scholarly journals Diversity and dynamics of hydrophilic flora of Lowland Polissya (on the example of the Sluch River basin)

2021 ◽  
Vol 29 (3) ◽  
pp. 303-310
Author(s):  
Y. Grokhovska ◽  
V. Volodymyrets ◽  
S. Konontsev
Keyword(s):  
Alien Species ◽  
River Basin ◽  
Rare Species ◽  
Freshwater Ecosystems ◽  
Environmental Research ◽  
Anthropogenic Activity ◽  
Acorus Calamus ◽  
Nymphoides Peltata ◽  
Bidens Frondosa ◽  
Flora Diversity

Study and analysis of hydrophilic flora diversity are important parts of environmental research due to various functions of vascular macrophytes in freshwater ecosystems, which deteriorate under the influence of anthropogenic activity and climate change. The aim of this study is to analyze the hydrophilic flora diversity (taxa, biology, ecology, and conservation status of species) and current population trends in the Sluch River basin, the largest tributary of the Horyn River (the Pripyat River basin), within the Polissya Lowland in the northern-west region of Ukraine. The list of hydrophilic flora is based on materials of the authors’ field researches in 2014–2020 within the upper and middle parts of the river basin, herbarium materials, and archive data. The study shows that the natural flora consists at least of 105 species of vascular plants belonging to 66 genera, 36 families, and 22 orders. Structural analysis shows the predominance of a few families in the systematic structure of the flora (Cyperaceae, Potamogetonaceae, Poaceae, Ranunculaceae, Plantaginaceae, and Typhaceae) and genera (Potamogeton, Carex); the dominant categories are hemicryptophytes and geophytes, entomophiles and anemophiles, heliophytes and hygrohelophytes. C- and S-strategists are dominant. This is the generally typical taxonomic and ecological structure of the hydrophilic flora of water bodies in the Pripyat River basin. The list of rare species includes 20 species from 15 genera and 12 families, for instance, species listed as vulnerable in The Red Book of Ukraine (Juncus bulbosus, Utricularia intermedia, Nymphoides peltata). Even rare and vulnerable species can form numerous populations in some localities, for example, Nymphoides peltata and Calla palustris. Five alien species were identified (Acorus calamus, Elodea canadensis, Zizania latifolia, Bidens frondosa, and Echinocystis lobata), some of which tend to expand and displace aboriginal species. In the future, it will be important to further study the structure and changes in the hydrophilic flora of the region under conditions of anthropogenic impact, to monitor the dynamics of populations of alien species, and to develop conservation measures for rare species and communities.

scholarly journals Assessments of Bacterial Community Shifts in Sediments along the Headwaters of São Francisco River, Brazil

Conservation ◽  
2021 ◽  
Vol 1 (2) ◽  
pp. 91-105
Author(s):  
Marcos de Paula ◽  
Thiago Augusto Costa Costa Silva ◽  
Amanda Soriano Araújo ◽  
Gustavo Augusto Lacorte
Keyword(s):  
Bacterial Community ◽  
River Basin ◽  
High Intensity ◽  
Bacterial Communities ◽  
Anthropogenic Activities ◽  
Freshwater Ecosystems ◽  
Community Diversity ◽  
Anthropogenic Activity ◽  
Sao Francisco River ◽  
São Francisco River

Sustainable use of freshwater resources for human civilization needs requires the assessment and monitoring of freshwater health, and bacterial communities from riverbed sediments have been shown to be susceptible to chronic anthropogenic disturbances in freshwater ecosystems. Here, we took advantage of the occurrence of well-recognized adjacent sections from the Upper São Francisco River basin with well-recognized levels of anthropogenic activity intensity to test the applicability of sediment bacterial communities as bioindicators of impacts on freshwater ecosystems. We applied 16S amplicon sequencing to estimate the diversity and composition of bacterial communities from 12 sampling sites across the Upper São Francisco River basin, classified as being of no, low, or high intensity of anthropogenic activities, and used diversity metrics and LEfSe to compare the patterns of community structure. Our results revealed that accessed sediment environments associated with land areas with a high intensity of anthropogenic activities presented the lowest levels of community diversity, and the bacterial community compositions of these environments were significantly different from the other sampled areas. Our findings can be considered a source of evidence for the usefulness of bacterial community-based approaches as a tool for diagnosis and monitoring of ecosystem health in areas of vulnerable freshwater environments, and can even be incorporated into regular water quality programs.

