DISTRIBUTION OF ALIEN SPECIES OF MACROZOOBENTHOS AND THE SPECIES COENOTIC COMPLEXES IN THE KAMA RESERVOIRS

2021 ◽  
Vol 14 (4) ◽  
pp. 85-96
Author(s):  
E. M. Kurina ◽  
D. G. Seleznev ◽  
N. G. Sherysheva
Keyword(s):  
Species Composition ◽  
Alien Species ◽  
Lake Baikal ◽  
Structural Characteristics ◽  
Kuibyshev Reservoir ◽  
Volga Reservoirs

The results of studies on the distribution of alien species in macrozoobenthic communities in the reservoirs of the Kama River cascade are provided. Twenty five alien species of the Ponto-Caspian and Ponto-Azov origins and 1 species - a representative of the Lake Baikal fauna - were registered. Differences in the species composition and structural characteristics of invaders of macrozoobenthos in the Kama and Volga reservoirs were shown. It was noted that mollusks of the genus Dreissena dominate in biomass in most of the studied biotopes. Three types of coenotic complexes of alien species have been identified: psammorelophilic profundal, characteristic for the Nizhnekamsk Reservoir and the Volgo-Kamsky and Kamsky reaches of the Kuibyshev Reservoir; the psammorelophilic coastal in Nizhnekamsk Reservoir; and the psammorelophilic coastal in Votkinsk and Kama reservoirs.

scholarly journals The role of reservoirs in changing the species composition of the ichthyofauna (on the example of the Kuibyshev reservoir)

2019 ◽  
Vol 288 ◽  
pp. 012058
Author(s):  
F M Shakirova ◽  
V Z Latypova ◽  
N Yu. Stepanova ◽  
V G Tereshchenko ◽  
O K Anokhina ◽  
...  
Keyword(s):  
Species Composition ◽  
Kuibyshev Reservoir

scholarly journals Biodiversity of the Ingoda River ecosystem

2022 ◽  
Vol 962 (1) ◽  
pp. 012006
Author(s):  
B B Bazarova ◽  
N A Tashlykova ◽  
E Yu Afonina ◽  
A P Kuklin ◽  
P V Matafonov ◽  
...  
Keyword(s):  
Species Composition ◽  
Alien Species ◽  
Plant Species ◽  
Elodea Canadensis ◽  
River Ecosystem ◽  
Widespread Species ◽  
Gmelinoides Fasciatus ◽  
Siberian Species

Abstract The results of a study of the biodiversity of hydrobionts in the Ingoda River are presented. In phytoplankton sixty six taxa of algae with a rank below the genus have been identified. The zooplankton contains 21 species. The species composition of the macrophytobenthos includes 5 taxa. In the flora of hydrophytes, 15 plant species have been identified. The zoobenthos contains 40 species. Our researches have been showed that widespread species prevail in the flora and fauna of hydrobionts in the Ingoda River. Two alien species (Elodea canadensis and Gmelinoides fasciatus) have been recorded in the Kenon Lake. A very rare East Siberian species of mayfly Acanthametropus nikolskyi has been recorded in the Ingoda River zoobenthos.

The structure of winter bird communities in the northern Negev shrub-steppes: Relating species composition to habitat structure

2009 ◽  
Vol 55 (1) ◽  
pp. 41-61 ◽  
Author(s):  
Ido Tsurim ◽  
Zvika Abramsky ◽  
Burt P. Kotler
Keyword(s):  
Species Diversity ◽  
Species Composition ◽  
Habitat Structure ◽  
Structural Characteristics ◽  
Spatial Scales ◽  
Bird Communities ◽  
Microhabitat Use ◽  
Bird Abundance ◽  
Shrub Steppe ◽  
Vegetation Patches

We describe the structural patterns of granivorous bird communities in a semiarid shrub-steppe during winter and examine whether and how habitat structure and productivity play roles in determining the structure of these bird communities. We used line transects and measurements of microhabitat use to describe the species diversity, species composition, and microhabitat use of the birds in semiarid shrub-steppe habitats across the northern Negev Desert, Israel. We then related those patterns to the structural characteristics of the habitats along the bird transects at two spatial scales. The bird communities in our study were not random samples of the species pool. Bird abundance and species diversity were correlated with the amount and distribution of perennial and annual vegetation; surrogates of seed abundance and habitat structure, respectively. Species assemblies across the landscape were organized in a nested-subsets structure possibly related to habitat structure. Indeed, species composition was related to the structural characteristics of the habitat. Species-specific microhabitat use was also related to habitat structure, where different species appeared to differ in their foraging location with respect to the distance from dense vegetation patches. We suggest that species first segregate at the landscape scale based on differences in habitat use. Co-occurring species are then further segregated at the microhabitat scale, probably through the partition of the space around vegetation patches. The principal effect of food appears to be limited to control of bird abundance.

