scholarly journals Variation in leaf morphological traits of Populus tremula L. under the conditions of technogenic load

2020 ◽  
pp. 121-128
Author(s):  
U. Semak ◽  
◽  
M. Mylen’ka ◽  
Keyword(s):  
Fluctuating Asymmetry ◽  
Asymmetry Index ◽  
Morphological Features ◽  
Populus Tremula ◽  
Anthropogenic Load ◽  
Morphological Parameters ◽  
Linear Measurements ◽  
Leaf Vein ◽  
Industrial Object ◽  
State Of The Environment

The article presents the study of leaf morphological features of Populus tremula L. Growing under the conditions of the influence emissions from Burshtynska TPP. The methods of linear morphometry were used to analyze the variability of the morphological parameters of leaves at high levels of pollutants. In the zone of influence of the industrial object there is a significant decrease in the foliar parameters. Uneven variability of morphological parameters between the study plots of industrial pollution and with minimized technogenic load are revealed. Levels of variability of morphological parameters are estimated using coefficient of variation, which for most of the analyzed morphological features at the polluted plot load is characterized by high and average values. The most varied ones were the distance between the first and second veins and the length of the second vein from the base of the leaf vein. For bioindication of anthropogenic load, an index of fluctuating asymmetry of P. tremul leaf blades has been tested. The analysis of the fluctuating asymmetry was based on leaf linear measurements and area of ​​ the halves of leaf blades. The results indicated an increase in fluctuating asymmetry index in plant growing at the polluted plot, both in linear measurements and in area indices. The comparison of the two approaches to the estimation of the level of fluctuating asymmetry has been carried out. As a result of this study, those foliar morphometric parameters of P. tremula, which exhibit high morphological reactivity under the influence of anthropogenic load, can be used as bioindicatory markers for assessing the state of the environment. A reliable indicator of technological pressure is the level of fluctuating asymmetry that can be recommended for use in bioindicative studies.

scholarly journals Plant life assessment by the total fluctuating asymmetry index in the RUDN University campus

2018 ◽  
Vol 26 (3) ◽  
pp. 335-345
Author(s):  
Roman Khasanovich Mamadzhanov
Keyword(s):  
Fluctuating Asymmetry ◽  
Tree Species ◽  
Asymmetry Index ◽  
Life Assessment ◽  
New Method ◽  
Morphological Parameters ◽  
University Campus ◽  
Plant Life ◽  
Potential Impact ◽  
Asymmetry Parameters

The article proposes a new method of plant life assessment by the total fluctuating asymmetry index that includes seven asymmetry parameters of leaves growing in three experimental areas near the Leninsky Prospekt and Miklukho-Maklaya highways. The data on 18 morphological parameters of leaves of the tree species growing in these experimental areas has been presented. The potential impact of the Leninsky Prospekt and Miklukho-Malkaya highways on the morphological parameters of leaves has been estimated.

scholarly journals A New Fluctuating Asymmetry Index, or the Solution for the Scaling Effect?

Symmetry ◽  
2015 ◽  
Vol 7 (2) ◽  
pp. 327-335 ◽  
Author(s):  
Cino Pertoldi ◽  
Torsten Kristensen
Keyword(s):  
Fluctuating Asymmetry ◽  
Asymmetry Index ◽  
Scaling Effect

scholarly journals Morphological Estimation of Cellularity on Neo-Adjuvant Treated Breast Cancer Histological Images

2020 ◽  
Vol 6 (10) ◽  
pp. 101
Author(s):  
Mauricio Alberto Ortega-Ruiz ◽  
Cefa Karabağ ◽  
Victor García Garduño ◽  
Constantino Carlos Reyes-Aldasoro
Keyword(s):  
Breast Cancer ◽  
Deep Learning ◽  
Morphological Features ◽  
Training Data ◽  
Morphological Operations ◽  
Morphological Parameters ◽  
Learning Approaches ◽  
Residual Cancer Burden ◽  
Histological Images ◽  
Treated Breast

This paper describes a methodology that extracts key morphological features from histological breast cancer images in order to automatically assess Tumour Cellularity (TC) in Neo-Adjuvant treatment (NAT) patients. The response to NAT gives information on therapy efficacy and it is measured by the residual cancer burden index, which is composed of two metrics: TC and the assessment of lymph nodes. The data consist of whole slide images (WSIs) of breast tissue stained with Hematoxylin and Eosin (H&E) released in the 2019 SPIE Breast Challenge. The methodology proposed is based on traditional computer vision methods (K-means, watershed segmentation, Otsu’s binarisation, and morphological operations), implementing colour separation, segmentation, and feature extraction. Correlation between morphological features and the residual TC after a NAT treatment was examined. Linear regression and statistical methods were used and twenty-two key morphological parameters from the nuclei, epithelial region, and the full image were extracted. Subsequently, an automated TC assessment that was based on Machine Learning (ML) algorithms was implemented and trained with only selected key parameters. The methodology was validated with the score assigned by two pathologists through the intra-class correlation coefficient (ICC). The selection of key morphological parameters improved the results reported over other ML methodologies and it was very close to deep learning methodologies. These results are encouraging, as a traditionally-trained ML algorithm can be useful when limited training data are available preventing the use of deep learning approaches.

