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Документ An annotated checklist of myxomycetes from the Seychelles Islands, Indian Ocean(Finnish Mycological Society, 2020) Kryvomaz, Tetiana; Michaud, Alain; Stephenson, Steven L.; L.The checklist provided herein contains 143 species and infra-specific taxa of myxomycetes representing six orders, 12 families and 29 genera known from the Seychelles Islands. These records are the result of 878 field collections and 468 samples processed with the use of the moist chamber techinque. The overall study involved expeditions to the granitic group of islands Mahé, Praslin, La Digue, Curieuse, Félicité, and data from the literature for the coral Aldabra atoll. The taxonomic structure of the myxomycete biota for the islands studied indicates a predominance of members of the order Physarales (74 taxa). The main genera are Physarum (38 species and two varieties), Didymium (17 species), Cribraria (11 species), Arcyria (eight species) and Stemonitis (six species and two varieties). For all six islands only a single species of myxomycete (Physarum crateriforme) was shared in common. For the total assemblage of species recorded from all of the islands, 4% species were abundant, 12% species were common, 29% were found occasionally, 42% were rare, and 13% species had only a single record. The most abundant species were Arcyria cinerea, A. denudata, Diderma effusum, Hemitrichia calyculata, Physarum compressum, and P. melleum. Based on data from 50 different localities with 90 collecting plots, 32% of all specimens were associated with coastal vegetation, 30% with lowland localities, 19% with intermediate forests, 9% with riverine forests, 8% with mountain forests, and only 2% with mangrove swamps. In general, this annotated checklist clearly shows that isolated tropical islands can support a diverse assemblage of myxomycetes.Документ Assessment environmental safety for mangrove biome(КНУБА, 2016) Kryvomaz, TetianaMangrove ecosystem was analyzed from ecological safety point of view. The comparison anthropogenic impact on some mangrove biome in Brazil and Seychelles show that mangrove in Brazil affected by industrial and anthropogenic loading, whereas on Seychelles recreational disturbance and pollution are biggest problems for mangrove. Threats to mangrove ecosystem include: clearing, overharvesting, water reduce, overfishing, coral reefs destruction, pollution, climate change. Analyses of mangrove soil find big transformation ratio soil elements to mobile forms for Fe (Ks-mf =253,81) and Cu (105,45), which is make this metal accessible for other living organisms and return to nutrient cycle. Mangrove systems support a range of species and provide a number of essentials for many different living organisms. The ability myxomycetes Hemitrichia serpula accumulate Ca (Ka = 443,69) and Zn (247,41) from environ-ment was discover; Ni (60), Mn (16,04) and Pb (11,94) also show high level elements concentra-tion in compere with their content in soil. Mangroves provide a wide range of goods and ecosys-tem services with great economic and environmental consequences. Risk for mangrove assess by exceeding the rate of the disappearance and reduces the capacity to function effectively as a viable ecosystem.Документ Myxomycete biodiversity on five islands of the Seychelles(Magnolia Press, 2020) Kryvomaz, Tetiana; Michaud, Alain; Stephenson, Steven L.A survey of myxomycete diversity on five islands of the Seychelles yielded 105 species and 10 infra-specific taxa, which included 89 species on La Digue, 66 on Praslin, 63 on Mahé, 31 on Curieuse and 4 on Félicité. Among these records, 64 species are new for the Seychelles and together with data from the literature, 143 species of myxomycetes are now known for all of the Seychelles. Most collecting on all five islands was carried out in low elevation areas. Forty-four species (73% of all specimens of myxomycetes) were found in low-elevation localities, and among these were Arcyria helvetica,Dictydiaethalium dictyosporum, Echinostelium paucifilum, Physarum aeneum, Ph. echinosporum, Reticularia olivacea, and Stemonaria longa. From 54 species of plants used by myxomycetes as substrates, eight species provided 63% of the specimens of myxomycetes, with most samples recorded from Calophyllum inophyllum. On the basis of substrate type, myxomycetes were distributed as follows: 37% of specimens were collected on dead wood and decaying palm stems, 16% on the bark and stems of living plants, 25% on ground litter, and 22% on aerial litter. A comparison of the assemblages of myxomycetes found in zones with different levels of human impact indicated that 84 species were found in forests, 74 in anthropogenic areas, and 62 in recreational coastal areas. The Seychelles provide a good background for a high level of myxomycete diversity, as a consequence of favorable climatic conditions and their location between Asia and Africa.Документ The assessment of heavy metal accumulation by myxomycetes(KNUCA, 2015) Kryvomaz, TetianaThe assessment of heavy metal accumulation by myxomycetes (slime moulds) has been made. The importance of these organisms for environmental safety monitoring was specified. Ecological and physiological mechanisms of ability of myxomycetes to concentrate metals and other elements from their substrates were analyzed. For five common myxomycetes species with relatively big fruiting body were compared chemical elements concentrations. Fuligo septica (L.) Wigg. was proposed as perspective bioindicator for the detection of Zn on the grounds of the ability to accumulate this metal and by reason of this species have widespread distribution in terrestrial ecosystems. Prospects of using slime molds as objects for bioremediation of contaminated soils were considered.