To morphology, ecology and distribution of rare species Sellaphora hustedtii (Krasske) Lange-Bertalot et Werum (Bacillariophyta) from waterbodies of the Gydan Peninsula

2014 ◽  
Vol 48 ◽  
pp. 57-65 ◽  
Author(s):  
S. I. Genkal ◽  
M. I. Jarushina
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
River Basin ◽  
Rare Species ◽  
Western Siberia ◽  
Microscopy Study ◽  
Electron Microscopy Study ◽  
Diagnostic Features ◽  
Scanning Electron Microscopy Study ◽  
Scanning Electron

A rare species Sellaphora hustedtii, which is also new for the flora of Russia, has been found in waterbodies of the Messoyakha River basin (south-western part of the Gydan Peninsula, Western Siberia). The scanning electron microscopy study revealed variability of the main quantitative and qualitative diagnostic features of the species (length and width of the valve, number of striae and areolae in 10 μm, shape of the valve and structure of the raphe). New data on the ecology and distribution of the species allowed us to specify its diagnosis.

scholarly journals How to Protect Free Flowing Rivers: The Bita River Ramsar Site as an Example of Science and Management Tools Working Together

2021 ◽  
Vol 13 (4) ◽  
pp. 1775
Author(s):  
Cesar Freddy Suárez ◽  
Monica Paez-Vasquez ◽  
Fernando Trujillo ◽  
Jose Saulo Usma ◽  
Michele Thieme ◽  
...  
Keyword(s):  
River Basin ◽  
Good Health ◽  
Freshwater Ecosystems ◽  
Civil Society Organizations ◽  
High Plains ◽  
Ramsar Site ◽  
Economic Activities ◽  
Management Tools ◽  
Conservation Area ◽  
Local Stakeholder

The Orinoco river basin is the third largest river in the world by volume. Its catchment encompasses 27 major sub-basins including the Bita with a catchment area of about 825,000 ha, which originates in the Colombian high plains in the Llanos ecoregion. It has been recognized as a priority area for conservation through different gap analyses and overall determined to have good health according to the Orinoco report card 2016. The natural climate and hydrologic processes, and their synergies with flooded forests, savannas, wetlands, species diversity and local economic activities, are part of a dynamic and sensitive system. With the purpose of conserving the ecological, social and cultural benefits that it brings, the Colombian Government, with the support of regional and local civil society organizations, promoted the designation of a conservation area. Technical exercises were carried out including biological and socioeconomic surveys, local stakeholder consultations and future scenario modeling. In June 2018, the Bita River basin was designated as the largest Ramsar site in Colombia, providing a worldwide example of explicit protection of riverine systems. In order to maintain this free-flowing river, land use and fisheries management, in conjunction with other conservation actions, are being implemented and provide a model of protection for freshwater ecosystems that could be replicated elsewhere.

A novel application of an adaptive surrogate-based modeling optimization (ASMO) for the Community Territory System Model (CTSM) in Alaska

2021 ◽  
Author(s):  
Yifan Cheng ◽  
Andrew Newman ◽  
Sean Swenson ◽  
David Lawrence ◽  
Anthony Craig ◽  
...  
Keyword(s):  
High Resolution ◽  
River Basin ◽  
Land Surface ◽  
Computational Cost ◽  
Reanalysis Data ◽  
Freshwater Ecosystems ◽  
System Model ◽  
Surface Model ◽  
Yukon River ◽  
Yukon River Basin