scholarly journals Fluctuating Asymmetry in Morphological Characteristics of Betula Pendula Roth Leaf under Conditions of Urban Ecosystems: Evaluation of the Multi-Factor Negative Impact

Symmetry ◽  
2020 ◽  
Vol 12 (8) ◽  
pp. 1317 ◽  
Author(s):  
Elena Shadrina ◽  
Nina Turmukhametova ◽  
Victoria Soldatova ◽  
Yakov Vol'pert ◽  
Irina Korotchenko ◽  
...  
Keyword(s):  
Fluctuating Asymmetry ◽  
Betula Pendula ◽  
Negative Impact ◽  
Morphological Characteristics ◽  
Developmental Stability ◽  
Anthropogenic Load ◽  
Traffic Load ◽  
Anthropogenic Factors ◽  
Betula Pendula Roth ◽  
The Impact

The fluctuating asymmetry (FA) in Betula pendula Roth was estimated as an integrated measure of five morphometric characteristics of a lamina. Samples were collected in seven cities that differ both in climatic conditions, moderately to sharply continental. In total, 33 ecotopes were distinguished with various level of anthropogenic load. The statistical data processing involved correlation, one-way and factorial ANOVA, regression analyses, and principal component analysis (PCA). The impact of 25 climatic and anthropogenic factors on the FA value was considered. In most urban ecotopes, the integrated fluctuating asymmetry (IFA) value was higher than in natural biotopes of the same region. No significant inter-annual differences in IFA values were found. FA dependence on traffic load is noted to be statistically significant. The covariation analysis of IFA, climatic, and anthropogenic variables in various urban ecotopes revealed the impact of three groups of factors that together explain 93% of the variance in environmental parameters. The complex analysis clearly arranged the studied ecotopes by pollution gradient and climatic patterns. The primary effect of the total anthropogenic load on the developmental stability of B. pendula results in an IFA increase. IFA can play a key role in bioindication assessment of environmental quality. The climatic factors have no significant effect on the developmental stability of B. pendula in urban conditions.

Modeling and Visualization Based on Morphological Features of Leaf Vein

2013 ◽  
Vol 11 (6) ◽  
pp. 1288-1292
Author(s):  
Lei Wang ◽  
Yueshun He ◽  
Shumin Zhou ◽  
Ling Lu
Keyword(s):  
Morphological Features ◽  
Leaf Vein

scholarly journals Comparative assessment of the ecological state of Timiryazevsky district forest park zones in Moscow

2021 ◽  
Vol 6 (48) ◽  
pp. 30-30
Author(s):  
Irina Andreeva ◽  
◽  
Dmitry Morev ◽  
Evgeny Taller ◽  
Ivan Vasenev
Keyword(s):  
Fluctuating Asymmetry ◽  
Rural Areas ◽  
Urban Infrastructure ◽  
Anthropogenic Load ◽  
Cellulolytic Activity ◽  
Forest Park ◽  
Undisturbed Forest ◽  
Forest Parks ◽  
Stand Conditions

The article presents the results of a comparative environmental assessment of the quality of the environment in the central and outlying zones of two forest parks, contrasting in area, types and magnitude of anthropogenic load, - the Experimental Forest Station and the Dubki Culture and Recreation Park, located in the Timiryazevsky district of Moscow. The quality of the environment in the undisturbed forest biocenosis in the center of the Experimental Forest Station corresponded to the quality of the environment in the rural areas of the Moscow Region, while the environmental situation in the outlying zones of both forest parks bordering various urban infrastructure facilities deviated to varying degrees from the conditional norm. The worst indicators of the environmental quality and forest stand conditions were noted in the recreational zones located at the III-IV stage of digression, as well as in the zones bordering the roads, within which the degree of fluctuating asymmetry of birch leaves was suspended and the cellulolytic activity of the soil was 1.5-2.5 times lower than the background. The combination of recreational and transport loads reduced the quality of the environment in the Dubki park to a critical level. Keywords: CITY FOREST, BORDERLAND, ANTHROPOGENIC LOAD, POLLUTION, RECREATION, DEGRADATION, FLUCTUATING ASYMMETRY, CELLULOLYTIC ACTIVITY, APPLICATION METHOD, AIRBORNE POLLUTION, SNOW COVER

scholarly journals Fluctuating asymmetry of the needles of Pinus brutia var. pityusa (STEVEN) SILBA, 1985, growing in industrial and recreational areas in Tuapse

