scholarly journals ON TAXONOMIC INVARIANTS OF MACROPHYTE ALGAE AND THEIR VIOLATION UNDER EXPOSURE TO ANTHROPOGENIC FACTORS

2019 ◽  
Vol 199 ◽  
pp. 249-255
Author(s):  
B. I. Semkin ◽  
L. I. Varchenko ◽  
M. V. Gorshkov
Keyword(s):  
Anthropogenic Impacts ◽  
Arithmetic Mean ◽  
Anthropogenic Factors ◽  
Mathematical Methods ◽  
Important Type ◽  
Rapid Changes ◽  
Percentage Similarity

New mathematical methods for determining of multicomponent invariants are developed by detection of their constancy using the measures of percentage similarity. Typification of the descriptive sets is proposed. An important type for verification of invariants is considered — generally normalized descriptive sets, with exception of 0 and 1 components. In this type of descriptive sets, the invariants and relative spectra match, the arithmetic mean of multicomponent invariants and the mediant also match. Taxonomic invariants for the macrophyte floras in the Avachinskaya Guba Bay are determined for 1970 and 1991, and their rapid changes under anthropogenic impacts are demonstrated.

STUDYING OF TERSKO-SULAKSKAYA LOWLAND VEGETATION UNDER THE RESULTS OF GROUND-BASED RESEARCH AND AUTOMATED INTERPRETATION

1970 ◽  
pp. 29-32
Author(s):  
M. I. Dzhalalova ◽  
A. B. Biarslanov ◽  
D. B. Asgerova
Keyword(s):  
Plant Communities ◽  
Satellite Imagery ◽  
Vegetation Cover ◽  
Anthropogenic Impacts ◽  
Species Abundance ◽  
Remote Sensing Data ◽  
Indigenous Communities ◽  
The State ◽  
Anthropogenic Factors ◽  
Internet Resource

The state of plant communities in areas located in the Tersko-Sulak lowland was studied by assessing phytocenotic indicators: the structure of vegetation cover, projective cover, species diversity, species abundance and elevated production, as well as automated decoding methods. There are almost no virgin soils and natural phytocenoses here; all of them have been transformed into agrocenoses (irrigated arable lands and hayfields, rice-trees and pastures). The long-term impact on pasture ecosystems of natural and anthropogenic factors leads to significant changes in the indigenous communities of this region. Phytocenoses are formed mainly by dry-steppe types of cereals with the participation of feather grass, forbs and ephemera, a semi-desert haloxerophytic shrub - Taurida wormwood. At the base of the grass stand is common coastal wormwood and Taurida wormwood - species resistant to anthropogenic influences. Anthropogenic impacts have led to a decrease in the number of species of feed-rich grain crops and a decrease in the overall productivity of pastures. Plant communities in all areas are littered with ruderal species. The seasonal dynamics of the land cover of the sites was estimated by the methods of automatic decoding of satellite images of the Landsat8 OLI series satellite for 2015, dated by the periods: spring - May 20, summer - July 23, autumn - October 20. Satellite imagery data obtained by Landsat satellite with a resolution in the multispectral image of 30 m per pixel, and in the panchromatic image - 10 m per pixel, which correspond to the requirements for satellite imagery to assess the dynamics of soil and vegetation cover. Lower resolution data, for example, NDVI MODIS, does not provide a reliable reflection of the state of soil and vegetation cover under arid conditions. In this regard, remote sensing data obtained from the Internet resource https://earthexplorer.usgs.gov/ was used.

scholarly journals Lessons in Fundamental Mechanisms and Diverse Adaptations from the 2015 Bacterial Locomotion and Signal Transduction Meeting

2015 ◽  
Vol 197 (19) ◽  
pp. 3028-3040 ◽  
Author(s):  
Birgit M. Prüβ ◽  
Jun Liu ◽  
Penelope I. Higgs ◽  
Lynmarie K. Thompson
Keyword(s):  
Signal Transduction ◽  
Biofilm Formation ◽  
Cell Biology ◽  
Bacterial Species ◽  
Interacting Proteins ◽  
Mathematical Methods ◽  
Detailed Understanding ◽  
Rapid Changes ◽  
Functional Mechanisms ◽  
Insight Into

