Soil algae of the oak groves of the Steppe zone of Ukraine

Maltseva, І. А.; Maltsev, E.I.; Солоненко, А. Н.

doi:10.15407/alg27.03.323

Cited by 3 publications

(3 citation statements)

References 10 publications

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“…It is known that the spread of algae and cyanoprokaryotes in the soil is not limited to this depth. Their living cells have been found at the depth of 120 cm (Maltseva and Pysanets 2004;Shekhovtseva and Maltseva 2015;Maltseva et al, 2017) and more (Gollerbah and Shtina, 1969). They are diffusely dispersed along the soil profile and cannot perform functions peculiar to biological soil crust.…”

Section: Discussionmentioning

confidence: 99%

Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

Shcherbyna

Maltseva

Maltsev

et al. 2017

Regul. Mech. Biosyst.

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The study of the processes of restoration of species richness and productivity of steppe ecosystems after fires is an urgent problem that affects not only the conservation of biodiversity but also the maintenance of pasture resources. This article presents the results of a study of post-pyrogenic effects in steppe ecosystems, taking into account changes in the species composition of cyanoprokaryotes and algae that are art of the biological soil crust, which performs ecologically important functions in xerophytic ecosystems. The investigations were carried out in virgin and postpyrogenic steppe ecosystems of the "Troitsk Clough" reserve (Zaporizhia region, Ukraine). For three years, the dynamics of the projective cover and the height of the vegetation cover in virgin areas of herbs-fescue-feather-grass and fescue-feather-grass steppes was studied as well as within two ecosystems of post-pyrogenic development after fires that occurred in the spring and winter periods. We discovered that restoration of the herbs-fescue-feather-grass and fescue-feather-grass steppes after fires occurs at different rates. The cause of the slow restoration of vegetation cover can be its severe damage by fire at the beginning of the vegetation season and the development of erosion processes. The number of species of cyanoprokaryotes and algae in the biological soil crust of virgin and post-pyrogenic ecosystems is not significantly different. It varies from 35 to 49 species. The greatest diversity is noted for Cyanoprokaryota. Chlorophyta is in the second place. Among the dominants, the filamentous forms of Cyanoprokaryota prevail. Nostoc edaphicum was noted as a nitrogen fixing representative. The similarity of the species lists of cyanoprokaryotes and algae of post-pyrogenic and virgin ecosystems, according to the calculated Jaccard coefficient, varies from 49.1% to 55.3%. This indicates a strong specificity of the composition of cyanoprokaryotes and algae in post-pyrogenic biological soil crusts. Changes in their composition reflect different stages of post-pyrogenic succession. In the first year after a fire, there is a slight increase in species richness, which is a consequence of the favorable effect of increasing the amount of mineral substances in the soil after the organic matter has burned out. The "pioneer" group includes: Phormidium autumnale, Ph. dimorphum, Ph. retzii, Ph. (Leptolyngbya) henningsii, Luticola mutica, Hantzschia amphioxys. Gradually this effect is leveled and the species richness of cyanoprokaryotes and algae is stabilized at a level peculiar for this type of ecosystem.

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Section: Discussionmentioning

confidence: 99%

Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

Shcherbyna

Maltseva

Maltsev

et al. 2017

Regul. Mech. Biosyst.

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“…Твердість ґрунту безпосередньо впливає на формування структури рослинного покриву (Medvedev, 2009), на структуру тваринного населення, діючи на кількісний і якісний склад популяцій даної території (Zhukov & Andrusevich, 2013). Як відомо, з поглибленням у ґрунт умови для підтримання життєдіяльності погіршуються, що є одним із факторів зниження чисельності ґрунтових водоростей (Maltseva, 2005), ґрунтової мезофауни (Kulbachko, 2006), кількості коренів деревних і трав'янистих рослин (Ivanko, 2004). У формуванні екологічної ніші значимість твердості ґрунту на малих глибинах (0-10 см) розглядають як результат прямої дії цього фактора.…”

Section: обговоренняunclassified

Peculiarities of the spatial organization of the ecological niche of Vallonia pulchella (Muller, 1774) on the pedozems of the Nikopol manganese ore basin

