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Airborne Fungi in Arctic Settlement Tiksi (Russian Arctic, Coast of the Laptev Sea)

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Airborne Fungi in Arctic Settlement Tiksi (Russian Arctic, Coast of the Laptev Sea) CZECH POLAR REPORTS 7 (2): 300-310, ASSW 2017 Airborne fungi in arctic settlement Tiksi (Russian Arctic, coast of the Laptev Sea) Irina Yu. Kirtsideli1, Dmitry Yu. Vlasov1*,2, Evgeny V. Abakumov2, Elena P. Barantsevich3, Yuri K. Novozhilov1, Viacheslav A. Krylenkov2, Vladimir T. Sokolov4 1Botanical Institute of Russian Academy of Sciences, 197376, Prof. Popov st. 2, St. Petersburg, Russia 2Saint-Petersburg State University, 199034, Universitetska nab. 7-9, St. Petersburg, Russia 3Northwestern Almazov Federal medical research center of the Russian Federation Ministry of 3 Health, 197341, Akkuratova st. 2, St. Petersburg, Russia 4Arctic and Antarctic Research Institute, 19939, Bering st. 38, St. Petersburg, Russia Abstract Biodiversity and number of airborne fungi isolated from indoor and outdoor air of differ- ent location in the areas of arctic settlement Tiksi (Russian Arctic) are described. Dif- ferent locations (coastal areas, landscape, streets of Tiksi, abandoned empty houses, flats, public buildings) were observed. Aeromycota characterized by a significant biodiversity (50 species), but only several species were abundant. Airborne fungal spores concen- tration (CFU) in Tiksi locations was found low. The maximum spore concentrations were observed in air of the abandoned empty houses (inhabited in the past). Many species common for soil were observed at the samples taken at streets and abandoned buildings. Most of them are also known as inhabitants of building materials. Microfungi CFU at settlement territory was twice as high as natural territory. Phospholipase, albumi- nase and hemolytic activities of microfungi isolates as well as their relation to tempera- ture were studied. Most of the tested isolates demonstrated high levels of all the tested activities. It was concluded that there is a risk of ‘‘mold’’ allergy diseases for the people especially with weakening of immunity at arctic settlement Tiksi. Main sources of the air contamination in arctic settlements and houses could be many anthropogenic substrates which were colonized by soil fungi. Key words: airborne microfungi, Arctic, indoor and outdoor air, colony forming units, anthropogenic influence, exoenzyme activity, potential virulence DOI: 10.5817/CPR2017-2-29 ——— Received May 29, 2017, accepted November 14, 2017. *Corresponding author: D. Vlasov <[email protected]> Acknowledgements: The work was supported by the Russian Scientific Foundation (project 17-16- 01030, identification of the fungi species), Russian Foundation of the Basic Research (projects 16- 04-01649, 16-34-60010, field works in season of 2016), framework of the Governmental project according to the plan of theme BIN RAN, theme № 01201255604 (comparative analysis of mycobiota from different habitats) and the Program of fundamental research by the Presidium of the Russian Academy of Sciences (analysis of microfungi enzymatic activity). 300 I. YU. KIRTSIDELI et al. Introduction Fungi are cosmopolitan organisms and poral distribution of airborne fungal spores colonize various substrates in all climate have been conducted in different regions zones at the Earth. Preliminary contamina- of the world (Marshall 1997a, Ščevková et tion and colonization of natural and anthro- al. 2010, Grinn-Gofroń et Bosiacka 2015). pogenic substrates is connected with the It is important to note that a consider- diversity and number of spores or cells of able part of the Earth biosphere is consti- microfungi in the atmosphere (air environ- tuted by psychrosphere with temperatures ment). It was shown that the concentration under 5ºC (Biedunkiewicz et Ejdys 2011). and diversity of microorganisms in the air The active exploration of the Arctic and are changed with location and altitude Antarctic comprising a wide range of hu- (Smith et al. 2009). They vary with time of man activities has a significant impact on a day, weather, season, and the presence of the ecosystems of high-latitude regions. local spore sources (Lacey 1981). Microor- Special attention is paid to the safety of ganisms can spread to various altitudes by human activity in the severe climate of the different vectors (wind, air traffic, volcanic inaccessible and remote areas. However, activity, marine water, anthropogenic ways aeromycological studies from the cold (Griffin 2004, 2007; Griffin et al. 2011). World regions are limited and scattered Fungal spores are the significant frac- (Johansen et Hafsten 1988; Johansen 1991, tion of airborne microbiota. They have im- Li et Kendrick 1995, Marshall 1997a, b; portant health implications for allergy and Bilasiewicz et Czarnecki 1999, Morris et asthma sufferers. Mould growth may con- al. 2008, Duncan et al. 2010, Kirtsideli et tribute to sick-building syndrome and other al. 2011). The goal of this work was to study environmental health problems (Singh 2001) . the airborne fungi biodiversity of natural Indoor air mycobiota