In response to rapid changes in their environment, bacteria control a number of processes, including motility, cell division, biofilm formation, and virulence. Research presented in January 2015 at the biennial Bacterial Locomotion and Signal Transduction (BLAST) meeting in Tucson, AZ, illustrates the elegant complexity of the nanoarrays, nanomachines, and networks of interacting proteins that mediate such processes. Studies employing an array of biophysical, genetic, cell biology, and mathematical methods are providing an increasingly detailed understanding of the mechanisms of these systems within well-studied bacteria. Furthermore, comparisons of these processes in diverse bacterial species are providing insight into novel regulatory and functional mechanisms. This review summarizes research presented at the BLAST meeting on these fundamental mechanisms and diverse adaptations, including findings of importance for applications involving bacteria of medical or agricultural relevance.

scholarly journals Anthropogenic and catchment characteristic signatures in the water quality of Swiss rivers: a quantitative assessment

2018 ◽  
Author(s):  
Martina Botter ◽  
Paolo Burlando ◽  
Simone Fatichi
Keyword(s):  
Water Quality ◽  
Anthropogenic Impacts ◽  
Stream Water ◽  
Anthropogenic Activities ◽  
Quality Data ◽  
Anthropogenic Factors ◽  
Water Quality Data ◽  
Natural And Anthropogenic Factors

Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the catchment. We investigate long-term water quality data of eleven Swiss catchments with the objective to discern the influence of catchment characteristics and anthropogenic activities on delivery of solutes in stream water. Magnitude, trends and seasonality of water quality samplings of different solutes are evaluated and compared across catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify different solute behaviors. Although the influence of catchment geology, morphology and size is sometime visible on in-stream solute concentrations, anthropogenic impacts are much more evident. Solute variability is generally smaller than discharge variability. The majority of solutes shows dilution with increasing discharge, especially geogenic species, while sediment-related solutes (e.g. Total Phosphorous and Organic Carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors impact the biogeochemical response of streams and, while the majority of solutes show identifiable behaviors in individual catchments, only a minority of behaviors can be generalized across catchments that exhibit different natural, climatic and anthropogenic features.

scholarly journals Changes of Taxonomic Diversity of Soils’ Mеasopopulation in the Range of Environmental Conditions of the Northern Macroslope of Khamar-Daban

2020 ◽  
Vol 34 ◽  
pp. 55-66
Author(s):  
E. P. Bessolitsyna ◽  
Keyword(s):  
Anthropogenic Impacts ◽  
Taxonomic Diversity ◽  
Main Trend ◽  
Anthropogenic Factors ◽  
Species Number ◽  
Soil Conditions ◽  
Anthropogenic Pressure ◽  
Ecological Analysis ◽  
High Rise ◽  
Landscape Ecological

Landscape-ecological analysis of taxonomic diversity and structure of soil invertebrates’ community in the geosystems of the Hamar-Daban Region was carried out on the main levels: local (biogeocenotic), topological (facies) and regional. The paper considers regularities of transformation of communities’ structure in landscape-zonal range under the influence of natural conditions: phytocenotic (peculiarities of vegetation), edaphical and climatic (hydrothermal regime of the soil) and anthropogenic factors. On the models groups: Сarabidae, Staphylinidae, Elateridae, Formicidae altitudinal changes of community' structure have been traced; in all landscape-high-rise complexes (in species composition and abundance of species) was revealed forest preference. The main trend of changes in taxonomic diversity of invertebrate’s communities is a decrease in the species number in the gradient of an increase of climate aridity, and strengthening of the hypothermal character and anthropogenic pressure. Peculiarities of structures invertebrate’s communities and their changes due to the climate change and anthropogenic impacts can serve as one of diagnostic criteria of soil conditions and can be used for estimation of landscapes’ transformation and monitoring.

