Tra Vinh and Ben Tre had the highest similarity (80%), subsequently fish fauna of Quang Ngai had similarity with that of Nha Phu-Binh Cang (39%), Quang Ngai and Quang Nam (42%), Quang Nam and Nha Phu-Binh Cang (41%), Quang Nam and Son Tra (38%), Thai Binh and Ben Tre (37%), Quang Ngai and Son Tra (36%). The result was also classified into two distinct groups of 7 fish faunas: Group 1-Tra Vinh, Ben Tre and Thai Binh; group 2-Quang Ngai, Quang Nam, Nha Phu-Binh Cang and Son Tra. The species richness (Margalef’s index) of Quang Ngai (34.2) was less abundant than other areas, the highest species richness belonged to Tra Vinh (38.2), Thai Binh (38.0), Quang Nam (37.8), Nha Phu-Binh Cang (35.1), Son Tra (30.9), Ben Tre (29.4). The diversity of species composition according to the level taxa in each region showed the characteristic of each fish fauna.

scholarly journals Ant Communities Resist Even in Small and Isolated Gypsum Habitat Remnants in a Mediterranean Agroecosystem

2021 ◽  
Vol 9 ◽  
Author(s):  
Francisco M. Azcárate ◽  
Aitor Alameda-Martín ◽  
Adrián Escudero ◽  
Ana M. Sánchez
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Natural Habitat ◽  
Agricultural Practices ◽  
Species Density ◽  
Ecosystem Functions ◽  
Ecological Role ◽  
Ant Communities ◽  
Number Of Species ◽  
Management Plans

Natural and seminatural habitat remnants play a crucial ecological role in intensified agroecosystems. Assumptions on the conservation value of small and poorly connected fragments in a hostile matrix come from generalization obtained from a limited number of taxa, mostly plants, and vertebrates. To date, few studies have analyzed the effect of fragmentation on ant communities in Mediterranean agroecosystems, despite the importance of this group of animals on several key ecosystem functions and services. Here, we analyze the effects of fragment area and connectivity on ant communities in gypsum outcrops in a large cereal agroecosystem of Central Spain. Ant communities were described by their species composition, abundance (total number of occurrences), and number of species, standardized both by area (species density), and abundance (species richness). Observed number of species was relatively high in comparison with other studies in the Mediterranean, and we found no effects of fragment characteristics on species density, species richness and species composition, which implies that even small and isolated patches do have a value for ant conservation. Moreover, total number of occurrences were higher for smaller and more isolated fragments. This finding contrasts with the results reported for other taxa in similar gypsum habitats and suggests that certain ant traits and strategies make them particularly resistant to fragmentation and capable to take advantage of small habitat patches. Given the important ecological role played by ants, we recommend the preservation of these small habitat fragments in the management plans of agroecosystems in these drylands, especially in those cases in which intensification of agricultural practices greatly diminish natural habitat availability.

scholarly journals Herpetofauna of Stara Zagora, Southern Bulgaria: Species composition and distribution along the natural habitat-urban areas gradient

2018 ◽  
Vol 16 (4) ◽  
pp. 270-274
Author(s):  
Dian Georgiev ◽  
Dilian Georgiev
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Urban Area ◽  
Urban Areas ◽  
Central City ◽  
Natural Habitat ◽  
Residential Areas ◽  
Number Of Species ◽  
Crop Farming ◽  
Species Composition And Distribution

Herpetofauna of Stara Zagora city is characterized by exceptional species richness. In the this urban area and its adjacent territories, twenty-nine species from 13 families and four orders of class Amphibia and class Reptilia were found. From all species encountered in the studied region, 21 were established in suburban zones. Ten species were registered in residential areas and their adjacent territories, and 18 species – in city parks. An obvious increase in number of species and their spread to the peripheral and central city areas was observed. The least number of species (5 sp.) was observed in construction areas, areas of intensive crop farming (6 sp.) and around administrative buildings (6 sp.).

scholarly journals The ecological structure of the bryoflora of Wroclaw's parks and cemeteries in relation to their localization and origin

2014 ◽  
Vol 70 (3) ◽  
pp. 229-235 ◽  
Author(s):  
Ewa Fudali
Keyword(s):  
Species Richness ◽  
Species Composition ◽  
Rural Areas ◽  
Ecological Structure ◽  
Number Of Species ◽  
Set Up ◽  
The Town ◽  
Dicranum Scoparium ◽  
General Estimation ◽  
Meadow Species