2020 ◽  
Vol 224 ◽  
pp. 04044
Author(s):  
G Kozlov ◽  
M Pushkarev ◽  
I Belyaeva ◽  
A Maksimova ◽  
S Shvidkoy ◽  
...  
Keyword(s):  
Black Sea ◽  
Fluctuating Asymmetry ◽  
Well Being ◽  
Asymmetry Index ◽  
City Center ◽  
The Caucasus ◽  
Port Area ◽  
Black Sea Coast ◽  
The City ◽  
Sea Coast

The paper provides information on the index of fluctuating asymmetry of the Pitsunda pine in industrial and recreational areas in the city of Tuapse (the Russian Black Sea coast of the Caucasus). It is shown that pollution is localized in the port area, and in the city center, the fluctuating asymmetry index is comparable to that for resort areas at a considerable distance from the Tuapse port. The necessity of taking into account the climate when using the coefficient of fluctuating asymmetry of the needles of the Mediterranean (Pitsunda) pine in assessing the degree of ecological well-being of various areas is shown.

Qualitative and Quantitative Indicators of Foliar Mass of Woody Plants in Urban Greenspaces According to the Level of Air Pollution

2021 ◽  
Vol 18 (3) ◽  
pp. 11-19
Author(s):  
Mei Lu
Keyword(s):  
Fluctuating Asymmetry ◽  
Control Site ◽  
Asymmetry Index ◽  
Control Group ◽  
Leaf Fall ◽  
Qualitative And Quantitative ◽  
Ash Trees ◽  
Urban Greenspaces ◽  
Quantitative Indicators ◽  
The City

The purpose of this study is to conduct a comparative analysis of the leaf fall timing and parameters of fluctuating leaf asymmetry among two commonly used plant species for street landscaping in Detroit city, namely, American elm and American ash. The study was completed between summer and fall for the year 2019 in and around Detroit, US. Phenological leaf fall timing of elm and ash was studied, and the fluctuating asymmetry index of their leaves was estimated within the city limits (80 trees of ash and 40 of elm) and outside the city (control site, 20 trees of each species). Leaf fall in city ash trees was recorded from November 1st to 4th and 5-8 days prior to the leaf fall in elms (p ≤ 0.01). Elm trees in the control group shed their leaves 10 days later compared to the city trees, i.e., on average, on November 25th (p ≤ 0.01). Ash trees in the control group shed their leaves earlier than the elm control group, on November 11th (p ≤ 0.001). In the city streets, the average fluctuating asymmetry ranged from 0.065 to 0.086 (point 1), from 0.049 to 0.078 (point 2) and from 0.063 to 0.082 (control site, near the highway).

STUDY OF MORPHOLOGICAL FEATURES AND FLUCTUATION ABILITY OF THE LEAF APPARATUS OF THE SILVER BIRCH

2021 ◽  
pp. 116-122
Author(s):  
S. A. КАBANOVA ◽  
Keyword(s):  
Negative Impact ◽  
Morphological Characteristics ◽  
Ecological Monitoring ◽  
High Elevation ◽  
Asymmetry Index ◽  
Morphological Features ◽  
Silver Birch ◽  
Birch Forest ◽  
Observation Methods ◽  
Green Zone

As a result of the increasing anthropogenic and technogenic impact on forest ecosystems, ecological monitoring over the changing indicators of growth and condition of trees has acquired a particular importance. Along with many traditional observation methods based on the analysis of water, soil and air samples, methods of bioindication of the assimilation apparatus have recently been used, which show the level of changes in the morphological characteristics of trees depending on the external negative impact of the environment. The purpose of the research is to determine the state of silver birch forest cultures in the green zone of a city of Nur-Sultan using bioindication methods. The object of research was the assimilation apparatus of 12-year-old silver birch forest cultures which at the age of 7 were transplanted from the strips to the spaces between strips. The morphological features and fl uctuating asymmetry of the leaves were studied. The crops of silver birch were classified as weakened plantations with a coefficient of relative viability of 54.2-73.0%. In 2019, the average level of deviation from the norm corresponded to the crops transplanted at a low elevation and non-transplanted at a high elevation, a slight deviation from the norm was observed in trees transplanted at a higher elevation. In 2020, condition of silver birch plantings decreased to the 4th point of the asymmetry index. The deterioration of the condition of trees is associated with an increasing anthropogenic load on plantations and environmental pollution. Since the pressure of these negative factors on the environment will not decrease, but will only exponentially rise, it is proposed to start taking measures to increase the sustainability of plantings (thinning, use of fertilizers, and addition of growth stimulants, etc.).

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