Umerova¹

2020

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As a result of the experiment, the ecological niche of the micromollusc Vallonia pulchella on artificial soil-like structures was investigated, with use of the edaphic and phytoindication indices. The study was conducted in June 2019 at a research path within the Nikopol manganese ore basin (on pedozem). The experimental polygon consisted of 105 samples located within 7 transects (15 samples each). The distance between the rows in the polygon is 3 m. The average density of the investigation object is 1.18 specimens/m 2 . It is shown that the spatial organization of the micromollusc is structured under the influence of edaphic and phytoindication indices. The edaphic and plant factors can be considered as determinants of the ecological space of V. pulchella, which is accomplished within the framework of the theory of ecological niche. It is established that the average soil hardness increases with depth down the profile. The influence of the hardness of deep soil layers on the distribution of mollusсs, which occur mainly on the surface, can be considered as a result of indirect influence through the structure of vegetation. Micromolluscs give an advantage to the places with a dominance of aggregates, which belong to the category of agronomically valuable (size from 1-2 to 3-5 mm). Small (less than 0.25-0.5-1.0 mm) and large aggregates (more than 10 mm) negatively affect the number of V. pulchella. Phytoindication scales act as valuable indicators to describe the properties of the ecological niche of the investigated object. The micromolluscs V. pulchella give an advantage to the areas with high levels of carbonic salts, as well as with a low content of free nitrogen in the soil. The indicators of ombroclimate and termal conditions contribute to the increase in the number of molluscs. Further research will be directed to study the impact of vegetation on the ecological niche of the micromollusc Vallonia pulchella (Muller, 1774) with application of geostatic analysis.

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“…Algae can grow even in very harsh conditions: in salt lakes and deserts, where cultivation of plants is not practiced and even impossible (Round, 1984;Ramanan et al, 2016). In addition, algae play an important role in the accumulation of excess carbon dioxide from the air, produce a number of useful by-products that can be used as feed additives in fish farms and livestock farms or can be considered as promising source of fucoxanthin (Petrushkina et al, 2017), carotenoids (Maltseva et al, 2017). The aim of this article work is discussion of the features and problems of using algae biomass to produce biodiesel.…”

Section: Introductionmentioning

confidence: 99%

Radio monitoring of plant products and soils of Polesia, Zhytomyr region, during the long-term period after the disaster at the Chornobyl Nuclear Power Plant

Maltsev

Коноваленко

Barantsova

et al. 2017

Regul. Mech. Biosyst.

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The article highlights the consequences of the Chernobyl disaster. Northern Polesia has been and still remains the most polluted area. Full scale and limited economic activity is carried out on part of the contaminated territories. The zone of radioactive contamination includes half of the territory of this region, one third of the agricultural land and almost the same amount of the arable land. 9 districts, 734 towns and villages are located within the zone of radioactive contamination. In the long-term period after the disaster the situation in contaminated areas has improved and become predictable due to natural processes of recovery and implementation of countermeasures based on results of monitoring. However, until today regions of Ukrainian Polesia continue to produce agricultural products which do not meet the requirements of government regulations concerning the content of radionuclides in food and appear to present a threat to consumers. To assess the accumulation of 137Cs in plant products, we investigated the activity of these radionuclides in potatoes, vegetables, root crops and grains, and calculated the ratios of its transition from the ground to the products, which helped evaluate the intensity and amount of accumulation of radionuclides during the completion of the half-life period of 137Cs and evaluate the radiological situation in the northern regions of Polesia. The density of soil contamination with 137Cs and its specific activity in plant products grown on private plots were studied in three different districts of Zhytomyr region: Narodychi, Korosten and Ovruch. Analysis of the density of soil pollution with the 137Cs isotopes in the Northern part of Zhytomyr region in the post-disaster period shows that even 30 years after the tragedy, significant areas of arable land under certain conditions remain potentially dangerous on account of contaminated plant products. The specific activity of 137Cs in plant products grown on private plots was studied in residential places where soil contamination was detected. In particular, the list of studied crops included: potato tubers, white cabbage, fresh tomatoes, table beets, carrots, onions, beans, oat grains, corn grains. The most critical were populated areas located in zone II – village Vystupovychi of Ovruch district, village Loznytsia and village Khrystynivka of Narodychi district. In these settlements an excess of DR-2006 in plant products was noted despite the fact that an excess over the maximum permissible level of density of soil pollution was not observed. In decreasing order by the amount of CT 137Cs, we ranked crops as follows: beans > table beets > carrots > potato tubers > corn grains ˃ oats grains > white cabbage > onions > fresh tomatoes. For the population living on radioactively contaminated territories, plant products grown on private plots have been and still remain the main source of 137Cs radionuclides entering the body.

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Soil algae of the oak groves of the Steppe zone of Ukraine

Cited by 3 publications

References 10 publications

Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

Post-pyrogenic changes in vegetation cover and biological soil crust in steppe ecosystems

Peculiarities of the spatial organization of the ecological niche of Vallonia pulchella (Muller, 1774) on the pedozems of the Nikopol manganese ore basin

Radio monitoring of plant products and soils of Polesia, Zhytomyr region, during the long-term period after the disaster at the Chornobyl Nuclear Power Plant

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