The ecological structure of the flora of 81 bryophytes found in 22 town parks and 6 cemeteries situated within the borders of the Wrocław town has been analyzed in relation to the localization of objects (within the center of the town and its suburbs) and their origin (parks set up in the place of ruins, those built on the site of old cemeteries, objects established within former forests, and parks set up in open, previously rural areas, often as gardens of mansions). In general estimation, the bryoflora of parks and cemeteries appears to be rather ecologically highly specializated - more than 50% of species occurred only on one type of substratum. Epiphytes s.s. occurred rarely. More often bryophytes were noted at the bases and on the trunks of trees, up to 30 cm. Some of the mosses, described in literature as epiphytes, have adapted to terrestrial-epiphytic sites and have been found only at the base of trees. In parks, epigeits were found in abundance on the ground around the base of trees and in shaded lawns. The presence of specialized epixylics was insignificant, although some of the typical forest epixylics were noted, namely <em>Aulacomnium androgynum</em>, <em>Herzogiella seligeri</em> and <em>Dicranum scoparium</em>. However, only parks situated in the suburbs show a high ecological variety of bryoflora, while objects established within the center of the town do not differ in species composition of bryophytes from surrounding built-up areas, despite their origin. Only in the parks situated in the suburbs there was a pronounced presence of forest and meadow species. The factor of park's origin seems to influence the bryoflora's ecological structure and the species richness on objects situated in the suburbs. In the cemeteries a positive correlation between the high number of species, age of monuments and the dimensions of object areas was stated.

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.

scholarly journals Diversity of Algae and Cyanobacteria and Bioindication Characteristics of the Alpine Lake Nesamovyte (Eastern Carpathians, Ukraine) from 100 Years Ago to the Present

Diversity ◽  
2021 ◽  
Vol 13 (6) ◽  
pp. 256
Author(s):  
Petro M. Tsarenko ◽  
Olena P. Bilous ◽  
Olha M. Kryvosheia-Zakharova ◽  
Halyna H. Lilitska ◽  
Sophia Barinova
Keyword(s):  
Species Composition ◽  
Structural Changes ◽  
Algal Species ◽  
Taxonomic Composition ◽  
Alpine Lake ◽  
Algal Flora ◽  
Ecological Analysis ◽  
Modern Species ◽  
Eastern Carpathians ◽  
Infraspecific Taxa

The species diversity and changes in the structural dynamics of the algal flora from the alpine lake Nesamovyte has been studied for 100 years. During the period of investigations, 234 species (245 infraspecific taxa) were revealed to cover more than 70% of the modern species composition of the studied lake. The modern biodiversity of algae is characterized by an increase in the number of widespread forms, a change from the baseline “montane” complex in comparison to the beginning of the 20th century. Nevertheless, the Nesamovyte Lake still has a unique algae composition that is typical for high-mountainous European lakes. The presence of a different complex of conventionally arctic species of algae, in particular, diatoms is discussed. Structural changes in the taxonomic composition of the algal flora of the lake as well as in the complex of the leading genera, species and their diversity are revealed. An ecological analysis of the algal species composition of the lake showed vulnerability and degradation to the ecosystem of the lake. On this basis, the issue regarding the question of protection and preservation of the algae significance and uniqueness of the flora of algae in the Nesamovyte Lake are discussed.

scholarly journals The hypoxia that developed in a microtidal estuary following an extreme storm produced dramatic changes in the benthos

2016 ◽  
Vol 67 (3) ◽  
pp. 327 ◽  
Author(s):  
James R. Tweedley ◽  
Chris S. Hallett ◽  
Richard M. Warwick ◽  
K. Robert Clarke ◽  
Ian C. Potter
Keyword(s):  
Species Composition ◽  
Environmental Stress ◽  
Benthic Macroinvertebrates ◽  
Total Density ◽  
Taxonomic Distinctness ◽  
Residence Times ◽  
Number Of Species ◽  
Environmental Perturbations ◽  
Extreme Storm ◽  
Evenness Index

Runoff from an extreme storm on 22 March 2010 led, during the next 3 months, to the formation of a pronounced halocline and underlying hypoxia in the upper reaches of the microtidal Swan–Canning Estuary. Benthic macroinvertebrates were sampled between January 2010 and October 2011 at five sites along 10km of this region. By mid-April, the number of species, total density, Simpson’s evenness index and taxonomic distinctness had declined markedly, crustaceans had disappeared and the densities of annelids and molluscs had declined slightly. These faunal attributes (except Simpson’s index) and species composition did not recover until after the end of the hypoxia. The survival of annelids and loss of crustaceans in this period reflects different sensitivities of these taxa to severe environmental stress. The results emphasise that microtidal estuaries with long residence times are highly vulnerable to the effects of environmental perturbations, particularly during warmer periods of the year.

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