scholarly journals Effect of Diverse Abiotic Conditions on the Structure and Biodiversity of Ichthyofauna in Small, Natural Water Bodies Located on Agricultural Lands

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2674
Author(s):  
Adam Brysiewicz ◽  
Przemysław Czerniejewski ◽  
Małgorzata Bonisławska
Keyword(s):  
Crucian Carp ◽  
Abiotic Factors ◽  
Common Knowledge ◽  
Species Abundance ◽  
Buffer Zone ◽  
Water Bodies ◽  
Agricultural Lands ◽  
Small Water ◽  
The North ◽  
K Concentration

Mid-field natural ponds promote regional biodiversity, providing alternative habitats for many valuable animal species. The study’s objective was to determine the most important abiotic factors, including hydrochemical and morphometric parameters, affecting fish occurrence in natural, small water bodies on agricultural lands. The studies were conducted in nine randomly selected water bodies located in Poland (the North European Plain). Eleven species of fish were recorded in the waterbodies, with the most abundant being cyprinids (mainly crucian carp). Canonical correspondence analysis (CCA) showed that an increase in oxygenation, temperature, amount of macrophytes, and K concentration and a decrease in the concentration of phosphates, electrical conductivity (EC), Mg, and Cl is associated with the most beneficial living conditions for the most frequently occurring species in the studied water bodies—crucian carp and tench. Aside from the hydrochemical parameters of water in the natural ponds, the number of fish correlates with the basin area and the pond area, maximum depth, area of the buffer zone surrounding the water bodies, and the number of macrophytes. This last factor also has a significant influence on the species’ abundance in the water bodies. Fish occurrences in mid-field ponds and common knowledge on their important role in the environment require taking steps to provide fish protection.

scholarly journals Abundance and annual distribution of freshwater snails and some trematode cercariae at Damietta Governorate, Egypt

2021 ◽  
Vol 58 (3) ◽  
pp. 233-247
Author(s):  
M. E. El-Zeiny ◽  
A. M. Ghoneim ◽  
O. A. Abu Samak ◽  
A. A. Khidr
Keyword(s):  
Abiotic Factors ◽  
Species Abundance ◽  
Abundant Species ◽  
Freshwater Snails ◽  
Snail Species ◽  
Chemical Parameters ◽  
Oxygen Conductivity ◽  
The North ◽  
Physico Chemical ◽  
Annual Distribution

Summary In addition to being a good food source, freshwater snails are considered one of the positively and negatively influencing invertebrates on the environment. Several biotic and abiotic factors are thought to affect the distribution and the dynamics of these snails. Freshwater snails are the most dominant and conspicuous individuals of the freshwater biota in Damietta Governorate. In this study, freshwater snails were collected monthly from 5 geographically and environmentally different sites at Damietta Governorate at the north of Egypt during June 2017-May 2018. Seven snail species; Lanistes carinatus, Lanistes varicus, Pila wernei, Segmentorbis angustus, Melanoides tuberculata, Biomphalaria alexandrina, and Gabbiella senoriansis, were identified. Lanistes carinatus was the most abundant species (56.4%) in the collection sites. Besides, Al-Inaniyyah village had the highest snail species abundance and variety. The abundance of the most recorded species varied seasonally; the highest abundance was recorded during summer while the lowest was during winter. The abundance of some snail species correlated positively or negatively with some physico-chemical parameters; water temperature, dissolved oxygen, conductivity, total dissolved salts, and electrical conductivity. Two types of trematode cercariae; gymnocephalus cercariae and xiphidiocercariae, were harvested from Lanistes carinatus. The highest prevalence of both cercarial types was detected during summer. The correlation between the prevalence of both cercarial types and the physico-chemical parameters were determined. Xiphidiocercariae were the most predominant cercarial type in Damietta Governorate. Our findings suggest that the invasion of some freshwater snails is likely to be the cause of the low prevalence or complete absence of some medically important intermediate snail hosts. We recommend further characterization of the distribution of freshwater snails and the interrelationships among them in Egypt, and suggest a controlled use of selected snail species to combat their medically important analogues.

Evenness of species abundance in the littoral communities of the Murman

2021 ◽  
pp. 38-45
Author(s):  
Svetlana V. Malavenda
Keyword(s):  
Species Diversity ◽  
Abiotic Factors ◽  
Species Abundance ◽  
Species Structure ◽  
Substrate Type ◽  
Soil Features ◽  
The North ◽  
Structure Of Communities ◽  
North Eastern ◽  
Eastern Border

The spatial and species structure of fucus algae communities in littoral phytocenoses of Eastern Murmansk is studied. This is the North-Eastern border of Fucus communities. 87 species of macrophyte algae were identified in the communities. The variation of species diversity as an indicator of community structure is determined depending on the leading abiotic factors – salinity, surf content, and substrate type. The species diversity of macrophyte algae in the littoral of the Eastern Murmansk is determined primarily by surf activity. Under similar hydrological conditions, soil features determine the density of thickets and, consequently, the number of species found in a single sample. Salinity fluctuations at which it drops below 15‰ are critical for most species and fundamentally change the structure of communities. The highest values of the indices of species diversity were observed in the littoral areas of the coast that are poorly protected from the surf.

