Science,
Journal Year:
2007,
Volume and Issue:
315(5818), P. 1574 - 1576
Published: March 15, 2007
Although
the
tropics
harbor
greater
numbers
of
species
than
do
temperate
zones,
it
is
not
known
whether
rates
speciation
and
extinction
also
follow
a
latitudinal
gradient.
By
sampling
birds
mammals,
we
found
that
distribution
evolutionary
ages
sister
species-pairs
in
which
each
other's
closest
relative-adheres
to
The
time
divergence
for
shorter
at
high
latitudes
longer
tropics.
Birth-death
models
fitting
these
data
estimate
highest
recent
occur
decline
toward
These
results
conflict
with
prevailing
view
links
tropical
diversity
elevated
rates.
Instead,
our
findings
suggest
faster
turnover
contributes
Oikos,
Journal Year:
2011,
Volume and Issue:
120(3), P. 321 - 326
Published: Feb. 21, 2011
It
is
clear
that
the
majority
of
flowering
plants
are
pollinated
by
insects
and
other
animals,
with
a
minority
utilising
abiotic
pollen
vectors,
mainly
wind.
However
there
no
accurate
published
calculation
proportion
ca
352
000
species
angiosperms
interact
pollinators.
Widely
cited
figures
range
from
67%
to
96%
but
these
have
not
been
based
on
firm
data.
We
estimated
number
animals
using
unpublished
community‐level
surveys
plant
pollination
systems
recorded
whether
each
present
was
or
The
animal‐pollinated
rises
mean
78%
in
temperate‐zone
communities
94%
tropical
communities.
By
correcting
for
latitudinal
diversity
trend
plants,
we
estimate
global
animal
as
308
006,
which
87.5%
species‐level
plants.
Given
current
concerns
about
decline
pollinators
possible
resulting
impacts
both
natural
agricultural
crops,
such
estimates
vital
ecologists
policy
makers.
Further
research
required
assess
detail
absolute
dependency
their
pollinators,
how
this
varies
latitude
community
type,
doubt
plant–pollinator
interactions
play
significant
role
maintaining
functional
integrity
most
terrestrial
ecosystems.
Science,
Journal Year:
2014,
Volume and Issue:
346(6213)
Published: Nov. 28, 2014
Fungi
play
major
roles
in
ecosystem
processes,
but
the
determinants
of
fungal
diversity
and
biogeographic
patterns
remain
poorly
understood.
Using
DNA
metabarcoding
data
from
hundreds
globally
distributed
soil
samples,
we
demonstrate
that
richness
is
decoupled
plant
diversity.
The
plant-to-fungus
ratio
declines
exponentially
toward
poles.
Climatic
factors,
followed
by
edaphic
spatial
variables,
constitute
best
predictors
community
composition
at
global
scale.
show
similar
latitudinal
gradients
to
other
organisms,
with
several
notable
exceptions.
These
findings
advance
our
understanding
permit
integration
fungi
into
a
general
macroecological
framework.
Nature,
Journal Year:
2017,
Volume and Issue:
551(7681), P. 457 - 463
Published: Oct. 31, 2017
Abstract
Our
growing
awareness
of
the
microbial
world’s
importance
and
diversity
contrasts
starkly
with
our
limited
understanding
its
fundamental
structure.
Despite
recent
advances
in
DNA
sequencing,
a
lack
standardized
protocols
common
analytical
frameworks
impedes
comparisons
among
studies,
hindering
development
global
inferences
about
life
on
Earth.
Here
we
present
meta-analysis
community
samples
collected
by
hundreds
researchers
for
Earth
Microbiome
Project.
Coordinated
new
methods,
particularly
use
exact
sequences
instead
clustered
operational
taxonomic
units,
enable
bacterial
archaeal
ribosomal
RNA
gene
to
be
followed
across
multiple
studies
allow
us
explore
patterns
at
an
unprecedented
scale.
The
result
is
both
reference
database
giving
context
sequence
data
framework
incorporating
from
future
fostering
increasingly
complete
characterization
Earth’s
diversity.
Microbiology and Molecular Biology Reviews,
Journal Year:
2017,
Volume and Issue:
81(4)
Published: Oct. 12, 2017
Understanding
the
mechanisms
controlling
community
diversity,
functions,
succession,
and
biogeography
is
a
central,
but
poorly
understood,
topic
in
ecology,
particularly
microbial
ecology.
Although
stochastic
processes
are
believed
to
play
nonnegligible
roles
shaping
structure,
their
importance
relative
deterministic
hotly
debated.
The
of
ecological
stochasticity
structure
far
less
appreciated.
Some
main
reasons
for
such
heavy
debates
difficulty
defining
diverse
methods
used
delineating
stochasticity.
Here,
we
provide
critical
review
synthesis
data
from
most
recent
studies
on
assembly
We
then
describe
both
components
embedded
various
processes,
including
selection,
dispersal,
diversification,
drift.
also
different
approaches
inferring
observational
diversity
patterns
highlight
experimental
communities.