scholarly journals Analyze of Dynamics and Degree of Anthropogenic Impacts on the Ecogeomorphological Conditions (Case Study of the Kura-Araz Lowland and Surrounding Areas)

2021 ◽  
pp. 92-102
Author(s):  
J. Y. Gasimov
Keyword(s):  
Land Cover ◽  
Building Materials ◽  
Oil And Gas ◽  
Anthropogenic Impacts ◽  
Remote Sensing Data ◽  
Gas Production ◽  
Anthropogenic Factors ◽  
Stream Network ◽  
Landsat Images ◽  
Irrigation Network

Theoretical base of human effects on geomorphological environment, the evolution of anthropogenic impacts and modern situation of human activity were analyzed in the studied area. On the base of supervised and unsupervised classification of the Landsat images (1976–2017) Land use-Land cover map of the territory was compiled. The dynamic and transformation of land covers were determined with the change detection function. It was defined that the most increasing land cover in the area of transformation since 1976 to 2017 is the sown area. Due to the anthropogenic development of the study area, the largest decrease in the area of exposed (33,85%) and saline (25,43%) land cover occurred during this period. Among the listed anthropogenic factors (oil and gas production, production of building materials, grazing, settlements, etc.), it is established that irrigation erosion has a wide radius of encirclement and a high degree of influence. With the application of Geographic Information System technologies, on the base of remote sensing data the density of the irrigation network has been computed and mapped. Ecogeomorphological assessment and zoning of the territory has been carried out. According to the comparative analysis of horizontal (stream network) and anthropogenic (irrigation network) fragmentation it was determined that the estimated maximum cost of anthropogenic fragmentation in the study area is 2,5 times higher than natural horizontal fragmentation.

scholarly journals Honey Bee Diversity is Swayed by Migratory Beekeeping and Trade Despite Conservation Practices: Genetic Evidences for the Impact of Anthropogenic Factors on Population Structure

2019 ◽  
Author(s):  
Mert Kükrer ◽  
Meral Kence ◽  
Aykut Kence
Keyword(s):  
Population Structure ◽  
Gene Flow ◽  
Honey Bee ◽  
Honey Bees ◽  
Anthropogenic Impacts ◽  
Anthropogenic Factors ◽  
Conservation Implications ◽  
The Status ◽  
Bee Diversity ◽  
The Impact

Intense admixture of honey bee (Apis mellifera L.) populations is mostly attributed to migratory beekeeping practices and replacement of queens and colonies with non-native races or hybrids of different subspecies. These two practices are also heavily carried out in Anatolia and Thrace where 5 subspecies reside naturally.Here, we carried out an analysis of population structure of honey bees sampled from six different regions (n = 250) in order to test the genetic impacts of migratory beekeeping, queen and colony trade and conservation efficacy of isolated regions. A total of 30 microsatellite markers were used in four multiplex reactions.Direct genetic impact of migratory beekeeping was demonstrated first time based on a comparison of assignment of individuals to their geographically native populations where migratory colonies showed less fidelity. We found genetic evidence for them acting as a hybrid zone mobile in space and time, becoming vectors of otherwise local gene combinations.The effects of honey bee trade were revealed by the presence of very high introgression levels from the highly commercial Caucasian bees naturally limited to a narrow range. We also measured the direction and magnitude of this gene flow connected with bee trade.Comparison between regions that are either open to migratory beekeeping or not let us evaluate the status of isolated regions as centers of limited gene flow and showed the importance of establishing such regions.Despite signs of gene flow, our findings confirm high levels of geographically structured genetic diversity of four subspecies of honey bees in Turkey and emphasize the need to develop policies to maintain this diversity.Our overall results might potentially bear a wider interest to the community since they constitute an important attempt to quantify the effects of anthropogenic impacts on established patterns of honey bee diversity. Our measurable and justified findings on migratory beekeeping, queen and colony replacements as well as conservation implications will hopefully be of use for the decision makers and other stakeholders.

scholarly journals Anthropogenic impacts in protected areas: assessing the efficiency of conservation efforts using Mediterranean ant communities

