Am. Khallil et al., SEASONAL FLUCTUATIONS OF AQUATIC FUNGI RECOVERED FROM EGYPTIAN SOIL (DELTA REGION), Journal of basic microbiology, 35(2), 1995, pp. 93-102
One hundred and eleven identified and seven unidentified species in ad
dition to 5 varieties belonging to forty-three aquatic fungal genera w
ere recovered from 452 soil samples collected randomly from different
localities in Nile Delta and Suez canal regions including eleven gover
norates. The investigated soil samples were collected seasonally durin
g the period from autumn 1990 to summer 1991 (113 samples each season)
. The richest season (85 identified and 5 unidentified species in addi
tion to 2 varieties) in aquatic fungi was the winter season (10.0-15.5
degrees C) whereas the poorest (32 identified and 5 unidentified spec
ies in addition to one variety) was summer (24.0-27.5 degrees C). The
richest soil samples in aquatic fungi were those of low or moderate te
mperature seasons, high contents of organic matter and considerably po
or in total soluble salts. The pH value did not show any regular seaso
nal variation and did not exhibit any considerable influence on fungal
populations. Some aquatic fungal genera and species were disappeared
completely in certain seasons and vice versa. The most dominant aquati
c fungal genera were Pythium, Allomyces, aqualinderella and nowa-kowsk
iella. The commonest aquatic fungal species were Allomyces anomalus, A
qualinderella fermentans, Nowakowskiella elegans, Blastocladiopsis par
va and Dictyuchus sterilis.