<p>Climate-induced changes in snow cover, river flow, and freshwater ecosystems will greatly affect the indigenous groups in the Alaska and Yukon River Basin. To support policy-making on climate adaptation and mitigation for these underrepresented groups, an ongoing interdisciplinary effort is being made to combine Indigenous Knowledge with western science (https://www.colorado.edu/research/arctic-rivers/).</p><p>A foundational component of this project is a high fidelity representation of the aforementioned land surface processes. To this end, we aim to obtain a set of reliable high-resolution parameters for the Community Territory System Model (CTSM) for the continental scale domain of Alaska and the entire Yukon River Basin, which will be used in climate change simulations. CTSM is a complex, physically based state-of-the-science land surface model that includes complex vegetation and canopy representation, a multi-layer snow model, as well as hydrology and frozen soil physics necessary for the representation of streamflow and permafrost. Two modifications to the default CTSM configuration were made. First, we used CTSM that is implemented with hillslope hydrology to better capture the fine-scale hydrologic spatial heterogeneity in complex terrain. Second, we updated the input soil textures and organic carbon in CTSM using the high-resolution SoilGrid dataset.</p><p>In this study, we performed a multi-objective optimization on snow and streamflow metrics using an adaptive surrogate-based modeling optimization (ASMO). ASMO permits optimization of complex land-surface models over large domains through the use of surrogate models to minimize the computational cost of running the full model for every parameter combination. We ran CTSM at a spatial resolution of 1/24<sup>th</sup> degree and a temporal resolution of one hour using the ERA5 reanalysis data as the meteorological forcings. The ERA5 reanalysis data were bias-corrected to account for the orographic effects. We will discuss the ASMO-CTSM coupling workflow, performance characteristics of the optimization (e.g., computational cost, iterations), and comparisons of the default configuration and optimized model performance.</p>

scholarly journals Getis-Ord Gi* statistics for hydrocarbons content analysis in the Tromjegan river basin

2020 ◽  
Vol 26 (2) ◽  
pp. 151-160
Author(s):  
Valentina Dobryakova ◽  
Natalya Moskvina ◽  
Andrey Dobryakov ◽  
Lilia Zhegalina ◽  
Ildar Idrisov
Keyword(s):  
Environmental Monitoring ◽  
River Basin ◽  
Surface Waters ◽  
Temporal Dynamics ◽  
Hot Spot ◽  
Temporal Trends ◽  
Environmental Research ◽  
Analysis Tool ◽  
Hydrocarbon Pollution ◽  
Average Maximum

The information content and effectiveness of ecological research of the territory can be improved using the methods of multivariate analysis and mapping of the results. The article presents the analysis and mapping results of spatial and temporal trends of hydrocarbon pollution in the Tromjegan river basin for the period 2006–2018 using the tools of ArcGIS Pro. The informational and basic research is the data of local environmental monitoring of licensed blocks of the Khanty-Mansiysk Autonomous Okrug — Ugra. Pollution analysis was carried out on the basis of a detailed study of the geography of the source data using statistical calculations (minimum, average, maximum distances between sampling points, Getis-Ord Gi* index). Thematic maps were constructed using data averaged over the year. The spatial and temporal dynamics of hydrocarbons concentration in surface waters for 2006–2018 is analyzed using the “Hot Spot Analysis” tool. A temporary cluster section of hydrocarbons average annual concentration according to the Getis-Ord Gi* indicator allowed us to identify trends in the dynamics of indicators. Maps of hydrocarbons average annual concentration were compiled and the results of a spatial-temporal analysis of hydrocarbons average annual concentration in surface waters were presented. The identification of patterns in large arrays of long-term data and the consideration of the spatial component are necessary elements of modern environmental research. Analysis of the time series of average annual concentrations in the Tromjegan river basin showed a clear trend in the dynamics of hydrocarbon pollution. The findings can be the basis for making managerial decisions in the environmental monitoring of licensed blocks of the Khanty-Mansiysk Autonomous Okrug — Ugra.

