ECOLOGICAL STRUCTURE OF DOTHIDEOMYCETES IN THE STEPPE ECOSYSTEMS OF THE STEPPE ZONE OF UKRAINE
Naukovì dopovìdì Nacìonalʹnogo unìversitetu bìoresursiv ì prirodokoristuvannâ Ukraïni,
Journal Year:
2024,
Volume and Issue:
109(3)
Published: Jan. 1, 2024
The
article
considers
the
ecological
structure
of
Dothideomycetes
and
peculiarities
its
formation
in
conditions
steppe
ecosystems
zone
Ukraine.
materials
work
were
original
mycological
collecting
carried
out
within
survey
this
territory
during
2008-2020,
sporadic
collections
2021
2023,
as
well
herbarium
M.
G.
Kholodny
Institute
Botany
(KW).
Herbarium
collection
identification
samples
performed
accordance
with
generally
accepted
methods
cameral
processing
xylotrophic,
herbotrophic
coprothrophic
micromycetes.
As
a
result
our
research,
characteristic
features
investigated
mycobiota
established.
According
to
substrate
specificity,
among
species
found
communities,
herbotrophs
(74
species)
dominate,
xylotrophs
(28
species),
phyllotrophs
(14)
coprophiles
(7)
are
also
represented.
Phytotrophic
micromycetes
develops
on
120
vascular
plants,
largest
number
(65
noted
plants
Asteraceae.
By
trophic
specialization,
vast
majority
considered
belong
saprotrophs
(103
but
there
representatives
pleomorphic
hemibiotrophs
(20
species).
Some
hemibiotrophic
at
saprotrophic
stage
life
cycle
do
not
have
strict
limitation,
just
like
obligate
saprotrophs.
Species
fungi
discussed.
A
comparison
specificity
studied
showed
that
arid
sandy-steppe
sagebrush-steppe
plant
wider
distribution
herbosaprotrophic
is
observed
meadow-steppe
communities.
comparative
analysis
composition
forest
communities
revealed
13
general
species,
which
10
different
substrates.
most
significant
biological
Ukraine
stable
consortium
relationships
considerable
variety
higher
zonal
seasonal
change
habitats
adaptive
mechanism
for
settlement
fungi.
prospect
further
research
study
changes
under
anthropogenic
influence
Language: Английский
Effects of grassland degradation on soil ecological stoichiometry and soil microbial community on the South of the Greater Khingan Mountains
Frontiers in Microbiology,
Journal Year:
2024,
Volume and Issue:
15
Published: Nov. 18, 2024
Grassland
which
covers
40%
of
terrestrial
land
is
an
important
ecosystem
having
a
multitude
functions,
has
suffered
various
degrees
degradation
with
the
interaction
between
global
climate
change
and
unreasonable
human
utilization
(e.g.,
grazing
reclamation).
Improved
understanding
soil
microbial
community
diversity
during
meadow
steppe
crucial
for
predicting
mechanisms
restoration
strategies.
Here,
we
used
Illumina
sequencing
technology
to
investigate
patterns
structure
driving
factors
its
across
different
[i.e.,
non-degraded
grasslands
(NDG),
lightly
degraded
(LDG),
moderately
(MDG),
severely
(SDG)]
south
Greater
Khingan
Mountains.
Our
results
showed
significant
variation
in
properties,
enzyme
activity,
metal
elements
meadows.
Soil
available
phosphorus
(AP),
urease
(UE),
cellulase
(CL)
soils
increased
intensity
grassland
degradation.
significantly
decreased
bacterial
fungal
richness.
In
addition,
relative
abundance
Firmicutes
(from
1.65%
5.38%)
Myxococcota
2.13%
3.13%).
Degradation
considerably
Ascomycota
66.54%
75.05%),
but
Basidiomycota
18.33%
9.92%).
The
nitrogen
fixation
cellulolysis
due
For
functional
guilds,
pathotrophs
while
saprotrophs
increasing
severity
Total
(TP),
AP,
potassium
(AK),
manganese
(Mn),
lead
(Pb),
UE,
sucrase
(SC),
alcalase
protease
(ALPT)
were
main
drivers
composition,
TP,
AK,
Pb,
SC
composition
grassland.
findings
demonstrated
that
severe
enormous
effect
on
communities
physicochemical
dynamics.
These
improve
our
theoretical
interactions
populations
environmental
variables
Language: Английский