scholarly journals Studies of Aquatic Fungi. XXIV. Aquatic Fungi in the Water of Melting Snow

2014 ◽  
Vol 27 (2) ◽  
pp. 257-265 ◽  
Author(s):  
Bazyli Czeczuga
Keyword(s):  
Aquatic Fungi ◽  
Melting Snow ◽  
Hydrochemical Analysis ◽  
Pythium Dissotocum ◽  
Snow Samples

The work was undertaken to investigate the mycoflora in the water of melting snow. Samples of water were collected in March 1987-1988 for hydrochemical analysis (3 sites) and studies of the fungus content (9 sites). Forty-nine species of fungi were found in this waters. The following fungi unknown from Poland were found: <i>Skirgiella septigena, Monoblepharis macraodra, M. polymorpha, M. fascicutlta, M. insignis, Achlya apiculata, Apodachlya punctata, Pythium dissotocum, Hansenula holstii, H. saturnus, Actiaospora megalospora<i> and <i>Heliscus lugdunensis</i>.

scholarly journals Studies of aquatic fungi. XII. Aquatic fungi of the lowland River Biebrza

2014 ◽  
Vol 26 (1) ◽  
pp. 77-83 ◽  
Author(s):  
Bazyli Czeczuga ◽  
Lucyna Woronowicz ◽  
Krystyna Brzozowska
Keyword(s):  
Aquatic Fungi ◽  
Lowland River ◽  
Hydrochemical Analysis

The work was undertaken to investigate the mycoflora ot the lowland river Biebrza. Samples of water collected once a month over spring and autumn (1984) for hydrochemical analysis and studies of the fungus content. Twenty five species of fungi were found most of them in the river Biebrza. The following fungi unknown from Poland were found in the river Biebrza: <i>Karlingia rosea, Blastocladiella britannica, Cladolegnia eccenirica, Centrospora filiformis</i> and <i>Flagellospora cunmla</i>.

scholarly journals Aquatic fungi in the Lake Sejny complex

2014 ◽  
Vol 31 (1) ◽  
pp. 33-44 ◽  
Author(s):  
Bazyli Czeczuga
Keyword(s):  
Aquatic Fungi ◽  
Hydrochemical Analysis ◽  
First Time

The mycoflora of the Lake Sejny complex was studied. Samples of water were collected in 1990-1991 for hydrochemical analysis and determination of fungi species. In total 69 species of fungi reported for the first time from Poland (<i>Myzocylium vermicolum, Angulospora aquatica, Zoophthora rhizospora</i>).

Possible albedo reduction due to light absorbing impurities in snowpack observed at various sites

2020 ◽  
Author(s):  
Teruo Aoki ◽  
Masashi Niwano ◽  
Sumito Matoba ◽  
Tomonori Tanikawa ◽  
Yuji Kodama ◽  
...  
Keyword(s):  
Radiative Forcing ◽  
Reduction Rate ◽  
Greenland Ice Sheet ◽  
The Other ◽  
Gravimetric Measurement ◽  
Melting Snow ◽  
Melting Period ◽  
Physically Based ◽  
Antarctic Snow ◽  
Snow Samples

&lt;p&gt;Possible albedo reduction due to light absorbing impurities (LAI) in snowpack observed at various sites in the world are investigated. Reviewing previously measured black carbon (BC) concentrations, their values distribute in a range of 0.07-0.25 ppbw (ng of BC in g of snow) in Antarctica, 0.55-20 ppbw in Greenland Ice Sheet (GrIS), 4.4-87.6 ppbw for the other Arctic except GrIS, and 4-1221 ppbw for mid-latitudes. As albedo reduction rate by LAI depends on snow grain size, it is more enhanced by larger grain snow such as melt form (melting snow) than smaller grain snow such as precipitation particles (new snow). By assuming two typical snow grain radii r&lt;sub&gt;s&lt;/sub&gt; = 1000 and 50 &amp;#181;m, respectively for those snow grain shapes, the albedo reduction as a function of BC concentration can be calculated with physically based snow albedo model. The result indicates that albedo in Antarctic snow is not affected by BC in any case of snow grain radius. In GrIS albedo reduction due to BC is small around 0.006 for r&lt;sub&gt;s&lt;/sub&gt; = 50 &amp;#181;m (new snow) but it rises to 0.026 for r&lt;sub&gt;s&lt;/sub&gt; = 1000 &amp;#181;m (melting snow), suggesting a few percent of albedo reduction could occur under warmer climate condition due to enhanced snow metamorphism. In the other Arctic except GrIS, the maximum albedo reductions for r&lt;sub&gt;s&lt;/sub&gt; = 50 &amp;#181;m (1000 &amp;#181;m) are 0.015 (0.064) at the maximum BC concentration (87.6 ppbw). For. mid-latitudes, it is 0.070 (0.24) for r&lt;sub&gt;s&lt;/sub&gt; = 50 &amp;#181;m (1000 &amp;#181;m) at the maximum BC concentration (1221 ppbw). These results mean albedo reduction in highly polluted area of mid-latitudes cannot be ignored even in case of new snow and is more serious for melting snow.&lt;/p&gt;&lt;p&gt;We have conducted energy budget and snow pit observations at Sapporo (43&amp;#176;N, 141&amp;#176;E, 15 m a.s.l), Japan since 2005. In addition, elemental carbon (EC~BC) and mineral dust concentrations in snowpack were also monitored for snow samples collected twice a week from 2007 by the thermal optical reflectance (TOT) method and gravimetric measurement of a filter. During 10 years from 2007 to 2017, the medians of EC and dust concentrations are 196 ppbw and 2700 ppbw, respectively. Using those data, contribution of LAI to albedo reduction and the radiative forcing (RF) were estimated. The 10-year-mean albedo reduction and RF due to BC+dust are 0.053 and +6.7 Wm&lt;sup&gt;-2&lt;/sup&gt;, respectively, in which BC effect on albedo reduction is 5.6 times larger than dust. The albedo reduction by BC+dust for only melting period is 0.151, that is 4.8 times larger than that for accumulation period. The effect of LAI on albedo reduction is enhanced by snow grain growth as well as an increase of LAI in melting period compared to that for accumulation season.&lt;/p&gt;

Some new records of lower aquatic fungi from western Maharashtra, Maharashtra State, India.