scholarly journals ECOLOGICAL PROFILE OF DRAINAGE IN THE SHU RIVER BASIN UNDER ANTHROPOGENIC ACTIVITY

2021 ◽  
Vol 445 (1) ◽  
pp. 106-113
Author(s):  
A. T. Kozykeyeva ◽  
Zh. S. Mustafayev ◽  
L. V. Kireicheva ◽  
S. D. Dauletbay
Keyword(s):  
River Basin ◽  
Catchment Area ◽  
Nature Management ◽  
Soil Reclamation ◽  
Anthropogenic Activity ◽  
Kyrgyz Republic ◽  
Economic Sectors ◽  
Natural Function ◽  
Spatio Temporal ◽  
The Republic

Based on the study, many years of information and analytical materials «Kyrgyzhydromet» and «Kazhydromet», as well as the Department of State Statistics of the Kyrgyz Republic and the Republic of Kazakhstan, characterizing the formation of water resources and their use in the economic sectors of the catchment area of the Shu River basin, were considered as a model of the "activity-natural system", which performs runoff, environment-forming, ecological and social functions and is the spatial basis of nature management for a comprehensive assessment of the state of the territory and water bodies. As a basis for assessing the main functions of the catchment area of the Shu River basin, a geosystem approach was used, which determines the scientific and practical feasibility of geomorphological schematization, within the framework of which it becomes possible to construct their ecological profile on a spatio-temporal scale, which makes it possible to establish trends in the development of cognitive and transformative activities that determine the direction and intensity of anthropogenic activity. in the region. The main natural function of the river basin of the formation of a hydrogeochemical flow, which has one object for its discharge, determines the qualitative state of the ecological profile of the catchment area of the Shu River basin, that is, depending on the zonation from the mountainous class of landscapes to the lowland class of landscapes (superaquial and subaquial facies), natural hydrological facies are gradually disrupted. rhythms, affects the hydrogeological and soil-reclamation processes and environmental conditions, especially in the lower reaches of river basins, which are zones of storage of return (collector-drainage and waste) waters of industrial and agricultural facilities.

scholarly journals Finding of rare species of plats in the southern part of the Sinyukha river basin

2021 ◽  
pp. 37-45
Author(s):  
K. V. Zhulenko
Keyword(s):  
Protected Areas ◽  
River Basin ◽  
Plant Species ◽  
Current Distribution ◽  
Rare Species ◽  
Rare Plant ◽  
Anthropogenic Pressure ◽  
Natural Habitats ◽  
Rare Plant Species ◽  
New Localities

Introduction. The Sinyukha river basin, in particular its southern part, is an area with a high level of anthropogenic pressure and a significant level of agricultural development (the proportion of agricultural land is more than 80%), with fragmented natural habitats. Detailed chorological study is needed to supplement the pattern of the distribution of rare plant species, to develop measures for their conservation, to optimize the existing network of protected areas in the region.Рurpose of the study isto analyze the current distribution and describe new finds of some rare plant species in the southern part of the Sinyukha river basin.Methods. The research was conducted in April-June 2021. We surveyed the area of the Sinyukha river valley from the village of Kalamazovo (Vilshansky district, Kirovohrad region) to its confluence with the Southern Bug River in Pervomaisk (Mykolayiv region), as well as – the valleys of its tributaries – Chorny Tashlyk, Malyi Tashlyk and Sukhyi Tashlyk. When locating a rare species, the plants were photographed and georeferenced at a point with GPS-navigator. Species cover is given according to the Broun-Blanquet scale. The distribution maps were performed by free QGIS software.Results.We revealed new and confirmed known localities of 20 rare species:Adonis vernalis, Asplenium septentrionale, Astragalus dasyanthus, A. odessanus, Bellevalia sarmatica, Clematis integrifolia, Crocus reticulatus, Dianthus hypanicus, Ephedra distachya, Hyacinthella leucophaea, Iris pontica, Iris pumila, Ornithogalum boucheanum, Pulsatilla pratensis, Primula veris, Sedum borissovae, Stipa capillata, S. lessingiana, S. pennata, Tulipa hypanica. Among the 20 identified rare species one has the category VU (Vulnerable) in the IUCN red list and belongs to the list of Resolution 6 of the Berne Convention; three species are narrowly local endemics of the Dnieper Upland; 11 are listed in the Red Book of Ukraine (5 of them have the status vulnerable, 1 – rare, 5 – insufficiently known); 5 species are regionally rare in Kirovohrad and 8 – in Mykolayiv regions. Most of the revealed species have a cover less than 5%. Only 9 of the 20 registered rare species characterized by more than five localities within the studied area. Originality. New localities of 20 rare species of plants of different levels of protection have been revealed. Prospects for conservation valuableof their habitats are offered.Conclusion. We have identified a significant number of new localities of rare plant species that are not covered by proper protection. This indicates the need for more detailed chorological research to elucidate the current distribution of rare species and the creation of new protected areas. Key words:rare species; threat category; red lists; natural habitats; chorology.