is an important part and anthropogenically altered ecosystems of bioaerosols in practically all types of in the local area of the Arctic settlements buildings and premises. It can affect both as well as experimental study of fungal re- biodeterioration of building constructions lation to the temperature and their potential and human health (Gravesen 1979). During pathogenicity. All these make it possible to the last decades, a list of saprotrophic fun- understand the ways of migration and dis- gi reported as new human pathogen has in- tribution of microorganisms in the Arctic creased significantly (Anaissie et al. 2009). as well as to estimate the level of anthro- Extensive studies on spatial and tem- pogenic influence on polar ecosystems. Material and Methods Study area Tiksi is an urban locality (settlement) peratures below zero from October through and the administrative center of the Bulun- May. The warmest month of the year is Ju- sky District of the Sakha Republic (Russia), ly, with an average temperature of 11.5°C. situated on the Arctic Ocean coast. The January is the coldest month of the year name Tiksi means "a moorage place" in (Fig.1). Tiksi has a very dry climate which Sakha language. Latitude 71° 38’ N, longi- can be classified as a desert climate. The tude 128° 52’ E. It is one of the principal majority of Tiksi's precipitation falls during ports providing an access to the Laptev the summer months. Sea. Tiksi's winters are very cold with tem- 301 AIRBORNE FUNGI IN ARCTIC SETTLEMENT TIKSI Fig.1. Temperature graph Tiksi ([2]). Sampling and laboratory study The investigated area is located in arc- Microfungi carry into pure culture on Cza- tic tundra (Fig. 2). Sampling was done in pek agar and identified after sporulation ap- 2012 and 2015 within the seasonal works peared with using optical microscopy ap- of the Russian High-Latitude Expedition. proach and standard mycological literature. More than 350 samples of the indoor and Stock cultures for further experiments were outdoor air were taken by use the sampling kept on Czapek agar. devices PU-1B (Russia, HIMKO) and Bur- Identification of some species was made kard (United Kingdom, Burkard). Microor- by molecular methods by the analysis DNA ganisms from all samples were sedimented region containing internal transcribed spac- on the Petri dishes with agar media (Cza- ers ITS1 and ITS2. DNA was isolated from pek agar, Saburo agar, meat peptone agar 5-day fungal cultures. The DNA region – MPA, ammonia starch agar – ASA). containing the internal transcribed spacers Sampling was made in different locations ITS1 and ITS2 was amplified with the prim- of the settlement Tiksi (Fig. 2). ers ITS-1 (5'-TCCGTAGGTGAACCTG Sampling was made in different loca- CGG-3') and ITS-4 (5'-TCCTCCGCTTAT tions of the settlement Tiksi: 1) coastal are- TGATATGC-3') (Hsiao et al. 2005, Li as (control), 2) stone and placard tundra, et al. 2007). The resulting nucleotide se- march (control), 3) central streets of Tiksi, quences were compared by the BLAST 4) abandoned empty houses (2, 3 and 5 program (Basic Local Alignment Search floor buildings), 5) flats, 6) public build- Tool, public domain software,) with the ings (shops, post, airport). The sampling nucleotide sequences available in the open was done at the height of approximately database on the NCBI site. 1 m above ground. The volume of air pass- The names and status of fungal taxa ed through on a Petri dish with the medi- were unified using by database CBS ([1]). um was from 100 to 1500 liters, depending Relation of the obtained isolates to temper- on the estimated number of spores in the ature factor was studied on Czapek agar air. After 10-30 days of cultivation (at tem- and PMA at temperature 3-4°C, 14-15°C, perature 10°, 25°C) colonies were counted. 25°C. 302 I. YU. KIRTSIDELI et al. Fig. 2. Location of the study place: 1 – coastal areas, 2 – landscape, 3 – streets of Tiksi, 4 – abandoned empty houses, 5 – flats, 6 – public buildings. Phospholipase activity (without distinc- beads. Then a 5 ml sample was aseptically tion for phospholipase types) was meas- added to each 95 ml of blood agar plates at ured using egg yolk containing medium 45°C. Antibiotics (penicillin or erythromy- (Fotedar et Al-Hedaithy 2005). Fungal cul- cin 0.05 g l-1) were added to prevent bac- tures were incubated at 15°C temperature terial growth. The zone of surrounding the for 10-30 days. Then the colony diameter colonies was measured after 10-30 days of and zone of clarification were measured and incubation and change of medium color phospholipase activity coefficient was cal- (from red to green-brown color) was fixed. culated according to the formula: The zone of alteration surrounding the col- -1 Pz = 1 – Dc(Dc + Dca) Eqn.1 onies was measured after 10-30 days of Pz – phospholipase activity index, Dc – the incubation as zone of clarification (α) or colony diameter, Dca – the clarification zone change of color (β) (from red to green- diameter. brown color). Hemolytic activity index was Albumenize activity was measured using calculated by the same formula as the one egg albumen (Bilay 1982).
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