Phytoplankton of the Irkutsk Reservoir as an indicator of water quality

2012 ◽  
Vol 41 (2) ◽  
Author(s):  
Galina Popovskaya ◽  
Alena Firsova ◽  
Anna Bessudova ◽  
Maria Sakirko ◽  
Alexander Suturin ◽  
...  
Keyword(s):  
Water Quality ◽  
Species Composition ◽  
Lake Baikal ◽  
Water Body ◽  
Phytoplankton Biomass ◽  
Trophic Status ◽  
Algal Species ◽  
Open Water ◽  
Chemical Parameters ◽  
Oligotrophic Water

AbstractThe species composition of phytoplankton and quantitative parameters of its abundance are indicators of ecological conditions in a water body. This paper deals with the analysis of phytoplankton in the Irkutsk Reservoir, which was formed more than 50 years ago on the Angara River flowing out of Lake Baikal. The level of phytoplankton development in the reservoir is directly dependent on the abundance of diatoms in Lake Baikal. The dominant assemblage of algal species is stable and consists mainly of diatoms, chlorophytes, and chrysophytes. Cyanobacteria are represented by a small number of species with low abundance. According to the composition of indicator species, the water in the lower reaches of the Irkutsk Reservoir can be classified as clean. The saprobity index in the open-water period is 1.2, increasing to between 1.3 and 1.5 in small bays. The values of phytoplankton biomass and chemical parameters of water recorded in 2008 indicate that the Irkutsk Reservoir is an oligotrophic water body. Its trophic status has not changed significantly since the time of impoundment (1956–1958).

An illustrated key to species of Palaemon and Palaemonetes (Crustacea: Decapoda: Caridea) from European waters, including the alien species Palaemon macrodactylus

2006 ◽  
Vol 86 (1) ◽  
pp. 93-102 ◽  
Author(s):  
Enrique González-Ortegón ◽  
José A. Cuesta
Keyword(s):  
Species Composition ◽  
Alien Species ◽  
Introduced Species ◽  
Atlantic Coast ◽  
Morphological Characters ◽  
Key To Species ◽  
European Species ◽  
Palaemon Macrodactylus

A detailed illustrated key to the identification of the European species of the genera Palaemon and Palaemonetes is provided. This key has been elaborated taking into account recent changes in the species composition of both genera for European waters, such as the invalidity of Palaemon garciacidi, which is a synonym of P. longirostris, and the presence of an introduced species, Palaemon macrodactylus that has been recently recorded at different localities along the Atlantic coast. The key is based on external morphological characters to facilitate its use by non-specialists. Data on the coloration, habitat and distribution of all species are also given.

scholarly journals The Pollutants Distribution Types in the Middle and Lower Volga Water and Bottom Sediments

2017 ◽  
Author(s):  
Keyword(s):  
Bottom Sediments ◽  
Petroleum Products ◽  
Water Area ◽  
Content Increase ◽  
Kuibyshev Reservoir ◽  
Volga River ◽  
Metal Compounds ◽  
Lower Volga ◽  
Volga Reservoirs ◽  
Iron Manganese

The outcomes of hydro/chemical and soil 1800 km long surveying of the Volga River from Kazan to Astrakhan have been analyzed. Conjugated analysis of the organic (petroleum products, phenols, and pesticides) and non-organic (metals – Cd, Co, Pb, Ni, Zn, Cr, Mn, Fe, Al) pollutants and their proportion in the Middle and Lower Volga (Kuibyshev, Saratov and Volgograd reservoirs) and unregulated part of downstream water and bottom sediments has been carried out. To test a hypothesis on the system interaction of different types of pollutants content distribution in water and bottom sediments their spatially determined comparative assessment has been applied for the first time. Three main types of the pollutants distribution within the“water-bottom sediments” system have been singled out: depositing, transit, and active/passive self-purification types. The “transit” type of metals distribution is typical for Kuibyshev reservoir. It is characterized by the higher metals concentration in water and the absence of their content increase in bottom sediments. Zones of self-purification from metal compounds have been found in water areas of Saratov and Volgograd reservoirs, while depositing zones are typical for the Volga downstream where metals accumulation in sediments have been found. A considerable portion of pesticides and petroleum products supplied to the Volga reservoirs’ ecosystems is accumulated by bottom sediments. The most part of the Middle and Lower Volga water area is a zone of active selfpurification in terms of phenol compounds. It has been shown that when the Volga environmental conditions is assessed the indicators of copper, nickel, as well as iron, manganese, cadmium and petroleum products in bottom sediments are the most informative.

scholarly journals Macrozoobenthos State in Odessa Bay Coastal Waters in 2016-2017

2019 ◽  
Keyword(s):  
Seasonal Variation ◽  
Species Composition ◽  
Coastal Waters ◽  
Benthic Invertebrates ◽  
Structural Characteristics ◽  
Taxonomic Composition ◽  
Summer Period ◽  
Standard Methods ◽  
Environment Quality ◽  
Quantitative Indicators

Purpose. Study of macrozoobenthos contemporary state in Odessa Bay coastal waters in 2016-2017. Methods. Standard methods of macrozoobenthos sampling, determination, estimation of number and biomass Results. The results of macrozoobenthos biodiversity, structural characteristics and taxonomic composition in Odessa bay coastal waters have been presented. Seasonal dynamics of its number and biomass. has been studied. Assessment of marine environment quality has been performed on the metrics of macrozoobenthos. Conclusions. Altogether 121 taxa of benthic invertebrates were identified in Odessa Bay in 2016-2017. Taxonomic composition and quantitative indicators of macrozoobenthos had clear seasonal variation with maximal development of benthos in summer period. In spring of 2016, 75 taxa of macrozoobenthos were registered in samples, in summer – 82 taxa, in autumn – 60 taxa, in summer of 2017 – 62 taxa. The basis of macrozoobenthos community was formed be mollusks (Mollusca) with domination of species М. galloprovincialis, as well as representatives of Arthropoda and Annelida. Significant input into macrozoobenthos species composition was made by representatives of the following groups: Bryozoa, Nemertea and Platyhelminthes. Contribution of Porifera, Cnidaria and Ph%

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