scholarly journals Preliminary results of studies on the distribution of invasive alien vascular plant species occurring in semi-natural and natural habitats in NW Poland

2015 ◽  
Vol 37 (1) ◽  
pp. 21-35 ◽  
Author(s):  
Agnieszka Popiela ◽  
Andrzej Łysko ◽  
Zofia Sotek ◽  
Krzysztof Ziarnek
Keyword(s):  
Invasive Species ◽  
Alien Species ◽  
Lycium Barbarum ◽  
Natural Habitats ◽  
Lupinus Polyphyllus ◽  
Reynoutria Japonica ◽  
Acer Negundo ◽  
Bidens Frondosa ◽  
Clematis Vitalba ◽  
Nw Poland

Abstract In Western Pomerania, as in other areas of Europe, alien species play an increasingly important role. In particular, invasive plants tend to spread rapidly and in large numbers which may reduce diversity of native species, leading to the phenomenon of “trivialisation of flora”, and transform ecosystems. The list of invasive species (32 taxa) includes alien species occurring throughout Western Pomerania, and penetrating natural or semi-natural habitats. The second group consists of potentially invasive species (23 taxa), i.e. those distributed across the area under study and tending to increase the number of their localities in semi-natural and natural habitats, taxa invasive only locally, as well as species with missing data, which does not currently allow including them into the first group. Invasive weeds, as well as some epecophytes and archaeophytes occurring only on anthropogenic sites and tending to spread, were not taken into account. Among hemiagriophytes, the most common and troublesome ones are: Conyza canadensis, Erigeron annuus, Lolium multiflorum, Lupinus polyphyllus, Solidago canadensis, S. gigantea. Among holoagriophytes, i.e. the taxa which received the highest naturalisation status, very expansive species, successful in land colonisation, like Acer negundo, Bidens frondosa, B. connata, Clematis vitalba, Elodea canadensis, Epilobium ciliatum, Heracleum sosnowskyi, Impatiens glandulifera, I. parviflora, Padus serotina, Quercus rubra and Robinia pseudoacacia, should be given particular attention. Among the invasive and potentially invasive species, most taxa penetrate plant communities of the Artemisietea and Molinio-Arrhenatheretea class, followed by Querco-Fagetea, Vaccinio-Piceetea, Stellarietea mediae, Salicetea purpurae and Koelerio-Corynophoretea. The number of invasive species is twice as high when compared to the situation of these species in Poland; on the contrary, the number of species inhabiting anthropogenic, semi-natural and natural habitats is two times lower, while that of holoagriophytes and hemiagriophytes is 56.3% and 43.7%, respectively. It seems that in the case of some invasive and potentially invasive species, a decrease in the number of their locations may be observed from the west to the east (e.g. for Acer negundo, Bromus carinatus, Clematis vitalba, Helianthus tuberosus, Lycium barbarum, Reynoutria japonica, Rosa rugosa, Vicia grandiflora). Distribution patterns for some species (e.g. for Parthenocytisus inserta or Xanthium albinum) are indicative of a likely major role of the Odra River valley in the spreading of invasive species. It should be kept in mind that the area of the North-West Poland is poorly examined in terms of its flora, so the results provided in this paper are tentative. Nevertheless, the maps illustrate colonisation trends and directions and, moreover, have been so far the only attempt to synthesise this problem in NW Poland.