In
addition,
research
challenges,
gaps,
future
directions
research.
Ecology Letters,
Journal Year:
2007,
Volume and Issue:
10(4), P. 315 - 331
Published: Feb. 20, 2007
A
latitudinal
gradient
in
biodiversity
has
existed
since
before
the
time
of
dinosaurs,
yet
how
and
why
this
arose
remains
unresolved.
Here
we
review
two
major
hypotheses
for
origin
diversity
gradient.
The
area
hypothesis
holds
that
tropical
climates
are
older
historically
larger,
allowing
more
opportunity
diversification.
This
is
supported
by
observations
temperate
taxa
often
younger
than,
nested
within,
taxa,
positively
correlated
with
age
geographical
regions.
diversification
rate
regions
diversify
faster
due
to
higher
rates
speciation
(caused
increased
opportunities
evolution
reproductive
isolation,
or
molecular
evolution,
importance
biotic
interactions),
lower
extinction
rates.
There
phylogenetic
evidence
clades,
palaeontological
data
demonstrate
origination
but
mixed
differences
Studies
variation
incipient
also
suggest
tropics.
Distinguishing
roles
history,
represents
a
challenge
future
research.
Ecology Letters,
Journal Year:
2004,
Volume and Issue:
8(2), P. 224 - 239
Published: Dec. 17, 2004
Abstract
Despite
two
centuries
of
exploration,
our
understanding
factors
determining
the
distribution
life
on
Earth
is
in
many
ways
still
its
infancy.
Much
disagreement
about
governing
processes
variation
species
richness
may
be
result
differences
perception
species‐richness
patterns.
Until
recently,
most
studies
large‐scale
patterns
assumed
implicitly
that
and
mechanisms
were
scale
invariant.
Illustrated
with
examples
a
quantitative
analysis
published
data
altitudinal
gradients
(
n
=
204),
this
review
discusses
how
effects
(extent
grain
size)
can
influence
processes.
For
example,
hump‐shaped
pattern
typical
c
.
50%),
monotonic
decreasing
25%)
also
frequently
reported,
but
relative
changes
readily
spatial
extent.
If
we
are
to
attribute
impact
various
influencing
decide
at
which
point
along
temporal
continuum
they
act,
should
not
ask
only
results
vary
as
function
search
for
consistent
these
effects.
The
concludes
suggestions
potential
routes
future
analytical
exploration
American Journal of Botany,
Journal Year:
2011,
Volume and Issue:
98(3), P. 426 - 438
Published: March 1, 2011
•
Premise
of
the
study:
Fungi
are
major
decomposers
in
certain
ecosystems
and
essential
associates
many
organisms.
They
provide
enzymes
drugs
serve
as
experimental
In
1991,
a
landmark
paper
estimated
that
there
1.5
million
fungi
on
Earth.
Because
only
70000
had
been
described
at
time,
estimate
has
impetus
to
search
for
previously
unknown
fungi.
Fungal
habitats
include
soil,
water,
organisms
may
harbor
large
numbers
understudied
fungi,
outnumber
plants
by
least
6
1.
More
recent
estimates
based
high‐throughput
sequencing
methods
suggest
5.1
fungal
species
exist.
Methods:
Technological
advances
make
it
possible
apply
molecular
develop
stable
classification
discover
identify
taxa.
Key
results:
Molecular
have
dramatically
increased
our
knowledge
less
than
20
years,
revealing
monophyletic
kingdom
diversity
among
early‐diverging
lineages.
Mycologists
making
significant
discovery,
but
remain
be
discovered.
Conclusions:
survival
groups
with
which
they
form
associations.
also
attract
attention
predators
invertebrate
animals,
pathogens
potatoes
rice
humans
bats,
killers
frogs
crayfish,
producers
secondary
metabolites
lower
cholesterol,
subjects
prize‐winning
research.
tools
use
under
development
can
used
world's
1000
years
predicted
current
new
acquisition
rates.
Annual Review of Ecology Evolution and Systematics,
Journal Year:
2009,
Volume and Issue:
40(1), P. 245 - 269
Published: Aug. 31, 2009
Biotic
interactions
are
believed
to
play
a
role
in
the
origin
and
maintenance
of
species
diversity,
multiple
hypotheses
link
latitudinal
diversity
gradient
presumed
importance
biotic
interactions.
Here
we
address
whether
more
important
at
low
latitudes,
finding
support
for
this
hypothesis
from
wide
range
Some
best-supported
examples
higher
herbivory
insect
predation
tropics,
predominantly
tropical
mutualisms
such
as
cleaning
symbioses
ant-plant
For
studies
that
included
regions,
were
never
high
latitudes.
Although
our
results
additional
research
is
needed,
including
comparisons
rates
molecular
evolution
genes
involved
interactions,
estimates
gradients
interaction
strength,
phylogenetic
traits
mediate