PeerJ ◽  
2016 ◽  
Vol 4 ◽  
pp. e2773 ◽  
Author(s):  
Elena Angulo ◽  
Raphaël Boulay ◽  
Francisca Ruano ◽  
Alberto Tinaut ◽  
Xim Cerdá
Keyword(s):  
Protected Areas ◽  
Human Disturbance ◽  
Anthropogenic Disturbance ◽  
Anthropogenic Impacts ◽  
Diversity Indices ◽  
Anthropogenic Factors ◽  
Ant Communities ◽  
Ant Community ◽  
Similarity Indices ◽  
Degree Of Fragmentation

In countries with high levels of urbanization, protected areas are often subject to human disturbance. In addition to dealing with fragmentation, land managers also have to confront the loss of characteristic ecosystems due to biotic homogenization, which is the increasing similarity of species assemblages among geographically separate regions. Using ants as a model system, we explored whether anthropogenic factors negatively affect biodiversity of protected areas of a regional network. We first analysed the effect of fragmentation and human activity on ant biodiversity within protected areas. Secondly, we tested whether homogenization could occur among protected areas. We sampled 79 plots in the most common habitats of 32 protected areas in southern Spain and calculated ant community richness and diversity indices, endemic richness, and Bray–Curtis similarity indices (between pairs of plots). We related these indices with patch fragmentation and human disturbance variables, taking into account environmental, spatial and landscape covariates. We used ANOSIM to test for differences between similarity indices, specifically among levels of anthropogenic disturbance. Species richness was positively correlated with the distance from the border of the protected areas and the number of endemic species was negatively correlated with the degree of fragmentation. Ant communities were similar within each protected area but differed across regions. Human disturbance was not correlated with community similarity among sampling points. Our approach suggests how the ability of European protected areas to sustain biodiversity is limited because they remain susceptible to anthropogenic impacts. Although ant communities maintained their biological distinctiveness, we reveal how fragmentation within protected areas is important for community richness and endemism maintenance.

Experience in assessing the dynamic state of vegetation based on a large-scale map of modern vegetation (on the example of the area “Levashovskiy les”, St. Petersburg)

2019 ◽  
pp. 39-56 ◽  
Author(s):  
E. A. Volkova ◽  
V. N. Khramtsov
Keyword(s):  
Plant Communities ◽  
Forest Fires ◽  
Vegetation Cover ◽  
Large Scale ◽  
Anthropogenic Impacts ◽  
Dynamic State ◽  
Anthropogenic Factors ◽  
Natural State ◽  
Short Term

The article is devoted to the vegetation mapping of the “Levashovskiy les”— a large forest-mire massif located in the northern part of St. Petersburg (Fig. 1). It continues a series of articles on the vegetation of existing and proposed specially protected natural areas of St. Petersburg (Volkova, Khramtsov, 2018). Large-scale map of modern vegetation (Fig. 2) is presented; the map legend includes 67 main numbers, the signs and numeric indexes at the numbers made it possible to show 93 mapping units (associations and their variants). Brief description of the main types of plant communities (spruce, pine, birch, aspen, gray alder and black alder forests; raised bogs, transitional mires and fens, floodplain and upland meadows) reveals the content of the legend. Vegetation cover is characterized by the dominance of secondary communities. The main anthropogenic impacts on modern vegetation are following: drainage reclamation, deforestation and former agricultural use, forest fires, gas pipelines, highways. Most of the forest communities are secondary ones; they have grown under the pressure of various anthropogenic factors and at different time. Nowadays an active process of natural regeneration of conife­rous (mainly spruce) trees goes in the forests. Plant community structure and species composition were taken into account as well as their dynamic state. To assess the degree of disturbance of plant communities and the potential for their restoration, the analysis of all mapped vegetation categories with respect to their position in the ranks of restorative successions was made. Then an assessment map “Dynamic state of plant communities” (Fig. 3) was compiled. The map shows following categories of dynamic types of communities: conventionally primary; relatively long-term secondary and stable long-term secondary (Sukachev, 1938; Isachenko, 1964; Karpenko, 1965; Gribova, Isachenko, 1972); short-term secondary that were divided into 3 categories representing different stages of restorative series. Present state of the vegetation cover of the “Levashovskiy les” can be determined by the ratio of the areas of conventionally primary and secondary communities. Areal analysis of dynamic categories of plant communities showed that only a bit more than 20 % of the territory is occupied by conventionally primary communities and about 60 % – by short-term secondary ones with good restorative potential. Without strong anthropogenic and natural disturbances, a significant part of the disturbed plant communities will be able to self-restore to their natural state. The establishment of a specially protected natural area as well as the regulation of conservation regime will support restoration process of nature ecosystems.

