Biodiversity and dynamics of plant groups of Chebket El Melhassa region (Algeria)

Benchohra, Maamar; Nouar, Belgacem; Soudani, Leila; Maatoug, M.; Kharytonov, Mykola; Wiche, Oliver; Жуков, О. В.

doi:10.15421/011810

Cited by 11 publications

(6 citation statements)

References 20 publications

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“…Increased soil density has a negative effect on the living conditions of higher plants because it limits the development of plant root systems. Living conditions for lower plants, including algae, which are a trophic target for micromolluscs, are also deteriorating (Maamar et al, 2018). Thus, recreation is an essential factor that structures the spatial organization of the community of soil micromolluscs.…”

Section: Discussionmentioning

confidence: 99%

Spatial Organization of the Micromollusc Community under Recreational Load

et al. 2021

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The recreational load is an important factor in transforming the living conditions of living organisms in the urban environment. This article examines the role of recreation as a driver of the changing habitat of soil micromolluscs in the park environment in an urban landscape. The hypothesis that recreational exposure changes the hierarchical organization of the spatial distribution of the micromollusc community was tested. An experimental polygon was located in Novooleksandrivskiy Park (Melitopol, Ukraine) and represented 7 transects with 18 test points in each. The set of soil properties explained 24.7% of the variation in the mollusc community. The distance from trees was able to explain 6.8% of mollusc community variation. The distance from recreational pathways was able to explain 12.2% of the variation in the mollusc community. The spatial eigenfunctions were able to explain 54.2% of mollusc community variation. The spatial patterns of variation in the structure of the assemblage of molluscs were found to be due to various causes. Thus, the broad-scale component was due to the distance from trees and the distance fro m the recreational pathways and was associated with the variability of soil penetration resistance, aggregate structure, electrical conductivity, soil moisture and density. The recreational load is the cause of this pattern formation. In turn, the medium-scale component reflected the influence of soil aggregate composition on the mollusс community and components independent of soil properties. The fine-scale component reflected the variability of the mollusc community, which was independent of soil properties.

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Section: Discussionmentioning

confidence: 99%

Spatial Organization of the Micromollusc Community under Recreational Load

et al. 2021

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“…In addition to factors influencing the urban environment, park areas are also influenced by the recreational function [51][52][53]. To some extent, the function of recreation and other ecological functions of urban parks are antagonistic [54,55]. Obviously, in the management of parkland it is necessary to look for the optimal solutions, as a result of which the parks can effectively perform both ecological functions and be an area for recreation.…”

Section: Research Aim and Objectivesmentioning

confidence: 99%

Spatial variation of soil temperature fields in a urban park

Kulish

2022

IOP Conf. Ser.: Earth Environ. Sci.

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Soil temperature is the most important factor that regulates the rate of physical, chemical and biological processes in the soil. A peculiarity of the urban environment is the occurrence of “heat islands”. The increased temperature of urban environment significantly changes environmental conditions and contributes to the activation of phenomena that lead to the acceleration of global climate change. The aim of the work is to reveal the patterns of spatial variation of soil temperature in a city park at the different scale levels. Soil temperature was measured on a regular grid with different lags between measurement points. The measurement results were processed using geostatistical methods to quantify the spatial process at different scales. The results obtained allowed to quantify the patterns of spatial variability of temperature fields at different hierarchical levels. Scale-dependent effects of soil temperature variation were identified. The role of stand density, litter depth, and soil moisture on soil temperature variation was found. The results of the study are the basis for developing an optimal soil temperature measurement plan for environmental monitoring purposes. Suggestions were also made for the management of park stands in order to reduce the temperature load. The spatial variation in soil temperature demonstrates the occurrence of scale-dependent patterns. The spatial organization of temperature fields must be taken into account for optimal environmental monitoring and urban environmental management strategies. The soil temperature regime is characterised by a significant level of stability compared to air temperature. The soil temperature fields in an artificial park plantation are characterized by spatial patterns of a complex nature. The temperature field presents a spatial component that is invariant to time. It is most likely that the spatial variability of soil properties induced by natural factors and recreation are the cause of the generation of this pattern. Also in the soil temperature field there is a spatial pattern, which reflects the different sensitivity of the soil to the seasonal trend of temperature change. The generation of this pattern is due to the different insulating capacity of the forest litter in the park plantation. The results obtained point to the important role of leaf litter as a factor in the dynamics of the soil temperature regime. It is hypothesized that leaf litter in the park contributes to the enhancement of carbon sequestration during winter time.

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“…Оцінка оптимального рівня фактора для життєдіяльності виду та толерантності виду до дії такого фактора може бути здійснення різними способами. Середнє зважене може давати незміщені оцінки за умов симетричного розподілу відгуку виду (Diekmann & Dupré, 1997;Carlisle et al, 2007;Zelený & Schaffers, 2012;Maamar et al, 2018). Симетричний відгук, наближений до гаусової дзвоноподібної кривої, добре може бути змодельований за допомогою регресійного підходу (Cajo J.F.…”

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Temporal Dynamics of the Terrestrial Invertebrate Community Under Conditions of Land Reclamation

Fedyushko¹,

Babchenko²

2021

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The article demonstrates how the variability of water content in technosols affects the temporal dynamics of terrestrial invertebrates and finds the properties of species response curves to soil water content. The hypothesis that the effects of soil moisture on terrestrial invertebrate populations and communities depend both directly on soil water content and on other environmental factors and spatial and temporal variables was tested. It has been shown that in order to determine the real values of the optimum and tolerance of species, it is necessary to first extract the influence of other factors on their response. The study was conducted at the research center of the Dnipro State Agrarian and Economic University (Pokrovsk, Ukraine). To study the spatial and temporal variability of abundance, species richness and species composition of invertebrate communities at the experimental site, animals were collected using Barber traps. The range of moisture available to plants, precipitation, wind speed, air temperature (daily minimum, daily maximum, mean daily temperature), atmospheric humidity, and atmospheric pressure were used as environmental predictors of the invertebrate ecological niche. Two-dimensional geographic coordinates of sampling points were used to create a set of orthogonal spatial variables based on eigenvectors. Each of the vectors represents a paternoster of a certain scale within the sampling area. Similarly, only a one-dimensional series of dates during which sampling was conducted was used to create a set of temporal variables based on eigenvectors. Each of the vectors represents a paternoster of a certain scale within the time period under study. Spatial and temporal variables are used as spatial and temporal predictors of species recall. 257437 invertebrates (Arthropoda and Mollusca) were collected from 6 classes, 13 series, 50 families, and 202 species or parata xonomic units. The distribution of moisture content indicators available to plants, weighted by animal abundance, is polymodal and can be represented as a mixture of three normal distributions. Fractionation of community variability in relation to meteorological data, spatial and temporal predictors, and type of technozem was performed based on two ordination methods (CCA and RDA). The fractionation of community variation based on the CCA-procedure indicates the grea test role of complex factors that result from the interaction of temporal and spatial predictors as well as temporal, spatial and meteorological factors. The results based on the RDA-procedure also indicate a significant role in the interaction of meteorological and temporal factors. These results indicate the need to isolate the role of soil moisture factor interaction with other factors to assess the effect of soil moisture on invertebrate community dynamics.

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Biodiversity and dynamics of plant groups of Chebket El Melhassa region (Algeria)

Cited by 11 publications

References 20 publications

Spatial Organization of the Micromollusc Community under Recreational Load

Spatial Organization of the Micromollusc Community under Recreational Load

Spatial variation of soil temperature fields in a urban park

Temporal Dynamics of the Terrestrial Invertebrate Community Under Conditions of Land Reclamation

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