2016 ◽  
Vol 5 (02) ◽  
pp. 4846
Author(s):  
Vaishali Shinde* ◽  
A. B. Pawar
Keyword(s):  
New Records ◽  
Aquatic Fungi ◽  
Saprolegnia Ferax

Present study deals with the study of some lower aquatic fungi different regions of Maharashtra viz., Acaulopage dichotoma Drechsler belong to family Zoophagacea (Class- Zygomycetes) while Achlya oblongata de Bary, Brevilegnia megasperma Harvey, Saprolegnia ferax (Gruith) Thuret and Saprolegnia subterranae (Dissman) Seymour belongs to family Saprolegniaceae (Class - Oomycetes). All these are new records of aquatic fungi from the Maharashtra state.

scholarly journals Research on flood forecast of dashimen reservoir in xinjiang based on melting snow and runoff yield under excess infiltration

2021 ◽  
Vol 826 (1) ◽  
pp. 012010
Author(s):  
Yi Liu ◽  
Fenglong Zhang ◽  
Haiyan Wu ◽  
Yongfeng Li ◽  
Zhiqiang Jiang ◽  
...  
Keyword(s):  
Flood Forecast ◽  
Melting Snow

scholarly journals Assessing recent measurement techniques for quantifying black carbon concentration in snow

2012 ◽  
Vol 5 (3) ◽  
pp. 3771-3795 ◽  
Author(s):  
J. P. Schwarz ◽  
S. J. Doherty ◽  
F. Li ◽  
S. T. Ruggiero ◽  
C. E. Tanner ◽  
...  
Keyword(s):  
Black Carbon ◽  
Single Particle ◽  
Carbon Concentration ◽  
Mass Concentration ◽  
Measurement Techniques ◽  
Integrating Sphere ◽  
Recent Measurement ◽  
Atmospheric Sampling ◽  
Careful Assessment ◽  
Snow Samples

Abstract. We evaluate the performance of the Single Particle Soot Photometer (SP2) and the Integrating Sphere/Integrating Sandwich Spectrophotometer (ISSW) in quantifying the concentration of refractory black carbon (BC) in snow samples. We find that the SP2 can be used to measure BC mass concentration in snow with substantially larger uncertainty (60%) than for atmospheric sampling (<30%). Achieving this level of accuracy requires careful assessment of nebulizer performance and SP2 calibration with consideration of the fact that BC in snow tends to larger sizes than typically observed in the atmosphere. Once these issues are addressed, the SP2 is able to measure the size distribution and mass concentration of BC in the snow. Laboratory comparison of the SP2 and the Integrating Sphere/Integrating Sandwich Spectrophotometer (ISSW) revealed significant biases in the estimate of BC concentration from the ISSW when test samples contained dust or non-absorbing particulates. These results suggest that current estimates of BC mass concentration in snow and ice using either the SP2 or the ISSW may be associated with significant underestimates of uncertainty.

scholarly journals Solving a long-standing enigma: Myrmicinosporidium durum belongs to Blastocladiomycota, a phylum of primarily aquatic fungi

2021 ◽  
pp. 107640
Author(s):  
Michał Gorczak ◽  
Gema Trigos-Peral
Keyword(s):  
Aquatic Fungi

scholarly journals Stable-isotope time series and precipitation origin from firn-core and snow samples, Altai glaciers, Siberia

2005 ◽  
Vol 51 (175) ◽  
pp. 637-654 ◽  
Author(s):  
Vladimir B. Aizen ◽  
Elena Aizen ◽  
Koji Fujita ◽  
Stanislav A. Nikitin ◽  
Karl J. Kreutz ◽  
...  
Keyword(s):  
Stable Isotope ◽  
Clustering Analysis ◽  
Meteoric Water ◽  
Drainage Basin ◽  
The Arctic ◽  
Deuterium Excess ◽  
Closed Drainage ◽  
Water Stable Isotope ◽  
Firn Core ◽  
Snow Samples

AbstractIn the summers of 2001 and 2002, glacio-climatological research was performed at 4110–4120 m a.s.l. on the Belukha snow/firn plateau, Siberian Altai. Hundreds of samples from snow pits and a 21 m snow/firn core were collected to establish the annual/seasonal/monthly depth–accumulation scale, based on stable-isotope records, stratigraphic analyses and meteorological and synoptic data. The fluctuations of water stable-isotope records show well-preserved seasonal variations. The δ18O and δD relationships in precipitation, snow pits and the snow/firn core have the same slope to the covariance as that of the global meteoric water line. The origins of precipitation nourishing the Belukha plateau were determined based on clustering analysis of δ18O and d-excess records and examination of synoptic atmospheric patterns. Calibration and validation of the developed clusters occurred at event and monthly timescales with about 15% uncertainty. Two distinct moisture sources were shown: oceanic sources with d-excess <12‰, and the Aral–Caspian closed drainage basin sources with d-excess >12‰. Two-thirds of the annual accumulation was from oceanic precipitation, of which more than half had isotopic ratios corresponding to moisture evaporated over the Atlantic Ocean. Precipitation from the Arctic/Pacific Ocean had the lowest deuterium excess, contributing one-tenth to annual accumulation.

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