АНАЛИЗ МНОГОЛЕТНЕЙ ДИНАМИКИ ВОДОПОЛЬЗОВАНИЯ НА ОРОСИТЕЛЬНЫХ СИСТЕМАХ КРАСНОДАРСКОГО КРАЯ

2020 ◽  
pp. 5
Author(s):  
N.O. Naumenko ◽  
A.A. Buber
Keyword(s):  
Water Resources ◽  
River Basin ◽  
Anthropogenic Activity ◽  
Negative Consequences ◽  
Irrigation Systems ◽  
Water Users ◽  
Activity Measures ◽  
Krasnodar Region ◽  
Kuban River ◽  
Surface And Groundwater

В работе рассмотрены основные водопользователи бассейна реки Кубань - оросительные системы Краснодарского края. Приведена динамика использования водных ресурсов поверхностных и подземных вод за 1999 - 2018 гг. по следующим показателям: забор воды из источников, в том числе из поверхностных и подземных, их использование, водоотведение и безвозвратное водопотребление относительно природных водных объектов. Анализ водохозяйственной обстановки бассейна р. Кубань выявил ряд проблем, связанных с рациональным использованием водных ресурсов. Для устранения негативных последствий, возникших, в том числе, вследствие антропогенной деятельности человека, на последующих этапах работы будут предложены мероприятия по уменьшению дефицита воды на рисовых оросительных системах в маловодные периоды.The article considers the Kuban river basin main water users - Krasnodar region irrigation systems. Considered the surface and groundwater water resources use dynamics from 1999 to 2018 for the following indicators: water intake from sources, including surface and underground, their use, drainage and irrevocable water consumption relative to natural water objects. Analysis of the water management situation in the Kuban river basin revealed a number of problems related to the rational water resources use. In order to eliminate the negative consequences that have arisen, including as a result of human anthropogenic activity, measures to reduce the water deficit in rice irrigation systems in low-water periods will be proposed at the next stages of the work.

scholarly journals Freshwater Ecosystems versus Hydropower Development: Environmental Assessments and Conservation Measures in the Transboundary Amur River Basin

Water ◽  
2019 ◽  
Vol 11 (8) ◽  
pp. 1570 ◽  
Author(s):  
Simonov ◽  
Nikitina ◽  
Egidarev
Keyword(s):  
River Basin ◽  
Proper Time ◽  
Freshwater Ecosystems ◽  
Amur River Basin ◽  
Dam Construction ◽  
Management Scenarios ◽  
Hydropower Development ◽  
Amur River ◽  
Environmental Assessments ◽  
Hydropower Impacts

Hydropower development causes a multitude of negative effects on freshwater ecosystems, and to prevent and minimize possible damage, environmental impact assessments must be conducted and optimal management scenarios designed. This paper examines the impacts of both existing and proposed hydropower development on the transboundary Amur River basin shared by Russia, China, and Mongolia, including the effectiveness of different tools and measures to minimize damage. It demonstrates that the application of various assessment and conservation tools at the proper time and in the proper sequence is the key factor in mitigating and minimizing the environmental impacts of dams. The tools considered include basin-wide assessments of hydropower impacts, the creation of protected areas on rivers threatened by dam construction, and environmental flows. The results of this work show how the initial avoidance and mitigation of hydropower impacts at early planning stages are more productive than the application of any measures during and after dam construction, that the assessment of hydropower impacts must be performed at a basin level rather than be limited to a project implementation site, and that the full spectrum of possible development scenarios should be considered. In addition, this project demonstrates that stakeholder analysis and robust public engagement are as crucial for the success of environmental assessments as scientific research is for the protection of river basins.

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