Daniil Vadimovich Davydov
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The influence of gray heron (Ardea cinerea L.) Nesting places on the nature of litter and soil changes in the broad-leaved forest of Tula regionMoscow University Bulletin. Series 17. Soil science. 2020. 1. p.23-29Lev G. Bogatyrev Anna I. Benediktova Philip I. Zemskov Alexander N. Vartanov Daniil V. Davydov Mikhail M. Karpukhin Yulia A. Zavgorodnaya Vladimir V. Deminread more383
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The composition of water extracts of the soil, litter and land litter was studied for the conditions of the nesting places of the gray heron and the control plots in the zone of distribution of gray forest soils of the broad-leaved ecosystems of the Tula area. It has been established that the entry of bird excreta leads to an almost universal degradation of land cover, the formation of specific litters, with a significant influx of large tree litter, which is associated with the nest building process. It is shown that the upper horizons of gray forest soil, litter and litter in nesting conditions are characterized by an increased content of such elements as calcium, potassium and magnesium, and among trace elements - copper, zinc and strontium. Among the anions in the soils and litters of bird nesting sites, an increase in the content of nitrates, phosphates and chlorine was found.
Keywords: deciduous forests; nesting sites; herons; soil; Utter; excreta; macronutrients; trace elements
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On the influence of nests of gray herons on features of layers and soils in pine ecosystems of the Moscow regionMoscow University Bulletin. Series 17. Soil science. 2022. 3. p.48-56Lev G. Bogatyrev Valeria M. Telesnina Anna I. Benediktova Marina S. Rozanova Daniil V. Davydov Mikhail M. Karpukhin Grigory S. Eremkinread more314
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Th e features of soils and litters, formed in pine ecosystems of the Moscow region, within the nesting grounds of
gray herons, have been established. It is shown that, in densely located herons’ nesting sites, in comparison with
the control plots, the total trophicity of ecosystems sharply increases, which is manifested in a wide distribution of
species characterized by high demands on the nutrient regime of soils. Th is is confi rmed by the increased content
of water-soluble forms of phosphorus, nitrates, sulfates, potassium, magnesium and calcium in the soils within the
nests of gray herons. On the contrary, the soils in the control plots are characterized by the usual content of the
main components characteristic of the soils of the zone of coniferous-deciduous forests. Taking into account the low
mobility of phosphorus and its probable fi xation in the composition of immobile complexes, it has been suggested
that the increased content of this element in soils under the conditions of the spread of soddy-podzolic soils, if the
role of anthropogenesis is excluded, may serve as an indicator of the former infl uence of ornithogenic ecosystems.Keywords: coniferous-deciduous forests; ornithogenic ecosystems; phosphorus; nitrates; trophicity
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