USING OF MULTI-YEAR REMOTE SENSING DATA FOR THE NEVA BAY AND THE EASTERN GULF OF FINLAND FOR REVEALING PECULIARITIES OF ANTHROPOGENIC IMPACTS OF HYDRO-TECHNICAL FACILITIES BUILDING AND DREDGINGS ON THE COASTAL AND WATER ENVIRONMENT

2017 ◽  
Author(s):  
Leontina Sukhacheva ◽  
Leontina Sukhacheva
Keyword(s):  
Remote Sensing ◽  
Coastal Water ◽  
Anthropogenic Impacts ◽  
Water Environment ◽  
Water Dynamics ◽  
Spatiotemporal Variability ◽  
Gulf Of Finland ◽  
Anthropogenic Factors ◽  
Neva Bay

This paper is devoted to the use of long-term remote sensing (RS) data for assessment of anthropogenic impacts on the coastal water environment of the Neva Bay (NB) and the eastern part of the Gulf of Finland (EGOF), caused by construction of hydro-ingineering facilities, operations for land reclamation, dredging and underwater dumping. The study period includes past four decades for which airborne and satellite data are available. Results of using long-term RS data sets for monitoring and studying coastal water environment, for estimation of levels of water contamination by suspended matter (SM), for revealing spatiotemporal variability of SM distribution under the influence of natural and anthropogenic factors, for studying features of surface water dynamics and of phytoplankton development, are discussed.

scholarly journals Anthropogenic and catchment characteristic signatures in the water quality of Swiss rivers: a quantitative assessment

2019 ◽  
Vol 23 (4) ◽  
pp. 1885-1904 ◽  
Author(s):  
Martina Botter ◽  
Paolo Burlando ◽  
Simone Fatichi
Keyword(s):  
Water Quality ◽  
Anthropogenic Impacts ◽  
Stream Water ◽  
Temporal Variations ◽  
Quality Data ◽  
Anthropogenic Factors ◽  
Water Quality Data ◽  
Catchment Characteristics

Abstract. The hydrological and biogeochemical response of rivers carries information about solute sources, pathways, and transformations in the catchment. We investigate long-term water quality data of 11 Swiss catchments with the objective to discern the influence of major catchment characteristics and anthropic activities on delivery of solutes in stream water. Magnitude, trends, and seasonality of water quality samplings of different solutes are evaluated and compared across catchments. Subsequently, the empirical dependence between concentration and discharge is used to classify the solute behaviors. While the anthropogenic impacts are clearly detectable in the concentration of certain solutes (i.e., Na+, Cl−, NO3, DRP), the influence of single catchment characteristics such as geology (e.g., on Ca2+ and H4SiO4), topography (e.g., on DOC, TOC, and TP), and size (e.g., on DOC and TOC) is only sometimes visible, which is also because of the limited sample size and the spatial heterogeneity within catchments. Solute variability in time is generally smaller than discharge variability and the most significant trends in time are due to temporal variations of anthropogenic rather than natural forcing. The majority of solutes show dilution with increasing discharge, especially geogenic species, while sediment-bonded solutes (e.g., total phosphorous and organic carbon species) show higher concentrations with increasing discharge. Both natural and anthropogenic factors affect the biogeochemical response of streams, and, while the majority of solutes show identifiable behaviors in individual catchments, only a minority of behaviors can be generalized across the 11 catchments that exhibit different natural, climatic, and anthropogenic features.

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