The current state of macrozoobenthos of some small reservoirs the North Kazakhstan region

2020 ◽  
pp. 18-27
Author(s):  
L. Kovalyova
Keyword(s):  
Water Body ◽  
Stable State ◽  
Fish Farming ◽  
Water Bodies ◽  
Ecosystem Integrity ◽  
Small Water ◽  
The North ◽  
Temporary Water ◽  
Structural Variables ◽  
Small Water Bodies

Awareness of ecosystem integrity increases the relevance of collecting information on the biodiversity of water bodies of various types. The episodic nature of studies of small water bodies, along with the high variability of their hydrological, hydrochemical, and morphometric parameters, is the reason for the lack of a full assessment of the state of biota. The current paper provides information on macrozoobenthos of four small water bodies in the North Kazakhstan region. The study revealed 59 representatives with a predominance of insects in the benthofauna. Bottom complexes of shallow temporary water bodies were characterized by a wider spectrum with a greater proportion of insects relative to similar variables for lake Big Koskol. The basis was composed by species adapted to fluctuations of water availability, which led to a relatively stable state of biocenoses against the background of a significant range of quantitative characteristics of zoobenthos. More abundant development of benthic invertebrates highlighted in the lake Bolshoy Koskol (with the dominance of amphipods) and in the temporary water body T26 (with the predominance of insects). By the size of the average annual zoobenthos biomass — 29–31.5 g / m2 — the mentioned above water bodies were classified as highly productive. The level of development of benthic organisms in water bodies T20–T14, where Vermes were the leaders in biomass assessed as increased productive and moderate productive (10.3–3.1 g/m2 respectively). A low faunistic similarity of macrozoobenthos was noted, indicating the originality of the benthic complexes of the studied water body, which once again emphasizes the role of small water body in maintaining the biodiversity of the ecosystem. Relatively high structural variables of benthocenoses indicate a stable ecological state of bottom communities. The abundance of zoobenthos creates the prerequisites for the utilization of the studied and similar water bodies for organizing amateur — sport fishery and the extraction of feed used in aquarium fish farming

scholarly journals The Influence of Environmental Factors on Phytoplankton Varietya Case Study of Three Ponds of Western Poland

2020 ◽  
Vol 27 (1) ◽  
pp. 83-93
Author(s):  
Barbara Szpakowska ◽  
Dariusz Świerk ◽  
Maria Pajchrowska
Keyword(s):  
Species Richness ◽  
Environmental Variables ◽  
Abiotic Factors ◽  
Species Abundance ◽  
Phytoplankton Assemblages ◽  
Future Studies ◽  
Small Water ◽  
Chemical Composition Of Water ◽  
Research Findings

AbstractThe structure of phytoplankton assemblages in three small water bodies was compared and abiotic factors were described. It indicated considerable differences in the species abundance and biomass of the phytoplankton as well as the chemical composition of water between artificial pond (No. 2) and others. A total of 455 phytoplankton taxa were recorded. All ponds were characterized by greatest species richness of Chlorophyta. The highest biomass was noted in August-September 2015, and it was true for each pond. The CCA models showed dependences between the variables under study and phytoplankton groups. They indicated which environmental variables had the greatest influence on the biomass of phytoplankton in the waterbodies under analysis. The biomass of most of the taxonomic group in the phytoplankton (except Miozoa) depended on the presence of nitrogen not only in form of nitrates but also in the form of mineral nitrogen. The research findings suggest the trend of future studies on the phytoplankton in these ponds. The analysis of its variability should also include the influence of light and the influence of consumers on the food chain in the ecosystem.

The impact of biometric parameters of a hydromacrophyte habitat on the structure of zooplankton communities in various types of small water bodies

2009 ◽  
Vol 38 (2) ◽  
Author(s):  
Natalia Kuczyńska-Kippen ◽  
Barbara Nagengast ◽  
Tomasz Joniak
Keyword(s):  
Water Bodies ◽  
Small Water ◽  
Biometric Parameters ◽  
Zooplankton Communities ◽  
The Impact ◽  
Small Water Bodies

The impact of biometric parameters of a hydromacrophyte habitat on the structure of zooplankton communities in various types of small water bodies

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