BIOGENIC TURBATION OF MEADOW SOILS BY THE SPECIES OF- ANTS LASIUS FLAVUS
Journal Title: Вісник Одеського національного університету. Географічні та геологічні науки - Year 2018, Vol 23, Issue 1
Abstract
Problem Statement ami Purpose. The influence of Lasius flams ants on the bioturbation processes in soils and then properties are insufficiently studied, which determines the relevance of the research. The purpose of the research is to describe the agrophysical state of the soil in the context of influence of Lasius flams ants. The object of the research is meadow soils under grassland and ant colonies formed thereon. The subject of the research is granulometric, microaggregate, structural and aggregate composition, general physical properties of soils and ant colonies. Data & Methods. In the article, our own field and laboratory research materials were used. Common methods of soil research (comparative-geographical, comparative- profile. analytical) were used. The assessment of the physical condition of soils and ant colonies was carried out by calculating the corresponding coefficients and indicators. Results. Activity of the Lasius flams ants affected the granulometric composition of soils, no unidirectional changes were detected though. Both decrease and increase in the granulometric composition as compared to the undisturbed meadow soils have been observed. Microaggregate composition of the ant colonies as compared to the undisturbed soils is characterized by better water resistance, ability to structure formation, anti¬erosion resistance. According to the calculations, the Kachynskyi’s structural factor in the meadow soils is equal to 27.40%. the microstructure of soils is estimated as satisfactory. In ant colonies, the structural factor is 2.38-5.40%, microstructure is characterized as high. In the aggregate structure of the ant colonies, the content of agronomically valuable aggregates of 10-0.25 mm is increasing reaching the level of 53.03-83.94%. the structure is characterized as satisfactory and good. The structure coefficient varies within 1.12-7.85 which also irrdicates a satisfactory and good structure formation of soils. In ant colonies, there is a significant decrease in the structure density as compared with undisturbed soils - from 1.41 -1.44 g/cm3 to 0.78-1.08 g/cm3, which characterizes their composition as loose and rich hr organic remains. The total porosity hr ant colonies increases to 59.55-68.67%. i.e., it is characterized as excellent. Moreover, Lasius flams ants improve soils aeration. Therefore. Lasius flams ants caused changes irr the physical properties of the meadow soils, which can be assessed as positive irr the context of the agro- and ecoplrysical condition of soils.
Authors and Affiliations
V. G. Haskevych
Keywords
Related Articles
- EP ID EP508018
- DOI 10.18524/2303-9914.2018.1(32).144580
- Views 87
- Downloads 0
WORLD REFERENCE BASE FOR SOIL RESOURCES (WRB): FROM THE ESTABLISHMENT TO THE PRESENT TIME
Purpose. The WRB is a soil classification system for naming soils and creating soil map legends. The purpose of the article was to reveal the basic provisions of the new WRB version and to compare the changes of the syst...
THE MEDICAL GEOGRAPHY CONCEPTION ON DEPARTMENT OF PHYSICAL GEOGRAPHY OF THE ODESSA’ UNIVERSITY
Purpose. The purpose of thе article is to compare the state of medical geography as an academic discipline in ONU 50 years ago and today, and on this basis identify trends in the development of this important geographica...
MATHEMATICAL MODELING OF SOIL EROSION: RESULTS AND PROSPECTS
The aim of the article is to assess the results and perspectives of mathematical modeling and calculation of soil erosion as the basis of scientific justification of sustainable land use within the erosion dangerous area...
ZONES OF INTENSIVE INTERACTIONS OVER THE NORTH ATLANTIC: 850 MB GEOPOTENTIAL HEIGHT, NOVEMBER
Problem Statement and Purpose. Formation of hydrometeorological characteristics at 850 hPa level is governed with the processes of interaction of the underlying surface with the surface layer of air and, at the same time...
THE EMERGENC E OF JEWISH COMMUNITIES IN SMALL TOWNS OF THE CAPITAL SOCIO-GEOGRAPHICAL REGION OF UKRAINE: HISTORIC AL AND GEOGRAPHICAL ASPECT
Problem Statement and Purpose. Traditional culture of a certain ethnic group, serves as a tourist resource for the development of various types and forms of tourism. These resources can be divided into existing, which ca...